[ { "id": "https://authors.library.caltech.edu/records/h5qk5-q2c59", "eprint_id": 113782, "eprint_status": "archive", "datestamp": "2023-08-20 07:13:08", "lastmod": "2024-01-15 21:25:40", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Perez-Marcos", "name": { "family": "Perez", "given": "Marcos" } }, { "id": "Gatkine-Pradip-R", "name": { "family": "Gatkine", "given": "Pradip" }, "orcid": "0000-0002-1955-2230" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Jewell-Jeffrey-B", "name": { "family": "Jewell", "given": "Jeffrey" } }, { "id": "Wallace-J-Kent", "name": { "family": "Wallace", "given": "J. Kent" }, "orcid": "0000-0001-5299-6899" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Simulating the study of exoplanets using photonic spectrographs", "ispublished": "unpub", "full_text_status": "public", "keywords": "Astrophotonic spectrographs, Arrayed Waveguide Gratings, On-chip, Line Spread Function, Exoplanets", "note": "\u00a9 2022 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nM. Perez acknowledges the support from Caltech Summer Undergraduate Research Fellowship (SURF) program and the funding provided by the Flintridge Foundation for his work in the summer of 2021. P. Gatkine was supported by NASA Hubble Fellowship program as well as David & Ellen Lee Fellowship at Caltech. This work was supported by the Wilf Family Discovery Fund in Space and Planetary Science, funded by the Wilf Family Foundation. This research was carried out at the California Institute of Technology and the Jet Propulsion Laboratory under a contract with the National Aeronautics and Space Administration (NASA) and funded through the President's and Director's Research & Development Fund Program.\n\n
Published - 120080C.pdf
Accepted Version - 2203.10153.pdf
", "abstract": "Photonic spectrographs offer a highly miniaturized, flexible, and stable on-chip solution for astronomical spectroscopy and can be used for various science cases such as determining the atmospheric composition of exoplanets to understand their habitability, formation, and evolution. Arrayed Waveguide Gratings (AWGs) have shown the best promise to be used as an astrophotonic spectrograph. We developed a publicly-available tool to conduct a preliminary examination of the capability of the AWGs in spectrally resolving exoplanet atmospheres. We derived the Line-Spread- Function (LSF) as a function of wavelength and the Full-Width-at-Half-Maximum (FWHM) of the LSF as a function of spectral line width to evaluate the response of a discretely- and continuously sampled low-resolution AWG (R ~ 1000). We observed that the LSF has minimal wavelength dependence (~5%), irrespective of the offset with respect to the center-wavelengths of the AWG channels, contrary to the previous assumptions. We further confirmed that the observed FWHM scales linearly with the emission line width. Finally, we present simulated extraction of a sample molecular absorption spectrum with the discretely- and continuously-sampled low-resolution AWGs. From this, we show that while the discrete AWG matches its expected resolving power, the continuous AWG spectrograph can, in principle, achieve an effective resolution significantly greater (~ 2x) than the discrete AWG. This detailed examination of the AWGs will be foundational for future deployment of AWG spectrographs for astronomical science cases such as exoplanet atmospheres.", "date": "2022-03-05", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers", "id_number": "CaltechAUTHORS:20220307-189697000", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220307-189697000", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Caltech Summer Undergraduate Research Fellowship (SURF)" }, { "agency": "Flintridge Foundation" }, { "agency": "NASA Hubble Fellowship" }, { "agency": "David and Ellen Lee Postdoctoral Scholarship" }, { "agency": "Wilf Family Foundation" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "JPL President and Director's Fund" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Busse-Lynda-E", "name": { "family": "Busse", "given": "Lynda E." } }, { "id": "Soskind-Yakov", "name": { "family": "Soskind", "given": "Yakov" } } ] }, "doi": "10.1117/12.2610355", "primary_object": { "basename": "2203.10153.pdf", "url": "https://authors.library.caltech.edu/records/h5qk5-q2c59/files/2203.10153.pdf" }, "related_objects": [ { "basename": "120080C.pdf", "url": "https://authors.library.caltech.edu/records/h5qk5-q2c59/files/120080C.pdf" } ], "resource_type": "book_section", "pub_year": "2022", "author_list": "Perez, Marcos; Gatkine, Pradip; et el." }, { "id": "https://authors.library.caltech.edu/records/k27dg-gzy03", "eprint_id": 115121, "eprint_status": "archive", "datestamp": "2023-08-20 05:05:18", "lastmod": "2024-01-15 21:26:47", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Desai-Niyati", "name": { "family": "Desai", "given": "Niyati" }, "orcid": "0000-0002-2843-8325" }, { "id": "Llop-Sayson-Jorge-D", "name": { "family": "Llop-Sayson", "given": "Jorge" }, "orcid": "0000-0002-3414-784X" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Serabyn-Eugene", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Martin-Stefan-R", "name": { "family": "Martin", "given": "Stefan" }, "orcid": "0000-0002-6662-9560" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "High contrast demonstrations of novel scalar vortex coronagraph designs at the high contrast spectroscopy testbed", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, instrumentation, exoplanets, scalar vortex coronagraph", "note": "\u00a9 2021 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was supported by the NASA ROSES APRA program, grant NM0018F610. Part of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.\n\nAccepted Version - 2205.10870.pdf
", "abstract": "For direct imaging of exoplanets, Scalar Vortex Coronagraphs (SVCs) are an attractive alternative to the popularly used Vector Vortex Coronagraphs (VVCs). This is primarily because they are able to induce the same phase ramp regardless of the incoming light's polarization state without compromising throughput while maintaining small inner working angle. We tested a set of stepped SVC staircase masks in the Exoplanet Technology Laboratory (ET Lab) at Caltech on the High-Contrast Spectroscopy Testbed (HCST). Here we present some preliminary findings of their starlight suppression ability, achieving raw contrasts on the order of 10\u207b\u2075 for 7 to 9 \u03bb/D. We also characterized their chromatic performance and performed wavefront control to achieve preliminary contrasts on the order of 10\u207b\u2077 with EFC for 6 to 10 \u03bb/D. These initial experimental results with SVCs have shown scalar vortex technology has a great potential for future exoplanet direct imaging missions.", "date": "2021-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "id_number": "CaltechAUTHORS:20220610-246088900", "editors": { "items": [ { "id": "Shaklan-Stuart-B", "name": { "family": "Shaklan", "given": "Stuart" } }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" } ] }, "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220610-246088900", "funders": { "items": [ { "agency": "NASA", "grant_number": "NM0018F610" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1117/12.2603953", "primary_object": { "basename": "2205.10870.pdf", "url": "https://authors.library.caltech.edu/records/k27dg-gzy03/files/2205.10870.pdf" }, "resource_type": "book_section", "pub_year": "2021", "author_list": "Desai, Niyati; Llop-Sayson, Jorge; et el." }, { "id": "https://authors.library.caltech.edu/records/pnprc-ngb39", "eprint_id": 111530, "eprint_status": "archive", "datestamp": "2023-08-20 05:03:06", "lastmod": "2024-01-15 21:24:26", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Llop-Sayson-Jorge-D", "name": { "family": "Llop-Sayson", "given": "Jorge" }, "orcid": "0000-0002-3414-784X" }, { "id": "Kappel-Cole", "name": { "family": "Kappel", "given": "Cole" } }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "New method to achieve the proper polarization state for a vector vortex coronagraph", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, Exoplanets, Coronagraphs", "note": "\u00a9 2021 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe material is based upon work supported by NASA SAT under award No. 80NSSC20K0624. C. K. is supported by the Caltech WAVE program. J.L.-S. thanks Garreth Ruane for helpful discussions.\n\nPublished - 118230P.pdf
Accepted Version - 2108.07371.pdf
", "abstract": "Characterizing the atmospheres of Earth-sized planets necessitates of the advancement in broadband wavefront control for coronagraph systems in large segmented telescopes. At the the High-Contrast Spectroscopy Testbed (HCST) in the Exoplanet Technology Laboratory (ET Lab) at Caltech we are working on a new concept that utilizes single mode fibers (SMFs) at the image plane of the coronagraph to recover the light from the planet and feed it into a spectrograph. This technology has shown to be advantageous in both chromatic and wavefront control performance. Here we report on the status of our 20% bandwidth wavefront control experiments, in which we control the starlight coupling into an SMF in the image plane. We achieve levels of 10\u207b\u2078 with deformable mirror (DM) solutions that hold the null through the SMF for several hours.", "date": "2021-09-03", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 118230P", "id_number": "CaltechAUTHORS:20211018-185302996", "isbn": "9781510644847", "book_title": "Techniques and Instrumentation for Detection of Exoplanets X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20211018-185302996", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "80NSSC20K0624" }, { "agency": "Caltech WAVE Fellowship" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-Stuart-B", "name": { "family": "Shaklan", "given": "Stuart B." } }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" } ] }, "doi": "10.1117/12.2594871", "primary_object": { "basename": "118230P.pdf", "url": "https://authors.library.caltech.edu/records/pnprc-ngb39/files/118230P.pdf" }, "related_objects": [ { "basename": "2108.07371.pdf", "url": "https://authors.library.caltech.edu/records/pnprc-ngb39/files/2108.07371.pdf" } ], "resource_type": "book_section", "pub_year": "2021", "author_list": "Llop-Sayson, Jorge; Kappel, Cole; et el." }, { "id": "https://authors.library.caltech.edu/records/ntjtf-wbx69", "eprint_id": 115127, "eprint_status": "archive", "datestamp": "2023-08-20 05:01:28", "lastmod": "2024-01-15 21:26:49", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "Jacques-Robert" }, "orcid": "0000-0001-8953-1008" }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason" }, "orcid": "0000-0003-0774-6502" }, { "id": "Millar-Blanchaer-Maxwell-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell A." }, "orcid": "0000-0001-6205-9233" }, { "id": "Xuan-Jerry-W", "name": { "family": "Xuan", "given": "Jerry" }, "orcid": "0000-0002-6618-1137" }, { "id": "Toman-Katie", "name": { "family": "Toman", "given": "Katie" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Broadband vortex fiber nulling: high-dispersion exoplanet science at the diffraction limit", "ispublished": "unpub", "full_text_status": "restricted", "keywords": "Exoplanets, Interferometry, Instrumentation, High Dispersion Coronagraphy, Keck Telescope, Fiber Nulling", "note": "\u00a9 2021 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nDaniel Echeverri is supported by a NASA Future Investigators in NASA Earth and Space Science and Technology (FINESST) fellowship under award #80NSSC19K1423. This work was supported by the Heising-Simons Foundation through grants #2015-129, #2017-318, and #2019-1312. Part of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004).\n\nThe authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.", "abstract": "As the number of confirmed exoplanets continues to grow, there is an increased push to spectrally characterize them to determine their atmospheric composition, formation paths, rotation rates, habitability, and much more. However, there is a large population of known exoplanets that either do not transit their star or have been detected at very small angular separations such that they are inaccessible to traditional coronagraph systems. Vortex Fiber Nulling (VFN) is a new single-aperture interferometric technique that uses the entire telescope pupil to bridge the gap between RV methods and traditional coronagraphy by enabling the direct observation and spectral characterization of targets at and within the diffraction limit. By combining a vortex mask with a single mode fiber, the on-axis starlight is rejected while the off-axis planet light is coupled and efficiently routed to a radiometer or spectrograph for analysis. We have demonstrated VFN in the lab monochromatically in the past. In this talk we present a polychromatic validation of VFN with null depths of 1e-4 across 10% bandwidth light. We also provide an update on deployment plans and predicted yield estimates for the VFN mode of the Keck Planet Imager and Characterizer (KPIC) instrument. Using PSISIM, a simulation package developed by our group, we asses KPIC VFN's ability to detect and characterize different types of targets including known exoplanets detected via the RV method. The KPIC VFN on-sky demonstration will pave the road to deployment on future instruments like HISPEC and MODHIS where it could provide high-resolution spectra of sub-Jupiter mass planets down to 5 milliarcseconds from their star.", "date": "2021-09-01", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "id_number": "CaltechAUTHORS:20220610-59544400", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220610-59544400", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA Earth and Space Science Fellowship", "grant_number": "80NSSC19K1423" }, { "agency": "Heising-Simons Foundation", "grant_number": "2015-129" }, { "agency": "Heising-Simons Foundation", "grant_number": "2017-318" }, { "agency": "Heising-Simons Foundation", "grant_number": "2019-1312" }, { "agency": "NASA/JPL/Caltech", "grant_number": "80NM0018D0004" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-Stuart-B", "name": { "family": "Shaklan", "given": "Stuart B." } }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth J." }, "orcid": "0000-0003-4769-1665" } ] }, "doi": "10.1117/12.2597160", "resource_type": "book_section", "pub_year": "2021", "author_list": "Echeverri, Daniel; Ruane, Garreth; et el." }, { "id": "https://authors.library.caltech.edu/records/vjkhq-t3f77", "eprint_id": 115119, "eprint_status": "archive", "datestamp": "2023-08-20 05:01:20", "lastmod": "2024-01-15 21:26:45", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason J." }, "orcid": "0000-0003-0774-6502" }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "Jacques-Robert" }, "orcid": "0000-0001-8953-1008" }, { "id": "Ruffio-Jean-Baptiste", "name": { "family": "Ruffio", "given": "Jean-Baptiste" }, "orcid": "0000-0003-2233-4821" }, { "id": "Morris-Evan-C", "name": { "family": "Morris", "given": "Evan" } }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Schofield-Tobias", "name": { "family": "Schofield", "given": "Tobias" } }, { "id": "Pezzato-Jacklyn", "name": { "family": "Pezzato", "given": "Jacklyn" } }, { "id": "Skemer-Andrew-J", "name": { "family": "Skemer", "given": "Andrew" }, "orcid": "0000-0001-6098-3924" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "High resolution spectroscopy of directly imaged exoplanets with KPIC", "ispublished": "unpub", "full_text_status": "restricted", "keywords": "Exoplanets, high contrast imaging, high resolution spectroscopy, high dispersion coronagraphy, single mode fibers, Keck Planet Imager and Characterizer", "note": "\u00a9 2021 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nJ.J.W. is supported by the Heising-Simons Foundation 51 Pegasi b Fellowship. This work was supported by the Heising-Simons Foundation through grants #2015-129, #2017-318 and #2019-1312. This work was supported by the Simons Foundation. We thank the Keck staff for helping support the deployment of KPIC during the global pandemic. Data presented in this work were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. We wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.", "abstract": "The Keck Planet Imager and Characterizer (KPIC) is a novel instrument that combines high-contrast imaging with high-resolution spectroscopy to enable high-dispersion coronagraphy (HDC) techniques that allow us to characterize directly imaged exoplanets at a spectral resolution of R~35,000. At this resolution, individual absorption lines in planetary atmospheres are spectrally resolved, allowing for measurements of molecular abundances to constrain chemical composition, planetary radial velocities to constrain orbital configurations, and planetary spin to constrain angular momentum evolution. I will provide an overview of the instrument, with a focus on its novel fiber injection unit (FIU) and the use of single mode fibers. I will discuss new HDC techniques we are developing that take advantage of the single-mode fibers of KPIC to both spatially and spectrally filter out the bright glare of the host stars to study the faint exoplanets. In particular, we have demonstrated the ability to forward model the high-resolution spectrum of diffracted stellar speckles, allowing us to directly fit our data without the need for cross-correlation functions. I will present some early science observations from KPIC that successfully demonstrate its technical capabilities, with the highlight being the first detection of all four HR 8799 planets at high spectral resolution. I will conclude with future avenues to push the sensitivity of HDC techniques and discuss possible synergies with other exoplanet characterization techniques such as long-baseline interferometry.", "date": "2021-09-01", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "id_number": "CaltechAUTHORS:20220610-133625200", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220610-133625200", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation", "grant_number": "51 Pegasi b Fellowship" }, { "agency": "Heising-Simons Foundation", "grant_number": "2015-129" }, { "agency": "Heising-Simons Foundation", "grant_number": "2017-318" }, { "agency": "Heising-Simons Foundation", "grant_number": "2019-1312" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-Stuart-B", "name": { "family": "Shaklan", "given": "Stuart" } }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth J." }, "orcid": "0000-0003-4769-1665" } ] }, "doi": "10.1117/12.2596484", "resource_type": "book_section", "pub_year": "2021", "author_list": "Wang, Jason J.; Delorme, Jacques-Robert; et el." }, { "id": "https://authors.library.caltech.edu/records/g2zhy-e4x62", "eprint_id": 115117, "eprint_status": "archive", "datestamp": "2023-08-20 04:45:58", "lastmod": "2024-01-15 21:26:43", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Gatkine-Pradip-R", "name": { "family": "Gatkine", "given": "Pradip" }, "orcid": "0000-0002-1955-2230" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Jewell-Jeffrey-B", "name": { "family": "Jewell", "given": "Jeffrey" } }, { "id": "Wallace-J-Kent", "name": { "family": "Wallace", "given": "J. Kent" }, "orcid": "0000-0001-5299-6899" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "An on-chip astrophotonic spectrograph with a resolving power of 12,000", "ispublished": "unpub", "full_text_status": "public", "keywords": "Photonic spectrograph, Arrayed Waveguide Gratings, Silicon Nitride, Integrated Spectrograph, Astrophotonics, Near-IR", "note": "\u00a9 2021 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nPradip Gatkine was supported by the David and Ellen Lee Postdoctoral Fellowship at the California Institute of Technology. Nemanja Jovanovic acknowledges the help and expertise of BRIGHT Photonics and Ligentec in the design and fabrication of one of the chips tested in this work as part of their MPW service. This work was supported by the Wilf Family Discovery Fund in Space and Planetary Science, funded by the Wilf Family Foundation. This research was carried out at the California Institute of Technology and the Jet Propulsion Laboratory under a contract with the National Aeronautics and Space Administration (NASA) and funded through the President's and Director's Research & Development Fund Program.\n\nAccepted Version - 2203.07867.pdf
", "abstract": "With the upcoming extremely large telescopes (ELTs), the volume, mass, and cost of the associated spectro- graphs will scale with the telescope diameter. Astrophotonics offers a unique solution to this problem in the form of single-mode fiber-fed diffraction-limited spectrographs on a chip. These highly miniaturized chips offer great flexibility in terms of coherent manipulation of photons. Such photonic spectrographs are well-suited to disperse the light from directly imaged planets (post-coronagraph, collected using a single-mode fiber) to characterize exoplanet atmospheres. Here we present the results from a proof-of-concept high-resolution astrophotonic spectrograph using the arrayed waveguide gratings (AWG) architecture. This chip uses the low-loss SiN platform (SiN core, SiO\u2082 cladding) with square waveguides (800 nm ~ 800 nm). The AWG has a measured resolving power (=) of ~ 12,000 and a free spectral range (FSR) of 2.8 nm. While the FSR is small, the chip operates over a broad band (1200 - 1700 nm). The peak on-chip throughput (excluding the coupling efficiency) is ~40% (- 4 dB) and the overall throughput (including the coupling loss) is ~ 11% (- 9.6 dB) in the TE mode. Thanks to the high-confinement waveguide geometry, the chip is highly miniaturized with a size of only 7.4 mm x 2 mm. This demonstration highlights the utility of SiN platform for astrophotonics, particularly, the capability of commercial SiN foundries to fabricate ultra-small, high-resolution, high-throughput AWG spectrographs on a chip suitable for astronomical applications.", "date": "2021-08-20", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "id_number": "CaltechAUTHORS:20220610-860340600", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220610-860340600", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "David and Ellen Lee Postdoctoral Scholarship" }, { "agency": "Wilf Family Foundation" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "JPL President and Director's Fund" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Barto-Allison-A", "name": { "family": "Barto", "given": "Allison A." } }, { "id": "Breckinridge-J-B", "name": { "family": "Breckinridge", "given": "James B." }, "orcid": "0000-0002-9488-098X" }, { "id": "Stahl-H-Philip", "name": { "family": "Stahl", "given": "H. Philip" } } ] }, "doi": "10.1117/12.2594635", "primary_object": { "basename": "2203.07867.pdf", "url": "https://authors.library.caltech.edu/records/g2zhy-e4x62/files/2203.07867.pdf" }, "resource_type": "book_section", "pub_year": "2021", "author_list": "Gatkine, Pradip; Jovanovic, Nemanja; et el." }, { "id": "https://authors.library.caltech.edu/records/4zcet-wcv85", "eprint_id": 107595, "eprint_status": "archive", "datestamp": "2023-08-20 01:09:09", "lastmod": "2024-01-15 21:20:44", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Morris-Evan-C", "name": { "family": "Morris", "given": "Evan C." } }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason J." }, "orcid": "0000-0003-0774-6502" }, { "id": "Ruffio-Jean-Baptiste", "name": { "family": "Ruffio", "given": "Jean-Baptiste" }, "orcid": "0000-0003-2233-4821" }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "Jacques-Robert" }, "orcid": "0000-0001-8953-1008" }, { "id": "Pezzato-Jacklyn", "name": { "family": "Pezzato", "given": "Jacklyn" } }, { "id": "Bond-Charlotte-Z", "name": { "family": "Bond", "given": "Charlotte Z." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Skemer-Andrew-J", "name": { "family": "Skemer", "given": "Andrew J." }, "orcid": "0000-0001-6098-3924" } ] }, "title": "The Keck Planet Imager and Characterizer: Phase I fiber injection unit early performance and commissioning", "ispublished": "unpub", "full_text_status": "public", "keywords": "high contrast imaging, exoplanets, high dispersion coronography, high resolution spectroscopy, W.M. Keck Observatory", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was supported by the Heising-Simons Foundation through grants #2019-1312 and #2015-129. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA). W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration (NASA). The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - 1144761.pdf
Published - SPIE-AS20-427af017-0b04-ea11-813d-005056be4d05.pdf
Accepted Version - 2012.12318.pdf
", "abstract": "The Keck Planet Imager and Characterizer (KPIC) is an upgrade to the Keck II adaptive optics system and instrument suite with the goal of improving direct imaging and high-resolution spectroscopic characterization capabilities for giant exoplanets. KPIC Phase I includes a fiber injection unit (FIU) downstream of a new pyramid wavefront sensor, coupling planet light to a single mode fiber fed into NIRSPEC, Keck's high-resolution infrared spectrograph. This enables high-dispersion spectroscopy (HDS) of directly imaged exoplanets at smaller separation and higher contrast, improving our spectral characterization capabilities for these objects. Here, we report performance results from the KPIC Phase I FIU commissioning, including analysis of throughput, stability, and sensitivity of the instrument.", "date": "2020-12-28", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1144761", "id_number": "CaltechAUTHORS:20210120-132611750", "isbn": "9781510636811", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VIII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210120-132611750", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation", "grant_number": "2019-1312" }, { "agency": "Heising-Simons Foundation", "grant_number": "2015-129" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Evans-Christopher-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Bryant-Julia-J", "name": { "family": "Bryant", "given": "Julia J." } }, { "id": "Motohara-Kentaro", "name": { "family": "Motohara", "given": "Kentaro" } } ] }, "doi": "10.1117/12.2560852", "primary_object": { "basename": "1144761.pdf", "url": "https://authors.library.caltech.edu/records/4zcet-wcv85/files/1144761.pdf" }, "related_objects": [ { "basename": "2012.12318.pdf", "url": "https://authors.library.caltech.edu/records/4zcet-wcv85/files/2012.12318.pdf" }, { "basename": "SPIE-AS20-427af017-0b04-ea11-813d-005056be4d05.pdf", "url": "https://authors.library.caltech.edu/records/4zcet-wcv85/files/SPIE-AS20-427af017-0b04-ea11-813d-005056be4d05.pdf" } ], "resource_type": "book_section", "pub_year": "2020", "author_list": "Morris, Evan C.; Wang, Jason J.; et el." }, { "id": "https://authors.library.caltech.edu/records/x2jd1-k6t60", "eprint_id": 107178, "eprint_status": "archive", "datestamp": "2023-08-20 00:54:57", "lastmod": "2024-01-15 18:16:31", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason J." }, "orcid": "0000-0003-0774-6502" }, { "id": "Wallace-J-Kent", "name": { "family": "Wallace", "given": "J. Kent" }, "orcid": "0000-0001-5299-6899" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Guyon-Olivier", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Roberts-Mitsuko", "name": { "family": "Roberts", "given": "Mitsuko" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "An atmospheric dispersion corrector design with milliarcsecond-level precision from 1 to 4 microns for high dispersion coronagraphy", "ispublished": "unpub", "full_text_status": "public", "keywords": "High dispersion coronagraphy, atmospheric dispersion corrector", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was supported by the Heising-Simons Foundation through grants #2019-1312 and #2015-129. J. Wang is supported by the Heising-Simons Foundation 51 Pegasi b postdoctoral fellowship. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA). W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration (NASA). The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - 1144754.pdf
Submitted - 2012.06007.pdf
Presentation - SPIE-AS20-0addc13f-4106-ea11-813d-005056be4d05.pdf
", "abstract": "Differential atmospheric refraction (DAR) limits the amount of light that can be coupled into a single mode fiber and provides additional complications for any fiber tracking system. We present an atmospheric dispersion corrector (ADC) design based off of two counter-rotating prisms to fit the needs of exoplanet spectroscopy for the Keck Planet Imager and Characterizer (KPIC) from 1.1 to 4.2 microns. Due to strong telluric effects, we find that the default Zemax prescription for DAR between 2 and 4.2 microns to be inaccurate up to 15 mas when comparing against DAR models computed from first principles. Using first-principle models, we developed our own custom ADC optimization solution and achieve less than 4 mas residual dispersion in any individual science band (J, K, L) down to 60 degree zenith angles, while the whole time maintaining less than 3 mas of residual dispersion in the tracking band (H) and less than 2 mas of residual dispersion between the tracking and science bands.", "date": "2020-12-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1144754", "id_number": "CaltechAUTHORS:20201217-151051056", "isbn": "9781510636811", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VIII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20201217-151051056", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation", "grant_number": "2019-1312" }, { "agency": "Heising-Simons Foundation", "grant_number": "2015-129" }, { "agency": "Heising-Simons Foundation", "grant_number": "51 Pegasi b Fellowship" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "W. M. Keck Foundation" } ] }, "contributors": { "items": [ { "id": "Evans-Christopher-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Bryant-Julia-J", "name": { "family": "Bryant", "given": "Julia J." } }, { "id": "Motohara-Kentaro", "name": { "family": "Motohara", "given": "Kentaro" } } ] }, "doi": "10.1117/12.2562654", "primary_object": { "basename": "1144754.pdf", "url": "https://authors.library.caltech.edu/records/x2jd1-k6t60/files/1144754.pdf" }, "related_objects": [ { "basename": "2012.06007.pdf", "url": "https://authors.library.caltech.edu/records/x2jd1-k6t60/files/2012.06007.pdf" }, { "basename": "SPIE-AS20-0addc13f-4106-ea11-813d-005056be4d05.pdf", "url": "https://authors.library.caltech.edu/records/x2jd1-k6t60/files/SPIE-AS20-0addc13f-4106-ea11-813d-005056be4d05.pdf" } ], "resource_type": "book_section", "pub_year": "2020", "author_list": "Wang, Jason J.; Wallace, J. Kent; et el." }, { "id": "https://authors.library.caltech.edu/records/k9mjc-m6t70", "eprint_id": 107332, "eprint_status": "archive", "datestamp": "2023-08-20 00:58:12", "lastmod": "2024-01-15 21:19:43", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Meeker-Seth-R", "name": { "family": "Meeker", "given": "Seth R." } }, { "id": "Truong-Tuan-N", "name": { "family": "Truong", "given": "Tuan N." } }, { "id": "Roberts-Jennifer-E", "name": { "family": "Roberts", "given": "Jennifer E." } }, { "id": "Shelton-Christopher", "name": { "family": "Shelton", "given": "J. Chris" }, "orcid": "0000-0001-8982-1654" }, { "id": "Fregoso-S-Felipe", "name": { "family": "Fregoso", "given": "S. Felipe" } }, { "id": "Burruss-Rick-S", "name": { "family": "Burruss", "given": "Rick S." } }, { "id": "Dekany-Richard-G", "name": { "family": "Dekany", "given": "Richard G." }, "orcid": "0000-0002-5884-7867" }, { "id": "Wallace-J-Kent", "name": { "family": "Wallace", "given": "J. Kent" }, "orcid": "0000-0001-5299-6899" }, { "id": "Baker-John-W", "name": { "family": "Baker", "given": "John W." } }, { "id": "Heffner-Carolyn-M", "name": { "family": "Heffner", "given": "Carolyn M." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Rykoski-Kevin-M", "name": { "family": "Rykoski", "given": "Kevin M." } }, { "id": "Tesch-Jonathan-A", "name": { "family": "Tesch", "given": "Jonathan A." } }, { "id": "Vasisht-Gautam", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" } ] }, "title": "Design and performance of the PALM-3000 3.5 kHz upgrade", "ispublished": "unpub", "full_text_status": "public", "keywords": "Adaptive Optics, Shack-Hartmann Wavefront Sensor, Electron Multiplying CCD, Real-time Control, Digital Signal Processors", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe authors would like to acknowledge the excellent (and patient) support of the Palomar Observatory staff during this instrument upgrade, re-commissioning, and beyond as we worked to understand this new system. This research was carried out in part at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.\n\nPublished - 114480W.pdf
Submitted - 2012.08659.pdf
", "abstract": "PALM-3000 (P3K), the second-generation adaptive optics (AO) instrument for the 5.1 meter Hale telescope at Palomar Observatory, underwent a significant upgrade to its wavefront sensor (WFS) arm and real-time control (RTC) system in late 2019. Main features of this upgrade include an EMCCD WFS camera capable of 3.5 kHz framerates and advanced Digital Signal Processor (DSP) boards to replace the aging GPU based real-time control system. With this upgrade P3K is able to maintain a lock on natural guide stars fainter than mV=16. Here we present the design and on-sky re-commissioning results of the upgraded system.", "date": "2020-12-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 114480W", "id_number": "CaltechAUTHORS:20210106-074923788", "isbn": "9781510636835", "book_title": "Adaptive Optics Systems VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210106-074923788", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Schreiber-Laura", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-Dirk", "name": { "family": "Schmidt", "given": "Dirk" } }, { "id": "Vernet-Elise", "name": { "family": "Vernet", "given": "Elise" } } ] }, "doi": "10.1117/12.2562931", "primary_object": { "basename": "114480W.pdf", "url": "https://authors.library.caltech.edu/records/k9mjc-m6t70/files/114480W.pdf" }, "related_objects": [ { "basename": "2012.08659.pdf", "url": "https://authors.library.caltech.edu/records/k9mjc-m6t70/files/2012.08659.pdf" } ], "resource_type": "book_section", "pub_year": "2020", "author_list": "Meeker, Seth R.; Truong, Tuan N.; et el." }, { "id": "https://authors.library.caltech.edu/records/ksm43-jqd87", "eprint_id": 107248, "eprint_status": "archive", "datestamp": "2023-08-20 00:56:15", "lastmod": "2024-01-15 18:17:00", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth J." }, "orcid": "0000-0003-4769-1665" }, { "id": "Calvin-Benjamin-A", "name": { "family": "Calvin", "given": "Benjamin" } }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason" }, "orcid": "0000-0003-0774-6502" }, { "id": "Millar-Blanchaer-Maxwell-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell" }, "orcid": "0000-0001-6205-9233" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Serabyn-Eugene", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Wallace-J-Kent", "name": { "family": "Wallace", "given": "J. Kent" }, "orcid": "0000-0001-5299-6899" }, { "id": "Martin-Stefan-R", "name": { "family": "Martin", "given": "Stefan" } } ] }, "title": "Detecting and characterizing close-in exoplanets with vortex fiber nulling", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanets, Interferometry, Instrumentation, High Dispersion Coronagraphy, Keck Telescope, Fiber\nNulling", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nDaniel Echeverri is supported by a NASA Future Investigators in NASA Earth and Space Science and Technology (FINESST) fellowship under award #80NSSC19K1423. This work was supported by the Heising-Simons Foundation through grants #2019-1312 and #2015-129. Part of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004). The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - 1144619.pdf
Submitted - 2012.04239.pdf
", "abstract": "Vortex Fiber Nulling (VFN) is an interferometric method for suppressing starlight to detect and spectroscopically characterize exoplanets. It relies on a vortex phase mask and single-mode fiber to reject starlight while simultaneously coupling up to 20% of the planet light at separations of \u227e 1\u03bb/D, thereby enabling spectroscopic characterization of a large population of RV and transit-detected planets, among others, that are inaccessible to conventional coronagraphs. VFN has been demonstrated in the lab at visible wavelengths and here we present the latest results of these experiments. This includes polychromatic nulls of 5 10\u207b\u2074 in 10% bandwidth light centered around 790 nm. An upgraded testbed has been designed and is being built in the lab now; we also present a status update on that work here. Finally, we present preliminary K-band (2 micron) fiber nulling results with the infrared mask that will be used on-sky as part of a VFN mode for the Keck Planet Imager and Characterizer Instrument in 2021.", "date": "2020-12-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1144619", "id_number": "CaltechAUTHORS:20201222-074738306", "isbn": "9781510636798", "book_title": "Optical and Infrared Interferometry and Imaging VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20201222-074738306", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA Earth and Space Science Fellowship", "grant_number": "80NSSC19K1423" }, { "agency": "Heising-Simons Foundation", "grant_number": "2019-1312" }, { "agency": "Heising-Simons Foundation", "grant_number": "2015-129" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "NASA", "grant_number": "80NM0018D0004" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Tuthill-Peter-G", "name": { "family": "Tuthill", "given": "Peter G." } }, { "id": "M\u00e9rand-Antoine", "name": { "family": "M\u00e9rand", "given": "Antoine" } }, { "id": "Sallum-Stephanie", "name": { "family": "Sallum", "given": "Stephanie" } } ] }, "doi": "10.1117/12.2563142", "primary_object": { "basename": "1144619.pdf", "url": "https://authors.library.caltech.edu/records/ksm43-jqd87/files/1144619.pdf" }, "related_objects": [ { "basename": "2012.04239.pdf", "url": "https://authors.library.caltech.edu/records/ksm43-jqd87/files/2012.04239.pdf" } ], "resource_type": "book_section", "pub_year": "2020", "author_list": "Echeverri, Daniel; Ruane, Garreth J.; et el." }, { "id": "https://authors.library.caltech.edu/records/ed3ck-9rn59", "eprint_id": 107455, "eprint_status": "archive", "datestamp": "2023-08-20 00:59:55", "lastmod": "2023-10-23 15:55:10", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Patru-Fabien", "name": { "family": "Patru", "given": "Fabien" } }, { "id": "Carbillet-Marcel", "name": { "family": "Carbillet", "given": "Marcel" } }, { "id": "Jolissaint-Laurent", "name": { "family": "Jolissaint", "given": "Laurent" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Antichi-Jacopo", "name": { "family": "Antichi", "given": "Jacopo" } } ] }, "title": "Discretized aperture mapping for wavefront sensing", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nPublished - SPIE-AS20-8d319140-ca16-ea11-813d-005056be4d05.pdf
", "abstract": "DAM (Discretized Aperture Mapping) is an original filtering device able to improve the performance in high-angular resolution and high-contrast imaging by the present class of large telescopes equipped with adaptive optics (Patru et al. 2011, 2014, 2015). DAM is a high-spatial frequency filter able to remove the problematic phase errors produced by the small scale defects in the wavefront. Various effects are related to high-order aberrations (ie the high-spatial frequency content) which are neither seen by any wavefront sensor (WFS) nor corrected by any adaptive optics (AO) and is thus transmitted up to the final detector. In particular, any wavefront sensor, due to its finite sub-apertures size, is fundamentally limited by the well-known aliasing effect, where high-spatial frequencies are seen as spurious low frequencies. DAM can be used as an anti-aliasing filter in order to improve both the accuracy of the WFS measurements and the stability of the AO compensation.", "date": "2020-12-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 114462Z", "id_number": "CaltechAUTHORS:20210113-113126221", "isbn": "9781510636798", "book_title": "Optical and Infrared Interferometry and Imaging VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210113-113126221", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Tuthill-Peter-G", "name": { "family": "Tuthill", "given": "Peter G." } }, { "id": "M\u00e9rand-Antoine", "name": { "family": "M\u00e9rand", "given": "Antoine" } }, { "id": "Sallum-Stephanie", "name": { "family": "Sallum", "given": "Stephanie" } } ] }, "doi": "10.1117/12.2564820", "primary_object": { "basename": "SPIE-AS20-8d319140-ca16-ea11-813d-005056be4d05.pdf", "url": "https://authors.library.caltech.edu/records/ed3ck-9rn59/files/SPIE-AS20-8d319140-ca16-ea11-813d-005056be4d05.pdf" }, "resource_type": "book_section", "pub_year": "2020", "author_list": "Patru, Fabien; Carbillet, Marcel; et el." }, { "id": "https://authors.library.caltech.edu/records/pzq9q-8b792", "eprint_id": 107247, "eprint_status": "archive", "datestamp": "2023-08-20 00:56:08", "lastmod": "2024-01-15 18:16:58", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "N." }, "orcid": "0000-0001-5213-6207" }, { "id": "Calvin-Benjamin-A", "name": { "family": "Calvin", "given": "B." } }, { "id": "Porter-Michael-D", "name": { "family": "Porter", "given": "M." }, "orcid": "0000-0003-3168-5586" }, { "id": "Schofield-Tobias", "name": { "family": "Schofield", "given": "T." } }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "J." }, "orcid": "0000-0003-0774-6502" }, { "id": "Roberts-Mitsuko", "name": { "family": "Roberts", "given": "M." } }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "id": "Wallace-J-Kent", "name": { "family": "Wallace", "given": "J. K." }, "orcid": "0000-0001-5299-6899" }, { "id": "Bartos-Randall-D", "name": { "family": "Bartos", "given": "R." } }, { "id": "Pezzato-Jacklyn", "name": { "family": "Pezzato", "given": "J." } }, { "id": "Colborn-Jennah-K", "name": { "family": "Colborn", "given": "J." } }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "J. R." }, "orcid": "0000-0001-8953-1008" }, { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "D." }, "orcid": "0000-0002-1583-2040" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Bond-Charlotte-Z", "name": { "family": "Bond", "given": "C. Z." } }, { "id": "Cetre-Sylvain", "name": { "family": "Cetre", "given": "S." } }, { "id": "Lilley-Scott-J", "name": { "family": "Lilley", "given": "S." } }, { "id": "Ragland-Sam", "name": { "family": "Ragland", "given": "Sam" } }, { "id": "Wizinowich-Peter-L", "name": { "family": "Wizinowich", "given": "P." }, "orcid": "0000-0002-1646-442X" }, { "id": "Jensen-Clem-R-M", "name": { "family": "Jensen-Clem", "given": "R." }, "orcid": "0000-0003-0054-2953" } ] }, "title": "Enhanced high-dispersion coronagraphy with KPIC phase II: design, assembly and status of sub-modules", "ispublished": "unpub", "full_text_status": "public", "keywords": "Wavefront sensing, high contrast imaging, exoplanets, high dispersion coronography, high resolution\nspectroscopy", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was supported by the Heising-Simons Foundation through grants #2019-1312 and #2015-129. G. Ruane was supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444. We thank Dr. Rebecca Jensen-Clem for loaning AOSE for use within the KPIC phase II testing. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA). W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration (NASA). The Observatory was made possible by the generous financial support of the W. M. Keck Foundation.The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - 114474U.pdf
Published - SPIE-AS20-419b45fb-7406-ea11-813d-005056be4d05.pdf
Submitted - 2012.06638.pdf
", "abstract": "The Keck Planet Imager and Characterizer (KPIC) is a purpose-built instrument for high-dispersion coronagraphy in the K and L bands on Keck. This instrument will provide the first high resolution (R>30,000) spectra of known directly imaged exoplanets and low-mass brown dwarf companions visible in the northern hemisphere. KPIC is developed in phases. Phase I is currently at Keck in the early operations stage, and the phase II upgrade will deploy in late 2021. The goal of phase II is to maximize the throughput for planet light and minimize the stellar leakage, hence reducing the exposure time needed to acquire spectra with a given signal-to- noise ratio. To achieve this, KPIC phase II exploits several innovative technologies that have not been combined this way before. These include a 1000-element deformable mirror for wavefront correction and speckle control, a set of lossless beam shaping optics to maximize coupling into the fiber, a pupil apodizer to suppress unwanted starlight, a pupil plane vortex mask to enable the acquisition of spectra at and within the diffraction limit, and an atmospheric dispersion compensator. These modules, when combined with the active fiber injection unit present in phase I, will make for a highly efficient exoplanet characterization platform. In this paper, we will present the final design of the optics and opto-mechanics and highlight some innovative solutions we implemented to facilitate all the new capabilities. We will provide an overview of the assembly and laboratory testing of the sub-modules and some of the results. Finally, we will outline the deployment timeline.", "date": "2020-12-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 114474U", "id_number": "CaltechAUTHORS:20201222-073413143", "isbn": "9781510636811", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VIII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20201222-073413143", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation", "grant_number": "2019-1312" }, { "agency": "Heising-Simons Foundation", "grant_number": "2015-129" }, { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Evans-Christopher-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Bryant-Julia-J", "name": { "family": "Bryant", "given": "Julia J." } }, { "id": "Motohara-Kentaro", "name": { "family": "Motohara", "given": "Kentaro" } } ] }, "doi": "10.1117/12.2563107", "primary_object": { "basename": "114474U.pdf", "url": "https://authors.library.caltech.edu/records/pzq9q-8b792/files/114474U.pdf" }, "related_objects": [ { "basename": "2012.06638.pdf", "url": "https://authors.library.caltech.edu/records/pzq9q-8b792/files/2012.06638.pdf" }, { "basename": "SPIE-AS20-419b45fb-7406-ea11-813d-005056be4d05.pdf", "url": "https://authors.library.caltech.edu/records/pzq9q-8b792/files/SPIE-AS20-419b45fb-7406-ea11-813d-005056be4d05.pdf" } ], "resource_type": "book_section", "pub_year": "2020", "author_list": "Jovanovic, N.; Calvin, B.; et el." }, { "id": "https://authors.library.caltech.edu/records/3z2mp-w5d91", "eprint_id": 107384, "eprint_status": "archive", "datestamp": "2023-08-22 08:00:43", "lastmod": "2024-01-15 21:20:00", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Cantalloube-Faustine", "name": { "family": "Cantalloube", "given": "F." }, "orcid": "0000-0002-3968-3780" }, { "id": "Gomez-Gonzalez-Carlos", "name": { "family": "Gomez-Gonzalez", "given": "C." } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Cantero-Carles", "name": { "family": "Cantero", "given": "C." } }, { "id": "Bacher-Regis", "name": { "family": "Bacher", "given": "R." } }, { "id": "Bonse-J-Markus", "name": { "family": "Bonse", "given": "J. M." } }, { "id": "Bottom-Michael", "name": { "family": "Bottom", "given": "M." }, "orcid": "0000-0003-1341-5531" }, { "id": "Dahlqvist-Carl-Henrik", "name": { "family": "Dahlqvist", "given": "C.-H." }, "orcid": "0000-0003-4994-9244" }, { "id": "Desgrange-C\u00e9lia", "name": { "family": "Desgrange", "given": "C." } }, { "id": "Flasseur-Olivier", "name": { "family": "Flasseur", "given": "O." } }, { "id": "Fuhrmann-Thomas", "name": { "family": "Fuhrmann", "given": "T." }, "orcid": "0000-0002-6824-0479" }, { "id": "Henning-Thomas-H", "name": { "family": "Henning", "given": "Th." }, "orcid": "0000-0002-1493-300X" }, { "id": "Jensen-Clem-R-M", "name": { "family": "Jensen-Clem", "given": "R." }, "orcid": "0000-0003-0054-2953" }, { "id": "Kenworthy-Matthew-A", "name": { "family": "Kenworthy", "given": "M." }, "orcid": "0000-0002-7064-8270" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Mesa-Dino", "name": { "family": "Mesa", "given": "D." }, "orcid": "0000-0001-8467-1933" }, { "id": "Meshkat-Tiffany", "name": { "family": "Meshkat", "given": "T." }, "orcid": "0000-0001-6126-2467" }, { "id": "Mouillet-David", "name": { "family": "Mouillet", "given": "D." } }, { "id": "M\u00fcller-Andr\u00e9", "name": { "family": "M\u00fcller", "given": "A." } }, { "id": "Nasedkin-Evert", "name": { "family": "Nasedkin", "given": "E." }, "orcid": "0000-0002-9792-3121" }, { "id": "Pairet-Beno\u00eet", "name": { "family": "Pairet", "given": "B." }, "orcid": "0000-0002-8731-033X" }, { "id": "Pi\u00e9rard-S\u00e9bastien", "name": { "family": "Pi\u00e9rard", "given": "S." }, "orcid": "0000-0001-8076-1157" }, { "id": "Ruffio-Jean-Baptiste", "name": { "family": "Ruffio", "given": "J.-B." }, "orcid": "0000-0003-2233-4821" }, { "id": "Samland-Matthias", "name": { "family": "Samland", "given": "M." }, "orcid": "0000-0001-9992-4067" }, { "id": "Stone-Jordan", "name": { "family": "Stone", "given": "J." }, "orcid": "0000-0003-0454-3718" }, { "id": "Van-Droogenbroeck-Marc", "name": { "family": "Van Droogenbroeck", "given": "M." }, "orcid": "0000-0001-6260-6487" } ] }, "title": "Exoplanet imaging data challenge: benchmarking the various image processing methods for exoplanet detection", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanet detection; High-contrast imaging; Adaptive Optics; Coronagraphy; Post-processing techniques; Data challenge", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe EIDC collaboration would like to thank the GPIES collaboration and the SHINE collaboration, for providing us the pre-reduced data from Gemini/GPI and VLT/SPHERE respectively. This research has benefited from the SpeX Prism Spectral Libraries, maintained by Adam Burgasser at http://pono.ucsd.edu/~adam/browndwarfs/spexprism. This work was supported by the Fonds de la Recherche Scientifique-FNRS under Grant n F.4504.18 and by the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement n 819155). T.H. acknowledges support from the European Research Council under the Horizon 2020 Framework Program via the ERC Advanced Grant Origins 832428.\n\nPublished - 114485A.pdf
Published - SPIE-AS20-ec33ebe5-faa3-ea11-8143-005056be4d05.pdf
Accepted Version - 2101.05080.pdf
", "abstract": "The Exoplanet Imaging Data Challenge is a community-wide effort meant to offer a platform for a fair and common comparison of image processing methods designed for exoplanet direct detection. For this purpose, it gathers on a dedicated repository (Zenodo), data from several high-contrast ground-based instruments worldwide in which we injected synthetic planetary signals. The data challenge is hosted on the CodaLab competition platform, where participants can upload their results. The specifications of the data challenge are published on our website https://exoplanet-imaging-challenge.github.io/. The first phase, launched on the 1st of September 2019 and closed on the 1st of October 2020, consisted in detecting point sources in two types of common data-set in the field of high-contrast imaging: data taken in pupil-tracking mode at one wavelength (subchallenge 1, also referred to as ADI) and multispectral data taken in pupil-tracking mode (subchallenge 2, also referred to as ADI+mSDI). In this paper, we describe the approach, organisational lessons-learnt and current limitations of the data challenge, as well as preliminary results of the participants' submissions for this first phase. In the future, we plan to provide permanent access to the standard library of data sets and metrics, in order to guide the validation and support the publications of innovative image processing algorithms dedicated to high-contrast imaging of planetary systems.", "date": "2020-12-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 114485A", "id_number": "CaltechAUTHORS:20210108-143245499", "isbn": "9781510636835", "book_title": "Adaptive Optics Systems VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210108-143245499", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fonds de la Recherche Scientifique (FNRS)", "grant_number": "F.4504.18" }, { "agency": "European Research Council (ERC)", "grant_number": "819155" }, { "agency": "European Research Council (ERC)", "grant_number": "832428" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Schreiber-Laura", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-Dirk", "name": { "family": "Schmidt", "given": "Dirk" } }, { "id": "Vernet-Elise", "name": { "family": "Vernet", "given": "Elise" } } ] }, "doi": "10.1117/12.2574803", "primary_object": { "basename": "114485A.pdf", "url": "https://authors.library.caltech.edu/records/3z2mp-w5d91/files/114485A.pdf" }, "related_objects": [ { "basename": "2101.05080.pdf", "url": "https://authors.library.caltech.edu/records/3z2mp-w5d91/files/2101.05080.pdf" }, { "basename": "SPIE-AS20-ec33ebe5-faa3-ea11-8143-005056be4d05.pdf", "url": "https://authors.library.caltech.edu/records/3z2mp-w5d91/files/SPIE-AS20-ec33ebe5-faa3-ea11-8143-005056be4d05.pdf" } ], "resource_type": "book_section", "pub_year": "2020", "author_list": "Cantalloube, F.; Gomez-Gonzalez, C.; et el." }, { "id": "https://authors.library.caltech.edu/records/djy9b-59w24", "eprint_id": 107385, "eprint_status": "archive", "datestamp": "2023-08-20 00:58:57", "lastmod": "2024-01-15 21:20:02", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Serabyn-Eugene", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Mejia-Prada-Camilo", "name": { "family": "Mejia Prada", "given": "Camilo" } }, { "id": "Baxter-Wesley", "name": { "family": "Baxter", "given": "Wesley" } }, { "id": "Bendek-Eduardo-A", "name": { "family": "Bendek", "given": "Eduardo" }, "orcid": "0000-0002-9408-8925" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Riggs-A-J-Eldorado", "name": { "family": "Riggs", "given": "A. J. Eldorado" }, "orcid": "0000-0002-0863-6228" } ] }, "title": "Experimental analysis of the achromatic performance of a vector vortex coronagraph", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, exoplanets, coronagraphs", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA).\n\nPublished - 114432O.pdf
Submitted - 2012.07728.pdf
", "abstract": "The vector vortex coronagraph is an instrument designed for direct detection and spectroscopy of exoplanets over a broad spectral range. Our team is working towards demonstrating contrast performance commensurate with imaging temperate, terrestrial planets orbiting solar-type stars using the High Contrast Imaging Testbed facility at NASA's Jet Propulsion Laboratory. To date, the best broadband performance achieved is ~10\u207b\u2078 raw contrast over a bandwidth of \u0394\u03bb/\u03bb=10% in the visible regime (central wavelengths of 550 nm-750 nm), while monochromatic tests yield much deeper contrast (~10\u207b\u2079 or better). In this study, we analyze the main performance limitations on the testbeds so far, focusing on the quality of the focal plane mask manufacturing. We measure the polarization properties of the masks and the residual electric field in the dark hole as a function of wavelength. Our results suggest that the current performance is limited by localized defects in the in the focal plane masks. A new generation of masks is under test that have fewer defects and promise performance improvements.", "date": "2020-12-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 114432O", "id_number": "CaltechAUTHORS:20210108-145720027", "isbn": "9781510636736", "book_title": "Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210108-145720027", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Lystrup-Makenzie", "name": { "family": "Lystrup", "given": "Makenzie" } }, { "id": "Perrin-Marshall-D", "name": { "family": "Perrin", "given": "Marshall D." } }, { "id": "Batalha-Natalie-M", "name": { "family": "Batalha", "given": "Natalie" } }, { "id": "Siegler-Nicholas", "name": { "family": "Siegler", "given": "Nicholas" } }, { "id": "Tong-Edward-C", "name": { "family": "Tong", "given": "Edward C." } } ] }, "doi": "10.1117/12.2561593", "primary_object": { "basename": "114432O.pdf", "url": "https://authors.library.caltech.edu/records/djy9b-59w24/files/114432O.pdf" }, "related_objects": [ { "basename": "2012.07728.pdf", "url": "https://authors.library.caltech.edu/records/djy9b-59w24/files/2012.07728.pdf" } ], "resource_type": "book_section", "pub_year": "2020", "author_list": "Ruane, Garreth; Serabyn, Eugene; et el." }, { "id": "https://authors.library.caltech.edu/records/bv83h-wpd64", "eprint_id": 107135, "eprint_status": "archive", "datestamp": "2023-08-20 00:53:52", "lastmod": "2024-01-15 18:15:58", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Carlotti-Alexis", "name": { "family": "Carlotti", "given": "Alexis" }, "orcid": "0000-0002-5859-0141" }, { "id": "Mouillet-David", "name": { "family": "Mouillet", "given": "David" } }, { "id": "Bidot-Alexis", "name": { "family": "Bidot", "given": "Alexis" } }, { "id": "Bourdarot-Guillaume", "name": { "family": "Bourdarot", "given": "Guillaume" }, "orcid": "0000-0002-6777-6386" }, { "id": "Correia-Jean-Jacques", "name": { "family": "Correia", "given": "Jean-Jacques" } }, { "id": "Jocou-Laurent", "name": { "family": "Jocou", "given": "Laurent" }, "orcid": "0000-0001-9376-1818" }, { "id": "Delboulb\u00e9-Alain", "name": { "family": "Delboulb\u00e9", "given": "Alain" } }, { "id": "le-Coarer-Etienne-P", "name": { "family": "Le Coarer", "given": "Etienne P." }, "orcid": "0000-0001-6571-5494" }, { "id": "Doyon-Ren\u00e9", "name": { "family": "Doyon", "given": "Ren\u00e9" }, "orcid": "0000-0001-5485-4675" }, { "id": "Artigau-\u00c9tienne", "name": { "family": "Artigau", "given": "\u00c9tienne" }, "orcid": "0000-0003-3506-5667" }, { "id": "Vall\u00e9e-Philippe", "name": { "family": "Vall\u00e9e", "given": "Philippe" } }, { "id": "Roux-Alain", "name": { "family": "Roux", "given": "Alain" } }, { "id": "Feautrier-Philippe", "name": { "family": "Feautrier", "given": "Philippe" } }, { "id": "Rabou-Patrick", "name": { "family": "Rabou", "given": "Patrick" } }, { "id": "Forveille-Thierry", "name": { "family": "Forveille", "given": "Thierry" }, "orcid": "0000-0003-0536-4607" }, { "id": "Bonfils-Xavier", "name": { "family": "Bonfils", "given": "Xavier" }, "orcid": "0000-0001-9003-8894" }, { "id": "Lo-Casio-Guillaume", "name": { "family": "Lo-Cascio", "given": "Guillaume" } }, { "id": "Parthasarathy-Ambarish", "name": { "family": "Parthasarathy", "given": "Ambarish" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Vasisht-Gautam", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" }, { "id": "Vigan-Arthur", "name": { "family": "Vigan", "given": "Arthur" }, "orcid": "0000-0002-5902-7828" }, { "id": "Otten-Gilles", "name": { "family": "Otten", "given": "Gilles" }, "orcid": "0000-0002-6717-1977" } ] }, "title": "High-resolution spectroscopy of diffraction-limited sources: laboratory tests of an innovative near-IR demonstrator", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2020 SPIE.", "abstract": "Current high-resolution spectrometers have been designed for seeing-limited sources. Designing a spectrometer for diffraction-limited sources makes it possible to significantly improves its compacity and cost, but it also opens up new concepts, including better efficiency, and adaptability to various spectral domains, and up to very high resolution (several 10\u2075). A novel, near-IR, R~80000 spectrometer has been developed at IPAG to characterize two sources at once in the H or K bands. Its design is based on a virtually imaged phased array instead of an \u00e9chelle grating, which allows the spectrometer to fit inside a 0.2 m\u00b3 cryostat, and results in a gain in throughput with respect to usual \u00e9chelle spectrographs. One specific science case that can benefit from this new type of design is the characterization of exoplanets' atmosphere. This paper presents the results of its test in the laboratory, as well as the preparation for an on-sky demonstration tentatively scheduled for summer 2020.", "date": "2020-12-13", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 114512B", "id_number": "CaltechAUTHORS:20201216-152239703", "isbn": "9781510636897", "book_title": "Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20201216-152239703", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Navarro-Ram\u00f3n", "name": { "family": "Navarro", "given": "Ram\u00f3n" } }, { "id": "Geyl-Roland", "name": { "family": "Geyl", "given": "Roland" } } ] }, "doi": "10.1117/12.2560666", "resource_type": "book_section", "pub_year": "2020", "author_list": "Carlotti, Alexis; Mouillet, David; et el." }, { "id": "https://authors.library.caltech.edu/records/y39mc-9jg33", "eprint_id": 107367, "eprint_status": "archive", "datestamp": "2023-08-20 00:58:36", "lastmod": "2024-01-15 21:19:53", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wizinowich-Peter-L", "name": { "family": "Wizinowich", "given": "P." }, "orcid": "0000-0002-1646-442X" }, { "id": "Chin-Jason-C-Y", "name": { "family": "Chin", "given": "J." } }, { "id": "Correia-Carlos", "name": { "family": "Correia", "given": "C." }, "orcid": "0000-0002-6996-0734" }, { "id": "Lu-Jessica-R", "name": { "family": "Lu", "given": "J." }, "orcid": "0000-0001-9611-0009" }, { "id": "Brown-Thomas-M", "name": { "family": "Brown", "given": "T." }, "orcid": "0000-0002-1793-9968" }, { "id": "Casey-Kelleen", "name": { "family": "Casey", "given": "K." } }, { "id": "Cetre-Sylvain", "name": { "family": "Cetre", "given": "S." } }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "J-R." }, "orcid": "0000-0001-8953-1008" }, { "id": "Gers-Luke", "name": { "family": "Gers", "given": "L." } }, { "id": "Hunter-Lisa", "name": { "family": "Hunter", "given": "L." } }, { "id": "Lilley-Scott-J", "name": { "family": "Lilley", "given": "S." } }, { "id": "Ragland-Sam", "name": { "family": "Ragland", "given": "S." } }, { "id": "Surendran-Avinash", "name": { "family": "Surendran", "given": "A." } }, { "id": "Wetherell-Edward", "name": { "family": "Wetherell", "given": "E." } }, { "id": "Ghez-Andrea-M", "name": { "family": "Ghez", "given": "A." }, "orcid": "0000-0003-3230-5055" }, { "id": "Do-Tuan", "name": { "family": "Do", "given": "T." }, "orcid": "0000-0001-9554-6062" }, { "id": "Jones-Tucker", "name": { "family": "Jones", "given": "T." }, "orcid": "0000-0001-5860-3419" }, { "id": "Liu-Michael-C", "name": { "family": "Liu", "given": "M." }, "orcid": "0000-0003-2232-7664" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Max-Claire-E", "name": { "family": "Max", "given": "C." }, "orcid": "0000-0003-0682-5436" }, { "id": "Morris-Mark-R", "name": { "family": "Morris", "given": "M." }, "orcid": "0000-0002-6753-2066" }, { "id": "Treu-Tommaso", "name": { "family": "Treu", "given": "T." }, "orcid": "0000-0002-8460-0390" }, { "id": "Wright-Shelley-A", "name": { "family": "Wright", "given": "S." }, "orcid": "0000-0003-1034-8054" } ] }, "title": "Keck all sky precision adaptive optics: project overview", "ispublished": "unpub", "full_text_status": "public", "keywords": "adaptive optics, laser tomography, near-infrared sensing, PSF reconstruction", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. Funding support for the KAPA system provided by the National Science Foundation Mid Scale Innovations Program award AST-1836016 (PI: Wizinowich). The Keck II real-time controller is funded by the NSF Major Research for Instrumentation Program award AST-1727071 (Wizinowich). Funding support for the KAPA science programs is provided by the Gordon and Betty Moore Foundation through awards to UH (Liu), UCSD (Wright) and two awards to UCLA (Ghez and Treu), and sub-awards to CIT (Mawet), UCB (Lu) and UCD (Jones). Funding support for the AstroTech instrumentation intensive is provided by the Heising-Simons Foundation through UCSC (Hunter) and UCB (Lu). The turbulence simulator is supported by a grant from R. Simperman.\n\nPublished - 114480E.pdf
", "abstract": "We present the status and plans for the Keck All sky Precision Adaptive optics (KAPA) program. KAPA includes four key science programs, an upgrade to the Keck I laser guide star (LGS) adaptive optics (AO) facility to improve image quality and sky coverage, AO telemetry based point spread function (PSF) estimates for all science exposures, and an educational component focused on broadening the participation of women and underrepresented groups in instrumentation. For the purpose of this conference we will focus on the AO facility upgrade which includes implementation of a new laser, wavefront sensor and real-time controller to support laser tomography, the laser tomography system itself, and modifications to an existing near-infrared tip-tilt sensor to support multiple natural guide star (NGS) and focus measurements.", "date": "2020-12-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 114480E", "id_number": "CaltechAUTHORS:20210107-132137961", "isbn": "9781510636835", "book_title": "Adaptive Optics Systems VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210107-132137961", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" }, { "agency": "NSF", "grant_number": "AST-1836016" }, { "agency": "NSF", "grant_number": "AST-1727071" }, { "agency": "Gordon and Betty Moore Foundation" }, { "agency": "Heising-Simons Foundation" }, { "agency": "R. Simperman" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Schreiber-Laura", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-Dirk", "name": { "family": "Schmidt", "given": "Dirk" } }, { "id": "Vernet-Elise", "name": { "family": "Vernet", "given": "Elise" } } ] }, "doi": "10.1117/12.2560017", "primary_object": { "basename": "114480E.pdf", "url": "https://authors.library.caltech.edu/records/y39mc-9jg33/files/114480E.pdf" }, "resource_type": "book_section", "pub_year": "2020", "author_list": "Wizinowich, P.; Chin, J.; et el." }, { "id": "https://authors.library.caltech.edu/records/5zq13-skd02", "eprint_id": 107298, "eprint_status": "archive", "datestamp": "2023-08-20 00:57:57", "lastmod": "2024-01-15 21:19:37", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "Jacques-Robert" }, "orcid": "0000-0001-8953-1008" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri P." }, "orcid": "0000-0002-8895-4735" }, { "id": "Wallace-James-Kent", "name": { "family": "Wallace", "given": "J. Kent" } }, { "id": "Bartos-Randall-D", "name": { "family": "Bartos", "given": "Randall D." } }, { "name": { "family": "Cetre", "given": "Sylvain" } }, { "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "name": { "family": "Ragland", "given": "Sam" }, "orcid": "0000-0002-0696-1780" }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason" }, "orcid": "0000-0003-0774-6502" }, { "id": "Ruffio-Jean-Baptiste", "name": { "family": "Ruffio", "given": "Jean Baptist" }, "orcid": "0000-0003-2233-4821" }, { "name": { "family": "Lilley", "given": "Scott" } }, { "name": { "family": "Wetherell", "given": "Edward" } }, { "name": { "family": "Doppmann", "given": "Greg" } }, { "name": { "family": "Fitzgerald", "given": "Michael" }, "orcid": "0000-0002-0176-8973" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Shofield-Tobias", "name": { "family": "Shofield", "given": "Tobias" } }, { "id": "Calvin-Benjamin-A", "name": { "family": "Calvin", "given": "Benjamin" } }, { "name": { "family": "Morris", "given": "Evan" } }, { "id": "Pezzato-Jacklyn", "name": { "family": "Pezzato", "given": "Jacklyn" } }, { "id": "Llop-Sayson-J-D", "name": { "family": "Llop Sayson", "given": "Jorge" } }, { "name": { "family": "Magnone", "given": "Ken" } }, { "name": { "family": "Johnson", "given": "Chris" } }, { "name": { "family": "Shohn", "given": "Jiman" } }, { "name": { "family": "Bond", "given": "Charlotte Z." } }, { "name": { "family": "Chun", "given": "Mark" }, "orcid": "0000-0002-8462-0703" }, { "name": { "family": "Suominen", "given": "Nick" } }, { "name": { "family": "Skemer", "given": "Andy" }, "orcid": "0000-0001-6098-3924" } ] }, "title": "The Keck Planet Imager and Characterizer: A dedicated single-mode fiber injection unit for high resolution exoplanet spectroscopy", "ispublished": "unpub", "full_text_status": "public", "keywords": "Instrumentation, W. M. Keck Observatory, Exoplanets, High contrast imaging, High dispersion coronagraphy, High resolution spectroscopy", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was supported by the Heising-Simons Foundation through grant #2019-1312. W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration (NASA). The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - 114471P.pdf
Submitted - 2107.12556.pdf
", "abstract": "The Keck Planet Imager and Characterizer (KPIC) is a purpose-built instrument to demonstrate new tech- nological and instrumental concepts initially developed for the exoplanet direct imaging field. Located downstream of the current Keck II adaptive optic system, KPIC contains a fiber injection unit (FIU) capable of combining the high-contrast imaging capability of the adaptive optic system with the high dispersion spectroscopy capability of the current Keck high resolution infrared spectrograph (NIRSPEC). Deployed at Keck in September 2018, this instrument has already been used to acquire high resolution spectra (R < 35, 000) of multiple targets of interest. In the near term, it will be used to spectrally characterize known directly imaged exoplanets and low-mass brown dwarf companions visible in the northern hemisphere with a spectral resolution high enough to enable spin and planetary radial velocity measurements as well as Doppler imaging of atmospheric weather phenomena. Here we present the design of the FIU, the unique calibration procedures needed to operate a single-mode fiber instrument and the system performance.", "date": "2020-12-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 114471P", "id_number": "CaltechAUTHORS:20210104-152311891", "isbn": "9781510636811", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VIII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210104-152311891", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation", "grant_number": "2019-1312" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Evans-Christopher-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Bryant-Julia-J", "name": { "family": "Bryant", "given": "Julia J." } }, { "id": "Motohara-Kentaro", "name": { "family": "Motohara", "given": "Kentaro" } } ] }, "doi": "10.1117/12.2562836", "primary_object": { "basename": "114471P.pdf", "url": "https://authors.library.caltech.edu/records/5zq13-skd02/files/114471P.pdf" }, "related_objects": [ { "basename": "2107.12556.pdf", "url": "https://authors.library.caltech.edu/records/5zq13-skd02/files/2107.12556.pdf" } ], "resource_type": "book_section", "pub_year": "2020", "author_list": "Delorme, Jacques-Robert; Jovanovic, Nemanja; et el." }, { "id": "https://authors.library.caltech.edu/records/6y83w-p3z28", "eprint_id": 107137, "eprint_status": "archive", "datestamp": "2023-08-20 00:54:00", "lastmod": "2024-01-15 18:16:02", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Chisholm-Eric-M", "name": { "family": "Chisholm", "given": "Eric M." } }, { "id": "Larkin-James-E", "name": { "family": "Larkin", "given": "James E." }, "orcid": "0000-0001-7687-3965" }, { "id": "Wright-Shelley-A", "name": { "family": "Wright", "given": "Shelley A." }, "orcid": "0000-0003-1034-8054" }, { "id": "Miles-John-W", "name": { "family": "Miles", "given": "John" } }, { "id": "Liu-Fengchuan", "name": { "family": "Liu", "given": "Fengchuan" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Thirty Meter Telescope: A status update on the first light instruments and the path beyond into early light instruments", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2020 SPIE.", "abstract": "This paper presents an overview of the suite of science instruments envisioned for the Thirty Meter Telescope. Specifically, the we'll explore the evolution within our first light and first decade instruments.", "date": "2020-12-13", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 114471V", "id_number": "CaltechAUTHORS:20201216-152240176", "isbn": "9781510636811", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VIII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20201216-152240176", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Thirty-Meter-Telescope" } ] }, "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Bryant-J-J", "name": { "family": "Bryant", "given": "Julia J." } }, { "id": "Motohara-Kentaro", "name": { "family": "Motohara", "given": "Kentaro" } } ] }, "doi": "10.1117/12.2559576", "resource_type": "book_section", "pub_year": "2020", "author_list": "Chisholm, Eric M.; Larkin, James E.; et el." }, { "id": "https://authors.library.caltech.edu/records/7k36a-36n04", "eprint_id": 107342, "eprint_status": "archive", "datestamp": "2023-08-20 00:58:17", "lastmod": "2024-01-15 21:19:45", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Llop-Sayson-Jorge-D", "name": { "family": "Llop-Sayson", "given": "Jorge" } }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Morrissey-Grady", "name": { "family": "Morrissey", "given": "Grady" } }, { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Wavefront control experiments with a single mode fiber at the High-Contrast Spectroscopy Testbed for Segmented Telescopes (HCST)", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, Exoplanets, Wavefront Control, Wavefront Sensing, Spectroscopy", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was partially supported by the National Science Foundation AST-ATI Grant 1710210.\n\nPublished - 114432Q.pdf
", "abstract": "Achieving high levels of contrast over broad bandwidths with segmented aperture telescopes is a key requirement to maximize the scientific yield for future exoplanet imaging missions and ground-based extremely large telescopes. The High-Contrast Spectroscopy Testbed for Segmented Telescopes (HCST) in the Exoplanet Technology Laboratory (ET Lab) at Caltech is designed to proof test new technologies aimed at tackling some of the most pressing and challenging goals of exoplanet science, namely the imaging and spectroscopic characterization of small planets across a wide range of stellar host types, including temperature Earth-size planets. Here we report on the status of a key milestone: Demonstration of 20% bandwidth nulling experiments using single mode fibers wavefront control.", "date": "2020-12-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 114432Q", "id_number": "CaltechAUTHORS:20210106-103901413", "isbn": "9781510636736", "book_title": "Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210106-103901413", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1710210" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Makenzie-Lystrup", "name": { "family": "Lystrup", "given": "Makenzie" } }, { "id": "Perrin-Marshall-D", "name": { "family": "Perrin", "given": "Marshall D." } }, { "id": "Batalha-Natalie-M", "name": { "family": "Batalha", "given": "Natalie M." } }, { "id": "Siegler-Nicholas", "name": { "family": "Siegler", "given": "Nicholas" } }, { "id": "Tong-Edward-C", "name": { "family": "Tong", "given": "Edward C." } } ] }, "doi": "10.1117/12.2562973", "primary_object": { "basename": "114432Q.pdf", "url": "https://authors.library.caltech.edu/records/7k36a-36n04/files/114432Q.pdf" }, "resource_type": "book_section", "pub_year": "2020", "author_list": "Llop-Sayson, Jorge; Jovanovic, Nemanja; et el." }, { "id": "https://authors.library.caltech.edu/records/hj4ph-s2x41", "eprint_id": 107648, "eprint_status": "archive", "datestamp": "2023-08-20 00:42:41", "lastmod": "2024-01-15 21:20:52", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Millar-Blanchaer-Maxwell-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell A." }, "orcid": "0000-0001-6205-9233" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Tinyanont-Samaporn", "name": { "family": "Tinyanont", "given": "Samaporn" }, "orcid": "0000-0002-1481-4676" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri P." }, "orcid": "0000-0002-8895-4735" }, { "id": "Vasisht-Gautam", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" }, { "id": "Milburn-Jennifer-W", "name": { "family": "Milburn", "given": "Jennifer W." } }, { "id": "Serabyn-Eugene", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Porter-Michael-D", "name": { "family": "Porter", "given": "Michael" }, "orcid": "0000-0003-3168-5586" }, { "id": "Palatnick-Skyler", "name": { "family": "Palatnick", "given": "Skyler" } } ] }, "title": "WIRC-POL: 0.1% polarimetric precision on-sky with the installation of a HWP modulator", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nPublished - SPIE-AS20-8e4f6a5e-4d06-ea11-813d-005056be4d05.pdf
", "abstract": "WIRC+Pol is a J and H-band linear spectropolarimetric mode for the prime-focus WIRC camera at the Palomar 200-inch Hale telescope. The mode is enabled by a split-pupil polarization grating that allows for the simultaneous measurement of Stokes Q and U without the use of a modulator at a seeing-limited spectral resolving power of ~100. To overcome time-dependent instrumental polarization effects that limited the calibration of instrumental polarization to a ~1% level, in February 2019 we installed a linear polarizer and half-wave plate modulator in front of the instrument, both of which are rotatable. With these two new optics, we are now able to calibrate the instrumental polarization to less than 0.1%. Here we report on WIRC+Pol's post-upgrade on-sky performance, including a polarimetric instrument model that we characterize as a function of time and focal-plane location.", "date": "2020-12", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 114475Y", "id_number": "CaltechAUTHORS:20210122-074904083", "isbn": "9781510636811", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VIII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210122-074904083", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Evans-Christopher-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Bryant-Julia-J", "name": { "family": "Bryant", "given": "Julia J." } }, { "id": "Motohara-Kentaro", "name": { "family": "Motohara", "given": "Kentaro" } } ] }, "doi": "10.1117/12.2562762", "primary_object": { "basename": "SPIE-AS20-8e4f6a5e-4d06-ea11-813d-005056be4d05.pdf", "url": "https://authors.library.caltech.edu/records/hj4ph-s2x41/files/SPIE-AS20-8e4f6a5e-4d06-ea11-813d-005056be4d05.pdf" }, "resource_type": "book_section", "pub_year": "2020", "author_list": "Millar-Blanchaer, Maxwell A.; Jovanovic, Nemanja; et el." }, { "id": "https://authors.library.caltech.edu/records/nqkrh-0jg54", "eprint_id": 107089, "eprint_status": "archive", "datestamp": "2023-08-19 22:45:55", "lastmod": "2023-10-23 15:30:51", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Johnston-Benjamin-J", "name": { "family": "Johnston", "given": "Benjamin F." } }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Gross-Simon", "name": { "family": "Gross", "given": "Simon" }, "orcid": "0000-0001-5130-183X" }, { "id": "Serabyn-Eugene", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Martin-Stefan-R", "name": { "family": "Martin", "given": "Stefan" } }, { "id": "Withford-Michael-J", "name": { "family": "Withford", "given": "Michael J." } } ] }, "title": "Ultrafast laser inscription of volume phase optics: Towards a scalar vortex mask for broadband coronagraphy", "ispublished": "unpub", "full_text_status": "restricted", "note": "\u00a9 2020 The Author(s). \n\nThis work was performed in part at the OptoFab node of the Australian National Fabrication Facility, utilizing NCRIS and NSW State Gov. Support.", "abstract": "We report on an investigation using ultrafast laser inscription in borosilicate glasses to create in-volume phase optics. An application of an optic fashioned in this way is discussed in the context of broadband \"scalar vortex coronagraphy\" for astronomical imaging.", "date": "2020-08", "date_type": "published", "publisher": "Optical Society of America", "place_of_pub": "Washington, DC", "pagerange": "Art. No. P1_11", "id_number": "CaltechAUTHORS:20201215-141036300", "isbn": "9780646825045", "book_title": "2020 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20201215-141036300", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Department of Education (Australia)" }, { "agency": "New South Wales" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1364/cleopr.2020.p1_11", "resource_type": "book_section", "pub_year": "2020", "author_list": "Johnston, Benjamin F.; Jovanovic, Nemanja; et el." }, { "id": "https://authors.library.caltech.edu/records/4dwzm-sw752", "eprint_id": 101711, "eprint_status": "archive", "datestamp": "2023-08-19 20:27:33", "lastmod": "2024-01-14 22:08:24", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "N." } }, { "id": "Cvetojevic-N", "name": { "family": "Cvetojevic", "given": "N." } }, { "id": "Daal-M", "name": { "family": "Daal", "given": "M." }, "orcid": "0000-0002-1134-2116" }, { "id": "Mazin-B-A", "name": { "family": "Mazin", "given": "B." } }, { "id": "Moreira-R", "name": { "family": "Moreira", "given": "R." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "G." }, "orcid": "0000-0002-1871-6264" }, { "id": "Beichman-C-A", "name": { "family": "Beichman", "given": "C." }, "orcid": "0000-0002-5627-5471" }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "K." } }, { "id": "Jewell-Jeffrey-B", "name": { "family": "Jewell", "given": "J." } }, { "id": "Leifer-Stephanie-D", "name": { "family": "Leifer", "given": "S." }, "orcid": "0000-0002-8980-7825" }, { "id": "Dekany-R-G", "name": { "family": "Dekany", "given": "R." } }, { "id": "Porter-M", "name": { "family": "Porter", "given": "M." } } ] }, "title": "Status and future developments of integrated photonic spectrographs for astronomy and Earth and planetary sciences", "ispublished": "unpub", "full_text_status": "public", "keywords": "Integrated photonic spectrographs, arrayed waveguide gratings, astronomy, astronomical instruments, miniturization", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nN. Cvetojevic acknowledges funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement CoG-683029).\n\nPublished - 112870K.pdf
", "abstract": "The size and cost of astronomical instruments for extremely large telescopes (ELTs), are pushing the limits of what is feasible, requiring optical components at the very edge of achievable size and performance. Operating at the diffraction-limit, the realm of photonic technologies, allows for highly compact instruments to be realized. In particular, Integrated Photonic Spectrographs (IPSs) have the potential to replace an instrument the size of a car with one that can be held in the palm of a hand. This miniaturization in turn offers dramatic improvements in mechanical and thermal stability. Owing to the single-mode fiber feed, the performance of the spectrograph is decoupled from the telescope and the instruments point spread function can be calibrated with a much higher precision. These effects combined mean that an IPS can provide superior performance with respect to a classical bulk optic spectrograph. In this paper we provide a summary of efforts made to qualify IPSs for astronomical applications to date. These include the early characterization of arrayed waveguide gratings for multi-object injection and modifications to facilitate a continuous spectrum, to the integration of these devices into prototypical instruments and most recently the demonstration of a highly optimized instrument directly fed from an 8-m telescope. We will then outline development paths necessary for astronomy, currently underway, which include broadening operating bands, bandwidth, increasing resolution, implementing cross-dispersion on-chip and integrating these devices with other photonic technologies and detectors such as superconducting Microwave Kinetic Inductance Detector arrays. Although the focus of this work is on IPS applicability to astronomy, they may be even more ideally suited to Earth and planetary science applications.", "date": "2020-03-02", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 112870K", "id_number": "CaltechAUTHORS:20200304-112715346", "isbn": "9781510633377", "book_title": "Photonic Instrumentation Engineering VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200304-112715346", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "683029" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" } ] }, "contributors": { "items": [ { "id": "Soskind-Y", "name": { "family": "Soskind", "given": "Yakov" } }, { "id": "Busse-L-E", "name": { "family": "Busse", "given": "Lynda E." } } ] }, "doi": "10.1117/12.2546959", "primary_object": { "basename": "112870K.pdf", "url": "https://authors.library.caltech.edu/records/4dwzm-sw752/files/112870K.pdf" }, "resource_type": "book_section", "pub_year": "2020", "author_list": "Jovanovic, N.; Cvetojevic, N.; et el." }, { "id": "https://authors.library.caltech.edu/records/2cdcv-z7f86", "eprint_id": 98614, "eprint_status": "archive", "datestamp": "2023-08-19 17:49:50", "lastmod": "2024-01-14 21:56:36", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Zhang-Manxuan", "name": { "family": "Zhang", "given": "Manxuan" } }, { "id": "Llop-Sayson-J-D", "name": { "family": "Llop Sayson", "given": "Jorge" } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Xin-Yeyuan", "name": { "family": "Xin", "given": "Yeyuan" } } ] }, "title": "Novel implementation of a Kalman filter for speckle nulling with a fiber injection unit", "ispublished": "unpub", "full_text_status": "public", "keywords": "Vortex Coronagraph, Fiber Injection Unit, Speckle Nulling, Kalman Filter, Spectrograph, Exoplanet Characterization, Starlight-Suppression, High-Contrast Imaging", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nPublished - 111171X.pdf
", "abstract": "High dispersion coronagraphy (HDC) is a technique that combines high contrast imaging techniques with high spectral resolution spectroscopy to directly characterize exoplanets and provide key information such as chemical composition, temperature, and rotational velocity. A consequence of adaptive optics systems used in direct imaging is the formation of residual bright spots of star lights, called speckles, in the final image. Due to the large difference in brightness between host stars and their planets, these speckles can easily obscure potential exoplanets. In a previous demonstration, it was shown that using monochromatic light and a fiber injection unit (FIU), simulated exoplanet light can be directed to a high-resolution spectrograph. The method had speckle suppression that exceeding conventional image-based speckle nulling. With a previous Kalman filter estimator implementation, we found that with the implementation of the algorithm, speckle suppression was even more stable and outperformed traditional speckle nulling. In this update to the estimator, progress has been made in terms of a new filter design, and better estimates of the physical parameters in the laboratory, resulting in a higher speckle nulling performance.", "date": "2019-09-10", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 111171X", "id_number": "CaltechAUTHORS:20190912-132937281", "isbn": "9781510629271", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190912-132937281", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.2530756", "primary_object": { "basename": "111171X.pdf", "url": "https://authors.library.caltech.edu/records/2cdcv-z7f86/files/111171X.pdf" }, "resource_type": "book_section", "pub_year": "2019", "author_list": "Zhang, Manxuan; Llop Sayson, Jorge; et el." }, { "id": "https://authors.library.caltech.edu/records/d236r-4v623", "eprint_id": 98616, "eprint_status": "archive", "datestamp": "2023-08-19 17:46:44", "lastmod": "2024-01-14 21:56:40", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Coker-C-T", "name": { "family": "Coker", "given": "Carl T." }, "orcid": "0000-0002-9954-7887" }, { "id": "Llop-Sayson-J-D", "name": { "family": "Llop Sayson", "given": "Jorge" } }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } }, { "id": "Riggs-A-J-E", "name": { "family": "Riggs", "given": "A. J. E." }, "orcid": "0000-0002-0863-6228" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" } ] }, "title": "A multi-object spectrograph using single-mode fibers with a coronagraph: progress towards laboratory results on the high-contrast testbed for segmented telescopes", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was performed at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. This work was supported by an appointment to the NASA Postdoctoral Program at the Jet Propulsion Laboratory, administered by the Universities Space Research Association under contract with NASA. Copyright 2019 California Institute of Technology. Government Sponsorship acknowledged. All rights reserved.\n\nPublished - 111171A.pdf
", "abstract": "Using single-mode fibers (SMFs) in the image plane of coronagraphs allows access to a new wavefront control regime. By using deformable mirrors to create a mismatch between the incoming starlight and the fiber mode, SMFs can serve as integral parts of the light suppression ability of the coronagraph. Previous promising simulation results show increased spectral bandwidth and throughput when using SMFs in a multi-object role, and previous laboratory results have shown increased light suppression using a single SMF. We present an update on efforts to combine a multi-core SMF with a high-resolution spectrograph on the High Contrast Testbed for Segmented Telescopes (HCST) at Caltech. We present our planned experimental design, as well as simulations of expected performance when controlling multiple fiber cores on HCST. We will test the potential increase in spectral bandpass and throughput resulting from the switch to SMFs, as well as the stability of the wavefront control solution.", "date": "2019-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 111171A", "id_number": "CaltechAUTHORS:20190912-134333478", "isbn": "9781510629271", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190912-134333478", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "NASA Postdoctoral Program" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.2528569", "primary_object": { "basename": "111171A.pdf", "url": "https://authors.library.caltech.edu/records/d236r-4v623/files/111171A.pdf" }, "resource_type": "book_section", "pub_year": "2019", "author_list": "Coker, Carl T.; Llop Sayson, Jorge; et el." }, { "id": "https://authors.library.caltech.edu/records/6rhqy-28c40", "eprint_id": 98619, "eprint_status": "archive", "datestamp": "2023-08-19 17:47:05", "lastmod": "2024-01-14 21:56:46", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Jensen-Clem-R-M", "name": { "family": "Jensen-Clem", "given": "Rebecca" }, "orcid": "0000-0003-0054-2953" }, { "id": "Bond-C-Z", "name": { "family": "Bond", "given": "Charlotte Z." } }, { "id": "Cetre-S", "name": { "family": "Cetre", "given": "Sylvain" } }, { "id": "McEwen-E", "name": { "family": "McEwen", "given": "Eden" } }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "id": "Ragland-S", "name": { "family": "Ragland", "given": "Sam" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Graham-J-R", "name": { "family": "Graham", "given": "James" } } ] }, "title": "Demonstrating predictive wavefront control with the Keck II near-infrared pyramid wavefront sensor", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanets, Stars, Adaptive optics, Wavefronts, Turbulence, Coronagraphy, Point spread functions, Telescopes", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe predictive wavefront control demonstration is funded by the Heising-Simons Foundation. The authors would like to thank Marcos van Dam (Flat Wavefronts) for his suggestion to use the regularized least-squares inversion method to compute the predictive filter. The W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The near-infrared pyramid wavefront sensor is supported by the National Science Foundation under Grant No. AST-1611623. The PYWS camera was provided by Don Hall as part of his National Science Foundation funding under Grant No. AST 1106391. Support for R. J. -C. was provided by the Miller Institute for Basic Research in the Sciences. This work benefited from the NASA Nexus for Exoplanet System Science (NExSS) research coordination network sponsored by the NASA Science Mission Directorate. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - 111170W.pdf
Accepted Version - 1909.05302.pdf
", "abstract": "The success of ground-based instruments for high contrast exoplanet imaging depends on the degree to which adaptive optics (AO) systems can mitigate atmospheric turbulence. While modern AO systems typically suffer from millisecond time lags between wavefront measurement and control, predictive wavefront control (pWFC) is a means of compensating for those time lags using previous wavefront measurements, thereby improving the raw contrast in the post-coronagraphic science focal plane. A method of predictive control based on Empirical Orthogonal Functions (EOF) has previously been proposed and demonstrated on Subaru/SCExAO. In this paper we present initial tests of this method for application to the near-infrared pyramid wavefront sensor (PYWFS) recently installed in the Keck II AO system. We demonstrate the expected root-mean-square (RMS) wavefront error and contrast benefits of pWFC based on simulations, applying pWFC to on-sky telemetry data saved during commissioning of the PYWFS. We discuss how the performance varies as different temporal and spatial scales are included in the computation of the predictive filter. We further describe the implementation of EOF pWFC within the PYWFS dedicated real-time controller (RTC), and, via daytime testing at the observatory, we demonstrate the performance of pWFC in real time when pre-computed phase screens are applied to the deformable mirror (DM).", "date": "2019-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 111170W", "id_number": "CaltechAUTHORS:20190912-140620297", "isbn": "9781510629271", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190912-140620297", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation" }, { "agency": "W. M. Keck Foundation" }, { "agency": "NSF", "grant_number": "AST-1611623" }, { "agency": "NSF", "grant_number": "AST-1106391" }, { "agency": "Miller Institute for Basic Research in Science" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.2529687", "primary_object": { "basename": "111170W.pdf", "url": "https://authors.library.caltech.edu/records/6rhqy-28c40/files/111170W.pdf" }, "related_objects": [ { "basename": "1909.05302.pdf", "url": "https://authors.library.caltech.edu/records/6rhqy-28c40/files/1909.05302.pdf" } ], "resource_type": "book_section", "pub_year": "2019", "author_list": "Jensen-Clem, Rebecca; Bond, Charlotte Z.; et el." }, { "id": "https://authors.library.caltech.edu/records/3b73d-sw626", "eprint_id": 98624, "eprint_status": "archive", "datestamp": "2023-08-19 17:47:27", "lastmod": "2024-01-14 21:56:56", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Martin-S-R", "name": { "family": "Martin", "given": "Stefan" } }, { "id": "Kuan-Gary", "name": { "family": "Kuan", "given": "Gary" } }, { "id": "Stern-D", "name": { "family": "Stern", "given": "Daniel" }, "orcid": "0000-0003-2686-9241" }, { "id": "Scowen-P-A", "name": { "family": "Scowen", "given": "Paul" } }, { "id": "Krist-J-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" } ] }, "title": "Habitable Exoplanet Observatory (HabEx) telescope and optical instruments", "ispublished": "unpub", "full_text_status": "public", "keywords": "HabEx, Exoplanet, Starshade, Coronagraphy, Ultraviolet, Infrared, Spectroscopy, Imaging", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe information in this paper is provided prior to any decisions or commitments being made and is provided for planning and discussion purposes only. This work was conducted at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. Copyright 2019 California Institute of Technology. Government sponsorship acknowledged. All rights reserved.\n\nPublished - 1111704.pdf
", "abstract": "The HabEx study has developed a baseline concept for a 4 m aperture next generation space telescope operating from the ultraviolet to the infrared, capable of compelling general astrophysics and exoplanet science. HabEx carries four instruments, a UV spectrometer/imager (UVS) together with a general purpose astrophysics camera/spectrograph (HWC) and for exoplanet work, a coronagraph and a starshade. UVS reaches down to 115 nm with resolution up to 60,000 and a 3'x3' field of view. HWC operates between 370 nm and 1800 nm, again with a 3'x3' field of view; the spectral resolution is 1000 and it carries a suite of science filters. The telescope is capable of tracking both deep space and solar system objects. The coronagraph enables observations and spectroscopy at up to R=140 with instantaneous 20% bandwidth between wavelengths of 450 and 1800 nm and is intended to be used in a survey mode. However, it also backs up most of the functionality of the accompanying starshade instrument which will have superior performance for spectroscopy. The 52 m diameter starshade flies 76,600 km from the telescope and at that range has a broadband suppression of the starlight between 300 and 1000 nm. A single observation at 108% bandwidth covers a very wide spectral band at a resolution up to 140. Both coronagraph and starshade are equipped with integral field spectrometers to enable simultaneous spectroscopy of exoplanets within the field of view. This paper details the design of the telescope, the four science instruments and associated optical systems.", "date": "2019-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1111704", "id_number": "CaltechAUTHORS:20190913-070700442", "isbn": "9781510629271", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190913-070700442", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.2530737", "primary_object": { "basename": "1111704.pdf", "url": "https://authors.library.caltech.edu/records/3b73d-sw626/files/1111704.pdf" }, "resource_type": "book_section", "pub_year": "2019", "author_list": "Martin, Stefan; Kuan, Gary; et el." }, { "id": "https://authors.library.caltech.edu/records/7k605-4wj20", "eprint_id": 98610, "eprint_status": "archive", "datestamp": "2023-08-19 17:46:27", "lastmod": "2024-01-14 21:56:31", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Bond-Charlotte-Z", "name": { "family": "Bond", "given": "Charlotte Z." } }, { "id": "Cetre-Sylvain", "name": { "family": "Cetre", "given": "Sylvain" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Wallace-James-K", "name": { "family": "Wallace", "given": "James K." } }, { "id": "Bartos-Randall-D", "name": { "family": "Bartos", "given": "Randall" } }, { "id": "Lilley-Scott-J", "name": { "family": "Lilley", "given": "Scott" } }, { "id": "Ragland-Sam", "name": { "family": "Ragland", "given": "Sam" } }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Wizinowich-Peter-L", "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "id": "Chun-Mark-R", "name": { "family": "Chun", "given": "Mark" } }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason" }, "orcid": "0000-0003-0774-6502" }, { "id": "Fitzgerald-Michael-P", "name": { "family": "Fitzgerald", "given": "Michael" }, "orcid": "0000-0002-0176-8973" }, { "id": "Pezzato-Jacklyn", "name": { "family": "Pezzato", "given": "Jacklyn" } }, { "id": "Matthews-Keith-Astronomy", "name": { "family": "Matthews", "given": "Keith" } }, { "id": "Calvin-Ben", "name": { "family": "Calvin", "given": "Ben" } }, { "id": "Millar-Blanchaer-Maxwell-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell" }, "orcid": "0000-0001-6205-9233" }, { "id": "Martin-Emily-C", "name": { "family": "Martin", "given": "Emily C." }, "orcid": "0000-0002-0618-5128" }, { "id": "Wetherell-Edward", "name": { "family": "Wetherell", "given": "Edward" } }, { "id": "Wang-Eric", "name": { "family": "Wang", "given": "Eric" } }, { "id": "Jacobson-Shane-M", "name": { "family": "Jacobson", "given": "Shane" } }, { "id": "Warmbier-Eric-A", "name": { "family": "Warmbier", "given": "Eric" } }, { "id": "Lockhart-Charles", "name": { "family": "Lockhart", "given": "Charles" } }, { "id": "Hall-Don-N-B", "name": { "family": "Hall", "given": "Don" } }, { "id": "Jensen-Clem-Rebecca-M", "name": { "family": "Jensen-Clem", "given": "Rebecca" }, "orcid": "0000-0003-0054-2953" }, { "id": "McEwen-Eden", "name": { "family": "McEwen", "given": "Eden" } } ] }, "title": "Keck Planet Imager and Characterizer: demonstrating advanced exoplanet characterization techniques for future extremely large telescopes (Conference Presentation)", "ispublished": "unpub", "full_text_status": "public", "keywords": "Wavefront sensing, high contrast imaging, exoplanets, high dispersion coronography, high resolution\nspectroscopy", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe authors would like to acknowledge the financial support of the Heising-Simons foundation. We thank Dr. Rebecca Jensen-Clem for loaning AOSE for use within the KPIC phase II testbed. We would like to thank the SCExAO project for lending KPIC roof prisms for the NIR PyWFS. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA). The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nAccepted Version - 1909.04541.pdf
", "abstract": "The Keck Planet Imager and Characterizer (KPIC) is an upgrade to the Keck II adaptive optics system enabling high contrast imaging and high-resolution spectroscopic characterization of giant exoplanets in the mid-infrared (2-5 microns). The KPIC instrument will be developed in phases. Phase I entails the installation of an infrared pyramid wavefront sensor (PyWFS) based on a fast, low-noise SAPHIRA IR-APD array. The ultra-sensitive infrared PyWFS will enable high contrast studies of infant exoplanets around cool, red, and/or obscured targets in star forming regions. In addition, the light downstream of the PyWFS will be coupled into an array of single-mode fibers with the aid of an active fiber injection unit (FIU). In turn, these fibers route light to Keck's high-resolution infrared spectrograph NIRSPEC, so that high dispersion coronagraphy (HDC) can be implemented for the first time. HDC optimally pairs high contrast imaging and high-resolution spectroscopy allowing detailed characterization of exoplanet atmospheres, including molecular composition, spin measurements, and Doppler imaging. We will provide an overview of the instrument, its science scope, and report on recent results from on-sky commissioning of Phase I. We will discuss plans for optimizing the instrument to seed designs for similar modes on extremely large telescopes.", "date": "2019-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 111170T", "id_number": "CaltechAUTHORS:20190912-110942196", "isbn": "9781510629271", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190912-110942196", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.2529330", "primary_object": { "basename": "1909.04541.pdf", "url": "https://authors.library.caltech.edu/records/7k605-4wj20/files/1909.04541.pdf" }, "resource_type": "book_section", "pub_year": "2019", "author_list": "Jovanovic, Nemanja; Delorme, Jacques-Robert; et el." }, { "id": "https://authors.library.caltech.edu/records/q3gh5-tcx19", "eprint_id": 98625, "eprint_status": "archive", "datestamp": "2023-08-19 17:47:52", "lastmod": "2024-01-14 21:56:58", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Krist-John-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Martin-S-R", "name": { "family": "Martin", "given": "Stefan" } }, { "id": "Kuan-Gary", "name": { "family": "Kuan", "given": "Gary" } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Saini-N-S", "name": { "family": "Saini", "given": "Navtej" } }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John" } }, { "id": "Breckinridge-J-B", "name": { "family": "Breckinridge", "given": "James" }, "orcid": "0000-0002-9488-098X" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Stahl-P", "name": { "family": "Stahl", "given": "Philip" } }, { "id": "Davis-J", "name": { "family": "Davis", "given": "Jeffrey" } } ] }, "title": "Numerical modeling of the Habex coronagraph", "ispublished": "unpub", "full_text_status": "public", "keywords": "Habex, coronagraph", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was performed at the Jet Propulsion Laboratory/California Institute of Technology under contract to NASA. The decision to implement WFIRST will not be finalized until NASA's completion of the National Environmental Policy Act (NEPA) process. This document is being made available for information purposes only.\n\nPublished - 1111705.pdf
", "abstract": "The Habex study, commissioned by NASA in preparation for the 2020 Decadal Survey, is evaluating a 4 meter space telescope for high contrast imaging and spectral characterization of extrasolar terrestrial planets. Its off-axis configuration, active structural metrology, and low-disturbance pointing control provide an optimal system for coronagraphs. We present predictions of the Habex performance using a charge 6 vortex coronagraph that have been obtained using numerical modeling techniques developed for the WFIRST coronagraph. The models include realistic optical surface and polarization-induced aberrations, pointing jitter, and thermally-induced wavefront variations. Wavefront control using dual deformable mirrors is simulated to create a dark, high-contrast hole around the star. The results show that current technologies can closely approach the Habex performance goals, and with some additional development in key areas (e.g., deformable mirror surface quality, low-polarization coatings, etc.) over the next few years they should reliably meet them.", "date": "2019-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1111705", "id_number": "CaltechAUTHORS:20190913-072409336", "isbn": "9781510629271", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190913-072409336", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.2530462", "primary_object": { "basename": "1111705.pdf", "url": "https://authors.library.caltech.edu/records/q3gh5-tcx19/files/1111705.pdf" }, "resource_type": "book_section", "pub_year": "2019", "author_list": "Krist, John; Martin, Stefan; et el." }, { "id": "https://authors.library.caltech.edu/records/5w35b-b3793", "eprint_id": 98617, "eprint_status": "archive", "datestamp": "2023-08-19 17:46:51", "lastmod": "2024-01-14 21:56:42", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Riggs-A-J-E", "name": { "family": "Riggs", "given": "A. J. Eldorado" }, "orcid": "0000-0002-0863-6228" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } } ] }, "title": "Scalar vortex coronagraph mask design and predicted performance", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, instrumentation, exoplanets, direct detection, coronagraphs", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA).\n\nPublished - 111171F.pdf
Accepted Version - 1908.09786.pdf
", "abstract": "Vortex coronagraphs are an attractive solution for imaging exoplanets with future space telescopes due to their relatively high throughput, large spectral bandwidth, and low sensitivity to low-order aberrations compared to other coronagraphs with similar inner working angles. Most of the vortex coronagraph mask development for space applications has focused on generating a polychromatic, vectorial, optical vortex using multiple layers of liquid crystal polymers. While this approach has been the most successful thus far, current fabrication processes achieve retardance errors of 0.1-1.0\u00b0, which causes a nonnegligible fraction of the starlight to leak through the coronagraph. Circular polarizers are typically used to reject the stellar leakage reducing the throughput by a factor of two. Vector vortex masks also complicate wavefront control because they imprint conjugated phase ramps on the orthogonal circular polarization components, which may need to be split in order to properly sense and suppress the starlight. Scalar vortex masks can potentially circumvent these limitations by applying the same phase shift to all incident light regardless of the polarization state and thus have the potential to significantly improve the performance of vortex coronagraphs. We present scalar vortex coronagraph designs that make use of focal plane masks with multiple layers of dielectrics that (a) produce phase patterns that are relatively friendly to standard manufacturing processes and (b) achieve sufficient broadband starlight suppression, in theory, for imaging Earth-like planets with future space telescopes.", "date": "2019-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 111171F", "id_number": "CaltechAUTHORS:20190912-135301575", "isbn": "9781510629271", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190912-135301575", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.2528625", "primary_object": { "basename": "111171F.pdf", "url": "https://authors.library.caltech.edu/records/5w35b-b3793/files/111171F.pdf" }, "related_objects": [ { "basename": "1908.09786.pdf", "url": "https://authors.library.caltech.edu/records/5w35b-b3793/files/1908.09786.pdf" } ], "resource_type": "book_section", "pub_year": "2019", "author_list": "Ruane, Garreth; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.edu/records/t7393-rqr30", "eprint_id": 98618, "eprint_status": "archive", "datestamp": "2023-08-19 17:46:58", "lastmod": "2024-01-14 21:56:44", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Pezzato-Jacklyn", "name": { "family": "Pezzato", "given": "Jacklyn" } }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason" }, "orcid": "0000-0003-0774-6502" }, { "id": "Wallace-James-K", "name": { "family": "Wallace", "given": "James K." } }, { "id": "Colborn-Jennah-K", "name": { "family": "Colborn", "given": "Jennah K." } }, { "id": "Cetre-Sylvain", "name": { "family": "Cetre", "given": "Sylvain" } }, { "id": "Bond-Charlotte-Z", "name": { "family": "Bond", "given": "Charlotte Z." } }, { "id": "Bartos-Randall-D", "name": { "family": "Bartos", "given": "Randall" } }, { "id": "Calvin-Benjamin-A", "name": { "family": "Calvin", "given": "Benjamin" } }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Jensen-Clem-Rebecca-M", "name": { "family": "Jensen-Clem", "given": "Rebecca" }, "orcid": "0000-0003-0054-2953" }, { "id": "McEwen-Eden", "name": { "family": "McEwen", "given": "Eden" } }, { "id": "Lilley-Scott-J", "name": { "family": "Lilley", "given": "Scott" } }, { "id": "Wetherell-Edward", "name": { "family": "Wetherell", "given": "Ed" } }, { "id": "Wizinowich-Peter-L", "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" } ] }, "title": "Status of the Keck Planet Imager and Characterizer phase II development", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanets, high contrast imaging, high contrast high resolution spectroscopy, small inner working angle coronagraphy, vortex coronagraph, on-axis segmented telescopes, apodization", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe authors would like to acknowledge the financial support of the Heising-Simons foundation. We thank Dr. Rebecca Jensen-Clem for loaning AOSE for use within the KPIC phase II testbed. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA).\n\nPublished - 111170U.pdf
Accepted Version - 1909.06487.pdf
", "abstract": "The Keck Planet Imager and Characterizer comprises of a series of upgrades to the Keck II adaptive optics system and instrument suite to improve the direct imaging and high resolution spectroscopy capabilities of the facility instruments NIRC2 and NIRSPEC, respectively. Phase I of KPIC includes a NIR pyramid wavefront sensor and a Fiber Injection Unit (FIU) to feed NIRSPEC with a single mode fiber, which have already been installed and are currently undergoing commissioning. KPIC will enable High Dispersion Coronagraphy (HDC) of directly imaged exoplanets for the first time, providing potentially improved detection significance and spectral characterization capabilities compared to direct imaging. In favorable cases, Doppler imaging, spin measurements, and molecule mapping are also possible. This science goal drives the development of phase II of KPIC, which is scheduled to be deployed in early 2020. Phase II optimizes the system throughput and contrast using a variety of additional submodules, including a 952 element deformable mirror, phase induced amplitude apodization lenses, an atmospheric dispersion compensator, multiple coronagraphs, a Zernike wavefront sensor, and multiple science ports. A testbed is being built in the Exoplanet Technology Lab at Caltech to characterize and test the design of each of these submodules before KPIC phase II is deployed to Keck. This paper presents an overview of the design of phase II and report on results from laboratory testing.", "date": "2019-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 111170U", "id_number": "CaltechAUTHORS:20190912-135826007", "isbn": "9781510629271", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190912-135826007", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-Stuart-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.2529685", "primary_object": { "basename": "111170U.pdf", "url": "https://authors.library.caltech.edu/records/t7393-rqr30/files/111170U.pdf" }, "related_objects": [ { "basename": "1909.06487.pdf", "url": "https://authors.library.caltech.edu/records/t7393-rqr30/files/1909.06487.pdf" } ], "resource_type": "book_section", "pub_year": "2019", "author_list": "Pezzato, Jacklyn; Jovanovic, Nemanja; et el." }, { "id": "https://authors.library.caltech.edu/records/jr92c-qhh72", "eprint_id": 98609, "eprint_status": "archive", "datestamp": "2023-08-19 17:46:22", "lastmod": "2024-01-14 21:56:29", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Morgan-R-M", "name": { "family": "Morgan", "given": "Rhonda M." } }, { "id": "Warfield-K-R", "name": { "family": "Warfield", "given": "Keith" } }, { "id": "Stahl-H-P", "name": { "family": "Stahl", "given": "H. P." } }, { "id": "Kuan-Gary", "name": { "family": "Kuan", "given": "Gary" } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Nikzad-S", "name": { "family": "Nikzad", "given": "Shouleh" } }, { "id": "Azizi-A", "name": { "family": "Azizi", "given": "Alireza" } }, { "id": "Balasubramanian-B", "name": { "family": "Balasubramanian", "given": "Bala" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Redding-D-C", "name": { "family": "Redding", "given": "David C." } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } }, { "id": "Hennessy-J-J", "name": { "family": "Hennessy", "given": "John J." } }, { "id": "Warwick-S", "name": { "family": "Warwick", "given": "Steve" } } ] }, "title": "Technology maturity update for the Habitable-zone Exoplanet Imaging Observatory (HabEx) concept (Conference Presentation)", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE).", "abstract": "Since the 2010 Decadal Survey, the technologies needed for direct imaging of exoplanets advanced significantly. NASA investment in these technologies, prioritized in the 2010 Decadal Survey, have ripened to a maturity to enable direct imaging of earthlike exoplanets. For the first time since the discovery of exoplanets, a direct imaging mission can be conceived to start in less than ten years, possibly as soon as five years. The HabEx Observatory Concept design utilizes technologies that are state of the art or near to state of the art with clear paths of development. The philosophy of the design favors as high a Technology Readiness Level (TRL) as possible to minimize risk. We discuss the HabEx technology challenges and assess the TRL expected by the submission of the Final Report in 2019. Many of the enabling technologies are at, or expected to be at, TRL 5 by 2019, and the remaining technologies are at TRL 4. We update the technology maturity roadmap with technology advances in the past year and expand it to include an Architecture option which is a 3.2 m diameter on-axis segmented aperture with a starshade only. The starshade suppresses starlight before it enters the telescope, allowing the telescope optical performance and stability to be significantly looser than for a coronagraph, thus enabling a segmented primary mirror design that can meet stability requirements with minimal advancement from the state of the art. We assess the exoplanet-driven technologies of HabEx, including starshades, coronagraphs, deformable mirrors, wavefront control, 4 m aperture mirrors, jitter mitigation, segmented mirror stability, and low-noise detectors.", "date": "2019-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 111150N", "id_number": "CaltechAUTHORS:20190912-105758259", "isbn": "9781510629233", "book_title": "UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190912-105758259", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Barto-A-A", "name": { "family": "Barto", "given": "Allison A." } }, { "id": "Breckinridge-J-B", "name": { "family": "Breckinridge", "given": "James B." } }, { "id": "Stahl-H-P", "name": { "family": "Stahl", "given": "H. Philip" } } ] }, "doi": "10.1117/12.2529766", "resource_type": "book_section", "pub_year": "2019", "author_list": "Morgan, Rhonda M.; Warfield, Keith; et el." }, { "id": "https://authors.library.caltech.edu/records/3eh0f-wvq92", "eprint_id": 98620, "eprint_status": "archive", "datestamp": "2023-08-19 17:47:09", "lastmod": "2024-01-14 21:56:48", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Llop-Sayson-J-D", "name": { "family": "Llop-Sayson", "given": "Jorge" } }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Riggs-A-J-E", "name": { "family": "Riggs", "given": "A. J. Eldorado" }, "orcid": "0000-0002-0863-6228" }, { "id": "Coker-C-T", "name": { "family": "Coker", "given": "Carl T." }, "orcid": "0000-0002-9954-7887" }, { "id": "Morrissey-G", "name": { "family": "Morrissey", "given": "Grady" } }, { "id": "Sun-He", "name": { "family": "Sun", "given": "He" } } ] }, "title": "The high-contrast spectroscopy testbed for segmented telescopes (HCST): new wavefront control demonstrations", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, Exoplanets, Wavefront Control, Wavefront Sensing, Spectroscopy", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was partially supported by the National Science Foundation AST-ATI Grant 1710210.\n\nPublished - 111171W.pdf
", "abstract": "The High-Contrast Spectroscopy Testbed for Segmented Telescopes (HCST) in the Exoplanet Technology Laboratory (ET Lab) at Caltech is designed to test the technologies that will enable direct imaging and characterization of exoplanets with future segmented ground- and space-based telescopes. Wavefront sensing and control has been successfully implemented with electric field conjugation (EFC) using the FALCO Matlab package, yielding a baseline raw contrast of 1\u00d710^(-8) in narrowband light with a Vector Vortex Coronagraph over a clear aperture. Here we report on progress towards our next HCST milestones: 1- Demonstration of 10^(-8) raw contrast levels in broadband light with the apodized vortex coronagraph using a LUVOIR B-like segmented aperture. 2- Integration of a fiber injection unit (FIU) and corresponding wavefront control algorithm to achieve 10^(-8) raw contrast in broadband light through a single mode fiber enabling high dispersion coronagraphy.", "date": "2019-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 111171W", "id_number": "CaltechAUTHORS:20190912-141317978", "isbn": "9781510629271", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190912-141317978", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1710210" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.2530670", "primary_object": { "basename": "111171W.pdf", "url": "https://authors.library.caltech.edu/records/3eh0f-wvq92/files/111171W.pdf" }, "resource_type": "book_section", "pub_year": "2019", "author_list": "Llop-Sayson, Jorge; Ruane, Garreth; et el." }, { "id": "https://authors.library.caltech.edu/records/gd7fh-4t086", "eprint_id": 98621, "eprint_status": "archive", "datestamp": "2023-08-19 17:47:16", "lastmod": "2024-01-14 21:56:50", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Hayama-Thomas", "name": { "family": "Hayama", "given": "Thomas" } }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Pezzato-Jacklyn", "name": { "family": "Pezzato", "given": "Jacklyn" } }, { "id": "Bond-Charlotte-Z", "name": { "family": "Bond", "given": "Charlotte Z." } }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason" }, "orcid": "0000-0003-0774-6502" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Wallace-J-Kent", "name": { "family": "Wallace", "given": "J. Kent" }, "orcid": "0000-0001-5299-6899" }, { "id": "Serabyn-Eugene", "name": { "family": "Serabyn", "given": "Eugene" } } ] }, "title": "The vortex fiber nulling mode of the Keck Planet Imager and Characterizer (KPIC)", "ispublished": "unpub", "full_text_status": "public", "keywords": "Instrumentation, exoplanets, nulling interferometry", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nPart of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA).\n\nPublished - 111170V.pdf
Accepted Version - 1909.03538.pdf
", "abstract": "The Keck Planet Imager and Characterizer (KPIC) is an upgrade to the Keck II adaptive optics system that includes an active fiber injection unit (FIU) for efficiently routing light from exoplanets to NIRSPEC, a high-resolution spectrograph. Towards the end of 2019, we will add a suite of new coronagraph modes as well as a\nhigh-order deformable mirror. One of these modes, operating in K-band (2.2 \u00b5m), will be the first vortex fiber nuller to go on sky. Vortex Fiber Nulling (VFN) is a new interferometric method for suppressing starlight in order to spectroscopically characterize exoplanets at angular separations that are inaccessible with conventional coronagraph systems. A monochromatic starlight suppression of 6 x 10^(-5) in 635 nm laser light has already been demonstrated on a VFN testbed in the lab. A polychromatic experiment is now underway and coupling efficiencies of < 5 x 10^(-4) and ~5% have been demonstrated for the star and planet respectively in 10% bandwidth light. Here we describe those experiments, the new KPIC VFN mode, and the expected performance of this mode using realistic parameters determined from on-sky tests done during the KPIC commissioning.", "date": "2019-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 111170V", "id_number": "CaltechAUTHORS:20190912-141939947", "isbn": "9781510629271", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190912-141939947", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-Stuart-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.2528529", "primary_object": { "basename": "111170V.pdf", "url": "https://authors.library.caltech.edu/records/gd7fh-4t086/files/111170V.pdf" }, "related_objects": [ { "basename": "1909.03538.pdf", "url": "https://authors.library.caltech.edu/records/gd7fh-4t086/files/1909.03538.pdf" } ], "resource_type": "book_section", "pub_year": "2019", "author_list": "Echeverri, Daniel; Ruane, Garreth; et el." }, { "id": "https://authors.library.caltech.edu/records/5cpb4-njs34", "eprint_id": 98623, "eprint_status": "archive", "datestamp": "2023-08-19 17:47:23", "lastmod": "2024-01-14 21:56:54", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. Kent" } }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason" }, "orcid": "0000-0003-0774-6502" }, { "id": "Batalha-N-M", "name": { "family": "Batalha", "given": "Natasha" } } ] }, "title": "Vortex fiber nulling for exoplanet observations: conceptual design, theoretical performance, and initial scientific yield predictions", "ispublished": "unpub", "full_text_status": "public", "keywords": "Instrumentation, exoplanets, interferometry", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA). This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with NASA under the Exoplanet Exploration Program.\n\nPublished - 1111716.pdf
Accepted Version - 1908.09780.pdf
", "abstract": "Vortex fiber nulling (VFN) is a method that may enable the detection and characterization of exoplanets at small angular separations (0.5-2 \u03bb/D) with ground- and space-based telescopes. Since the field of view is within the inner working angle of most coronagraphs, nulling accesses non-transiting planets that are otherwise too close to their star for spectral characterization by other means, thereby significantly increasing the number of known exoplanets available for direct spectroscopy in the near-infrared. Furthermore, VFN targets planets on closer-in orbits which tend to have more favorable planet-to-star flux ratios in reflected light. Here, we present the theory and applications of VFN, show that the optical performance is approximately equivalent for a variety of implementations and aperture shapes, and discuss the trade-offs between throughput and engineering requirements using numerical simulations. We compare vector and scalar approaches and, finally, show that beam shaping optics may be used to significantly improve the throughput for planet light. Based on theoretical performance, we estimate the number of known planets and theoretical exoEarths accessible with a VFN instrument linked to a high-resolution spectrograph on the future Thirty Meter Telescope.", "date": "2019-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1111716", "id_number": "CaltechAUTHORS:20190912-162000191", "isbn": "9781510629271", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190912-162000191", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.2528555", "primary_object": { "basename": "1111716.pdf", "url": "https://authors.library.caltech.edu/records/5cpb4-njs34/files/1111716.pdf" }, "related_objects": [ { "basename": "1908.09780.pdf", "url": "https://authors.library.caltech.edu/records/5cpb4-njs34/files/1908.09780.pdf" } ], "resource_type": "book_section", "pub_year": "2019", "author_list": "Ruane, Garreth; Echeverri, Daniel; et el." }, { "id": "https://authors.library.caltech.edu/records/wh51d-qkv48", "eprint_id": 98513, "eprint_status": "archive", "datestamp": "2023-08-19 17:45:48", "lastmod": "2024-01-14 21:55:57", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Tinyanont-S", "name": { "family": "Tinyanont", "given": "Samaporn" }, "orcid": "0000-0002-1481-4676" }, { "id": "Millar-Blanchaer-M-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell A." }, "orcid": "0000-0001-6205-9233" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" }, { "id": "Milburn-J-W", "name": { "family": "Milburn", "given": "Jennifer W." } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Porter-M", "name": { "family": "Porter", "given": "Michael" } }, { "id": "Palatnick-S", "name": { "family": "Palatnick", "given": "Skyler" } }, { "id": "Hopkins-Connor", "name": { "family": "Hopkins", "given": "Connor" } } ] }, "title": "Achieving a spectropolarimetric precision better than 0.1% in the near-infrared with WIRC+Pol", "ispublished": "unpub", "full_text_status": "public", "keywords": "spectropolarimetry, polarization grating", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nPublished - 1113209.pdf
Accepted Version - 1908.10409.pdf
", "abstract": "WIRC+Pol is a near-infrared low-resolution spectropolarimeter on the 200-inch Telescope at Palomar Observatory. The instrument utilizes a polarization grating to perform polarimetric beam splitting and spectral dispersion simultaneously. It can operate either with a focal plane slit to reduce sky background or in a slitless mode. Four different spectra sampling four linear polarization angles are recorded in the focal plane, allowing the instrument to measure all linear polarization states in one exposure. The instrument has been on-sky since February 2017 and we found that the systematic errors, likely arising from flat fielding and gravity effects on the instrument, limit our accuracy to ~1%. These systematic effects were slowly varying, and hence could be removed with a polarimetric modulator. A half-wave plate modulator and a linear polarizer were installed in front of WIRC+Pol in March 2019. The modulator worked as expected, allowing us to measure and remove all instrumental polarization we previously observed. The deepest integration on a bright point source (J = 7.689, unpolarized star HD65970) demonstrated uncertainties in q and u of 0.03% per spectral channel, consistent with the photon noise limit. Observations of fainter sources showed that the instrument could reach the photon noise limit for observations in the slitless mode. For observations in slit, the uncertainties were still a factor of few above the photon noise limit, likely due to slit loss.", "date": "2019-09-06", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1113209", "id_number": "CaltechAUTHORS:20190909-093503549", "isbn": "9781510629578", "book_title": "Polarization Science and Remote Sensing IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190909-093503549", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Craven-J-M", "name": { "family": "Craven", "given": "Julia M." } }, { "id": "Shaw-J-A", "name": { "family": "Shaw", "given": "Joseph A." } }, { "id": "Snik-F", "name": { "family": "Snik", "given": "Frans" } } ] }, "doi": "10.1117/12.2529863", "primary_object": { "basename": "1113209.pdf", "url": "https://authors.library.caltech.edu/records/wh51d-qkv48/files/1113209.pdf" }, "related_objects": [ { "basename": "1908.10409.pdf", "url": "https://authors.library.caltech.edu/records/wh51d-qkv48/files/1908.10409.pdf" } ], "resource_type": "book_section", "pub_year": "2019", "author_list": "Tinyanont, Samaporn; Millar-Blanchaer, Maxwell A.; et el." }, { "id": "https://authors.library.caltech.edu/records/3vn41-hc225", "eprint_id": 97040, "eprint_status": "archive", "datestamp": "2023-08-19 14:38:33", "lastmod": "2023-10-20 21:51:57", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Van-Zandt-J", "name": { "family": "Van Zandt", "given": "Judah" } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. Kent" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Spectral Calibration of VERVE", "ispublished": "unpub", "full_text_status": "restricted", "note": "\u00a9 2019 IEEE. \n\nThe authors thank Erik Hovland for extensive technical support with regard to VERVE's camera software. \n\nWe are also grateful to Daniel Echeverri for his efforts to refine VERVE's interferometry script. \n\nFinally, we thank Gary Ruane for his assistance in the implementation of the estimate_transform function in the forward model. This correction was indispensable in reaching our precision goal.", "abstract": "With the exception of the transit method employed by the Kepler Space Telescope, the radial velocity (RV)technique has proven to be the most fruitful exoplanet detection method to date. High precision measurements with state-of-the-art equipment have achieved RV precision on the order of 0.5 m s^(\u22121). Given that Earth's induced RV on the sun is on the order of 10 cm s^(\u22121), this regime represents the next milestone on the path to finding Earth-like planets orbiting distant stars. We describe the Vacuum Extreme Radial Velocity Experiment (VERVE), a single mode fiber-fed high-resolution echelle spectrometer which integrates interferometry with spectroscopy with the aim of achieving RV precision at the 10 cm s^(\u22121) level, on par with the ESPRESSO spectrograph (Pepe et al., 2014 [1]). The addition of interferometry relaxes the spectral calibration requirement by several orders of magnitude. We detail the spectral calibration of VERVE, including the development of a precise forward model and a data reduction pipeline to facilitate spectral extraction. We examine the model's agreement with the spectra of various calibration sources and present the results of spectral extractions performed on 635 nm and 780 nm laser sources to demonstrate VERVE's spectroscopic capabilities. We note the 10 cm s^(\u22121) RV precision threshold for detecting Earth-like planets, and show that the ~ 2 pixel agreement we achieve is consistent with this requirement. We briefly introduce results pertaining to interferometry and conclude by describing the future stages of testing to prepare VERVE for novel RV measurements.", "date": "2019-03", "date_type": "published", "publisher": "IEEE", "place_of_pub": "Piscataway, NJ", "pagerange": "1-11", "id_number": "CaltechAUTHORS:20190710-153753056", "isbn": "9781538668542", "book_title": "2019 IEEE Aerospace Conference", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190710-153753056", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1109/aero.2019.8741644", "resource_type": "book_section", "pub_year": "2019", "author_list": "Van Zandt, Judah; Wallace, J. Kent; et el." }, { "id": "https://authors.library.caltech.edu/records/388yr-p7m84", "eprint_id": 88140, "eprint_status": "archive", "datestamp": "2023-08-19 11:08:45", "lastmod": "2024-01-14 20:29:23", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "id": "Riggs-A-D", "name": { "family": "Riggs", "given": "A." } }, { "id": "Coker-C-T", "name": { "family": "Coker", "given": "C. T." }, "orcid": "0000-0002-9954-7887" }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "S. B." } }, { "id": "Sidick-E", "name": { "family": "Sidick", "given": "E." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Jewell-Jeffrey-B", "name": { "family": "Jewell", "given": "J." } }, { "id": "Balasubramanian-K", "name": { "family": "Balasubramanian", "given": "K." } }, { "id": "Stark-C-C", "name": { "family": "Stark", "given": "C. C." } } ] }, "title": "Fast Linearized Coronagraph Optimizer (FALCO) IV. Coronagraph design survey for obstructed and segmented apertures", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, instrumentation, exoplanets, direct detection, coronagraphs", "note": "\u00a9 2018 Society of Photo-optical Instrumentation Engineers (SPIE). \n\nG. Ruane is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444. This work was supported by the Exoplanet Exploration Program (ExEP), Jet Propulsion Laboratory, California Institute of Technology, under contract to NASA.\n\nPublished - 106984U.pdf
Submitted - 1807.06758.pdf
", "abstract": "Coronagraph instruments on future space telescopes will enable the direct detection and characterization of Earth-like exoplanets around Sun-like stars for the first time. The quest for the optimal optical coronagraph designs has made rapid progress in recent years thanks to the Segmented Coronagraph Design and Analysis (SCDA) initiative led by the Exoplanet Exploration Program at NASA's Jet Propulsion Laboratory. As a result, several types of high-performance designs have emerged that make use of dual deformable mirrors to (1) correct for optical aberrations and (2) suppress diffracted starlight from obstructions and discontinuities in the telescope pupil. However, the algorithms used to compute the optimal deformable mirror surface tend to be computationally intensive, prohibiting large scale design surveys. Here, we utilize the Fast Linearized Coronagraph Optimizer (FALCO), a tool that allows for rapid optimization of deformable mirror shapes, to explore trade-offs in coronagraph designs for obstructed and segmented space telescopes. We compare designs for representative shaped pupil Lyot and vortex coronagraphs, two of the most promising concepts for the LUVOIR space mission concept. We analyze the optical performance of each design, including their throughput and ability to passively suppress light from partially resolved stars in the presence of low-order aberrations. Our main result is that deformable mirror based apodization can suffciently suppress diffraction from support struts and inter-segment gaps whose widths are on the order of ~0.1% of the primary mirror diameter to detect Earth-sized planets within a few tens of milliarcseconds from the star.", "date": "2018-08-21", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 106984U", "id_number": "CaltechAUTHORS:20180723-152618824", "isbn": "9781510619494", "book_title": "Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180723-152618824", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Lystrup-M", "name": { "family": "Lystrup", "given": "Makenzie" } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Fazio-G-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "Batalha-N-M", "name": { "family": "Batalha", "given": "Natalie" } }, { "id": "Siegler-N", "name": { "family": "Siegler", "given": "Nicholas" } }, { "id": "Tong-Edward-C", "name": { "family": "Tong", "given": "Edward C." } } ] }, "doi": "10.1117/12.2312973", "primary_object": { "basename": "106984U.pdf", "url": "https://authors.library.caltech.edu/records/388yr-p7m84/files/106984U.pdf" }, "related_objects": [ { "basename": "1807.06758.pdf", "url": "https://authors.library.caltech.edu/records/388yr-p7m84/files/1807.06758.pdf" } ], "resource_type": "book_section", "pub_year": "2018", "author_list": "Ruane, G.; Riggs, A.; et el." }, { "id": "https://authors.library.caltech.edu/records/phjcv-deb15", "eprint_id": 91551, "eprint_status": "archive", "datestamp": "2023-08-19 11:10:23", "lastmod": "2024-01-14 21:15:52", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Martin-S-R", "name": { "family": "Martin", "given": "Stefan" } }, { "id": "Rud-M", "name": { "family": "Rud", "given": "Mayer" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Nissen-J-A", "name": { "family": "Nissen", "given": "Joel" } }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } }, { "id": "Marchen-L-F", "name": { "family": "Marchen", "given": "Luis" } } ] }, "title": "HabEx space telescope exoplanet instruments", "ispublished": "unpub", "full_text_status": "public", "keywords": "HabEx, space telescope", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe information in this paper on the HabEx concept is provided prior to any decisions or commitments being made and is provided for planning and discussion purposes only. This work was conducted at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. Copyright 2018 California Institute of Technology. Government sponsorship acknowledged. All rights reserved. URS#274214.\n\nPublished - 106980T.pdf
", "abstract": "The HabEx (Habitable Exoplanet) space telescope mission concept carries two complementary optical systems as part of its baseline design, a coronagraph and a starshade, that are designed to detect and characterize planetary systems around nearby stars. The starshade is an external occulter which would be 72 m in diameter and fly some 124,000 km ahead of the telescope. A starshade instrument on board the telescope enables formation flying to maintain the starshade within 1 m of the line of sight to the star. The starshade instrument has various modes, including imaging from the near UV through to the near infrared and integral field spectroscopy in the visible band. The coronagraph would provide imaging and integral field spectroscopy in the visible band and would reach out to 1800 nm for low resolution spectroscopy in the near infrared. To provide the necessary stability for the coronagraph, the telescope would be equipped with a laser metrology system allowing measurement and control of the relative positions of the principal mirrors. In addition, a fine guidance sensor is needed for precision attitude control. The requirements for telescope stability for coronagraphy are discussed. The design and requirements on the starshade will also be discussed.", "date": "2018-08-21", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 106980T", "id_number": "CaltechAUTHORS:20181207-083716033", "isbn": "9781510619494", "book_title": "Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181207-083716033", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Lystrup-M", "name": { "family": "Lystrup", "given": "Makenzie" } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Fazio-G-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "Batalha-N-M", "name": { "family": "Batalha", "given": "Natalie" } }, { "id": "Siegler-N", "name": { "family": "Siegler", "given": "Nicholas" } }, { "id": "Tong-Edward-C", "name": { "family": "Tong", "given": "Edward C." } } ] }, "doi": "10.1117/12.2314410", "primary_object": { "basename": "106980T.pdf", "url": "https://authors.library.caltech.edu/records/phjcv-deb15/files/106980T.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Martin, Stefan; Rud, Mayer; et el." }, { "id": "https://authors.library.caltech.edu/records/hpsq3-a9k09", "eprint_id": 91555, "eprint_status": "archive", "datestamp": "2023-08-19 10:58:06", "lastmod": "2024-01-14 21:16:00", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Gaudi-B-S", "name": { "family": "Gaudi", "given": "B. Scott" }, "orcid": "0000-0003-0395-9869" }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Seager-S", "name": { "family": "Seager", "given": "Sara" }, "orcid": "0000-0002-6892-6948" }, { "id": "Cahoy-K-L", "name": { "family": "Cahoy", "given": "Kerri" } }, { "id": "Clarke-J-T", "name": { "family": "Clarke", "given": "John" } }, { "id": "Domagal-Goldman-S", "name": { "family": "Domagal-Goldman", "given": "Shawn" } }, { "id": "Feinberg-L", "name": { "family": "Feinberg", "given": "Lee" } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Kasdin-J", "name": { "family": "Kasdin", "given": "Jeremy" } }, { "id": "Marois-C", "name": { "family": "Marois", "given": "Christian" }, "orcid": "0000-0002-4164-4182" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Tamura-Motohide", "name": { "family": "Tamura", "given": "Motohide" }, "orcid": "0000-0002-6510-0681" }, { "id": "Mouillet-D", "name": { "family": "Mouillet", "given": "David" } }, { "id": "Prusti-T", "name": { "family": "Prusti", "given": "Timo" } }, { "id": "Quirrenbach-A", "name": { "family": "Quirrenbach", "given": "Andreas" } }, { "id": "Robinson-T-D", "name": { "family": "Robinson", "given": "Tyler" } }, { "id": "Rogers-L-A", "name": { "family": "Rogers", "given": "Leslie" }, "orcid": "0000-0003-0638-3455" }, { "id": "Scowen-P-A", "name": { "family": "Scowen", "given": "Paul" } }, { "id": "Somerville-R-S", "name": { "family": "Somerville", "given": "Rachel" } }, { "id": "Stapelfeldt-K-R", "name": { "family": "Stapelfeldt", "given": "Karl" }, "orcid": "0000-0002-2805-7338" }, { "id": "Stark-C", "name": { "family": "Stark", "given": "Christopher" } }, { "id": "Stern-D", "name": { "family": "Stern", "given": "Daniel" }, "orcid": "0000-0003-2686-9241" }, { "id": "Still-M", "name": { "family": "Still", "given": "Martin" } }, { "id": "Turnbull-M-C", "name": { "family": "Turnbull", "given": "Margaret" } }, { "id": "Booth-J", "name": { "family": "Booth", "given": "Jeffrey" } }, { "id": "Kiessling-A", "name": { "family": "Kiessling", "given": "Alina" } }, { "id": "Kuan-Gary", "name": { "family": "Kuan", "given": "Gary" } }, { "id": "Warfield-K-R", "name": { "family": "Warfield", "given": "Keith" } } ] }, "title": "Habitable Exoplanet Observatory (HabEx)", "ispublished": "unpub", "full_text_status": "public", "keywords": "decadal, exoplanets, biosignatures, high contrast imaging, galaxy formation and evolution, coronagraph, starshade", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nPart of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.\n\nPublished - 106980P.pdf
", "abstract": "The Habitable-Exoplanet Observatory (HabEx) is a candidate flagship mission being studied by NASA and the astrophysics community in preparation of the 2020 Decadal Survey. The first HabEx mission concept that has been studied is a large (~4m) diffraction-limited optical space telescope, providing unprecedented resolution and contrast in the optical, with extensions into the near ulttraviolet and near infrared domains. We report here on our team's efforts in defining a scientifically compelling HabEx mission that is technologically executable, affordable within NASA's expected budgetary envelope, and timely for the next decade. We also briefly discuss our plans to explore less ambitious, descoped missions relative to the primary mission architecture discussed here.", "date": "2018-08-01", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 106980P", "id_number": "CaltechAUTHORS:20181207-083716481", "isbn": "9781510619494", "book_title": "Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181207-083716481", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Lystrup-M", "name": { "family": "Lystrup", "given": "Makenzie" } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Fazio-G-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "Batalha-N-M", "name": { "family": "Batalha", "given": "Natalie" } }, { "id": "Siegler-N", "name": { "family": "Siegler", "given": "Nicholas" } }, { "id": "Tong-Edward-C", "name": { "family": "Tong", "given": "Edward C." } } ] }, "doi": "10.1117/12.2312278", "primary_object": { "basename": "106980P.pdf", "url": "https://authors.library.caltech.edu/records/hpsq3-a9k09/files/106980P.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Gaudi, B. Scott; Mennesson, Bertrand; et el." }, { "id": "https://authors.library.caltech.edu/records/74jre-h4r65", "eprint_id": 92051, "eprint_status": "archive", "datestamp": "2023-08-19 10:29:15", "lastmod": "2024-01-14 21:24:12", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Xin-Yeyuan", "name": { "family": "Xin", "given": "Yeyuan" } }, { "id": "Llop-Sayson-J-D", "name": { "family": "Llop Sayson", "given": "Jorge" } }, { "id": "Klimovich-N-S", "name": { "family": "Klimovich", "given": "Nikita" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "Jacques" } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } } ] }, "title": "Demonstration of a speckle nulling algorithm and Kalman filter estimator with a fiber injection unit for observing exoplanets with high-dispersion coronagraphy", "ispublished": "unpub", "full_text_status": "public", "keywords": "vortex coronagraph, fiber injection unit, speckle nulling, Kalman filter, spectrograph, exoplanet characterization", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nhe authors would like to acknowledge the financial support of the Caltech Student Faculty Program (SFP) office and the Jean Dixon SURF Fellowship.\n\nPublished - 107036Z.pdf
", "abstract": "High-dispersion coronagraphy (HDC) combines high contrast imaging techniques with high spectral resolution spectroscopy to observe exoplanets and determine characteristics such as chemical composition, temperature, and rotational velocities. It has been demonstrated in lab that with monochromatic light, a fiber injection unit (FIU), in which an optical fiber is used to couple to light from the exoplanet, could be used to direct exoplanet light to a high-resolution spectrograph, with robust performance and speckle suppression that exceeds conventional image-based speckle nulling. We now demonstrate in lab a FIU based speckle nulling scheme with a Kalman filter estimator. We currently find that speckle nulling with a Kalman filter is more stable and outperforms traditional speckle nulling by 10% in suppression in the presence of white detector noise.", "date": "2018-07-18", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107036Z", "id_number": "CaltechAUTHORS:20190103-153503823", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190103-153503823", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Caltech Summer Undergraduate Research Fellowship (SURF)" }, { "agency": "Jean Dixon SURF Fellowship" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "Schreiber-L", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-D", "name": { "family": "Schmidt", "given": "Dirk" } } ] }, "doi": "10.1117/12.2312357", "primary_object": { "basename": "107036Z.pdf", "url": "https://authors.library.caltech.edu/records/74jre-h4r65/files/107036Z.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Xin, Yeyuan; Llop Sayson, Jorge; et el." }, { "id": "https://authors.library.caltech.edu/records/h995s-zfb19", "eprint_id": 92138, "eprint_status": "archive", "datestamp": "2023-08-19 10:29:20", "lastmod": "2024-01-14 21:24:57", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "J. R." } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "N." } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. K." } }, { "id": "Bartos-R-D", "name": { "family": "Bartos", "given": "R. D." } }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "D." }, "orcid": "0000-0002-1583-2040" }, { "id": "Bond-C-Z", "name": { "family": "Bond", "given": "C. Z." } }, { "id": "Cetre-S", "name": { "family": "Cetre", "given": "S." } }, { "id": "Lilley-S-J", "name": { "family": "Lilley", "given": "S." } }, { "id": "Jacobson-S-M", "name": { "family": "Jacobson", "given": "S." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "P. L." }, "orcid": "0000-0002-1646-442X" }, { "id": "Fitzgerald-M", "name": { "family": "Fitzgerald", "given": "M." } } ] }, "title": "First version of the fiber injection unit for the Keck Planet Imager and Characterizer", "ispublished": "unpub", "full_text_status": "public", "keywords": "Adaptive Optics, High contrast imaging, High resolution spectroscopy, Exoplanet characterization, Doppler imaging", "note": "\u00a9 2018 Society of Photo-optical Instrumentation Engineers (SPIE). \n\nThe W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The near-infrared pyramid wavefront sensor is supported by the National Science Foundation under Grant No. AST-1611623. The fiber injection unit is supported by the Heising-Simons Foundation. The PWS camera was provided by Don Hall as part of his National Science Foundation funding under Grant No. AST 1106391.\n\nPublished - 107033B.pdf
", "abstract": "Coupling a high-contrast imaging instrument to a high-resolution spectrograph has the potential to enable the most detailed characterization of exoplanet atmospheres, including spin measurements and Doppler mapping. The high-contrast imaging system serves as a spatial filter to separate the light from the star and the planet while the high-resolution spectrograph acts as a spectral filter, which differentiates between features in the stellar and planetary spectra. The Keck Planet Imager and Characterizer (KPIC) located downstream from the current W. M. Keck II adaptive optics (AO) system will contain a fiber injection unit (FIU) combining a high-contrast imaging system and a fiber feed to Keck's high resolution infrared spectrograph NIRSPEC. Resolved thermal emission from known young giant exoplanets will be injected into a single-mode fiber linked to NIRSPEC, thereby allowing the spectral characterization of their atmospheres. Moreover, the resolution of NIRSPEC (R = 37,500 after upgrade) is high enough to enable spin measurements and Doppler imaging of atmospheric weather phenomenon. The module was integrated at Caltech and shipped to Hawaii at the beginning of 2018 and is currently undergoing characterization. Its transfer to Keck is planned in September and first on-sky tests sometime in December.", "date": "2018-07-18", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107033B", "id_number": "CaltechAUTHORS:20190108-112614029", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190108-112614029", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" }, { "agency": "NSF", "grant_number": "AST-1611623" }, { "agency": "Heising-Simons Foundation" }, { "agency": "NSF", "grant_number": "AST-1106391" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "Schreiber-L", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-D", "name": { "family": "Schmidt", "given": "Dirk" } } ] }, "doi": "10.1117/12.2313774", "primary_object": { "basename": "107033B.pdf", "url": "https://authors.library.caltech.edu/records/h995s-zfb19/files/107033B.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Delorme, J. R.; Jovanovic, N.; et el." }, { "id": "https://authors.library.caltech.edu/records/0t17n-qas82", "eprint_id": 87815, "eprint_status": "archive", "datestamp": "2023-08-19 10:28:51", "lastmod": "2024-01-14 20:24:46", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Mazin-B-A", "name": { "family": "Mazin", "given": "Benjamin" } }, { "id": "Fitzgerald-M-P", "name": { "family": "Fitzgerald", "given": "Michael" }, "orcid": "0000-0002-0176-8973" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Marois-C", "name": { "family": "Marois", "given": "Christian" }, "orcid": "0000-0002-4164-4182" }, { "id": "Skemer-A-J", "name": { "family": "Skemer", "given": "Andy" }, "orcid": "0000-0001-6098-3924" }, { "id": "Lozi-J", "name": { "family": "Lozi", "given": "Julien" }, "orcid": "0000-0002-3047-1845" }, { "id": "Males-J-R", "name": { "family": "Males", "given": "Jared" } } ] }, "title": "Wavefront control architecture and expected performance for the TMT planetary systems imager", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanets, High Contrast Imaging, Adaptive Optics, Coronagraphy", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe author acknowledges funding support from the Japanese Society for the Promotion of Sciences (JSPS), the Japanese Astrobiology Center, National Institutes for Natural Sciences (ABC/NINS). The authors acknowledge support from the JSPS (Grant-in-Aid for Research 23340051 and 26220704). The authors wish to acknowledge the Center for Adaptive Optics Fall Retreat and the TMT Science Forum, where much of this work originated.\n\nPublished - 107030Z.pdf
", "abstract": "The Planetary Systems Imager (PSI) is a modular instrument optimized for direct imaging and characterization of exoplanet and disks with the Thirty Meter Telescope (TMT). PSI will operate across a wide wavelength range (\u22480.6 - 5\u03bcm) to image exoplanets and circumstellar disks in both reflected light and thermal emission. Thanks to the TMT's large collecting area, PSI will have the sensitivity to directly image and spectrally characterize large gaseous planets with unprecedented sensitivity. PSI will also be capable of imaging rocky planets in the habitable zones of the nearest M-type stars in reflected light and search for biomarkers in their atmospheres. Imaging habitable planets in reflected light is PSI's most challenging goal, requiring high contrast imaging (HCI) capabilities well beyond what current instruments achieve. This science goal drives PSI's wavefront sensing and control requirements and defines the corresponding architecture discussed in this paper. We show that PSI must deliver 1e-5 image contrast \u224815 mas separation at \u03bb \u2248 1\u03bcm-1.5\u03bcm, and that a conventional extreme-AO architecture relying on a single high speed wavefront sensor (WFS) is not sufficient to meet this requirement. We propose a wavefront control architecture relying on both visible light (\u03bb < 1.1 \u03bcm) sensing to optimize sensitivity, and near-IR (\u03bb > 1.1 \u03bcm) sensors to address wavefront chromaticity terms and provide high contrast imaging capability. We show that this combination will enable speckle halo suppression at the < 1e-5 raw contrast level in near-IR, allowing detection and spectroscopic characterization of potentially habitable exoplanets orbiting nearby M-type stars.", "date": "2018-07-17", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107030Z", "id_number": "CaltechAUTHORS:20180712-155553779", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180712-155553779", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "23340051" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "26220704" }, { "agency": "National Institutes of Natural Sciences of Japan" } ] }, "local_group": { "items": [ { "id": "Thirty-Meter-Telescope" }, { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "Schreiber-L", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-D", "name": { "family": "Schmidt", "given": "Dirk" } } ] }, "corp_creators": { "items": [ "TMT-PSI Instrument Team" ] }, "doi": "10.1117/12.2314331", "primary_object": { "basename": "107030Z.pdf", "url": "https://authors.library.caltech.edu/records/0t17n-qas82/files/107030Z.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Guyon, Olivier; Mazin, Benjamin; et el." }, { "id": "https://authors.library.caltech.edu/records/c86ca-tnb09", "eprint_id": 91396, "eprint_status": "archive", "datestamp": "2023-08-19 10:28:20", "lastmod": "2024-01-14 21:14:29", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Skemer-A-J", "name": { "family": "Skemer", "given": "Andrew J." }, "orcid": "0000-0001-6098-3924" }, { "id": "Stelter-D", "name": { "family": "Stelter", "given": "Deno" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Fitzgerald-M-P", "name": { "family": "Fitzgerald", "given": "Michael" }, "orcid": "0000-0002-0176-8973" }, { "id": "Mazin-B-A", "name": { "family": "Mazin", "given": "Benjamin" } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Marois-C", "name": { "family": "Marois", "given": "Christian" }, "orcid": "0000-0002-4164-4182" }, { "id": "Briesemeister-Z", "name": { "family": "Briesemeister", "given": "Zackery" } }, { "id": "Brandt-T-D", "name": { "family": "Brandt", "given": "Timothy" }, "orcid": "0000-0003-2630-8073" }, { "id": "Chilcote-J-K", "name": { "family": "Chilcote", "given": "Jeffrey" }, "orcid": "0000-0001-6305-7272" }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Lu-Jessica-R", "name": { "family": "Lu", "given": "Jessica" }, "orcid": "0000-0001-9611-0009" }, { "id": "Millar-Blanchaer-M-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell" }, "orcid": "0000-0001-6205-9233" }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "James" } }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" }, { "id": "Roberts-L-C-Jr", "name": { "family": "Roberts", "given": "Lewis C., Jr." }, "orcid": "0000-0003-3892-2900" }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" } ] }, "title": "The Planetary Systems Imager: 2-5 Micron Channel", "ispublished": "unpub", "full_text_status": "public", "keywords": "Adaptive optics, integral field spectroscopy, exoplanet imaging, exoplanet instrumentation", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe authors wish to acknowledge the Center for Adaptive Optics Fall Retreat and the TMT Science Forum, where much of this work originated. This paper is based on work funded by NSF Grants 1608834 and 1614320.\n\nPublished - 10702A5.pdf
Submitted - 1808.03304.pdf
", "abstract": "We summarize the red channel (2-5 micron) of the Planetary Systems Imager (PSI), a proposed second-generation instrument for the TMT. Cold exoplanets emit the majority of their light in the thermal infrared, which means these exoplanets can be detected at a more modest contrast than at other wavelengths. PSI-Red will be able to detect and characterize a wide variety of exoplanets, including radial-velocity planets on wide orbits, accreting protoplanets in nearby star-forming regions, and reflected-light planets around the nearest stars. PSI-Red will feature an imager, a low-resolution lenslet integral field spectrograph, a medium-resolution lenslet+slicer integral field spectrograph, and a fiber-fed high-resolution spectrograph.", "date": "2018-07-16", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 10702A5", "id_number": "CaltechAUTHORS:20181203-101750008", "isbn": "9781510619579", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181203-101750008", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1608834" }, { "agency": "NSF", "grant_number": "AST-1614320" } ] }, "local_group": { "items": [ { "id": "Thirty-Meter-Telescope" }, { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Simard-L", "name": { "family": "Simard", "given": "Luc" } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2314173", "primary_object": { "basename": "1808.03304.pdf", "url": "https://authors.library.caltech.edu/records/c86ca-tnb09/files/1808.03304.pdf" }, "related_objects": [ { "basename": "10702A5.pdf", "url": "https://authors.library.caltech.edu/records/c86ca-tnb09/files/10702A5.pdf" } ], "resource_type": "book_section", "pub_year": "2018", "author_list": "Skemer, Andrew J.; Stelter, Deno; et el." }, { "id": "https://authors.library.caltech.edu/records/6zg50-0bq85", "eprint_id": 98197, "eprint_status": "archive", "datestamp": "2023-08-19 10:26:21", "lastmod": "2024-01-14 21:54:30", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "D." }, "orcid": "0000-0002-1583-2040" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "N." } }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "J. R." } }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "id": "Fucik-J-R", "name": { "family": "Fucik", "given": "J." } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. K." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Optimizing optics and opto-mechanical mounting to minimize static aberrations in high-contrast instruments", "ispublished": "unpub", "full_text_status": "public", "keywords": "High Contrast Imaging, Instrumentation, Opto-Mechanical Systems", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe authors would like to acknowledge the financial support of the Heising-Simons foundation. G. Ruane is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444. This work was also supported by the Exoplanet Exploration Program (ExEP), Jet Propulsion Laboratory, California Institute of Technology, under contract to NASA.\n\nPublished - 1070358.pdf
", "abstract": "One of the goals of high-contrast imaging is to reach contrasts of 10^(-10) at small inner working angles to directly image Earth-like exoplanets around solar-type stars. In most imaging systems, a deformable mirror (DM) in the pupil plane can correct for phase errors but surface errors in out-of-pupil optics get coupled into amplitude errors which can only be controlled with a second, out of pupil, DM. Furthermore, correcting static errors introduced by the optics can take up valuable DM stroke. Thus, minimizing the wavefront error within the system is critical to reaching high contrast levels. For example, the High Contrast Spectroscopy for Segmented Telescopes Testbed (HCST) in the Exoplanet Technologoy lab at Caltech aims to develop exoplanet imaging technologies down to small inner working angles (< 3\u03bb/D) which requires an RMS wavefront error of less than 10 nm per optic to achieve a contrast of 10^(\u22125) with the DM flattened. While aligning HCST, it was determined that despite the excellent surface quality of all the optics, the mounts were introducing significant wavefront errors. Here we assess the effect of mount-induced wavefront errors that can rapidly consume the wavefront budget of a high-contrast system. We also present the method used to mitigate this effect within HCST such that a mean contrast of 6 \u00d7 10^(-6) from 3-10\u03bb/D was achieved with a vortex coronagraph and flattened DM.", "date": "2018-07-13", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1070358", "id_number": "CaltechAUTHORS:20190823-134014824", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190823-134014824", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation" }, { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "Schreiber-L", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-D", "name": { "family": "Schmidt", "given": "Dirk" } } ] }, "doi": "10.1117/12.2313887", "primary_object": { "basename": "1070358.pdf", "url": "https://authors.library.caltech.edu/records/6zg50-0bq85/files/1070358.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Echeverri, D.; Jovanovic, N.; et el." }, { "id": "https://authors.library.caltech.edu/records/tdnex-7aw95", "eprint_id": 88139, "eprint_status": "archive", "datestamp": "2023-08-19 10:25:33", "lastmod": "2024-01-14 20:29:21", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Zhang-Manxuan", "name": { "family": "Zhang", "given": "Manxuan" } }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Jewell-Jeffrey-B", "name": { "family": "Jewell", "given": "Jeffrey" } }, { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "Stuart" } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. Kent" } } ] }, "title": "Characterization of microdot apodizers for imaging exoplanets with next-generation space telescopes", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, instrumentation, exoplanets, direct detection, coronagraphs", "note": "\u00a9 2018 Society of Photo-optical Instrumentation Engineers (SPIE). \n\nG. Ruane is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444. This work was supported by the Exoplanet Exploration Program (ExEP), Jet Propulsion Laboratory, California Institute of Technology, under contract to NASA.\n\nPublished - 106985X.pdf
Submitted - 1807.06761.pdf
", "abstract": "A major science goal of future, large-aperture, optical space telescopes is to directly image and spectroscopically analyze reflected light from potentially habitable exoplanets. To accomplish this, the optical system must suppress diffracted light from the star to reveal point sources approximately ten orders of magnitude fainter than the host star at small angular separation. Coronagraphs with microdot apodizers achieve the theoretical performance needed to image Earth-like planets with a range of possible telescope designs, including those with obscured and segmented pupils. A test microdot apodizer with various bulk patterns (step functions, gradients, and sinusoids) and 4 different dot sizes (3 \u03bcm, 5 \u03bcm, 7 \u03bcm, and 10 \u03bcm) made of small chrome squares on anti-reflective glass was characterized with microscopy, optical laser interferometry, as well as transmission and reflectance measurements at wavelengths \u03bb=600 nm and \u03bb=800 nm. Microscopy revealed the microdots were fabricated to high precision. Results from laser interferometry showed that the phase shifts observed in reflection vary with the local microdot fill factor. This effect is not explained purely by interference between reflected fields from the chrome and glass portions. Transmission measurements showed that microdot fill factor and transmission were linearly related for dot sizes \u22655 \u03bcm. However, anomalously high transmittance was measured when the dot size is <5\u00d7 the wavelength (i.e. \u223c3 \u03bcm) and the fill factor is approximately 50%, where the microdot pattern becomes periodic. The transmission excess is not as prominent in the case of larger dot sizes suggesting that it is likely to be caused by the interaction between the incident field and electronic resonances in the surface of the metallic microdots. We used our empirical models of the microdot apodizers to optimize a second generation of reflective apodizer designs, specifically for demonstrating end-to-end instrumentation for planet characterization at Caltech's High Contrast Spectroscopy Testbed for Segmented Telescopes (HCST), and confirmed that the amplitude and phase of the reflected beam closely matches the ideal wavefront.", "date": "2018-07-12", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 106985X", "id_number": "CaltechAUTHORS:20180723-152238522", "isbn": "9781510619494", "book_title": "Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180723-152238522", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Lystrup-M", "name": { "family": "Lystrup", "given": "Makenzie" } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Fazio-G-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "Batalha-N-M", "name": { "family": "Batalha", "given": "Natalie" } }, { "id": "Siegler-N", "name": { "family": "Siegler", "given": "Nicholas" } }, { "id": "Tong-Edward-C", "name": { "family": "Tong", "given": "Edward C." } } ] }, "doi": "10.1117/12.2312831", "primary_object": { "basename": "106985X.pdf", "url": "https://authors.library.caltech.edu/records/tdnex-7aw95/files/106985X.pdf" }, "related_objects": [ { "basename": "1807.06761.pdf", "url": "https://authors.library.caltech.edu/records/tdnex-7aw95/files/1807.06761.pdf" } ], "resource_type": "book_section", "pub_year": "2018", "author_list": "Zhang, Manxuan; Ruane, Garreth; et el." }, { "id": "https://authors.library.caltech.edu/records/8mkt8-fxz40", "eprint_id": 92164, "eprint_status": "archive", "datestamp": "2023-08-19 10:25:43", "lastmod": "2024-01-14 21:25:19", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Llop-Sayson-J-D", "name": { "family": "Llop Sayson", "given": "Jorge" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Klimovich-N-S", "name": { "family": "Klimovich", "given": "Nikita" } }, { "id": "Xin-Yeyuan", "name": { "family": "Xin", "given": "Yeyuan" } } ] }, "title": "Wavefront control for minimization of speckle coupling into a fiber injection unit based on the electric field conjugation algorithm", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, Wavefront control, Wavefront sensing, Fiber injection unit, Electric Field\nConjugation", "note": "\u00a9 2018 Society of Photo-optical Instrumentation Engineers (SPIE).\n\nPublished - 1070372.pdf
", "abstract": "A fiber injection unit situated in the focal plane behind a coronagraph feeding a high resolution spectrograph can be used to couple light from an exoplanet to obtain high resolution spectra with improved sensitivity. However, the signal-to-noise ratio of the planet signal is limited by the coupling of starlight into the single mode fiber. To minimize this coupling, we need to apply a control loop on the stellar wavefront at the input of the fiber. We present here a wavefront control algorithm based on the formalism of the Electric Field Conjugation (EFC) controller that accounts for the effect of the fiber. The control output is the overlap integral of the electric field with the fundamental mode of a single mode fiber. This overlap integral is estimated by sending probes to a deformable mirror. We present results from simulations, and laboratory results obtained at the Caltech Exoplanet Technology Lab's transmissive testbed. We show that our approach offers a significant improvement in starlight suppression through the fiber relative to a conventional EFC controller. This new approach improves the contrast of a high contrast instrument and could be used in future missions.", "date": "2018-07-12", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1070372", "id_number": "CaltechAUTHORS:20190109-105316778", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190109-105316778", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "Schreiber-L", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-D", "name": { "family": "Schmidt", "given": "Dirk" } } ] }, "doi": "10.1117/12.2313657", "primary_object": { "basename": "1070372.pdf", "url": "https://authors.library.caltech.edu/records/8mkt8-fxz40/files/1070372.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Llop Sayson, Jorge; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.edu/records/ggn18-x8k73", "eprint_id": 87813, "eprint_status": "archive", "datestamp": "2023-08-19 10:24:56", "lastmod": "2024-01-14 20:24:41", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Cetre-S", "name": { "family": "Cetre", "given": "Sylvain" } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Bond-C-Z", "name": { "family": "Bond", "given": "Charlotte" } }, { "id": "Chun-Mark-R", "name": { "family": "Chun", "given": "Mark" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "id": "Lockhart-C", "name": { "family": "Lockhart", "given": "Charles" } }, { "id": "Goebel-S", "name": { "family": "Goebel", "given": "Sean" } }, { "id": "Wetherell-E", "name": { "family": "Wetherell", "given": "Ed" } } ] }, "title": "A near-infrared pyramid wavefront sensor for Keck adaptive optics: real-time controller", "ispublished": "unpub", "full_text_status": "public", "keywords": "Real-Time Control, Pyramid Wavefront Sensor, Adaptive Optics", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe near-infrared PWS is supported by the National Science Foundation under Grant No. AST-1611623. The fiber injection unit is supported by the Heising-Simons Foundation. The PWS camera was provided by Don Hall as part of his National Science Foundation funding under Grant No. ASF-1106391. We would like to acknowledge the technical contributions of Kevin Tsubota, Sam Ragland, Jason Chin, Jon Chock at WMKO, Eric Warmbier at IfA, Nemamja Jovanovic, Jacques-Robert Delorme at Caltech, the SCExAO team at Subaru and Frantz Martinache at Observatoire de la Cote d'Azur. Finally, we would like to thank Accelerate Diagnostics for providing the first GPU used in the RTC. The W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - 1070339.pdf
", "abstract": "A new real-time control system will be implemented within the Keck II adaptive optics system to support the new near-infrared pyramid wavefront sensor. The new real-time computer has to interface with an existing, very productive adaptive optics system. We discuss our solution to install it in an operational environment without impacting science. This solution is based on an independent SCExAO-based pyramid wavefront sensor realtime processor solution using the hardware interfaces provided by the existing Keck II real-time controller. We introduce the new pyramid real-time controller system design, its expected performance, and the modification of the operational real-time controller to support the pyramid system including interfacing with the existing deformable and tip-tilt mirrors. We describe the integration of the Saphira detector-based camera and the Boston Micromachines kilo-DM in this new architecture. We explain the software architecture and philosophy, the shared memory concept and how the real-time computer uses the power of GPUs for adaptive optics control. We discuss the strengths and weaknesses of this architecture and how it can benefit other projects. The motion control of the devices deployed on the Keck II adaptive optics bench to support the alignment of the light on the sensors is also described. The interfaces, developed to deal with the rest of the Keck telescope systems in the observatory distributed system, are reviewed. Based on this experience, we present which design ideas could have helped us integrate the new system with the previous one and the resultant performance gains.", "date": "2018-07-11", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1070339", "id_number": "CaltechAUTHORS:20180712-154055689", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180712-154055689", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1611623" }, { "agency": "Heising-Simons Foundation" }, { "agency": "NSF", "grant_number": "AST-1106391" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "Schreiber-L", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-D", "name": { "family": "Schmidt", "given": "Dirk" } } ] }, "doi": "10.1117/12.2311781", "primary_object": { "basename": "1070339.pdf", "url": "https://authors.library.caltech.edu/records/ggn18-x8k73/files/1070339.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Cetre, Sylvain; Guyon, Olivier; et el." }, { "id": "https://authors.library.caltech.edu/records/wnh24-mnm20", "eprint_id": 87814, "eprint_status": "archive", "datestamp": "2023-08-19 10:25:01", "lastmod": "2024-01-14 20:24:44", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Lilley-S-J", "name": { "family": "Lilley", "given": "Scott J." } }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Chun-Mark-R", "name": { "family": "Chun", "given": "Mark" } }, { "id": "Bond-C-Z", "name": { "family": "Cond", "given": "Charlotte Z." } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "James K." } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Jacobson-S-M", "name": { "family": "Jacobson", "given": "Shane M." } }, { "id": "Taheri-Mojtaba", "name": { "family": "Taheri", "given": "Mojtaba" } }, { "id": "Vandenberg-A", "name": { "family": "Vandenberg", "given": "Adam" } } ] }, "title": "Near-infrared pyramid wavefront sensor for Keck adaptive optics: opto-mechanical design", "ispublished": "unpub", "full_text_status": "public", "keywords": "AO, KPIC, near-infrared pyramid wavefront sensor", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe near-infrared pyramid wavefront sensor is supported by the National Science Foundation under Grant No. AST-1611623. The camera used with the pyramid wavefront sensor is provided by Don Hall with support by the National Science Foundation under Grant No. AST-1106391. The fiber injection unit is supported by the Heising-Simons Foundation. \n\nThe W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. \n\nThe authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain\n\nPublished - 107033G.pdf
", "abstract": "A near-infrared, high order pyramid wavefront sensor will be implemented on the Keck telescope, with the aim of providing high resolution adaptive optics correction for the study of exoplanets around M-type stars and planet formation in obscured star forming regions. The pyramid wavefront sensor is designed to support adaptive optics correction of the light to an imaging vortex coronagraph and to a fiber injection unit that will feed a spectrograph. We present the opto-mechanical design of the near-infrared pyramid wavefront sensor, the optical performance, and the alignment strategy. The challenges of designing the assembly, as well as a fiber injection unit, to fit into the limited available space on the Keck adaptive optics bench, will also be discussed.", "date": "2018-07-11", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107033G", "id_number": "CaltechAUTHORS:20180712-154840322", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180712-154840322", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1611623" }, { "agency": "Heising-Simons Foundation" }, { "agency": "NSF", "grant_number": "AST-1106391" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "Schreiber-L", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-D", "name": { "family": "Schmidt", "given": "Dirk" } } ] }, "doi": "10.1117/12.2312838", "primary_object": { "basename": "107033G.pdf", "url": "https://authors.library.caltech.edu/records/wnh24-mnm20/files/107033G.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Lilley, Scott J.; Wizinowich, Peter; et el." }, { "id": "https://authors.library.caltech.edu/records/z2qjj-q1c82", "eprint_id": 98184, "eprint_status": "archive", "datestamp": "2023-08-19 10:23:15", "lastmod": "2024-01-14 21:54:05", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Bond-C-Z", "name": { "family": "Bond", "given": "Charlotte Z." } }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "id": "Chun-Mark-R", "name": { "family": "Chun", "given": "Mark" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Lilley-S-J", "name": { "family": "Lilley", "given": "Scott" } }, { "id": "Cetre-S", "name": { "family": "Cetre", "given": "Sylvain" } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Wetherell-E", "name": { "family": "Wetherell", "given": "Edward" } }, { "id": "Jacobson-S-M", "name": { "family": "Jacobson", "given": "Shane" } }, { "id": "Lockhart-C", "name": { "family": "Lockhart", "given": "Charles" } }, { "id": "Warmbier-E-A", "name": { "family": "Warmbier", "given": "Eric" } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "James K." } }, { "id": "Hall-D-N-B", "name": { "family": "Hall", "given": "Donald N." } }, { "id": "Goebel-S-B", "name": { "family": "Goebel", "given": "Sean" }, "orcid": "0000-0003-3763-2418" }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Plantet-C", "name": { "family": "Plantet", "given": "Cedric" } }, { "id": "Agapito-G", "name": { "family": "Agapito", "given": "Guido" } }, { "id": "Giordano-C", "name": { "family": "Giordano", "given": "Christophe" } }, { "id": "Esposito-S", "name": { "family": "Esposito", "given": "Simone" } }, { "id": "Femen\u00eda-Castell\u00e1-B", "name": { "family": "Femen\u00eda-Castella", "given": "Bruno" } } ] }, "title": "Adaptive optics with an infrared Pyramid wavefront sensor", "ispublished": "unpub", "full_text_status": "public", "keywords": "Wavefront sensing, adaptive optics, Pyramid wavefront sensor, infrared", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe near-infrared pyramid wavefront sensor is supported by the National Science Foundation under Grant No. AST-1611623. The camera used with the pyramid wavefront sensor is provided by Don Hall with support by the National Science Foundation under Grant No. AST-1106391. The fiber injection unit is supported by the Heising-Simons Foundation. \n\nThe W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. \n\nThe authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - 107031Z.pdf
", "abstract": "Wavefront sensing in the infrared is highly desirable for the study of M-type stars and cool red objects, as they are sufficiently bright in the infrared to be used as the adaptive optics guide star. This aids in high contrast imaging, particularly for low mass stars where the star-to-planet brightness ratio is reduced. Here we discuss the combination of infrared detector technology with the highly sensitive Pyramid wavefront sensor (WFS) for a new generation of systems. Such sensors can extend the capabilities of current telescopes and meet the requirements for future instruments, such as those proposed for the giant segmented mirror telescopes. Here we introduce the infrared Pyramid WFS and discuss the advantages and challenges of this sensor. We present a new infrared Pyramid WFS for Keck, a key sub-system of the Keck Planet Imager and Characterizer (KPIC). The design, integration and testing is reported on, with a focus on the characterization of the SAPHIRA detector used to provide the H-band wavefront sensing. Initial results demonstrate a required effective read noise <1e^\u2013 at high gain.", "date": "2018-07-10", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107031Z", "id_number": "CaltechAUTHORS:20190823-134013491", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190823-134013491", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1611623" }, { "agency": "NSF", "grant_number": "AST-1106391" }, { "agency": "Heising-Simons Foundation" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "Schreiber-L", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-D", "name": { "family": "Schmidt", "given": "Dirk" } } ] }, "doi": "10.1117/12.2314121", "primary_object": { "basename": "107031Z.pdf", "url": "https://authors.library.caltech.edu/records/z2qjj-q1c82/files/107031Z.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Bond, Charlotte Z.; Wizinowich, Peter; et el." }, { "id": "https://authors.library.caltech.edu/records/xtvez-s0671", "eprint_id": 87801, "eprint_status": "archive", "datestamp": "2023-08-19 10:20:55", "lastmod": "2024-01-14 20:24:29", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Bond-C-Z", "name": { "family": "Bond", "given": "C. Z." } }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "J.-R." } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "N." } }, { "id": "Cetre-S", "name": { "family": "Cetre", "given": "S." } }, { "id": "Chun-Mark-R", "name": { "family": "Chun", "given": "M." } }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "D." }, "orcid": "0000-0002-1583-2040" }, { "id": "Hall-D", "name": { "family": "Hall", "given": "D." } }, { "id": "Lilley-S-J", "name": { "family": "Lilley", "given": "S." } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. K." } }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "P." }, "orcid": "0000-0002-1646-442X" } ] }, "title": "Keck Planet Imager and Characterizer (KPIC): status update", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanets, high contrast imaging, high contrast high resolution spectroscopy, small inner working angle coronagraphy, vortex coronagraph, on-axis segmented telescopes, apodization, Extremely Large Telescopes", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe near-infrared pyramid wavefront sensor is supported by the National Science Foundation under Grant No. AST-1611623. The camera used with the pyramid wavefront sensor is provided by Don Hall with support by the National Science Foundation under Grant No. AST-1106391. The fiber injection unit is supported by the Heising-Simons Foundation. \n\nThe W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. \n\nThis work was partially carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.\n\nPublished - 1070306.pdf
", "abstract": "Here we report on the status of the The Keck Planet Imager and Characterizer (KPIC), which is an on-going series of upgrades to the W.M. Keck II adaptive optics system and instrument suite focused on exoplanet imaging and spectroscopic characterization. The KPIC infrared pyramid wavefront sensor and fiber injection unit to high-resolution infrared spectrograph NIRSPEC have been assembled, integrated and are under-going tests at the University of Hawaii before installation at the Summit in the Fall of 2018.", "date": "2018-07-10", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1070306", "id_number": "CaltechAUTHORS:20180712-110818688", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180712-110818688", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1611623" }, { "agency": "NSF", "grant_number": "AST-1106391" }, { "agency": "Heising-Simons Foundation" }, { "agency": "W. M. Keck Foundation" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "Schreiber-L", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-D", "name": { "family": "Schmidt", "given": "Dirk" } } ] }, "doi": "10.1117/12.2314037", "primary_object": { "basename": "1070306.pdf", "url": "https://authors.library.caltech.edu/records/xtvez-s0671/files/1070306.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Mawet, D.; Bond, C. Z.; et el." }, { "id": "https://authors.library.caltech.edu/records/bpbjn-f5j75", "eprint_id": 98186, "eprint_status": "archive", "datestamp": "2023-08-19 10:23:23", "lastmod": "2024-01-14 21:54:09", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Llop-Sayson-J-D", "name": { "family": "Llop Sayson", "given": "Jorge D." } }, { "id": "Zhang-Manxuan-Rebecca", "name": { "family": "Zhang", "given": "Manxuan (Rebecca)" } }, { "id": "Riggs-A-J-E", "name": { "family": "Riggs", "given": "A. J. Eldorado" }, "orcid": "0000-0002-0863-6228" }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "James K." } } ] }, "title": "Laboratory testing of coronagraphs for future space telescopes on the Caltech high contrast spectroscopy testbed for segmented telescopes (HCST) (Conference Presentation)", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE).", "abstract": "Imaging Earth-like exoplanets with future space telescopes will require a coronagraph instrument that is capable of creating a dark zone in the starlight at the image plane that is ten orders of magnitude fainter than the off-axis image of the host star. What is more, the coronagraph must simultaneously provide a stable dark zone and high throughput over the angular separations that correspond to habitable zones around nearby Sun-like stars (~10-100 milliarcseconds). Since the pupils of most large-aperture space telescope architectures are likely to be obstructed by secondary mirrors, spider support structures, and gaps between mirror segments, the coronagraph optics must also be specially tailored to passively suppress starlight diffracted from the obstructions and discontinuities in the telescope pupil. Here, we demonstrate an apodized vortex coronagraph optimized for an off-axis segmented telescope on the new High Contrast Spectroscopy Testbed for Segmented Telescopes (HCST) at Caltech. The coronagraph consists of a microdot apodizer, a liquid crystal vortex phase mask in the focal plane, and a Lyot stop. The microdot apodizer is an AR-coated glass window with 10um gold microdots to be used in reflection around lambda=800nm. We describe the HCST optical system; the apodizer optimization, fabrication, and metrology procedures; and present end-to-end testbed results of the coronagraph coupled with a 32x32 Boston Micromachines deformable mirror for wavefront control. We aim to achieve a dark zone 10^(-7) times fainter than the simulated host star over a wavelength range of 800\u00b140nm in Spring 2018. Finally, we will outline future plans to demonstrate coronagraph concepts for centrally obscured telescopes.", "date": "2018-07-10", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 106981F", "id_number": "CaltechAUTHORS:20190823-134013721", "isbn": "9781510619494", "book_title": "Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190823-134013721", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Lystrup-M", "name": { "family": "Lystrup", "given": "Mackenzie" } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Fazio-G-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "Batalha-N-M", "name": { "family": "Batalha", "given": "Natalie" } }, { "id": "Siegler-N", "name": { "family": "Siegler", "given": "Nicholas" } }, { "id": "Tong-Edward-C", "name": { "family": "Tong", "given": "Edward C." } } ] }, "doi": "10.1117/12.2312851", "resource_type": "book_section", "pub_year": "2018", "author_list": "Ruane, Garreth; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.edu/records/se6m6-dvt96", "eprint_id": 87811, "eprint_status": "archive", "datestamp": "2023-08-19 10:21:11", "lastmod": "2024-01-14 20:24:37", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Milli-J", "name": { "family": "Milli", "given": "J." }, "orcid": "0000-0001-9325-2511" }, { "id": "Kasper-M", "name": { "family": "Kasper", "given": "M." } }, { "id": "Bourget-P", "name": { "family": "Bourget", "given": "P." } }, { "id": "Pannetier-C", "name": { "family": "Pannetier", "given": "C." } }, { "id": "Mouillet-D", "name": { "family": "Mouillet", "given": "D." } }, { "id": "Sauvage-J-F", "name": { "family": "Sauvage", "given": "J.-F." } }, { "id": "Rayes-C", "name": { "family": "Reyes", "given": "C." } }, { "id": "Fusco-T", "name": { "family": "Fusco", "given": "T." } }, { "id": "Cantalloube-F", "name": { "family": "Cantalloube", "given": "F." } }, { "id": "Tristram-K-R-W", "name": { "family": "Tristram", "given": "K." } }, { "id": "Wahhaj-Z", "name": { "family": "Wahhaj", "given": "Z." }, "orcid": "0000-0001-8269-324X" }, { "id": "Beuzit-J-L", "name": { "family": "Beuzit", "given": "J.-L." } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "J. H." }, "orcid": "0000-0001-8627-0404" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Telle-A", "name": { "family": "Telle", "given": "A." } }, { "id": "Vigan-A", "name": { "family": "Vigan", "given": "A." }, "orcid": "0000-0002-5902-7828" }, { "id": "N'Diaye-M", "name": { "family": "N'Diaye", "given": "M." }, "orcid": "0000-0002-1721-3294" } ] }, "title": "Low wind effect on VLT/SPHERE: impact, mitigation strategy, and results", "ispublished": "unpub", "full_text_status": "public", "keywords": "Low Wind Effect, SPHERE, Radiative Cooling, Spiders, Island Effect", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nJ.M. thanks ESO staff and technical operators at the Paranal Observatory, especially the System & Optics team for their work to apply the low-emissivity coating on the telescope spiders, and the Software team to allow to use an early release of the ESO Data Lab24 for the statistical analysis presented in this paper. He thanks W. Brandner for providing him VLTI data during a night with low wind, to evaluate the symmetry of the PSF on all 4 UTs. He thanks V. Bailey, B. Macintosh, G. Perez, M. Boccas, P. Wizinowich, J. Males, L. Close, J. Lozi and S. Vievard for providing information on the LWE and spiders properties on Gemini South, Magellan, Keck and Subaru telescopes respectively. He thanks P. Figueira for interesting discussion on statistical estimators of the LWE occurence rate. Last but not least, he thanks J. Smoker for his careful english language editing. This research has made use of the following python packages: matplotlib, pandas, scipy and astropy.\n\nPublished - 107032A.pdf
", "abstract": "The low wind effect is a phenomenon disturbing the phase of the wavefront in the pupil of a large telescope obstructed by spiders, in the absence of wind. It can be explained by the radiative cooling of the spiders, creating air temperature inhomogeneities across the pupil. Because it is unseen by traditional adaptive optics (AO) systems, thus uncorrected, it significantly degrades the quality of AO-corrected images. We provide a statistical analysis of the strength of this effect as seen by VLT/SPHERE after 4 years of operations. We analyse its dependence upon the wind and temperature conditions. We describe the mitigation strategy implemented in 2017: a specific coating with low thermal emissivity in the mid-infrared was applied on the spiders of Unit Telescope 3. We quantify the improvement in terms of image quality, contrast and wave front error using both focal plane images and measured phase maps.", "date": "2018-07-10", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107032A", "id_number": "CaltechAUTHORS:20180712-135345877", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180712-135345877", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "Schreiber-L", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-D", "name": { "family": "Schmidt", "given": "Dirk" } } ] }, "doi": "10.1117/12.2311499", "primary_object": { "basename": "107032A.pdf", "url": "https://authors.library.caltech.edu/records/se6m6-dvt96/files/107032A.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Milli, J.; Kasper, M.; et el." }, { "id": "https://authors.library.caltech.edu/records/f4rrd-q3r17", "eprint_id": 87812, "eprint_status": "archive", "datestamp": "2023-08-19 10:21:16", "lastmod": "2024-01-14 20:24:39", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Rodack-A-T", "name": { "family": "Rodack", "given": "Alexander T." } }, { "id": "Males-J-R", "name": { "family": "Males", "given": "Jared R." } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Mazin-B-A", "name": { "family": "Mazin", "given": "Benjamin A." } }, { "id": "Fitzgerald-M-P", "name": { "family": "Fitzgerald", "given": "Michael P." }, "orcid": "0000-0002-0176-8973" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Real-time estimation and correction of quasi-static aberrations in ground-based high contrast imaging systems with high frame-rates", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, Extreme adaptive optics, Active speckle control, Quasi-static speckles, Exoplanets", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was supported in part by NSF ATI Award #1710356 and by NSF MRI Award #1625441. The authors would also like to thank Dr. Richard A. Frazin for his work developing the base algorithm and his support in our endeavors.\n\nPublished - 107032N.pdf
", "abstract": "The success of ground-based, high contrast imaging for the detection of exoplanets in part depends on the ability to differentiate between quasi-static speckles caused by aberrations not corrected by adaptive optics (AO) systems, known as non-common path aberrations (NCPAs), and the planet intensity signal. Frazin (ApJ, 2013) introduced a post-processing algorithm demonstrating that simultaneous millisecond exposures in the science camera and wavefront sensor (WFS) can be used with a statistical inference procedure to determine both the series expanded NCPA coefficients and the planetary signal. We demonstrate, via simulation, that using this algorithm in a closed-loop AO system, real-time estimation and correction of the quasi-static NCPA is possible without separate deformable mirror (DM) probes. Thus the use of this technique allows for the removal of the quasi-static speckles that can be mistaken for planetary signals without the need for new optical hardware, improving the efficiency of ground-based exoplanet detection. In our simulations, we explore the behavior of the Frazin Algorithm (FA) and the dependence of its convergence to an accurate estimate on factors such as Strehl ratio, NCPA strength, and number of algorithm search basis functions. We then apply this knowledge to simulate running the algorithm in real-time in a nearly ideal setting. We then discuss adaptations that can be made to the algorithm to improve its real-time performance, and show their efficacy in simulation. A final simulation tests the technique's resilience against imperfect knowledge of the AO residual phase, motivating an analysis of the feasibility of using this technique in a real closed-loop Extreme AO system such as SCExAO or MagAO-X, in terms of computational complexity and the accuracy of the estimated quasi-static NCPA correction.", "date": "2018-07-10", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107032N", "id_number": "CaltechAUTHORS:20180712-153453502", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180712-153453502", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1710356" }, { "agency": "NSF", "grant_number": "AST-1625441" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "Schreiber-L", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-D", "name": { "family": "Schmidt", "given": "Dirk" } } ] }, "doi": "10.1117/12.2312218", "primary_object": { "basename": "107032N.pdf", "url": "https://authors.library.caltech.edu/records/f4rrd-q3r17/files/107032N.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Rodack, Alexander T.; Males, Jared R.; et el." }, { "id": "https://authors.library.caltech.edu/records/xxe1n-zh490", "eprint_id": 98185, "eprint_status": "archive", "datestamp": "2023-08-19 10:23:19", "lastmod": "2024-01-14 21:54:07", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Simulating high dispersion coronagraphy (HDC) observations for large ground-based telescopes (Conference Presentation)", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE).", "abstract": "Spectroscopy of exoplanets can potentially detect biomarkers in habitable planets around other stars. The high dispersion coronagraphy (HDC) technique provides a pathway to search for biomarkers in planets around M dwarfs with next-generation ground-based extremely large telescopes (ELTs). The HDC consists of a coronagraph operating behind an extreme adaptive optics (AO) system, a single-mode fiber injection unit, and a high resolution spectrometer (HRS). The coronagraph spatially filters out starlight while the HRS spectrally discriminates starlight from planet light, reaching a starlight suppression level that enables biomarker detection. I will simulating ELT HDC instrument performance as a function of wavelength, spectral resolution, starlight suppression, and planet types, considering realistic noise budget that includes speckle noise, thermal and sky background and exozodical background.", "date": "2018-07-10", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107031R", "id_number": "CaltechAUTHORS:20190823-134013622", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190823-134013622", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "Schreiber-L", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-D", "name": { "family": "Schmidt", "given": "Dirk" } } ] }, "doi": "10.1117/12.2312387", "resource_type": "book_section", "pub_year": "2018", "author_list": "Wang, Ji and Mawet, Dimitri" }, { "id": "https://authors.library.caltech.edu/records/yy9gg-w9w54", "eprint_id": 98180, "eprint_status": "archive", "datestamp": "2023-08-19 10:19:42", "lastmod": "2024-01-14 21:53:57", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "Mikael" }, "orcid": "0000-0002-2011-0851" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Carlomagno-B", "name": { "family": "Carlomagno", "given": "Brunella" } }, { "id": "Christiaens-V", "name": { "family": "Christiaens", "given": "Valentin" }, "orcid": "0000-0002-0101-8814" }, { "id": "Defr\u00e8re-D", "name": { "family": "Defr\u00e8re", "given": "Denis" }, "orcid": "0000-0003-3499-2506" }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "Christian" } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien" }, "orcid": "0000-0001-8627-0404" }, { "id": "G\u00f3mez-Gonz\u00e1lez-C-A", "name": { "family": "Gomez Gonzalez", "given": "Carlos A." }, "orcid": "0000-0003-2050-1710" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "Serge" } }, { "id": "Hinz-P-M", "name": { "family": "Hinz", "given": "Philip" }, "orcid": "0000-0002-1954-4564" }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "Elsa" } }, { "id": "Jolivet-A", "name": { "family": "Jolivet", "given": "Aissa" } }, { "id": "Kasper-M", "name": { "family": "Kasper", "given": "Markus" } }, { "id": "K\u00e4ufl-H-U", "name": { "family": "K\u00e4ufl", "given": "Hans-Ulrich" } }, { "id": "Kenworthy-M-A", "name": { "family": "Kenworthy", "given": "Matthew" }, "orcid": "0000-0002-7064-8270" }, { "id": "Matthews-Keith-Astronomy", "name": { "family": "Matthews", "given": "Keith" } }, { "id": "Milli-J", "name": { "family": "Milli", "given": "Julien" }, "orcid": "0000-0001-9325-2511" }, { "id": "Orban-de-Xivry-G", "name": { "family": "Orban de Xivry", "given": "Gilles" }, "orcid": "0000-0002-4790-415X" }, { "id": "Pantin-E-J", "name": { "family": "Pantin", "given": "Eric" } }, { "id": "Piron-P", "name": { "family": "Piron", "given": "Pierre" } }, { "id": "Reggiani-M", "name": { "family": "Reggiani", "given": "Maddalena" }, "orcid": "0000-0003-2911-0898" }, { "id": "Riggs-A-J-E", "name": { "family": "Riggs", "given": "A. J. Eldorado" }, "orcid": "0000-0002-0863-6228" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" }, { "id": "Vargas-Catalan-E", "name": { "family": "Vargas Catalan", "given": "Ernesto" } } ] }, "title": "Around the world: status and prospects with the infrared vortex coronagraph (Conference Presentation)", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE).", "abstract": "Since its first light at the VLT in 2012, the Annular Groove Phase Mask (AGPM) has been used to implement vortex coronagraphy into AO-assisted infrared cameras at two additional world-leading observatories: the Keck Observatory and the LBT. In this paper, we review the status of these endeavors, and briefly highlight the main scientific results obtained so far. We explore the performance of the AGPM vortex coronagraph as a function of instrumental constraints, and identify the main limitations to the sensitivity to faint, off-axis companions in high-contrast imaging. These limitations include the AGPM itself, non-common path aberrations, as well as the data processing pipeline; we briefly describe our on-going efforts to further improve these various aspects. Based on the lessons learned from the first five years of on-sky exploitation of the AGPM, we are now preparing its implementation in a new generation of high-contrast imaging instruments. We detail the specificities of these instruments, and how they will enable the full potential of vortex coronagraphy to be unleashed in the future. In particular, we explain how the AGPM will be used to hunt for planets in the habitable zone of alpha Centauri A and B with a refurbished, AO-assisted version of the VISIR mid-infrared camera at the VLT (aka the NEAR project), and how this project paves the way towards mid-infrared coronagraphy on the ELT with the METIS instrument. We also discuss future LM-band applications of the AGPM with VLT/ERIS, ELT/METIS, and with a proposed upgrade of Keck/NIRC2, as well as future applications at shorter wavelengths, such as a possible upgrade of VLT/SPHERE with a K-band AGPM.", "date": "2018-07-09", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107020T", "id_number": "CaltechAUTHORS:20190823-134013036", "isbn": "9781510619579", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190823-134013036", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Simard-L", "name": { "family": "Simard", "given": "Luc" } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2312783", "resource_type": "book_section", "pub_year": "2018", "author_list": "Absil, Olivier; Karlsson, Mikael; et el." }, { "id": "https://authors.library.caltech.edu/records/7ccz1-1xq59", "eprint_id": 88138, "eprint_status": "archive", "datestamp": "2023-08-19 10:18:11", "lastmod": "2024-01-14 20:29:19", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "N." } }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "D." }, "orcid": "0000-0002-1583-2040" }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "J. R." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Fucik-J-R", "name": { "family": "Fucik", "given": "J." } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. K." } }, { "id": "Coker-C-T", "name": { "family": "Coker", "given": "C." }, "orcid": "0000-0002-9954-7887" }, { "id": "Delacroix-A", "name": { "family": "Delacroix", "given": "A." } }, { "id": "Levraud-N", "name": { "family": "Levraud", "given": "N." } }, { "id": "Llop-Sayson-J-D", "name": { "family": "Llop Sayson", "given": "Jorge" } }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "J." }, "orcid": "0000-0002-4361-8885" }, { "id": "Riddle-R-L", "name": { "family": "Riddle", "given": "R." }, "orcid": "0000-0002-0387-370X" }, { "id": "Millar-Blanchaer-M-A", "name": { "family": "Millar-Blanchaer", "given": "M. A." }, "orcid": "0000-0001-6205-9233" } ] }, "title": "High-contrast spectroscopy testbed for Segmented Telescopes: instrument overview and development progress", "ispublished": "unpub", "full_text_status": "public", "keywords": "Wavefront sensing, common path wavefront sensing, coherent differential imaging, high contrast imaging, exoplanets", "note": "\u00a9 2018 Society of Photo-optical Instrumentation Engineers (SPIE).\n\nThe authors would like to acknowledge the financial support of the Heising-Simons foundation. G. Ruane is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444. This work was also supported by the Exoplanet Exploration Program (ExEP), Jet Propulsion Laboratory, California Institute of Technology, under contract to NASA.\n\nPublished - 107024E.pdf
Submitted - 1807.07020.pdf
", "abstract": "The High Contrast spectroscopy testbed for Segmented Telescopes (HCST) is being developed at Caltech. It aims at addressing the technology gap for future exoplanet imagers and providing the U.S. community with an academic facility to test components and techniques for high contrast imaging, focusing on segmented apertures proposed for future ground-based (TMT, ELT) and space-based telescopes (HabEx, LUVOIR). We present an overview of the design of the instrument and a detailed look at the testbed build and initial alignment. We offer insights into stumbling blocks encountered along the path and show that the testbed is now operational and open for business. We aim to use the testbed in the future for testing of high contrast imaging techniques and technologies with amongst with thing, a TMT-like pupil.", "date": "2018-07-09", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107024E", "id_number": "CaltechAUTHORS:20180723-151740832", "isbn": "9781510619579", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180723-151740832", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation" }, { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Simard-L", "name": { "family": "Simard", "given": "Luc" } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2314325", "primary_object": { "basename": "107024E.pdf", "url": "https://authors.library.caltech.edu/records/7ccz1-1xq59/files/107024E.pdf" }, "related_objects": [ { "basename": "1807.07020.pdf", "url": "https://authors.library.caltech.edu/records/7ccz1-1xq59/files/1807.07020.pdf" } ], "resource_type": "book_section", "pub_year": "2018", "author_list": "Jovanovic, N.; Ruane, G.; et el." }, { "id": "https://authors.library.caltech.edu/records/pzv5v-0gv93", "eprint_id": 92173, "eprint_status": "archive", "datestamp": "2023-08-19 10:16:24", "lastmod": "2024-01-14 21:25:24", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "J. R." } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "N." } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. K." } }, { "id": "Bartos-R-D", "name": { "family": "Bartos", "given": "R. D." } }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "D." }, "orcid": "0000-0002-1583-2040" }, { "id": "Bond-C-Z", "name": { "family": "Bond", "given": "C. Z." } }, { "id": "Cetre-S", "name": { "family": "Cetre", "given": "S." } }, { "id": "Lilley-S", "name": { "family": "Lilley", "given": "S." } }, { "id": "Jacobson-S", "name": { "family": "Jacobson", "given": "S." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "P. L." }, "orcid": "0000-0002-1646-442X" }, { "id": "Fitzgerald-M-P", "name": { "family": "Fitzgerald", "given": "M." }, "orcid": "0000-0002-0176-8973" } ] }, "title": "First version of the fiber injection unit for the Keck Planet Imager and Characterizer", "ispublished": "unpub", "full_text_status": "public", "keywords": "Adaptive Optics, High contrast imaging, High resolution spectroscopy, Exoplanet characterization, Doppler imaging", "note": "\u00a9 2018 Society of Photo-optical Instrumentation Engineers (SPIE). \n\nThe W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The near-infrared pyramid wavefront sensor is supported by the National Science Foundation under Grant No. AST-1611623. The fiber injection unit is supported by the Heising-Simons Foundation. The PWS camera was provided by Don Hall as part of his National Science Foundation funding under Grant No. AST 1106391.\n\nPublished - 1070225.pdf
", "abstract": "Coupling a high-contrast imaging instrument to a high-resolution spectrograph has the potential to enable the most detailed characterization of exoplanet atmospheres, including spin measurements and Doppler mapping. The high-contrast imaging system serves as a spatial filter to separate the light from the star and the planet while the high-resolution spectrograph acts as a spectral filter, which differentiates between features in the stellar and planetary spectra. The Keck Planet Imager and Characterizer (KPIC) located downstream from the current W. M. Keck II adaptive optics (AO) system will contain a fiber injection unit (FIU) combining a high-contrast imaging system and a fiber feed to Keck's high resolution infrared spectrograph NIRSPEC. Resolved thermal emission from known young giant exoplanets will be injected into a single-mode fiber linked to NIRSPEC, thereby allowing the spectral characterization of their atmospheres. Moreover, the resolution of NIRSPEC (R = 37,500 after upgrade) is high enough to enable spin measurements and Doppler imaging of atmospheric weather phenomenon. The module was integrated at Caltech and shipped to Hawaii at the beginning of 2018 and is currently undergoing characterization. Its transfer to Keck is planned in September and first on-sky tests sometime in December.", "date": "2018-07-06", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1070225", "id_number": "CaltechAUTHORS:20190109-125342618", "isbn": "9781510619579", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190109-125342618", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" }, { "agency": "NSF", "grant_number": "AST-1611623" }, { "agency": "Heising-Simons Foundation" }, { "agency": "NSF", "grant_number": "AST-1106391" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Simard-L", "name": { "family": "Simard", "given": "Luc" } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2310063", "primary_object": { "basename": "1070225.pdf", "url": "https://authors.library.caltech.edu/records/pzv5v-0gv93/files/1070225.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Delorme, J. R.; Jovanovic, N.; et el." }, { "id": "https://authors.library.caltech.edu/records/dkxah-vz065", "eprint_id": 87993, "eprint_status": "archive", "datestamp": "2023-08-19 10:14:32", "lastmod": "2024-01-14 20:28:39", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Kassis-M", "name": { "family": "Kassis", "given": "Marc" } }, { "id": "Chan-Dwight", "name": { "family": "Chan", "given": "Dwight" } }, { "id": "Kwok-Shui", "name": { "family": "Kwok", "given": "Shui" } }, { "id": "Krasuski-T", "name": { "family": "Krasuski", "given": "Tomas" } }, { "id": "Lyke-J-E", "name": { "family": "Lyke", "given": "James E." } }, { "id": "Ragland-S-D", "name": { "family": "Ragland", "given": "Sam" } }, { "id": "Lilley-S-J", "name": { "family": "Lilley", "given": "Scott" } }, { "id": "Cetre-S", "name": { "family": "Cetre", "given": "Sylvain" } }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "id": "Lewis-H-A", "name": { "family": "Lewis", "given": "Hilton A." } }, { "id": "Gomez-P", "name": { "family": "Gomez", "given": "Percy" } }, { "id": "Rizzi-L", "name": { "family": "Rizzi", "given": "Luca" }, "orcid": "0000-0003-0882-2327" }, { "id": "Larkin-J-E", "name": { "family": "Larkin", "given": "James E." }, "orcid": "0000-0001-7687-3965" }, { "id": "Do-Tuan", "name": { "family": "Do", "given": "Tuan" }, "orcid": "0000-0001-9554-6062" }, { "id": "Fitzgerald-M-P", "name": { "family": "Fitzgerald", "given": "Michael P." }, "orcid": "0000-0002-0176-8973" }, { "id": "Skemer-A-J", "name": { "family": "Skemer", "given": "Andy" }, "orcid": "0000-0001-6098-3924" }, { "id": "Prochaska-J-X", "name": { "family": "Prochaska", "given": "J. Xavier" }, "orcid": "0000-0002-7738-6875" }, { "id": "Westfall-K-B", "name": { "family": "Westfall", "given": "Kyle" } }, { "id": "Mazin-B-A", "name": { "family": "Mazin", "given": "Ben" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Matthews-Keith-Astronomy", "name": { "family": "Matthews", "given": "Keith" } }, { "id": "Martin-D-Christopher", "name": { "family": "Martin", "given": "Christopher" }, "orcid": "0000-0002-8650-1644" }, { "id": "Howard-A-W", "name": { "family": "Howard", "given": "Andrew W." }, "orcid": "0000-0001-8638-0320" }, { "id": "Lu-Jessica-R", "name": { "family": "Lu", "given": "Jessica R." }, "orcid": "0000-0001-9611-0009" }, { "id": "Chun-Mark-R", "name": { "family": "Chun", "given": "Mark R." } } ] }, "title": "Innovations and advances in instrumentation at the W. M. Keck Observatory", "ispublished": "unpub", "full_text_status": "public", "keywords": "Infrared, Instrumentation, Integral Field, Laser Guide Star, Spectrograph, Telescope Control, Adaptive Optics", "note": "\u00a9 2018 Society of Photo-optical Instrumentation Engineers (SPIE). \n\nThe data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. We wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. \n\nFor the projects described in this paper, there are several sources of funding we wish to acknowledge. The development of the blue channel of KCWI is supported in part by a grant from National Science Foundation under Scientific Program Order No. 5 as issued for support of the Telescope Systems Instrumentation Program (TSIP), in accordance with Proposal No. AST-0335461 submitted by AURA. Support for KCWI has also come from the Heising-Simons Foundation and the Mount Cuba Foundation. KCRM is supported in part by the National Science Foundation under Grant No. AST-1429890. The OSIRIS spectrograph upgrade including DRP development is supported by the National Science Foundation under Grant No. AST-1311102 while the imager upgrade project is supported by funding from the Gordon and Betty Moore Foundation. K1DM3 is supported in part by the National Science Foundation under Grant No. AST-1337609. The NIRSPEC upgrade is supported in part by the National Science Foundation under Grant No. AST-1532315 and by the Heising-Simons Foundation. The wave front controller supported by the National Science Foundation under Grant AST-1727071. Development of KPF is supported by the Heising-Simons Foundation.\n\nPublished - 1070207.pdf
", "abstract": "Since the start of operations in 1993, the twin 10 meter W. M. Keck Observatory telescopes have continued to maximize their scientific impact and to produce transformative discoveries that keep the observing community on the frontiers of astronomical research. Upgraded capabilities and new instrumentation are provided though collaborative partnerships with Caltech and UC instrument development teams. The observatory adapts and responds to the observers' evolving needs as defined in the observatory's strategic plan, periodically refreshed in collaboration with the science community. This paper summarizes the performance of recently commissioned infrastructure projects, technology upgrades, and new additions to the suite of instrumentation at the observatory. We will also provide a status of projects currently in the design or development phase, and since we need to keep our eye on the future, we mention projects in exploratory phases that originate from our strategic plan. Recently commissioned projects include telescope control system upgrades, OSIRIS spectrometer and imager upgrades, and deployments of the Keck Cosmic Web Imager (KCWI), the Near-Infrared Echellette Spectrometer (NIRES), and the Keck I Deployable Tertiary Mirror (KIDM3). Under development are upgrades to the NIRSPEC instrument and adaptive optics (AO) system. Major instrumentation in design phases include the Keck Cosmic Reionization Mapper and the Keck Planet Finder. Future instrumentation studies and proposals underway include a Ground Layer Adaptive Optics system, NIRC2 upgrades, the energy sensitive instrument KRAKENS, an integral field spectrograph LIGER, and a laser tomography AO upgrade. Last, we briefly discuss recovering MOSFIRE and its return to science operations.", "date": "2018-07-06", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1070207", "id_number": "CaltechAUTHORS:20180719-102954010", "isbn": "9781510619579", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180719-102954010", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" }, { "agency": "NSF", "grant_number": "AST-0335461" }, { "agency": "Heising-Simons Foundation" }, { "agency": "Mt. Cuba Astronomical Foundation" }, { "agency": "NSF", "grant_number": "AST-1429890" }, { "agency": "NSF", "grant_number": "AST-1311102" }, { "agency": "Gordon and Betty Moore Foundation" }, { "agency": "NSF", "grant_number": "AST-1337609" }, { "agency": "NSF", "grant_number": "AST-1532315" }, { "agency": "NSF", "grant_number": "AST-1727071" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Simard-L", "name": { "family": "Simard", "given": "Luc" } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2312316", "primary_object": { "basename": "1070207.pdf", "url": "https://authors.library.caltech.edu/records/dkxah-vz065/files/1070207.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Kassis, Marc; Chan, Dwight; et el." }, { "id": "https://authors.library.caltech.edu/records/c5jpb-h5t97", "eprint_id": 92119, "eprint_status": "archive", "datestamp": "2023-08-19 10:16:04", "lastmod": "2024-01-14 21:24:38", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "K\u00e4ufl-H-U", "name": { "family": "K\u00e4ufl", "given": "Hans-Ulrich" } }, { "id": "Kasper-M", "name": { "family": "Kasper", "given": "Markus" } }, { "id": "Arsenault-R", "name": { "family": "Arsenault", "given": "Robin" } }, { "id": "Jakob-G", "name": { "family": "Jakob", "given": "Gerd" } }, { "id": "Leveratto-S", "name": { "family": "Leveratto", "given": "Serban" } }, { "id": "Zins-G", "name": { "family": "Zins", "given": "G\u00e9rard" } }, { "id": "Fuenteseca-E", "name": { "family": "Fuenteseca", "given": "Eloy" } }, { "id": "Riquelme-M", "name": { "family": "Riquelme", "given": "Miguel" } }, { "id": "Siebenmorgen-R", "name": { "family": "Siebenmorgen", "given": "Ralf" } }, { "id": "Sterzik-M", "name": { "family": "Sterzik", "given": "Michael" } }, { "id": "Ageorges-N", "name": { "family": "Ageorges", "given": "Nancy" } }, { "id": "Gutruf-S", "name": { "family": "Gutruf", "given": "Sven" } }, { "id": "Kampf-D", "name": { "family": "Kampf", "given": "Dirk" } }, { "id": "Reutlinger-A", "name": { "family": "Reutlinger", "given": "Arnd" } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Carlomagno-B", "name": { "family": "Carlomagno", "given": "Brunella" } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Klupar-P", "name": { "family": "Klupar", "given": "Peter" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "Mikael" }, "orcid": "0000-0002-2011-0851" }, { "id": "Pantin-E", "name": { "family": "Pantin", "given": "Eric" } }, { "id": "Dohlen-K", "name": { "family": "Dohlen", "given": "Kjetil" } } ] }, "title": "NEAR: New Earths in the Alpha Cen Region (bringing VISIR as a \"visiting instrument\" to ESO-VLT-UT4)", "ispublished": "unpub", "full_text_status": "public", "keywords": "exo-Earth, alpha-Cen, habitable zone, coronagraphy, apodization, extreme AO, thermal infrared", "note": "\u00a9 2018 Society of Photo-optical Instrumentation Engineers (SPIE).\n\nThis project was only possible with the enthusiastic support of many staff at ESO, but also in the community.\nOf particular importance is a grant by the Breakthrough Initiatives and the generous offer of DDT by ESO's\nDirector General.\n\nPublished - 107020D.pdf
", "abstract": "By adding a dedicated coronagraph, ESO in collaboration with the Breakthrough Initiatives, modifies the Very Large Telescope mid-IR imager (VISIR) to further boost the high dynamic range imaging capability this instru- ment has. After the VISIR upgrade in 2012, where coronagraphic masks were first added to VISIR, it became evident that coronagraphy at a ground-based 8m-class telescope critically needs adaptive optics, even at wavelengths as long as 10\u03bcm. For VISIR, a work-horse observatory facility instrument in normal operations, this is \"easiest\" achieved by bringing VISIR as a visiting instrument to the ESO-VLT-UT4 having an adaptive M2. This \"visit\" enables a meaningful search for Earth-like planets in the habitable zone around both \u03b1-Cen1,2. Meaningful here means, achieving a contrast of \u2248 10^(-6) within \u2248 0.8arcsec from the star while maintaining basically the normal sensitivity of VISIR. This should allow to detect a planet twice the diameter of Earth. Key components will be a diffractive coronagraphic mask, the annular groove phase mask (AGPM), optimized for the most sensitive spectral band-pass in the N-band, complemented by a sophisticated apodizer at the level of the Lyot stop. For VISIR noise filtering based on fast chopping is required. A novel internal chopper system will be integrated into the cryostat. This chopper is based on the standard technique from early radio astronomy, conceived by the microwave pioneer Robert Dicke in 1946, which was instrumental for the discovery of the 3K radio background.", "date": "2018-07-06", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107020D", "id_number": "CaltechAUTHORS:20190107-142202163", "isbn": "9781510619579", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190107-142202163", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Simard-L", "name": { "family": "Simard", "given": "Luc" } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2313395", "primary_object": { "basename": "107020D.pdf", "url": "https://authors.library.caltech.edu/records/c5jpb-h5t97/files/107020D.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "K\u00e4ufl, Hans-Ulrich; Kasper, Markus; et el." }, { "id": "https://authors.library.caltech.edu/records/k6xfx-x0d65", "eprint_id": 98179, "eprint_status": "archive", "datestamp": "2023-08-19 10:16:42", "lastmod": "2024-01-14 21:53:56", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Morgan-R-M", "name": { "family": "Morgan", "given": "Rhonda" } }, { "id": "Warfield-K-R", "name": { "family": "Warfield", "given": "Keith" } }, { "id": "Kuan-Gary", "name": { "family": "Kuan", "given": "Gary" } }, { "id": "Stahl-H-P", "name": { "family": "Stahl", "given": "H. Phi" } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Balasubramanian-B", "name": { "family": "Balasubramanian", "given": "Bala" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Nikzad-S", "name": { "family": "Nikzad", "given": "Shouleh" } }, { "id": "Nissen-J-A", "name": { "family": "Nissen", "given": "Joel" } }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Stapelfeldt-K-R", "name": { "family": "Stapelfeldt", "given": "Karl" }, "orcid": "0000-0002-2805-7338" }, { "id": "Warwick-S", "name": { "family": "Warwick", "given": "Steve" } } ] }, "title": "Technology maturity for the habitable-zone exoplanet imaging observatory (HabEx) concept", "ispublished": "unpub", "full_text_status": "public", "keywords": "exoplanets, technology gaps, HabEx, detectors, coronagraph, starshade, deformable mirror", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe HabEx Concept design is pre-decisional information presented for planning and discussion purposes only. This work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.\n\nPublished - 106980S.pdf
", "abstract": "HabEx Architecture A is a 4m unobscured telescope mission concept optimized for direct imaging and spectroscopy of potentially habitable exoplanets, and also enables a wide range of general astrophysics science. The exoplanet detection and characterization drives the enabling core technologies. A hybrid starlight suppression approach of a starshade and coronagraph diversifies technology maturation risk. In this paper we assess these exoplanet-driven technologies, including elements of coronagraphs, starshades, mirrors, jitter mitigation, wavefront control, and detectors. By utilizing high technology readiness solutions where feasible, and identifying required technology development that can begin early, HabEx will be well positioned for assessment by the community in 2020 Astrophysics Decadal Survey.", "date": "2018-07-06", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 106980S", "id_number": "CaltechAUTHORS:20190823-134012861", "isbn": "9781510619494", "book_title": "Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190823-134012861", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Lystrup-M", "name": { "family": "Lystrup", "given": "Mackenzie" } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Fazio-G-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "Batalha-N-M", "name": { "family": "Batalha", "given": "Natalie" } }, { "id": "Siegler-N", "name": { "family": "Siegler", "given": "Nicholas" } }, { "id": "Tong-Edward-C", "name": { "family": "Tong", "given": "Edward C." } } ] }, "doi": "10.1117/12.2313845", "primary_object": { "basename": "106980S.pdf", "url": "https://authors.library.caltech.edu/records/k6xfx-x0d65/files/106980S.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Morgan, Rhonda; Warfield, Keith; et el." }, { "id": "https://authors.library.caltech.edu/records/9v1fq-a6a63", "eprint_id": 92049, "eprint_status": "archive", "datestamp": "2023-08-19 10:15:44", "lastmod": "2024-02-02 21:12:04", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Tinyanont-S", "name": { "family": "Tinyanont", "given": "Samaporn" }, "orcid": "0000-0002-1481-4676" }, { "id": "Millar-Blanchaer-M-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell" }, "orcid": "0000-0001-6205-9233" }, { "id": "Nilsson-R", "name": { "family": "Nilsson", "given": "Ricky" }, "orcid": "0000-0002-5408-4954" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Knutson-H-A", "name": { "family": "Knutson", "given": "Heather" }, "orcid": "0000-0002-5375-4725" }, { "id": "Kataria-T", "name": { "family": "Kataria", "given": "Tiffany" }, "orcid": "0000-0003-3759-9080" }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" }, { "id": "Henderson-C-P", "name": { "family": "Henderson", "given": "Charles" } }, { "id": "Matthews-Keith-Astronomy", "name": { "family": "Matthews", "given": "Keith" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Milburn-J-W", "name": { "family": "Milburn", "given": "Jennifer W." } }, { "id": "Hale-D-D-S", "name": { "family": "Hale", "given": "David" } }, { "id": "Smith-R-M", "name": { "family": "Smith", "given": "Roger" } }, { "id": "Vissapragada-S", "name": { "family": "Vissapragada", "given": "Shreyas" }, "orcid": "0000-0003-2527-1475" } ] }, "title": "WIRC+Pol: low-resolution near-infrared spectropolarimeter", "ispublished": "unpub", "full_text_status": "public", "keywords": "spectropolarimetry, polarization grating", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nWIRC+Pol instrument upgrade was funded by Mt. Cuba Astronomical Foundation. We thank Paulo Miles-P\u00e1ez for providing us polarized spectra of Elia 2-25 polarized standard star for comparison with our observations and for discussions on best practices in reducing near-infrared spectropolarimetric data. We thank staff of Palomar Observatory for assisting our observations. Palomar Observatory is operated by a collaboration between California Institute of Technology, Jet Propulsion Laboratory, Yale University, and National Astronomical Observatories of China.\n\nPublished - 107023J.pdf
", "abstract": "WIRC+Pol is a newly commissioned low-resolution (R 100), near-infrared (J and H bands) spectropolarimetry mode of the Wide-field InfraRed Camera (WIRC) on the 200-inch Hale Telescope at Palomar Observatory. The instrument utilizes a novel polarimeter design based on a quarter-wave plate and a polarization grating (PG), which provides full linear polarization measurements (Stokes I, Q, and U ) in one exposure with no need for a polarimetric modulator. The PG also has high transmission across the J and H bands. The instrument is situated at the prime focus of an equatorially mounted telescope. As a result, the system only has one reflection in the light path and the instrument does not rotate with respect to the sky, which provides minimal and stable telescope induced polarization. A data reduction pipeline has been developed for WIRC+Pol to produce linear polarization measurements from observations, allowing, e.g., real-time monitoring of the signal-to-noise ratio of ongoing observations. WIRC+Pol has been on-sky since February 2017. Results from the first year commissioning data show that the instrument has a high dispersion efficiency as expected from the polarization grating. We discuss instrumental systematics we have uncovered in the data, their potential causes, along with calibrations that are necessary to eliminate them. We demonstrate the polarimetric stability of the instrument with RMS variation at 0.2% level over 30 minutes for a bright standard star (J = 8.7). While the spectral extraction is photon noise limited, polarization calibration between sources remain limited by systematics.", "date": "2018-07-06", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107023J", "id_number": "CaltechAUTHORS:20190103-153503630", "isbn": "9781510619579", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190103-153503630", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Mt. Cuba Astronomical Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Division-of-Geological-and-Planetary-Sciences" } ] }, "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Chriostopher J." } }, { "id": "Simard-L", "name": { "family": "Simard", "given": "Luc" } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2314161", "primary_object": { "basename": "107023J.pdf", "url": "https://authors.library.caltech.edu/records/9v1fq-a6a63/files/107023J.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Tinyanont, Samaporn; Millar-Blanchaer, Maxwell; et el." }, { "id": "https://authors.library.caltech.edu/records/1se8z-kch33", "eprint_id": 87166, "eprint_status": "archive", "datestamp": "2023-08-19 07:26:52", "lastmod": "2024-01-14 20:15:09", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "J. R." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Fucik-J-R", "name": { "family": "Fucik", "given": "J." } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. K." } }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "N." } }, { "id": "Klimovich-N-S", "name": { "family": "Klimovich", "given": "N. S." } }, { "id": "Llop-Sayson-J-D", "name": { "family": "Llop Sayson", "given": "J. D." } }, { "id": "Zhang-R", "name": { "family": "Zhang", "given": "R." } }, { "id": "Xin-Yeyuan", "name": { "family": "Xin", "given": "Y." } }, { "id": "Riddle-R-L", "name": { "family": "Riddle", "given": "R." }, "orcid": "0000-0002-0387-370X" }, { "id": "Dekany-R-G", "name": { "family": "Dekany", "given": "R." } }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "J." }, "orcid": "0000-0002-4361-8885" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9." }, "orcid": "0000-0002-9173-0740" }, { "id": "Xuan-Wenhao-Jerry", "name": { "family": "Xuan", "given": "W." }, "orcid": "0000-0002-6618-1137" }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "D." }, "orcid": "0000-0002-1583-2040" }, { "id": "Randolph-M", "name": { "family": "Randolph", "given": "M." } }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "G." }, "orcid": "0000-0002-1871-6264" }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "B." }, "orcid": "0000-0003-4205-4800" } ] }, "title": "High-contrast spectroscopy testbed for segmented telescopes", "ispublished": "unpub", "full_text_status": "public", "keywords": "Instrumentation, Testbed, Segmented Telescopes Simulator, High contrast imaging, Wavefront\ncontrol, High Spectral Resolution, High Dispersion Coronagraphy", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe authors would like to acknowledge the financial support of the Heising-Simons foundation. G. Ruane is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444. This work was also supported by the Exoplanet Exploration Program (ExEP), Jet Propulsion Laboratory, California Institute of Technology, under contract to NASA. Finally, we would like to thank Rowan Swain for proofreading the manuscript.\n\nPublished - 104000X.pdf
", "abstract": "The High Contrast Spectroscopy Testbed for Segmented Telescopes (HCST) at Caltech is aimed at filling gaps in technology for future exoplanet imagers and providing the U.S. community with an academic facility to test components and techniques for high contrast imaging with future segmented ground-based telescope (TMT, E-ELT) and space-based telescopes (HabEx, LUVOIR). The HCST will be able to simulate segmented telescope geometries up to 1021 hexagonal segments and time-varying external wavefront disturbances. It also contains a wavefront corrector module based on two deformable mirrors followed by a classical 3-plane single-stage corona- graph (entrance apodizer, focal-plane mask, Lyot stop) and a science instrument. The back-end instrument will consist of an imaging detector and a high-resolution spectrograph, which is a unique feature of the HCST. The spectrograph instrument will utilize spectral information to characterize simulated planets at the photon-noise limit, measure the chromaticity of new optimized coronagraph and wavefront control concepts, and test the overall scientific functions of high-resolution spectrographs on future segmented telescopes.", "date": "2018-01-22", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 104000X", "id_number": "CaltechAUTHORS:20180615-144222840", "isbn": "9781510612570", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VIII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180615-144222840", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation" }, { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2274893", "primary_object": { "basename": "104000X.pdf", "url": "https://authors.library.caltech.edu/records/1se8z-kch33/files/104000X.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Delorme, J. R.; Mawet, D.; et el." }, { "id": "https://authors.library.caltech.edu/records/d304f-dbb04", "eprint_id": 84865, "eprint_status": "archive", "datestamp": "2023-08-19 05:07:31", "lastmod": "2024-01-14 19:31:11", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Jewell-J-B", "name": { "family": "Jewell", "given": "Jeffrey" } }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Redding-D-C", "name": { "family": "Redding", "given": "Dave" } } ] }, "title": "Optimization of coronagraph design for segmented aperture telescopes", "ispublished": "unpub", "full_text_status": "public", "keywords": "vortex coronagraph, optimization, deformable mirrors, apodization", "note": "\u00a9 2017 SPIE. \n\nWe thank Matthew Bolcar (NASA Goddard Space Flight Center) for providing the aperture for the LUVOIR architecture 'A' design used in this paper. This work was partially performed at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Adminstration. Government sponsorship acknowledged.\n\nPublished - 104000H.pdf
", "abstract": "The goal of directly imaging Earth-like planets in the habitable zone of other stars has motivated the design of coronagraphs for use with large segmented aperture space telescopes. In order to achieve an optimal trade-off between planet light throughput and diffracted starlight suppression, we consider coronagraphs comprised of a stage of phase control implemented with deformable mirrors (or other optical elements), pupil plane apodization masks (gray scale or complex valued), and focal plane masks (either amplitude only or complex-valued, including phase only such as the vector vortex coronagraph). The optimization of these optical elements, with the goal of achieving 10 or more orders of magnitude in the suppression of on-axis (starlight) diffracted light, represents a challenging non-convex optimization problem with a nonlinear dependence on control degrees of freedom. We develop a new algorithmic approach to the design optimization problem, which we call the \"Auxiliary Field Optimization\" (AFO) algorithm. The central idea of the algorithm is to embed the original optimization problem, for either phase or amplitude (apodization) in various planes of the coronagraph, into a problem containing additional degrees of freedom, specifically fictitious \"auxiliary\" electric fields which serve as targets to inform the variation of our phase or amplitude parameters leading to good feasible designs. We present the algorithm, discuss details of its numerical implementation, and prove convergence to local minima of the objective function (here taken to be the intensity of the on-axis source in a \"dark hole\" region in the science focal plane). Finally, we present results showing application of the algorithm to both unobscured off-axis and obscured on-axis segmented telescope aperture designs. The application of the AFO algorithm to the coronagraph design problem has produced solutions which are capable of directly imaging planets in the habitable zone, provided end-to-end telescope system stability requirements can be met. Ongoing work includes advances of the AFO algorithm reported here to design in additional robustness to a resolved star, and other phase or amplitude aberrations to be encountered in a real segmented aperture space telescope.", "date": "2017-09-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "id_number": "CaltechAUTHORS:20180216-092345021", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180216-092345021", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2274574", "primary_object": { "basename": "104000H.pdf", "url": "https://authors.library.caltech.edu/records/d304f-dbb04/files/104000H.pdf" }, "resource_type": "book_section", "pub_year": "2017", "author_list": "Jewell, Jeffrey; Ruane, Garreth; et el." }, { "id": "https://authors.library.caltech.edu/records/7f1w5-32072", "eprint_id": 84862, "eprint_status": "archive", "datestamp": "2023-08-19 05:01:37", "lastmod": "2024-01-14 19:31:05", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "J. R." } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "N." } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. K." } }, { "id": "Bartos-R-D", "name": { "family": "Bartos", "given": "R. D." } }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "P. L." }, "orcid": "0000-0002-1646-442X" }, { "id": "Fitzgerald-M-P", "name": { "family": "Fitzgerald", "given": "M." }, "orcid": "0000-0002-0176-8973" }, { "id": "Lilley-S", "name": { "family": "Lilley", "given": "S." } }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "J." }, "orcid": "0000-0002-4361-8885" }, { "id": "Klimovich-N-S", "name": { "family": "Klimovich", "given": "N." } }, { "id": "Xin-Yeyuan", "name": { "family": "Xin", "given": "Y." } } ] }, "title": "A fiber injection unit for the Keck Planet Imager and Characterizer (KPIC)", "ispublished": "unpub", "full_text_status": "public", "keywords": "Adaptive Optics, High contrast imaging, High resolution spectroscopy, Exoplanet characterization, Doppler imaging", "note": "\u00a9 2017 SPIE.\n\nThe authors would like to acknowledge the financial support of the Heising-Simons foundation. This work was partially carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. Finally, we would like to thank Rowan Swain for proofreading the manuscript.\n\nPublished - 1040029.pdf
", "abstract": "Coupling a high-contrast imaging instrument to a high-resolution spectrograph has the potential to enable the most detailed characterization of exoplanet atmospheres, including spin measurements and Doppler mapping. The high-contrast imaging system serves as a spatial filter to separate the light from the star and the planet while the high-resolution spectrograph acts as a spectral filter, which differentiates between features in the stellar and planetary spectra. The Keck Planet Imager and Characterizer (KPIC) located downstream from the current W. M. Keck II adaptive optics (AO) system will contain a fiber injection unit (FIU) combining a high-contrast imaging system and a fiber feed to Keck's high resolution infrared spectrograph NIRSPEC. Resolved thermal emission from known young giant exoplanets will be injected into a single-mode fiber linked to NIRSPEC, thereby allowing the spectral characterization of their atmospheres. Moreover, the resolution of NIRSPEC (R = 37,500) is high enough to enable spin measurements and Doppler imaging of atmospheric weather phenomenon. The module will be integrated and tested at Caltech before being transferred to Keck in 2018.", "date": "2017-09-01", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "id_number": "CaltechAUTHORS:20180216-085457592", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180216-085457592", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2274891", "primary_object": { "basename": "1040029.pdf", "url": "https://authors.library.caltech.edu/records/7f1w5-32072/files/1040029.pdf" }, "resource_type": "book_section", "pub_year": "2017", "author_list": "Mawet, D.; Delorme, J. R.; et el." }, { "id": "https://authors.library.caltech.edu/records/51ncn-fmp90", "eprint_id": 84870, "eprint_status": "archive", "datestamp": "2023-08-19 05:01:58", "lastmod": "2024-01-14 19:31:15", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Klimovich-N-S", "name": { "family": "Klimovich", "given": "Nikita S." } }, { "id": "Hu-Renyu", "name": { "family": "Hu", "given": "Renyu" }, "orcid": "0000-0003-2215-8485" } ] }, "title": "Baseline requirements for detecting biosignatures with the HabEx and LUVOIR mission concepts", "ispublished": "unpub", "full_text_status": "public", "keywords": "HabEx, LUVOIR, Biosignature, Life, High Dispersion Coronagraphy", "note": "\u00a9 2017 SPIE. \n\nWe would like to thank Rowan Swain for proofreading the manuscript.\n\nPublished - 104000Z.pdf
Submitted - 1806.04324.pdf
", "abstract": "A milestone in understanding life in the universe is the detection of biosignature gases in the atmospheres of habitable exoplanets. Future mission concepts under study by the 2020 decadal survey, e.g., HabEx and LUVOIR, have the potential of achieving this goal. We investigate the baseline requirements for detecting four molecular species, H_2O, O_2, CH_4, and CO_2. These molecules are highly relevant to habitability and life activity on Earth and other planets. Through numerical simulations, we find the minimum requirement for spectral resolution (R) and starlight suppression level (C) for a given exposure time. We consider scenarios in which different molecules are detected. For example, R = 6400 (400) and C = 5 \u00d7 10^(\u221210) (2 \u00d7 10^(\u22129)) are required for HabEx (LUVOIR) to detect O_2 and H_2O for an exposure time of 400 hours for an Earth analog around a solar-type star at a distance of 5 pc. The full results are given in Table 2. The impact of exo-zodiacal contamination and thermal background is also discussed.", "date": "2017-09-01", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 104000Z", "id_number": "CaltechAUTHORS:20180216-134344780", "isbn": "9781510612570", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VIII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180216-134344780", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2275222", "primary_object": { "basename": "104000Z.pdf", "url": "https://authors.library.caltech.edu/records/51ncn-fmp90/files/104000Z.pdf" }, "related_objects": [ { "basename": "1806.04324.pdf", "url": "https://authors.library.caltech.edu/records/51ncn-fmp90/files/1806.04324.pdf" } ], "resource_type": "book_section", "pub_year": "2017", "author_list": "Wang, Ji; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.edu/records/yffrx-dxb75", "eprint_id": 82070, "eprint_status": "archive", "datestamp": "2023-08-19 05:01:16", "lastmod": "2024-01-14 05:39:38", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Jewell-Jeffrey-B", "name": { "family": "Jewell", "given": "Jeffrey" } }, { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "title": "Performance and sensitivity of vortex coronagraphs on segmented space telescopes", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, instrumentation, exoplanets, direct detection, coronagraphs", "note": "\u00a9 2017 SPIE. \n\nWe thank Matthew Bolcar (NASA GSFC) for providing information regarding the LUVOIR telescope concept as well as Laurent Pueyo (STScI) and Kevin Fogarty (JHU) for fruitful discussion regarding optimal vortex coronagraph designs. G. Ruane is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444. This work was supported by the Exoplanet Exploration Program (ExEP), Jet Propulsion Laboratory, California Institute of Technology, under contract to NASA.\n\nPublished - 104000J.pdf
Submitted - 1708.05787.pdf
", "abstract": "The detection of molecular species in the atmospheres of earth-like exoplanets orbiting nearby stars requires an optical system that suppresses starlight and maximizes the sensitivity to the weak planet signals at small angular separations. Achieving sufficient contrast performance on a segmented aperture space telescope is particularly challenging due to unwanted diffraction within the telescope from amplitude and phase discontinuities in the pupil. Apodized vortex coronagraphs are a promising solution that theoretically meet the performance needs for high contrast imaging with future segmented space telescopes. We investigate the sensitivity of apodized vortex coronagraphs to the expected aberrations, including segment co-phasing errors in piston and tip/tilt as well as other low-order and mid-spatial frequency aberrations. Coronagraph designs and their associated telescope requirements are identified for conceptual HabEx and LUVOIR telescope designs.", "date": "2017-09-01", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 104000J", "id_number": "CaltechAUTHORS:20171004-141719560", "isbn": "9781510612570", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VIII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20171004-141719560", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2274508", "primary_object": { "basename": "104000J.pdf", "url": "https://authors.library.caltech.edu/records/yffrx-dxb75/files/104000J.pdf" }, "related_objects": [ { "basename": "1708.05787.pdf", "url": "https://authors.library.caltech.edu/records/yffrx-dxb75/files/1708.05787.pdf" } ], "resource_type": "book_section", "pub_year": "2017", "author_list": "Ruane, Garreth; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.edu/records/atsgj-5cv40", "eprint_id": 84869, "eprint_status": "archive", "datestamp": "2023-08-19 05:01:52", "lastmod": "2024-01-14 19:31:13", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Klimovich-N-S", "name": { "family": "Klimovich", "given": "N." } }, { "id": "Xin-Yinzi", "name": { "family": "Xin", "given": "Y." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "J.-R." } }, { "id": "Xuan-Wenhao-Jerry", "name": { "family": "Xuan", "given": "W." }, "orcid": "0000-0002-6618-1137" }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "D." }, "orcid": "0000-0002-1583-2040" }, { "id": "Randolph-M", "name": { "family": "Randolph", "given": "M." } }, { "id": "Fucik-J-R", "name": { "family": "Fucik", "given": "J." } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. K." } }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "J." }, "orcid": "0000-0002-4361-8885" }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "G." }, "orcid": "0000-0002-1871-6264" }, { "id": "Dekany-R-G", "name": { "family": "Dekany", "given": "R." } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "B." }, "orcid": "0000-0003-4205-4800" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9." }, "orcid": "0000-0002-9173-0740" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } } ] }, "title": "Utilizing active single-mode fiber injection for speckle nulling in exoplanet characterization", "ispublished": "unpub", "full_text_status": "public", "keywords": "vortex coronagraph, fiber injection unit, speckle nulling, broadband, spectrograph, exoplanet characterization, instrumentation", "note": "\u00a9 2017 SPIE. \n\nThe authors would like to acknowledge the financial support of the Heising-Simons foundation.\n\nPublished - 104000Y.pdf
", "abstract": "Despite recent advances in high-contrast imaging techniques, high resolution spectroscopy for characterization of exoplanet atmospheres is still limited by our ability to suppress residual starlight speckles at the planet's location. We have demonstrated a new concept for speckle nulling by injecting directly imaged planet light into a single-mode fiber, linking a high-contrast adaptively-corrected coronagraph to a high-resolution spectrograph (diffraction-limited or not). The restrictions on the incident electric field that will couple into the single-mode fiber give the adaptive optics system additional degrees of freedom to suppress the speckle noise on top of destructive interference. We are able to achieve a starlight suppression gains that are an order of magnitude better than conventional techniques in broadband light with minimal planet throughput losses.", "date": "2017-09-01", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "id_number": "CaltechAUTHORS:20180216-132039857", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180216-132039857", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2275173", "primary_object": { "basename": "104000Y.pdf", "url": "https://authors.library.caltech.edu/records/atsgj-5cv40/files/104000Y.pdf" }, "resource_type": "book_section", "pub_year": "2017", "author_list": "Klimovich, N.; Xin, Y.; et el." }, { "id": "https://authors.library.caltech.edu/records/h499r-32a64", "eprint_id": 79155, "eprint_status": "archive", "datestamp": "2023-08-20 13:30:05", "lastmod": "2024-01-13 20:35:48", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Milli-J", "name": { "family": "Milli", "given": "Julien" }, "orcid": "0000-0001-9325-2511" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Mouillet-D", "name": { "family": "Mouillet", "given": "David" } }, { "id": "Kasper-M", "name": { "family": "Kasper", "given": "Markus" } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien H." }, "orcid": "0000-0001-8627-0404" } ] }, "title": "Adaptive Optics in High-Contrast Imaging", "ispublished": "unpub", "full_text_status": "restricted", "note": "\u00a9 2016 Springer International Publishing Switzerland. \n\nFirst Online: 25 August 2016.", "abstract": "While most confirmed exoplanets were discovered by indirect techniques such as radial velocities or transits, adaptive optics (AO) assisted direct imaging is a very rich and complementary method that can reveal the orbital motion of the planet, the spectrophotometry of its atmosphere but also the architecture and properties of its circumstellar environment. It can unveil possible interactions with a disc, whether a proto-planetary disc in case of on-going planetary accretion, or a debris disc for more evolved, gas-poor systems. From a statistical point of view, it probes a region, in the mass versus semi-major axis discovery space, different from other techniques, as illustrated in Fig.\u20092.1. Reaching a uniform sampling of such a parameter space is essential to derive the frequency of planets as a function of mass and semi-major axis, and therefore constrain the planet formation mechanisms. For instance, theories of planet formation predict a higher efficiency of giant planet formation close to the snow line, where radial velocity and transit techniques are poorly sensitive. They require additional ingredients such as migrations and orbital instabilities to explain the current view depicted in Fig.\u20092.1.", "date": "2016-08-25", "date_type": "published", "publisher": "Springer", "place_of_pub": "Cham, Switzerland", "pagerange": "17-41", "id_number": "CaltechAUTHORS:20170718-110428004", "isbn": "978-3-319-39737-5", "book_title": "Astronomy at High Angular Resolution: A Compendium of Techniques in the Visible and Near-Infrared", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170718-110428004", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Boffin-H-M-J", "name": { "family": "Boffin", "given": "Henri M. J." } }, { "id": "Hussain-G", "name": { "family": "Hussain", "given": "Gaitee" } }, { "id": "Berger-J-P", "name": { "family": "Berger", "given": "Jean-Philippe" } }, { "id": "Schmidtobreick-L", "name": { "family": "Schmidtobreick", "given": "Linda" } } ] }, "doi": "10.1007/978-3-319-39739-9_2", "resource_type": "book_section", "pub_year": "2016", "author_list": "Milli, Julien; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.edu/records/zzsab-9ra62", "eprint_id": 71991, "eprint_status": "archive", "datestamp": "2023-08-20 13:29:39", "lastmod": "2024-01-13 20:19:42", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "The Habitable Exoplanet (HabEx) Imaging Mission: preliminary science drivers and technical requirements", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanets, biosignatures, high contrast imaging, galaxy formation and evolution, coronagraph, starshade", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nPart of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.\n\nPublished - 99040L.pdf
", "abstract": "HabEx is one of four candidate flagship missions being studied in detail by NASA, to be submitted for consideration to the 2020 Decadal Survey in Astronomy and Astrophysics for possible launch in the 2030s. It will be optimized for direct imaging and spectroscopy of potentially habitable exoplanets, and will also enable a wide range of general astrophysics science. HabEx aims to fully characterize planetary systems around nearby solar-type stars for the first time, including rocky planets, possible water worlds, gas giants, ice giants, and faint circumstellar debris disks. In particular, it will explore our nearest neighbors and search for signs of habitability and biosignatures in the atmospheres of rocky planets in the habitable zones of their parent stars. Such high spatial resolution, high contrast observations require a large (roughly greater than 3.5m), stable, and diffraction-limited optical space telescope. Such a telescope also opens up unique capabilities for studying the formation and evolution of stars and galaxies. We present some preliminary science objectives identified for HabEx by our Science and Technology Definition Team (STDT), together with a first look at the key challenges and design trades ahead.", "date": "2016-08-24", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 99040L", "id_number": "CaltechAUTHORS:20161114-114454825", "isbn": "978-1-5106-0187-1", "book_title": "Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161114-114454825", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Fazio-G-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "Lystrup-M", "name": { "family": "Lystrup", "given": "Makenzie" } } ] }, "doi": "10.1117/12.2240457", "primary_object": { "basename": "99040L.pdf", "url": "https://authors.library.caltech.edu/records/zzsab-9ra62/files/99040L.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Mennesson, Bertrand and Mawet, Dimitri" }, { "id": "https://authors.library.caltech.edu/records/h3bw2-7ah21", "eprint_id": 72031, "eprint_status": "archive", "datestamp": "2023-08-20 13:26:43", "lastmod": "2024-01-13 20:20:06", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Hu-Renyu", "name": { "family": "Hu", "given": "Renyu" }, "orcid": "0000-0003-2215-8485" }, { "id": "Benneke-B", "name": { "family": "Benneke", "given": "Bj\u00f6rn" }, "orcid": "0000-0001-5578-1498" } ] }, "title": "High-contrast imaging and high-resolution spectroscopy observation of exoplanets", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanet, coronagraph, high-contrast imaging, high-resolution spectrograph, atmospheric modeling", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nPublished - 99112T.pdf
", "abstract": "Detection and characterization of exoplanets faces challenges of smaller angular separation and high contrast between exoplanets and their host stars. High contrast imaging (HCI) instruments equipped with coronagraphs are built to meet these challenges, providing a way of spatially suppressing and separating stellar flux from that of a planet. Another way of separating stellar flux can be achieved by high-resolution spectroscopy (HRS), exploiting the fact that spectral features are different between a star and a planet. Observing exoplanets with HCI+HRS will achieve a higher contrast than the spatial or the spectroscopic method alone, improving the sensitivity to planet detection and enabling the study of the physical and chemical processes. Here, we simulate the performance of a HCI+HRS instrument (i.e., the upgrade Keck NIRSPEC and the fiber injection unit) to study its potential in detecting and characterizing currently known directly imaged planets. The simulation considers the spectral information content of an exoplanet, telescope and instrument specifications and realistic noise sources. The result of the simulation helps to set system requirement and informs designs at system-level. We also perform a trade study for a HCI+HRS instrument for a space mission to study an Earth-like planet orbiting a Sun-like star at 10 pc.", "date": "2016-08-18", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 99112T", "id_number": "CaltechAUTHORS:20161115-110140716", "isbn": "978-1-5106-0201-4", "book_title": "Modeling, Systems Engineering, and Project Management for Astronomy VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161115-110140716", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Angeli-G-Z", "name": { "family": "Angeli", "given": "George Z." } }, { "id": "Dierickx-P", "name": { "family": "Dierickx", "given": "Philippe" } } ] }, "doi": "10.1117/12.2235216", "primary_object": { "basename": "99112T.pdf", "url": "https://authors.library.caltech.edu/records/h3bw2-7ah21/files/99112T.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Wang, Ji; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.edu/records/8rkbz-w4t10", "eprint_id": 74399, "eprint_status": "archive", "datestamp": "2023-08-20 13:21:06", "lastmod": "2024-01-13 20:25:04", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Dohlen-K", "name": { "family": "Dohlen", "given": "Kjetil" } }, { "id": "Vigan-A", "name": { "family": "Vigan", "given": "Arthur" }, "orcid": "0000-0002-5902-7828" }, { "id": "Mouillet-D", "name": { "family": "Mouillet", "given": "David" } }, { "id": "Wildi-F", "name": { "family": "Wildi", "given": "Francois" } }, { "id": "Sauvage-J-F", "name": { "family": "Sauvage", "given": "Jean Francois" } }, { "id": "Fusco-T", "name": { "family": "Fusco", "given": "Thierry" } }, { "id": "Beuzit-J-L", "name": { "family": "Beuzit", "given": "Jean-Luc" } }, { "id": "Puget-P", "name": { "family": "Puget", "given": "Pascal" } }, { "id": "Le-Mignant-D", "name": { "family": "Le Mignant", "given": "David" } }, { "id": "Roelfsema-R", "name": { "family": "Roelfsema", "given": "Ronald" } }, { "id": "Pragt-J", "name": { "family": "Pragt", "given": "Johan" } }, { "id": "Schmid-H-M", "name": { "family": "Schmid", "given": "Hands Martin" } }, { "id": "Gratton-R-G", "name": { "family": "Gratton", "given": "Raffaele" } }, { "id": "Mesa-D", "name": { "family": "Mesa", "given": "Dino" } }, { "id": "Claudi-R", "name": { "family": "Claudi", "given": "Ricardo" } }, { "id": "Langlois-M", "name": { "family": "Langlois", "given": "Maud" } }, { "id": "Costille-A", "name": { "family": "Costille", "given": "Anne" } }, { "id": "Hugot-E", "name": { "family": "Hugot", "given": "Emmanuel" }, "orcid": "0000-0002-5879-6318" }, { "id": "O'Neil-J", "name": { "family": "O'Neil", "given": "Jared" } }, { "id": "Guerra-J-C", "name": { "family": "Guerra", "given": "Juan Carlos" } }, { "id": "N'Diaye-M", "name": { "family": "N'Diaye", "given": "Mamadou" }, "orcid": "0000-0002-1721-3294" }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien" }, "orcid": "0000-0001-8627-0404" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Zins-G", "name": { "family": "Zins", "given": "Gerard" } } ] }, "title": "SPHERE on-sky performance compared with budget predictions", "ispublished": "unpub", "full_text_status": "public", "keywords": "Extreme adaptive optics, High contrast imaging, System analysis, Wave front PSD budgeting", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nSPHERE is an instrument designed and built by a consortium consisting of IPAG, MPIA, LAM, LESIA, Laboratoire Fizeau, INAF, Observatoire de Gen\u00e8ve, ETH, NOVA, ONERA and ASTRON in collaboration with ESO. We are grateful to all the consortium members who contributed to build, test, and validate the instrument in Europe and in Chile. We also thank the ESO staff involved with the installation and operation of SPHERE on the VLT-UT3.\n\nPublished - 99083D.pdf
", "abstract": "The SPHERE (spectro-photometric exoplanet research) extreme-AO planet hunter saw first light at the VLT observatory on Mount Paranal in May 2014 after ten years of development. Great efforts were put into modelling its performance, particularly in terms of achievable contrast, and to budgeting instrumental features such as wave front errors and optical transmission to each of the instrument's three focal planes, the near infrared dual imaging camera IRDIS, the near infrared integral field spectrograph IFS and the visible polarimetric camera ZIMPOL. In this paper we aim at comparing predicted performance with measured performance. In addition to comparing on-sky contrast curves and calibrated transmission measurements, we also compare the PSD-based wave front error budget with in-situ wave front maps obtained thanks to a Zernike phase mask, ZELDA, implemented in the infrared coronagraph wheel. One of the most critical elements of the SPHERE system is its high-order deformable mirror, a prototype 40x40 actuator piezo stack design developed in parallel with the instrument itself. The development was a success, as witnessed by the instrument performance, in spite of some bad surprises discovered on the way. The devastating effects of operating without taking properly into account the loss of several actuators and the thermally and temporally induced variations in the DM shape will be analysed, and the actions taken to mitigate these defects through the introduction of specially designed Lyot stops and activation of one of the mirrors in the optical train will be described.", "date": "2016-08-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 99083D", "id_number": "CaltechAUTHORS:20170217-082008486", "isbn": "978-1-5106-0196-3", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170217-082008486", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Simard-L", "name": { "family": "Simard", "given": "Luc" } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2233953", "primary_object": { "basename": "99083D.pdf", "url": "https://authors.library.caltech.edu/records/8rkbz-w4t10/files/99083D.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Dohlen, Kjetil; Vigan, Arthur; et el." }, { "id": "https://authors.library.caltech.edu/records/se4pf-12t28", "eprint_id": 74403, "eprint_status": "archive", "datestamp": "2023-08-20 13:17:17", "lastmod": "2024-01-13 20:25:08", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Adkins-S-M", "name": { "family": "Adkins", "given": "Sean M." } }, { "id": "McLean-I-S", "name": { "family": "McLean", "given": "Ian S." } }, { "id": "Fitzgerald-M-P", "name": { "family": "Fitzgerald", "given": "Michael P." }, "orcid": "0000-0002-0176-8973" }, { "id": "Larkin-J-E", "name": { "family": "Larkin", "given": "James E." }, "orcid": "0000-0001-7687-3965" }, { "id": "Lewis-H-A", "name": { "family": "Lewis", "given": "Hilton A." } }, { "id": "Martin-D-Christopher", "name": { "family": "Martin", "given": "Christopher" }, "orcid": "0000-0002-8650-1644" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Prochaska-J-X", "name": { "family": "Prochaska", "given": "J. X." }, "orcid": "0000-0002-7738-6875" }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" } ] }, "title": "New developments in instrumentation at the W. M. Keck Observatory", "ispublished": "unpub", "full_text_status": "public", "keywords": "Adaptive Optics, Infrared, Instrumentation, Integral Field, Laser Guide Star, Spectrograph, Targets of Opportunity, Telescope Control", "note": "\u00a9 2016 SPIE. \n\nThe W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. \n\nThe development of the Keck II next generation laser is made possible through the support of the Gordon and Betty Moore Foundation, the W. M. Keck Foundation, the Bob & Renee Parsons Foundation, Friends of Keck Observatory, and the Thirty Meter Telescope Project. \n\nThe development of the blue channel of KCWI is supported in part by a grant from National Science Foundation under Scientific Program Order No. 5 as issued for support of the Telescope Systems Instrumentation Program (TSIP), in accordance with Proposal No. AST-0335461 submitted by AURA. Support for KCWI has also come from the Heising-Simons Foundation and the Mount Cuba Foundation. \n\nObservatory operations are supported in part by the National Aeronautics and Space Administration under Grant and Cooperative Agreement No. NNX13AH26A. The OSIRIS spectrograph upgrade is supported by the National Science Foundation under Grant No. AST-1311102, K1DM3 is supported in part by the National Science Foundation under Grant No. AST-1337609, the red channel of KCWI is supported in part by the National Science Foundation under Grant No. AST-1429890. The NIRSPEC upgrade is supported in part by the National Science Foundation under Grant No. AST-1532315, and by the Heising-Simons Foundation. The OSIRIS grating upgrade project was funded in part by the Dunlap Institute, University of Toronto. The OSIRIS imager upgrade project is supported by funding from the Gordon and Betty Moore Foundation. Development of KPF is supported by the Heising-Simons Foundation.\n\nPublished - 990805.pdf
", "abstract": "The W. M. Keck Observatory is committed to maintaining the scientific leadership of our observing community by matching our observers' skills and passions in their fields of astronomical science with a continuing dedication by the Observatory and its collaborators to the development of state of the art instrumentation and systems. Our science driven strategic plan guides these developments and informs our plans for the future. In this paper we describe the performance of recently completed new instruments, instrument upgrades, and infrastructure upgrade projects. We also describe the expected performance of projects currently in the development or construction phases. Projects recently completed include a new laser for the Keck II AO system, the upgrade of the spectrograph detector in the OSIRIS instrument, and the upgrade to the telescope control system on the Keck II telescope. Projects in development include an upgrade to the telescope control system on the Keck I telescope, the blue channel of the Keck Cosmic Web Imager, the red channel of the Keck Cosmic Web Imager, the Keck Planet Finder, a deployable tertiary mirror for the Keck I telescope, an upgrade to the imager of OSIRIS, a major upgrade to the NIRSPEC instrument, and a fiber feed from the Keck II AO system to NIRSPEC.", "date": "2016-08-03", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 990805", "id_number": "CaltechAUTHORS:20170217-125257372", "isbn": "978-1-5106-0196-3", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170217-125257372", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" }, { "agency": "Gordon and Betty Moore Foundation" }, { "agency": "Bob and Renee Parsons Foundation" }, { "agency": "Friends of Keck Observatory" }, { "agency": "Thirty Meter Telescope Project" }, { "agency": "NSF", "grant_number": "AST-0335461" }, { "agency": "Heising-Simons Foundation" }, { "agency": "Mt. Cuba Foundation" }, { "agency": "NASA", "grant_number": "NNX13AH26A" }, { "agency": "NSF", "grant_number": "AST-1311102" }, { "agency": "NSF", "grant_number": "AST-1337609" }, { "agency": "NSF", "grant_number": "AST-1429890" }, { "agency": "NSF", "grant_number": "AST-1532315" }, { "agency": "University of Toronto" } ] }, "local_group": { "items": [ { "id": "Thirty-Meter-Telescope" } ] }, "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Simard-L", "name": { "family": "Simard", "given": "Luc" } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2233759", "primary_object": { "basename": "990805.pdf", "url": "https://authors.library.caltech.edu/records/se4pf-12t28/files/990805.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Adkins, Sean M.; McLean, Ian S.; et el." }, { "id": "https://authors.library.caltech.edu/records/shc1h-8jb65", "eprint_id": 87167, "eprint_status": "archive", "datestamp": "2023-08-20 13:17:26", "lastmod": "2024-01-14 20:15:12", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Kerber-F", "name": { "family": "Kerber", "given": "Florian" } }, { "id": "K\u00e4ufl-H-U", "name": { "family": "K\u00e4ufl", "given": "Hans Ulrich" } }, { "id": "Tristram-K-R-W", "name": { "family": "Tristram", "given": "Konrad" } }, { "id": "Asmus-D", "name": { "family": "Asmus", "given": "Daniel" }, "orcid": "0000-0003-0220-2063" }, { "id": "Baksai-P", "name": { "family": "Baksai", "given": "Pedro" } }, { "id": "Di-Lieto-N", "name": { "family": "Di Lieto", "given": "Nicola" } }, { "id": "Dobrzycka-D", "name": { "family": "Dobrzycka", "given": "Danuta" } }, { "id": "Duhoux-P", "name": { "family": "Duhoux", "given": "Philippe" } }, { "id": "Finger-G", "name": { "family": "Finger", "given": "Gert" } }, { "id": "Hummel-Christian", "name": { "family": "Hummel", "given": "Christian" } }, { "id": "Ives-D", "name": { "family": "Ives", "given": "Derek" } }, { "id": "Jakob-G", "name": { "family": "Jakob", "given": "Gerd" } }, { "id": "Lundin-L", "name": { "family": "Lundin", "given": "Lars" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Mehrgan-L", "name": { "family": "Mehrgan", "given": "Leander" } }, { "id": "Moraeu-V", "name": { "family": "Moreau", "given": "Vincent" } }, { "id": "Pantin-E", "name": { "family": "Pantin", "given": "Eric" } }, { "id": "Riquelme-M", "name": { "family": "Riquelme", "given": "Miguel" } }, { "id": "Sanchez-Joel", "name": { "family": "Sanchez", "given": "Joel" } }, { "id": "Sandrock-S", "name": { "family": "Sandrock", "given": "Stefan" } }, { "id": "Siebenmorgen-R", "name": { "family": "Siebenmorgen", "given": "Ralf" } }, { "id": "Stegmaier-J\u00f6rg", "name": { "family": "Stegmaier", "given": "J\u00f6rg" } }, { "id": "Smette-A", "name": { "family": "Smette", "given": "Alain" } }, { "id": "Taylor-J", "name": { "family": "Taylor", "given": "Julian" } }, { "id": "van-den-Acker-M", "name": { "family": "van den Acker", "given": "Mario" } }, { "id": "Valdes-G", "name": { "family": "Valdes", "given": "Guillermo" } }, { "id": "Venema-L", "name": { "family": "Venema", "given": "Lars" } } ] }, "title": "VISIR Upgrade: all's well that ends well", "ispublished": "unpub", "full_text_status": "public", "keywords": "VISIR, upgrade, ESO VLT, mid-IR, AQUARIUS, excess low frequency noise, chopping, water vapour, lessons learned", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nWe gratefully acknowledge the support by Paranal staff and the good collaboration. In particular we thank M. Tapia and the staff of the machine shop for their quick and effective support. Great support was already provided by system engineering and science operations. Special thanks go to Prof. Peter Tuthill (The University of Sydney, Australia) for designing the sparse aperture mask.\n\nPublished - 99080D.pdf
", "abstract": "We present an overview of the VISIR instrument after its upgrade and return to science operations. VISIR is the midinfrared imager and spectrograph at ESO's VLT. The project team is comprised of ESO staff and members of the original VISIR consortium: CEA Saclay and ASTRON. The project plan was based on input from the ESO user community with the goal of enhancing the scientific performance and efficiency of VISIR by a combination of measures: installation of improved hardware, optimization of instrument operations and software support. The cornerstone of the upgrade is the 1k by 1k Si:As AQUARIUS detector array manufactured by Raytheon. In addition, a new prism spectroscopic mode covers the whole N-band in a single observation. Finally, new scientific capabilities for high resolution and high-contrast imaging are offered by sub-aperture mask and coronagraphic modes. In order to make optimal use of favourable atmospheric conditions, a water vapour monitor has been deployed on Paranal, allowing for real-time decisions and the introduction of a user-defined constraint on water vapour. During the commissioning in 2012, it was found that the on-sky sensitivity of the AQUARIUS detector was significantly below expectations. Extensive testing of the detector arrays in the laboratory and on-sky enabled us to diagnose the cause for the shortcoming of the detector as excess low frequency noise. It is inherent to the design chosen for this detector and cannot be remedied by changing the detector set-up. Since this is a form of correlated noise, its impact can be limited by modulating the scene recorded by the detector. After careful analysis, we have implemented fast (up to 4 Hz) chopping with field stabilization using the secondary mirror of the VLT. During commissioning, the upgraded VISIR has been confirmed to be more sensitive than the old instrument, and in particular for low-resolution spectroscopy in the N-band, a gain of a factor 6 is realized in observing efficiency. After overcoming several additional technical problems, VISIR is back in Science Operations since April 2015. In addition an upgrade of the IT infrastructure related to VISIR has been conducted in order to support burst-mode operations. Science Verification of the new modes was performed in Feb 2016. The upgraded VISIR is a powerful instrument providing close to background limited performance for diffraction-limited observations at an 8-m telescope. It offers synergies with facilities such as ALMA, JWST, VLTI and SOFIA, while a wealth of targets is available from survey works like WISE. In addition, it will bring confirmation of the technical readiness and scientific value of several aspects for future mid-IR instrumentation at Extremely Large Telescopes. We also present several lessons learned during the project.", "date": "2016-08-03", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 99080D", "id_number": "CaltechAUTHORS:20180615-153348012", "isbn": "9781510601956", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180615-153348012", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Simard-L", "name": { "family": "Simard", "given": "Luc" } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2232441", "primary_object": { "basename": "99080D.pdf", "url": "https://authors.library.caltech.edu/records/shc1h-8jb65/files/99080D.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Kerber, Florian; K\u00e4ufl, Hans Ulrich; et el." }, { "id": "https://authors.library.caltech.edu/records/gw9vy-7pa34", "eprint_id": 72034, "eprint_status": "archive", "datestamp": "2023-08-20 13:01:58", "lastmod": "2024-01-13 20:20:08", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mazoyer-J", "name": { "family": "Mazoyer", "given": "Johan" }, "orcid": "0000-0002-9133-3091" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "N'Diaye-M", "name": { "family": "N'Diaye", "given": "Mamadou" }, "orcid": "0000-0002-1721-3294" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Soummer-R", "name": { "family": "Soummer", "given": "R\u00e9mi" }, "orcid": "0000-0003-2753-2819" }, { "id": "Norman-C", "name": { "family": "Norman", "given": "Colin" } } ] }, "title": "Correcting for the effects of pupil discontinuities with the ACAD method", "ispublished": "unpub", "full_text_status": "public", "keywords": "Instrumentation, WFIRST-AFTA, High-contrast imaging, adaptive optics, wave-front error correction, segmentation, aperture discontinuities, deformable mirror", "note": "\u00a9 2016 SPIE. \n\nThis material is based upon work carried out under subcontract #1496556 with the Jet Propulsion Laboratory funded by NASA and administered by the California Institute of Technology. We would like to thanks J. Krist (JPL) for his helpful comments on the throughput and contrast definition.\n\nPublished - 99044T.pdf
", "abstract": "The current generation of ground-based coronagraphic instruments uses deformable mirrors to correct for phase errors and to improve contrast levels at small angular separations. Improving these techniques, several space and ground based instruments are currently developed using two deformable mirrors to correct for both phase and amplitude errors. However, as wavefront control techniques improve, more complex telescope pupil geometries (support structures, segmentation) will soon be a limiting factor for these next generation coronagraphic instruments. The technique presented in this proceeding, the Active Correction of Aperture Discontinuities method, is taking advantage of the fact that most future coronagraphic instruments will include two deformable mirrors, and is proposing to find the shapes and actuator movements to correct for the effect introduced by these complex pupil geometries. For any coronagraph previously designed for continuous apertures, this technique allow to obtain similar performance in contrast with a complex aperture (with segmented and secondary mirror support structures), with high throughput and flexibility to adapt to changing pupil geometry (e.g. in case of segment failure or maintenance of the segments). We here present the results of the parametric analysis realized on the WFIRST pupil for which we obtained high contrast levels with several deformable mirror setups (size, separation between them), coronagraphs (Vortex charge 2, vortex charge 4, APLC) and spectral bandwidths. However, because contrast levels and separation are not the only metrics to maximize the scientific return of an instrument, we also included in this study the influence of these deformable mirror shapes on the throughput of the instrument and sensitivity to pointing jitters. Finally, we present results obtained on another potential space based telescope segmented aperture. The main result of this proceeding is that we now obtain comparable performance than the coronagraphs previously designed for WFIRST. First result from the parametric analysis strongly suggest that the 2 deformable mirror set up (size and distance between them) have a important impact on the performance in contrast and throughput of the final instrument.", "date": "2016-07-29", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 99044T", "id_number": "CaltechAUTHORS:20161115-122345576", "isbn": "978-1-5106-0187-1", "book_title": "Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161115-122345576", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech", "grant_number": "1496556" } ] }, "contributors": { "items": [ { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Fazio-G-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "Lystrup-M", "name": { "family": "Lystrup", "given": "Makenzie" } } ] }, "doi": "10.1117/12.2232907", "primary_object": { "basename": "99044T.pdf", "url": "https://authors.library.caltech.edu/records/gw9vy-7pa34/files/99044T.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Mazoyer, Johan; Pueyo, Laurent; et el." }, { "id": "https://authors.library.caltech.edu/records/1ade7-pqs94", "eprint_id": 72546, "eprint_status": "archive", "datestamp": "2023-08-20 13:00:19", "lastmod": "2024-01-13 20:21:38", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Carlomagno-B", "name": { "family": "Carlomagno", "given": "Brunella" } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Kenworthy-M-A", "name": { "family": "Kenworthy", "given": "Matthew" }, "orcid": "0000-0002-7064-8270" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Keller-C-U", "name": { "family": "Keller", "given": "Christoph U." } }, { "id": "Otten-G", "name": { "family": "Otten", "given": "Gilles" } }, { "id": "Feldt-M", "name": { "family": "Feldt", "given": "Markus" } }, { "id": "Hippler-S", "name": { "family": "Hippler", "given": "Stefan" } }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "Elsa" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "Christian" } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "Serge" } }, { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "Pontus" } }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "Mikael" }, "orcid": "0000-0002-2011-0851" }, { "id": "Vargas-Catalan-E", "name": { "family": "Vargas Catalan", "given": "Ernesto" } }, { "id": "Brandl-B-R", "name": { "family": "Brandl", "given": "Bernhard R." } } ] }, "title": "End-to-end simulations of the E-ELT/METIS coronagraphs", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanets detection, Mid-IR, Vector Vortex Coronagraphs, Apodizing Phase Plate coronagraphs, E-ELT/METIS instrument, end-to-end simulations", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement n.337569) and from the French Community of Belgium through an ARC grant for Concerted Research Actions.\n\nPublished - 990973.pdf
", "abstract": "The direct detection of low-mass planets in the habitable zone of nearby stars is an important science case for future E-ELT instruments such as the mid-infrared imager and spectrograph METIS, which features vortex phase masks and apodizing phase plates (APP) in its baseline design. In this work, we present end-to-end performance simulations, using Fourier propagation, of several METIS coronagraphic modes, including focal-plane vortex phase masks and pupil-plane apodizing phase plates, for the centrally obscured, segmented E-ELT pupil. The atmosphere and the AO contributions are taken into account. Hybrid coronagraphs combining the advantages of vortex phase masks and APPs are considered to improve the METIS coronagraphic performance.", "date": "2016-07-27", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 990973", "id_number": "CaltechAUTHORS:20161205-092810966", "isbn": "978-1-5106-0198-7", "book_title": "Adaptive Optics Systems V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161205-092810966", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" } ] }, "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2233444", "primary_object": { "basename": "990973.pdf", "url": "https://authors.library.caltech.edu/records/1ade7-pqs94/files/990973.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Carlomagno, Brunella; Absil, Olivier; et el." }, { "id": "https://authors.library.caltech.edu/records/yta9h-qj084", "eprint_id": 72537, "eprint_status": "archive", "datestamp": "2023-08-20 13:00:04", "lastmod": "2024-01-13 20:21:22", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Milli-J", "name": { "family": "Milli", "given": "J." }, "orcid": "0000-0001-9325-2511" }, { "id": "Banas-T", "name": { "family": "Banas", "given": "T." } }, { "id": "Mouillet-D", "name": { "family": "Mouillet", "given": "D." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "J. H." }, "orcid": "0000-0001-8627-0404" }, { "id": "Vigan-A", "name": { "family": "Vigan", "given": "A." }, "orcid": "0000-0002-5902-7828" }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "A." }, "orcid": "0000-0001-9353-2724" }, { "id": "Kasper-M", "name": { "family": "Kasper", "given": "M." } }, { "id": "Wahhaj-Z", "name": { "family": "Wahhaj", "given": "Zahed" }, "orcid": "0000-0001-8269-324X" }, { "id": "Lagrange-A-M", "name": { "family": "Lagrange", "given": "A. M." } }, { "id": "Beuzit-J-L", "name": { "family": "Beuzit", "given": "J.-L." } }, { "id": "Fusco-T", "name": { "family": "Fusco", "given": "T." } }, { "id": "Sauvage-J-F", "name": { "family": "Sauvage", "given": "J.-F." } }, { "id": "Galicher-R", "name": { "family": "Galicher", "given": "R." } } ] }, "title": "Speckle lifetime in XAO coronagraphic images: temporal evolution of SPHERE coronagraphic images", "ispublished": "unpub", "full_text_status": "public", "keywords": "Extreme Adaptive Optics, Speckles, High Contrast", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nJ.M. acknowledges support from the ESO fellowship program and we thank ESO staff and technical operators at the Paranal Observatory. T.B. acknowledges the Adaptive Optics groups at ESO Santiago and ESO Garching for support of this research.\n\nPublished - 99094Z.pdf
Submitted - 1608.02149v2.pdf
", "abstract": "The major source of noise in high-contrast imaging is the presence of slowly evolving speckles that do not average with time. The temporal stability of the point-spread-function (PSF) is therefore critical to reach a high contrast with extreme adaptive optics (XAO) instruments. Understanding on which timescales the PSF evolves and what are the critical parameters driving the speckle variability allow to design an optimal observing strategy and data reduction technique to calibrate instrumental aberrations and reveal faint astrophysical sources. We have obtained a series of 52 min, AO-corrected, coronagraphically occulted, high-cadence (1.6Hz), H-band images of the star HR 3484 with the SPHERE (Spectro-Polarimeter High-contrast Exoplanet REsearch1) instrument on the VLT. This is a unique data set from an XAO instrument to study its stability on timescales as short as one second and as long as several tens of minutes. We find different temporal regimes of decorrelation. We show that residuals from the atmospheric turbulence induce a fast, partial decorrelation of the PSF over a few seconds, before a transition to a regime with a linear decorrelation with time, at a rate of several tens parts per million per second (ppm/s). We analyze the spatial dependence of this decorrelation within the well-corrected radius of the adaptive optics system and show that the linear decorrelation is faster at short separations. Last, we investigate the influence of the distance to the meridian on the decorrelation.", "date": "2016-07-27", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 99094Z", "id_number": "CaltechAUTHORS:20161202-145424511", "isbn": "978-1-5106-0198-7", "book_title": "Adaptive Optics Systems V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161202-145424511", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Southern Observatory (ESO)" } ] }, "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2231703", "primary_object": { "basename": "1608.02149v2.pdf", "url": "https://authors.library.caltech.edu/records/yta9h-qj084/files/1608.02149v2.pdf" }, "related_objects": [ { "basename": "99094Z.pdf", "url": "https://authors.library.caltech.edu/records/yta9h-qj084/files/99094Z.pdf" } ], "resource_type": "book_section", "pub_year": "2016", "author_list": "Milli, J.; Banas, T.; et el." }, { "id": "https://authors.library.caltech.edu/records/a9n7p-13t03", "eprint_id": 87168, "eprint_status": "archive", "datestamp": "2023-08-20 13:00:56", "lastmod": "2024-01-14 20:15:15", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Bottom-M", "name": { "family": "Bottom", "given": "Michael" }, "orcid": "0000-0003-1341-5531" }, { "id": "Femenia-B", "name": { "family": "Femenia", "given": "Bruno" } }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "Elsa" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Dekany-R-G", "name": { "family": "Dekany", "given": "Richard" } }, { "id": "Milburn-J-W", "name": { "family": "Milburn", "given": "Jennifer" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } } ] }, "title": "Speckle nulling wavefront control for Palomar and Keck", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, coronagraphy, adaptive optics, wavefront correction", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nPublished - 990955.pdf
", "abstract": "We present a speckle nulling code currently being used for high contrast imaging at the Palomar and Keck telescopes. The code can operate in open and closed loop and is self-calibrating, requiring no system model and minimal hand-coded parameters. Written in a modular fashion, it is straightforward to port to different instruments. It has been used with systems operating in the optical through thermal infrared, and can deliver nearly an order of magnitude improvement in raw contrast. We will be releasing this code to the public in the near future.", "date": "2016-07-27", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 990955", "id_number": "CaltechAUTHORS:20180615-154328287", "isbn": "9781510601970", "book_title": "Adaptive Optics Systems V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180615-154328287", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2233025", "primary_object": { "basename": "990955.pdf", "url": "https://authors.library.caltech.edu/records/a9n7p-13t03/files/990955.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Bottom, Michael; Femenia, Bruno; et el." }, { "id": "https://authors.library.caltech.edu/records/5nncp-jxs06", "eprint_id": 72545, "eprint_status": "archive", "datestamp": "2023-08-20 12:58:35", "lastmod": "2024-01-13 20:21:36", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Femen\u00eda-Castell\u00e1-B", "name": { "family": "Femen\u00eda-Castell\u00e1", "given": "Bruno" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Matthews-Keith-Astronomy", "name": { "family": "Matthews", "given": "Keith" } }, { "id": "Bottom-M", "name": { "family": "Bottom", "given": "Michael" }, "orcid": "0000-0003-1341-5531" }, { "id": "Ngo-Henry-Hoang-Khoi-Exoplanets", "name": { "family": "Ngo", "given": "H." }, "orcid": "0000-0001-5172-4859" } ] }, "title": "Commissioning and first light results of an L'-band vortex coronagraph with the Keck II adaptive optics NIRC2 science instrument", "ispublished": "unpub", "full_text_status": "public", "keywords": "W.M. Keck Observatory, NIRC2, high-contrast imaging, coronagraph, vortex phase mask", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA. The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement n. 337569), and from the French Community of Belgium through an ARC grant for Concerted Research Action. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - 990922.pdf
", "abstract": "On March 2015 an L'-band vortex coronagraph based on an Annular Groove Phase Mask made up of a diamond sub-wavelength grating was installed on NIRC2 as a demonstration project. This vortex coronagraph operates in the L' band not only in order to take advantage from the favorable star/planet contrast ratio when observing beyond the K band, but also to exploit the fact that the Keck II Adaptive Optics (AO) system delivers nearly extreme adaptive optics image quality (Strehl ratios values near 90%) at 3.7\u03bcm. We describe the hardware installation of the vortex phase mask during a routine NIRC2 service mission. The success of the project depends on extensive software development which has allowed the achievement of exquisite real-time pointing control as well as further contrast improvements by using speckle nulling to mitigate the effect of static speckles. First light of the new coronagraphic mode was on June 2015 with already very good initial results. Subsequent commissioning nights were interlaced with science nights by members of the VORTEX team with their respective scientific programs. The new capability and excellent results so far have motivated the VORTEX team and the Keck Science Steering Committee (KSSC) to offer the new mode in shared risk mode for 2016B.", "date": "2016-07-26", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 990922", "id_number": "CaltechAUTHORS:20161205-080725840", "isbn": "978-1-5106-0198-7", "book_title": "Adaptive Optics Systems V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161205-080725840", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" } ] }, "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2233228", "primary_object": { "basename": "990922.pdf", "url": "https://authors.library.caltech.edu/records/5nncp-jxs06/files/990922.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Femen\u00eda-Castell\u00e1, Bruno; Serabyn, Eugene; et el." }, { "id": "https://authors.library.caltech.edu/records/5b36g-2m517", "eprint_id": 86796, "eprint_status": "archive", "datestamp": "2023-08-20 12:59:05", "lastmod": "2024-01-14 20:14:21", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "P." }, "orcid": "0000-0002-1646-442X" }, { "id": "Dekany-R-G", "name": { "family": "Dekany", "given": "R." } }, { "id": "Chun-Miyoung", "name": { "family": "Chun", "given": "M." } }, { "id": "Hall-D-N-B", "name": { "family": "Hall", "given": "D." } }, { "id": "Cetre-S", "name": { "family": "Cetre", "given": "S." } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "O." }, "orcid": "0000-0002-1097-9908" }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. K." } }, { "id": "Bowler-B-P", "name": { "family": "Bowler", "given": "B." }, "orcid": "0000-0003-2649-2288" }, { "id": "Liu-Michael-C", "name": { "family": "Liu", "given": "M." }, "orcid": "0000-0003-2232-7664" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Bartos-R-D", "name": { "family": "Bartos", "given": "R." } }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "J." }, "orcid": "0000-0002-4361-8885" }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "G." }, "orcid": "0000-0002-1871-6264" }, { "id": "Fitzgerald-M-P", "name": { "family": "Fitzgerald", "given": "M." }, "orcid": "0000-0002-0176-8973" }, { "id": "Skemer-A-J", "name": { "family": "Skemer", "given": "A." }, "orcid": "0000-0001-6098-3924" }, { "id": "Ireland-M-J", "name": { "family": "Ireland", "given": "M." }, "orcid": "0000-0002-6194-043X" }, { "id": "Fucik-J-R", "name": { "family": "Fucik", "given": "J." } }, { "id": "Fortney-J-J", "name": { "family": "Fortney", "given": "J." }, "orcid": "0000-0002-9843-4354" }, { "id": "Crossfield-I-J-M", "name": { "family": "Crossfield", "given": "I." }, "orcid": "0000-0002-1835-1891" }, { "id": "Hu-Renyu", "name": { "family": "Hu", "given": "R." }, "orcid": "0000-0003-2215-8485" }, { "id": "Benneke-B", "name": { "family": "Benneke", "given": "B." }, "orcid": "0000-0001-5578-1498" } ] }, "title": "Keck Planet Imager and Characterizer: concept and phased implementation", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanets, high contrast imaging, high contrast high resolution spectroscopy, small inner working\nangle coronagraphy, vortex coronagraph, on-axis segmented telescopes, apodization, Extremely Large Telescopes", "note": "\u00a9 2016 SPIE. \n\nThis work was partially carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.\n\nPublished - 99090D.pdf
", "abstract": "The Keck Planet Imager and Characterizer (KPIC) is a cost-effective upgrade path to the W.M. Keck observatory (WMKO) adaptive optics (AO) system, building on the lessons learned from first and second-generation extreme AO (ExAO) coronagraphs. KPIC will explore new scientific niches in exoplanet science, while maturing critical technologies and systems for future ground-based (TMT, EELT, GMT) and space-based planet imagers (HabEx, LUVOIR). The advent of fast low-noise IR cameras (IR-APD, MKIDS, electron injectors), the rapid maturing of efficient wavefront sensing (WFS) techniques (Pyramid, Zernike), small inner working angle (IWA) coronagraphs (e.g., vortex) and associated low-order wavefront sensors (LOWFS), as well as recent breakthroughs in high contrast high resolution spectroscopy, open new direct exoplanet exploration avenues that are complementary to planet imagers such as VLT-SPHERE and the Gemini Planet Imager (GPI). For instance, the search and detailed characterization of planetary systems on solar-system scales around late-type stars, mostly beyond SPHERE and GPI's reaches, can be initiated now at WMKO.", "date": "2016-07-26", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 99090D", "id_number": "CaltechAUTHORS:20180605-131826047", "isbn": "9781510601970", "book_title": "Adaptive Optics Systems V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180605-131826047", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2233658", "primary_object": { "basename": "99090D.pdf", "url": "https://authors.library.caltech.edu/records/5b36g-2m517/files/99090D.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Mawet, D.; Wizinowich, P.; et el." }, { "id": "https://authors.library.caltech.edu/records/g44e2-ae444", "eprint_id": 72543, "eprint_status": "archive", "datestamp": "2023-08-20 12:58:26", "lastmod": "2024-01-13 20:21:32", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "id": "Chun-Mark-R", "name": { "family": "Chun", "given": "Mark" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Agapito-G", "name": { "family": "Agapito", "given": "Guido" } }, { "id": "Dekany-R-G", "name": { "family": "Dekany", "given": "Richard" } }, { "id": "Esposito-S", "name": { "family": "Esposito", "given": "Simone" } }, { "id": "Fusco-T", "name": { "family": "Fusco", "given": "Thierry" } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Hall-D-N-B", "name": { "family": "Hall", "given": "Donald" } }, { "id": "Plantet-C", "name": { "family": "Plantet", "given": "Cedric" } }, { "id": "Rigaut-F-J", "name": { "family": "Rigaut", "given": "Fran\u00e7ois" } } ] }, "title": "Near-Infrared Wavefront Sensing", "ispublished": "unpub", "full_text_status": "public", "keywords": "adaptive optics, wavefront sensing, tip-tilt sensing, near infrared, pyramid, Keck, LIFT", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The Keck I near-IR tip-tilt sensor was supported by the National Science Foundation under Grant No. AST-1007058 and by the Gordon and Betty Moore Foundation under Grant No. 4046. \n\nThe authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - 990915.pdf
", "abstract": "We discuss the advantages of wavefront sensing at near-infrared (IR) wavelengths with low-noise detector technologies that have recently become available. In this paper, we consider low order sensing with laser guide star (LGS) adaptive optics (AO) and high order sensing with natural guide star (NGS) AO. We then turn to the application of near-IR sensing with the W. M. Keck Observatory (WMKO) AO systems for science and as a demonstrator for similar systems on extremely large telescopes (ELTs). These demonstrations are based upon an LGS AO near-IR tip-tilt-focus sensor and our collaboration to implement a near-IR pyramid wavefront sensor (PWFS) for a NGS AO L-band coronagraphic imaging survey to identify exoplanet candidates.", "date": "2016-07-26", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 990915", "id_number": "CaltechAUTHORS:20161205-080523798", "isbn": "978-1-5106-0198-7", "book_title": "Adaptive Optics Systems V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161205-080523798", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" }, { "agency": "NSF", "grant_number": "AST-1007058" }, { "agency": "Gordon and Betty Moore Foundation", "grant_number": "4046" } ] }, "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2233035", "primary_object": { "basename": "990915.pdf", "url": "https://authors.library.caltech.edu/records/g44e2-ae444/files/990915.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Wizinowich, Peter; Chun, Mark; et el." }, { "id": "https://authors.library.caltech.edu/records/qjm8c-q3050", "eprint_id": 87169, "eprint_status": "archive", "datestamp": "2023-08-20 12:59:09", "lastmod": "2024-01-14 20:15:18", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Sauvage-J-F", "name": { "family": "Sauvage", "given": "Jean Fran\u00e7ois" } }, { "id": "Fusco-T", "name": { "family": "Fusco", "given": "Thierry" } }, { "id": "Lamb-Masen", "name": { "family": "Lamb", "given": "Masen" } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien" }, "orcid": "0000-0001-8627-0404" }, { "id": "Brinkmann-M", "name": { "family": "Brinkmann", "given": "Martin" } }, { "id": "Guesalaga-A", "name": { "family": "Guesalaga", "given": "Andres" } }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "id": "O'Neal-J", "name": { "family": "O'Neal", "given": "Jared" } }, { "id": "N'Diaye-M", "name": { "family": "N'Diaye", "given": "Mamadou" }, "orcid": "0000-0002-1721-3294" }, { "id": "Vigan-A", "name": { "family": "Vigan", "given": "Arthur" }, "orcid": "0000-0002-5902-7828" }, { "id": "Mouillet-D", "name": { "family": "Mouillet", "given": "David" } }, { "id": "Beuzit-J-L", "name": { "family": "Beuzit", "given": "Jean-Luc" } }, { "id": "Kasper-M", "name": { "family": "Kasper", "given": "Markus" } }, { "id": "Le-Louarn-M", "name": { "family": "Le Louarn", "given": "Miska" } }, { "id": "Milli-J", "name": { "family": "Milli", "given": "Julien" }, "orcid": "0000-0001-9325-2511" }, { "id": "Dohlen-K", "name": { "family": "Dohlen", "given": "Kjetil" } }, { "id": "Neichel-B", "name": { "family": "Neichel", "given": "Beno\u00eet" } }, { "id": "Bourget-P", "name": { "family": "Bourget", "given": "Pierre" } }, { "id": "Haguenauer-P", "name": { "family": "Haguenauer", "given": "Pierre" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Tackling down the low wind effect on SPHERE instrument", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, adaptive optics, dome seeing", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nPublished - 990916.pdf
", "abstract": "SPHERE is the VLT second generation planet hunter instrument. Installed since May 2014 on UT3, the system has been commissioned and verified for more than one year now and routinely delivers unprecedented images of star surroundings, exoplanets and dust disks. The exceptional performance required for this kind of observation makes the appointment: a repeatable Strehl Ratio of 90% in H band, a rough contrast level of 10-5@0.5 arcsec, and reaches 10-6 at the same separation after differential imaging (SDI, ADI). The instrument also presents high contrast levels in the visible and an unprecedented 17mas diffraction-limited resolution at 0.65 microns wavelength. SAXO is the SPHERE XAO system, allowing the system to reach its final detectivity. Its high performance and therefore highly sensitive capacities turns a new eye on telescope environment. Even if XAO performance are reached as expected, some unexpected limitations are here described and a first work around is proposed and discussed. Spatial limitation: wave-front aberrations have been identified, deviating from kolmogorov statistics, and therefore not easily seen and compensated for by the XAO system. The impact of this limitations results in a degraded performance in some particular low wind conditions. Solutions are developed and tested on sky to propose a new operation procedure reducing this limitation. Temporal limitation: high amplitude vibrations on the low order modes have been issued, due to telescope environment and XAO behaviour. Again, a solution is developed and an assessment of its performance is dressed. The potential application of these solutions to E-ELT is proposed.", "date": "2016-07-26", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 990916", "id_number": "CaltechAUTHORS:20180615-154904987", "isbn": "9781510601970", "book_title": "Adaptive Optics Systems V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180615-154904987", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2232459", "primary_object": { "basename": "990916.pdf", "url": "https://authors.library.caltech.edu/records/qjm8c-q3050/files/990916.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Sauvage, Jean Fran\u00e7ois; Fusco, Thierry; et el." }, { "id": "https://authors.library.caltech.edu/records/gdsr5-nh307", "eprint_id": 72544, "eprint_status": "archive", "datestamp": "2023-08-20 12:58:30", "lastmod": "2024-01-13 20:21:34", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "Elsa" } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "Pierre" } }, { "id": "Femen\u00eca-C", "name": { "family": "Femen\u00eca", "given": "Castell\u00e0" } }, { "id": "Bottom-M", "name": { "family": "Bottom", "given": "Michael" }, "orcid": "0000-0003-1341-5531" }, { "id": "Ngo-Henry-Hoang-Khoi-Exoplanets", "name": { "family": "Ngo", "given": "Henry" }, "orcid": "0000-0001-5172-4859" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } } ] }, "title": "The QACITS pointing sensor: from theory to on-sky operation on Keck/NIRC2", "ispublished": "unpub", "full_text_status": "public", "keywords": "Wavefront sensing, vector vortex coronagraph, tip-tilt sensor, pointing sensor", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nPublished - 990920.pdf
", "abstract": "Small inner working angle coronagraphs are essential to benefit from the full potential of large and future extremely large ground-based telescopes, especially in the context of the detection and characterization of exoplanets. Among existing solutions, the vortex coronagraph stands as one of the most effective and promising solutions. However, for focal-plane coronagraph, a small inner working angle comes necessarily at the cost of a high sensitivity to pointing errors. This is the reason why a pointing control system is imperative to stabilize the star on the vortex center against pointing drifts due to mechanical flexures, that generally occur during observation due for instance to temperature and/or gravity variations. We have therefore developed a technique called QACITS1 (Quadrant Analysis of Coronagraphic Images for Tip-tilt Sensing), which is based on the analysis of the coronagraphic image shape to infer the amount of pointing error. It has been shown that the flux gradient in the image is directly related to the amount of tip-tilt affecting the beam. The main advantage of this technique is that it does not require any additional setup and can thus be easily implemented on all current facilities equipped with a vortex phase mask. In this paper, we focus on the implementation of the QACITS sensor at Keck/NIRC2, where an L-band AGPM has been recently commissioned (June and October 2015), successfully validating the QACITS estimator in the case of a centrally obstructed pupil. The algorithm has been designed to be easily handled by any user observing in vortex mode, which is available for science in shared risk mode since 2016B.", "date": "2016-07-26", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 990920", "id_number": "CaltechAUTHORS:20161205-080638386", "isbn": "978-1-5106-0198-7", "book_title": "Adaptive Optics Systems V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161205-080638386", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2233274", "primary_object": { "basename": "990920.pdf", "url": "https://authors.library.caltech.edu/records/gdsr5-nh307/files/990920.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Huby, Elsa; Absil, Olivier; et el." }, { "id": "https://authors.library.caltech.edu/records/e86vs-yyn43", "eprint_id": 72673, "eprint_status": "archive", "datestamp": "2023-08-20 12:57:01", "lastmod": "2024-01-13 20:22:01", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Jewell-Jeffrey-B", "name": { "family": "Jewell", "given": "Jeffrey" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "title": "Apodized vortex coronagraph designs for segmented aperture telescopes", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2016 SPIE. Society of Photo-Optical Instrumentation Engineers. \n\nThe authors thank Brunella Carlomagno and Olivier Absil from the University of Li\u00e8ge (ULg), Alexis Carlotti from Institute of Planetology and Astrophysics of Grenoble (IPAG), and Christian Delacroix from Cornell University for many fruitful discussions regarding coronagraph performance and optimization. This work was supported by the Exoplanet Exploration Program (ExEP), Jet Propulsion Laboratory, California Institute of Technology, under contract to the National Aeronautics and Space Administration (NASA).\n\nPublished - 99122L.pdf
", "abstract": "Current state-of-the-art high contrast imaging instruments take advantage of a number of elegant coronagraph designs to suppress starlight and image nearby faint objects, such as exoplanets and circumstellar disks. The ideal performance and complexity of the optical systems depends strongly on the shape of the telescope aperture. Unfortunately, large primary mirrors tend to be segmented and have various obstructions, which limit the performance of most conventional coronagraph designs. We present a new family of vortex coronagraphs with numerically-optimized gray-scale apodizers that provide the sensitivity needed to directly image faint exoplanets with large, segmented aperture telescopes, including the Thirty Meter Telescope (TMT) as well as potential next-generation space telescopes.", "date": "2016-07-22", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 99122L", "id_number": "CaltechAUTHORS:20161208-143555472", "isbn": "978-1-5106-0203-8", "book_title": "Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161208-143555472", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Navarro-R", "name": { "family": "Navarro", "given": "Ram\u00f3n" } }, { "id": "Burge-J-H", "name": { "family": "Burge", "given": "James H." } } ] }, "doi": "10.1117/12.2231715", "primary_object": { "basename": "99122L.pdf", "url": "https://authors.library.caltech.edu/records/e86vs-yyn43/files/99122L.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Ruane, Garreth; Jewell, Jeffrey; et el." }, { "id": "https://authors.library.caltech.edu/records/9t5fd-nt533", "eprint_id": 74396, "eprint_status": "archive", "datestamp": "2023-08-20 12:29:12", "lastmod": "2024-01-13 20:24:58", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Matthews-Keith-Astronomy", "name": { "family": "Matthews", "given": "Keith" } }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth J." }, "orcid": "0000-0003-4769-1665" } ] }, "title": "Three years of harvest with the vector vortex coronagraph in the thermal infrared", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, coronagraphy, vortex phase mask, thermal infrared", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nWe thank P. Baudoz and J. Parisot for maintaining and sharing with us the YACADIRE coronagraphic test bench at Observatoire de Paris-Meudon. We also thank all the people involved in the installation, commissioning, and operations of the AGPM at VLT, LBT, and Keck. The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement n. 337569), and from the French Community of Belgium through an ARC grant for Concerted Research Action. The W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA. The LBTI is funded by the National Aeronautics and Space Administration as part of its Exoplanet Exploration Program. The LBT is an international collaboration among institutions in the United States, Italy and Germany. LBT Corporation partners are: The University of Arizona on behalf of the Arizona university\nsystem; Instituto Nazionale di Astrofisica, Italy; LBT Beteiligungsgesellschaft, Germany, representing the Max-Planck Society, the Astrophysical Institute Potsdam, and Heidelberg University; The Ohio State University, and The Research Corporation, on behalf of The University of Notre Dame, University of Minnesota and University of Virginia. This research was supported by NASA's Origins of Solar Systems Program, grant NNX13AJ17G.\n\nPublished - 99080Q.pdf
Submitted - 1607.05003.pdf
", "abstract": "For several years, we have been developing vortex phase masks based on sub-wavelength gratings, known as Annular Groove Phase Masks. Etched onto diamond substrates, these AGPMs are currently designed to be used in the thermal infrared (ranging from 3 to 13 \u03bcm). Our AGPMs were first installed on VLT/NACO and VLT/VISIR in 2012, followed by LBT/LMIRCam in 2013 and Keck/NIRC2 in 2015. In this paper, we review the development, commissioning, on-sky performance, and early scientific results of these new coronagraphic modes and report on the lessons learned. We conclude with perspectives for future developments and applications.", "date": "2016-06-26", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 99080Q", "id_number": "CaltechAUTHORS:20170217-081902812", "isbn": "978-1-5106-0196-3", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170217-081902812", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" }, { "agency": "W. M. Keck Foundation" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "NASA", "grant_number": "NNX13AJ17G" } ] }, "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Simard-L", "name": { "family": "Simard", "given": "Luc" } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2233289", "primary_object": { "basename": "1607.05003.pdf", "url": "https://authors.library.caltech.edu/records/9t5fd-nt533/files/1607.05003.pdf" }, "related_objects": [ { "basename": "99080Q.pdf", "url": "https://authors.library.caltech.edu/records/9t5fd-nt533/files/99080Q.pdf" } ], "resource_type": "book_section", "pub_year": "2016", "author_list": "Absil, Olivier; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.edu/records/6999f-qt772", "eprint_id": 63338, "eprint_status": "archive", "datestamp": "2023-08-20 08:13:32", "lastmod": "2024-01-13 16:30:52", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mazoyer-J", "name": { "family": "Mazoyer", "given": "Johan" }, "orcid": "0000-0002-9133-3091" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Norman-C", "name": { "family": "Norman", "given": "Colin" } }, { "id": "N'Diaye-M", "name": { "family": "N'Diaye", "given": "Mamadou" }, "orcid": "0000-0002-1721-3294" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Soummer-R", "name": { "family": "Soummer", "given": "R\u00e9mi" }, "orcid": "0000-0003-2753-2819" }, { "id": "Perrin-M-D", "name": { "family": "Perrin", "given": "Marshall" }, "orcid": "0000-0002-3191-8151" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "id": "Carlotti-A", "name": { "family": "Carlotti", "given": "Alexis" } } ] }, "title": "Active correction of aperture discontinuities (ACAD) for space telescope pupils: a parametic analysis", "ispublished": "unpub", "full_text_status": "public", "keywords": "Instrumentation, WFIRST-AFTA, High-contrast imaging, adaptive optics, wave-front error correction, deformable mirror", "note": "\u00a9 2015 SPIE. \n\nThis material is based upon work carried out under subcontract #1496556 with the Jet Propulsion Laboratory funded by NASA and administered by the California Institute of Technology.\n\nPublished - 96050M.pdf
", "abstract": "As the performance of coronagraphs improves, the achievable contrast is more and more dependent of the shape of the pupil. The future generation of space and ground based coronagraphic instruments will have to achieve high contrast levels on on-axis and/or segmented telescopes. To correct for the high amplitude aberrations introduced by secondary mirror structures and segmentation of the primary mirror, we explore a two deformable mirror (DM) method. The major difficulty of several DM methods is the non-linear relation linking actuator strokes to the point spread function in the coronagraph focal plane. The Active Compensation of Aperture Discontinuities (ACAD) method is achieving this minimization by solving a non linear differential Monge Ampere equation. Once this open loop method have reached the minimum, a close-loop stroke minimization method can be applied to correct for phase and amplitude aberrations to achieve the ultimate contrast. In this paper, I describe the results of the parametric analysis that that I have undertaken on this method. After recalling the principle of the method, I will described the explored parameter space (deformable mirror set-up, shape of the pupil, bandwidth, coronagraph designs). I will precisely described the way I simulated the Vortex coronagraph for this numerical simulation. Finally I will present the preliminary results of this parametric analysis for space telescope pupils only.", "date": "2015-09-16", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "id_number": "CaltechAUTHORS:20160104-135253801", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160104-135253801", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech", "grant_number": "1496556" } ] }, "contributors": { "items": [ { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2188692", "primary_object": { "basename": "96050M.pdf", "url": "https://authors.library.caltech.edu/records/6999f-qt772/files/96050M.pdf" }, "resource_type": "book_section", "pub_year": "2015", "author_list": "Mazoyer, Johan; Pueyo, Laurent; et el." }, { "id": "https://authors.library.caltech.edu/records/2qsqj-cpy75", "eprint_id": 87176, "eprint_status": "archive", "datestamp": "2023-08-20 08:13:46", "lastmod": "2024-01-14 20:15:21", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Douglas-E-S", "name": { "family": "Douglas", "given": "Ewan S." } }, { "id": "Hewawasam-K", "name": { "family": "Hewawasam", "given": "Kuravi" } }, { "id": "Mendillo-C-B", "name": { "family": "Mendillo", "given": "Christopher B." } }, { "id": "Cahoy-K-L", "name": { "family": "Cahoy", "given": "Kerri L." } }, { "id": "Cook-T-A", "name": { "family": "Cook", "given": "Timothy A." } }, { "id": "Finn-S-C", "name": { "family": "Finn", "given": "Susanna C." } }, { "id": "Howe-G-A", "name": { "family": "Howe", "given": "Glenn A." } }, { "id": "Kuchner-M-J", "name": { "family": "Kuchner", "given": "Marc J." }, "orcid": "0000-0002-2387-5489" }, { "id": "Lewis-N-K", "name": { "family": "Lewis", "given": "Nikole K." }, "orcid": "0000-0002-8507-1304" }, { "id": "Marinan-A-D", "name": { "family": "Marinan", "given": "Anne D." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Charkrabarti-S", "name": { "family": "Chakrabarti", "given": "Supriya" } } ] }, "title": "End-to-end simulation of high-contrast imaging systems: methods and results for the PICTURE mission family", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2015 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was funded by NASA grants NNG05WC17G, NNX11AD53G, and NNX15AG23G and through graduate fellowships awarded to E.S. Douglas by the Massachusetts Space Grant Consortium. Special thanks to Brian Hicks for many helpful conversations. Measurements of telescope mirror reflectivities provided by ISP Optics and typical reflectivities provided by Thorlabs. This research made use of Astropy, a community-developed core Python package for Astronomy; the IPython Interactive Computing architecture; IDL (Exelis Visual Information Solutions, Boulder, Colorado); and the SIMBAD database, operated at CDS, Strasbourg, France.\n\nPublished - 96051A.pdf
", "abstract": "We describe a set of numerical approaches to modeling the performance of space flight high-contrast imaging payloads. Mission design for high-contrast imaging requires numerical wavefront error propagation to ensure accurate component specifications. For constructed instruments, wavelength and angle-dependent throughput and contrast models allow detailed simulations of science observations, allowing mission planners to select the most productive science targets. The PICTURE family of missions seek to quantify the optical brightness of scattered light from extrasolar debris disks via several high-contrast imaging techniques: sounding rocket (the Planet Imaging Concept Testbed Using a Rocket Experiment) and balloon flights of a visible nulling coronagraph, as well as a balloon flight of a vector vortex coronagraph (the Planetary Imaging Concept Testbed Using a Recoverable Experiment - Coronagraph, PICTURE-C). The rocket mission employs an on-axis 0.5m Gregorian telescope, while the balloon flights will share an unobstructed off-axis 0.6m Gregorian. This work details the flexible approach to polychromatic, end-to-end physical optics simulations used for both the balloon vector vortex coronagraph and rocket visible nulling coronagraph missions. We show the preliminary PICTURE-C telescope and vector vortex coronagraph design will achieve 10^(-8) contrast without post-processing as limited by realistic optics, but not considering polarization or low-order errors. Simulated science observations of the predicted warm ring around Epsilon Eridani illustrate the performance of both missions.", "date": "2015-09-16", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 96051A", "id_number": "CaltechAUTHORS:20180615-162745810", "isbn": "9781628417715", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180615-162745810", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "NNG05WC17G" }, { "agency": "NASA", "grant_number": "NNX11AD53G" }, { "agency": "NASA", "grant_number": "NNX15AG23G" }, { "agency": "Massachusetts Space Grant Consortium" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2187262", "primary_object": { "basename": "96051A.pdf", "url": "https://authors.library.caltech.edu/records/2qsqj-cpy75/files/96051A.pdf" }, "resource_type": "book_section", "pub_year": "2015", "author_list": "Douglas, Ewan S.; Hewawasam, Kuravi; et el." }, { "id": "https://authors.library.caltech.edu/records/ypmvp-5qa79", "eprint_id": 63336, "eprint_status": "archive", "datestamp": "2023-08-20 08:13:27", "lastmod": "2024-01-13 16:30:50", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "Stuart" } }, { "id": "Mendillo-C-B", "name": { "family": "Mendillo", "given": "Christopher B." } }, { "id": "Brown-J-M", "name": { "family": "Brown", "given": "Joshua" } }, { "id": "Martel-J", "name": { "family": "Martel", "given": "Jason" } }, { "id": "Howe-G-A", "name": { "family": "Howe", "given": "Glenn A." } }, { "id": "Hewasawan-K", "name": { "family": "Hewasawam", "given": "Kuravi" } }, { "id": "Finn-S-C", "name": { "family": "Finn", "given": "Susanna C." } }, { "id": "Cook-T-A", "name": { "family": "Cook", "given": "Timothy A." } }, { "id": "Charkrabarti-S", "name": { "family": "Chakrabarti", "given": "Supriya" } }, { "id": "Douglas-E-S", "name": { "family": "Douglas", "given": "Ewan S." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Singh-G", "name": { "family": "Singh", "given": "Garima" } }, { "id": "Lozi-J", "name": { "family": "Lozi", "given": "Julien" }, "orcid": "0000-0002-3047-1845" }, { "id": "Cahoy-K-L", "name": { "family": "Cahoy", "given": "Kerri L." } }, { "id": "Marinan-A-D", "name": { "family": "Marinan", "given": "Anne D." } } ] }, "title": "The low-order wavefront sensor for the PICTURE-C mission", "ispublished": "unpub", "full_text_status": "public", "keywords": "exoplanets, exozodiacal dust, debris disks, balloon, direct imaging, fine pointing, wavefront control, high-contrast imaging", "note": "\u00a9 2015 SPIE. \n\nThis work was funded under NASA grant NNX15AG23G S01. Thanks to Jim Lanzi and David Stuchlik at WFF for providing the WASP test flight 2 data.\n\nPublished - 960519.pdf
", "abstract": "The PICTURE-C mission will fly a 60 cm off-axis unobscured telescope and two high-contrast coronagraphs in successive high-altitude balloon flights with the goal of directly imaging and spectrally characterizing visible scattered light from exozodiacal dust in the interior 1-10 AU of nearby exoplanetary systems. The first flight in 2017 will use a 10^(-4) visible nulling coronagraph (previously flown on the PICTURE sounding rocket) and the second flight in 2019 will use a 10^(-7) vector vortex coronagraph. A low-order wavefront corrector (LOWC) will be used in both flights to remove time-varying aberrations from the coronagraph wavefront. The LOWC actuator is a 76-channel high-stroke deformable mirror packaged on top of a tip-tilt stage. This paper will detail the selection of a complementary high-speed, low-order wavefront sensor (LOWFS) for the mission. The relative performance and feasibility of several LOWFS designs will be compared including the Shack-Hartmann, Lyot LOWFS, and the curvature sensor. To test the different sensors, a model of the time-varying wavefront is constructed using measured pointing data and inertial dynamics models to simulate optical alignment perturbations and surface deformation in the balloon environment.", "date": "2015-09-16", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 960519", "id_number": "CaltechAUTHORS:20160104-133428051", "isbn": "978-1-62841-771-5", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160104-133428051", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "NNX15AG23G S01" } ] }, "contributors": { "items": [ { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "S." } } ] }, "doi": "10.1117/12.2188238", "primary_object": { "basename": "960519.pdf", "url": "https://authors.library.caltech.edu/records/ypmvp-5qa79/files/960519.pdf" }, "resource_type": "book_section", "pub_year": "2015", "author_list": "Shaklan, Stuart; Mendillo, Christopher B.; et el." }, { "id": "https://authors.library.caltech.edu/records/sk15e-4jy61", "eprint_id": 63364, "eprint_status": "archive", "datestamp": "2023-08-20 08:11:31", "lastmod": "2024-01-13 16:31:00", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Piron-Pierre", "name": { "family": "Piron", "given": "P." } }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "C." } }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "E." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "M." }, "orcid": "0000-0002-2011-0851" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" } ] }, "title": "A Mach-Zehnder interferometer based on orbital angular momentum for improved vortex coronagraph efficiency", "ispublished": "unpub", "full_text_status": "public", "keywords": "Orbital angular momentum, Coronagraphy, Interferometry, Birefringence, Polarization", "note": "\u00a9 2015 SPIE. \n\nThis work and the author are funded thanks to a European Research Council funding under the European Union's Seventh Framework Program (ERC Grant Agreement n\u25e6337569).\n\nPublished - 96051J.pdf
Submitted - 1605.08033v1.pdf
", "abstract": "The Annular Groove Phase Mask (AGPM) is a vectorial vortex phase mask. It acts as a half-wave plate with a radial fast axis orientation operating in the mid infrared domain. When placed at the focus of a telescope element provides a continuous helical phase ramp for an on axis sources, which creates the orbital angular momentum. Thanks to that phase, the intensity of the central source is canceled by a down-stream pupil stop, while the off axis sources are not affected. However due to experimental conditions the nulling is hardly perfect. To improve the null, a Mach-Zehnder interferometer containing Dove prisms differently oriented can be proposed to sort out light based on its orbital angular momentum (OAM). Thanks to the differential rotation of the beam, a \u03c0 phase shift is achieved for the on axis light affected by a non zero OAM. Therefore the contrast between the star and its faint companion is enhanced. Nevertheless, due the Dove prisms birefringence, the performance of the interferometer is relatively poor. To solve this problem, we propose to add a birefringent wave-plate in each arm to compensate this birefringence. In this paper, we will develop the mathematical model of the wave front using the Jones formalism. The performance of the interferometer is at first computed for the simple version without the birefringent plate. Then the effect of the birefringent plate is be mathematically described and the performance is re-computed.", "date": "2015-09-11", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 96051J", "id_number": "CaltechAUTHORS:20160105-070458470", "isbn": "978-1-62841-771-5", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160105-070458470", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" } ] }, "contributors": { "items": [ { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2189329", "primary_object": { "basename": "96051J.pdf", "url": "https://authors.library.caltech.edu/records/sk15e-4jy61/files/96051J.pdf" }, "related_objects": [ { "basename": "1605.08033v1.pdf", "url": "https://authors.library.caltech.edu/records/sk15e-4jy61/files/1605.08033v1.pdf" } ], "resource_type": "book_section", "pub_year": "2015", "author_list": "Piron, P.; Delacroix, C.; et el." }, { "id": "https://authors.library.caltech.edu/records/t4xk9-wgz48", "eprint_id": 63347, "eprint_status": "archive", "datestamp": "2023-08-20 08:11:24", "lastmod": "2024-01-13 16:30:58", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth J." }, "orcid": "0000-0003-4769-1665" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "Elsa" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "Christian" } }, { "id": "Carlomagno-B", "name": { "family": "Carlomagno", "given": "Brunella" } }, { "id": "Piron-P", "name": { "family": "Piron", "given": "Pierre" } }, { "id": "Swartzlander-G-A", "name": { "family": "Swartzlander", "given": "Grover A." } } ] }, "title": "Optimized focal and pupil plane masks for vortex coronagraphs on telescopes with obstructed apertures", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, instrumentation, exoplanets, direct detection, coronagraphs", "note": "\u00a9 2015 SPIE. \n\nThis work has benefited from computing assistance from Carlos Gomez Gonzalez (Universit\u00e9 de Li\u00e8ge, Belgium) as well as fruitful discussions with Prof. Jean Surdej (Universit\u00e9 de Li\u00e8ge, Belgium) and Prof. Matt Kenworthy (Leiden Observatory, Netherlands). G. J. Ruane was supported by Wallonie-Bruxelles International's (Belgium) Scholarship for Excellence and the U.S. National Science Foundation under Grant No. ECCS-1309517. The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement n. 337569) and from the French Community of Belgium through an ARC grant for Concerted Research Action.\n\nPublished - 96051I.pdf
", "abstract": "We present methods for optimizing pupil and focal plane optical elements that improve the performance of vortex coronagraphs on telescopes with obstructed or segmented apertures. Phase-only and complex masks are designed for the entrance pupil, focal plane, and the plane of the Lyot stop. Optimal masks are obtained using both analytical and numerical methods. The latter makes use of an iterative error reduction algorithm to calculate \"correcting\" optics that mitigate unwanted diffraction from aperture obstructions. We analyze the achieved performance in terms of starlight suppression, contrast, off-axis image quality, and chromatic dependence. Manufacturing considerations and sensitivity to aberrations are also discussed. This work provides a path to joint optimization of multiple coronagraph planes to maximize sensitivity to exoplanets and other faint companions.", "date": "2015-09-11", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 96051I", "id_number": "CaltechAUTHORS:20160104-151248079", "isbn": "978-1-62841-771-5", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160104-151248079", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Wallonie-Bruxelles International's Scholarship for Excellence" }, { "agency": "NSF", "grant_number": "ECCS-1309517" }, { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" } ] }, "contributors": { "items": [ { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2187236", "primary_object": { "basename": "96051I.pdf", "url": "https://authors.library.caltech.edu/records/t4xk9-wgz48/files/96051I.pdf" }, "resource_type": "book_section", "pub_year": "2015", "author_list": "Ruane, Garreth J.; Absil, Olivier; et el." }, { "id": "https://authors.library.caltech.edu/records/dd0v4-qs798", "eprint_id": 57676, "eprint_status": "archive", "datestamp": "2023-08-20 02:52:21", "lastmod": "2024-01-13 16:18:37", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Patru-F", "name": { "family": "Patru", "given": "Fabien" } }, { "id": "Antichi-J", "name": { "family": "Antichi", "given": "Jacopo" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Jolissaint-L", "name": { "family": "Jolissaint", "given": "Laurent" } }, { "id": "Carbillet-M", "name": { "family": "Carbillet", "given": "Marcel" } }, { "id": "Milli-J", "name": { "family": "Milli", "given": "Julien" }, "orcid": "0000-0001-9325-2511" }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien" }, "orcid": "0000-0001-8627-0404" }, { "id": "Rabou-P", "name": { "family": "Rabou", "given": "Patrick" } }, { "id": "Giro-E", "name": { "family": "Giro", "given": "Enrico" } }, { "id": "Mourard-D", "name": { "family": "Mourard", "given": "Denis" } } ] }, "title": "Discretized aperture mapping with a micro-lenses array for interferometric direct imaging", "ispublished": "unpub", "full_text_status": "public", "keywords": "adaptive optique, aliasing, spatial filtering, micro-lenses array", "note": "\u00a9 2014 SPIE.\n\nPublished - 396356.pdf
", "abstract": "Discretized Aperture Mapping (DAM) appears as an original filtering technique easy to play with existing adaptive optics (AO) systems. In its essential DAM operates as an optical passive filter removing part of the phase residuals in the wavefront without introducing any difficult-to-align component in the Fourier conjugate of the entrance pupil plane. DAM reveals as a new interferometric technique combined with spatial filtering allowing direct imaging over a narrow field of view (FOV). In fact, the entrance pupil of a single telescope is divided into many sub-pupils so that the residual phase in each sub-pupil is filtered up to the DAM cut-off frequency. DAM enables to smooth the small scale wavefront defects which correspond to high spatial frequencies in the pupil plane and to low angular frequencies in the image plane. Close to the AO Nyquist frequency, such pupil plane spatial frequencies are not well measured by the wavefront sensor (WFS) due to aliasing. Once bigger than the AO Nyquist frequency, they are no more measured by the WFS due to the fitting limit responsible for the narrow AO FOV. The corresponding image plane angular frequencies are not transmitted by DAM and are useless to image small FOVs, as stated by interferometry. That is why AO and DAM are complementary assuming that the DAM cut-off frequency is equal to the AO Nyquist frequency. Here we describe the imaging capabilities when DAM is placed downstream an AO system, over a convenient pupil which precedes the scientific detector. We show firstly that the imaging properties are preserved on a narrow FOV allowing direct imaging throughout interferometry. Then we show how the residual pupil plane spatial frequencies bigger than the AO Nyquist one are filtered out, as well as the residual halo in the image is dimmed.", "date": "2014-09-05", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "id_number": "CaltechAUTHORS:20150519-152500652", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150519-152500652", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2058594", "primary_object": { "basename": "396356.pdf", "url": "https://authors.library.caltech.edu/records/dd0v4-qs798/files/396356.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Patru, Fabien; Antichi, Jacopo; et el." }, { "id": "https://authors.library.caltech.edu/records/az2mm-kwy92", "eprint_id": 57679, "eprint_status": "archive", "datestamp": "2023-08-20 02:52:31", "lastmod": "2024-01-13 16:18:41", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Fusco-T", "name": { "family": "Fusco", "given": "T." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Final performance and lesson-learned of SAXO, the VLT-SPHERE extreme AO: From early design to on-sky results", "ispublished": "unpub", "full_text_status": "public", "keywords": "Instrumentation: Adaptive Optics, Coronagraph, High Contrast Imaging - Methods: Wavefront Sensing, Control, Phase Diversity, Shack-Hartmann", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). Date Published: 5 September 2014.\n\nPublished - 396358.pdf
", "abstract": "The extreme AO system, SAXO (SPHERE AO for eXoplanet Observation), is the heart of the SPHERE system, feeding the scientific instruments with flat wave front corrected from all the atmospheric turbulence and internal defects. We will present the final performance of SAXO obtained during the instrument AIT in Europe as well as the very first on-sky results. The main requirements and system characteristics will be recalled and the full AO loop performance will be quantified and compared to original specifications. It will be demonstrated that SAXO meets or even exceeds (especially its limit magnitude and its jitter residuals) its challenging requirements (more than 90% of SR in H band and a 3 mas residual jitter). Finally, after 10 years of AO developments, from early design to final on-sky implementations, some critical system aspects as well as some important lesson-learned will be presented in the perspective of the future generation of complex AO systems for VLTs and ELTs.", "date": "2014-09-05", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 91481U", "id_number": "CaltechAUTHORS:20150520-070332046", "isbn": "9780819496164", "book_title": "Adaptive Optics Systems IV", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-070332046", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2055423", "primary_object": { "basename": "396358.pdf", "url": "https://authors.library.caltech.edu/records/az2mm-kwy92/files/396358.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Fusco, T. and Mawet, D." }, { "id": "https://authors.library.caltech.edu/records/ybj3q-jch86", "eprint_id": 57738, "eprint_status": "archive", "datestamp": "2023-08-20 02:52:37", "lastmod": "2024-01-13 16:19:13", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Defr\u00e8re-D", "name": { "family": "Defr\u00e8re", "given": "D." }, "orcid": "0000-0003-3499-2506" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Hinz-P-M", "name": { "family": "Hinz", "given": "P." }, "orcid": "0000-0002-1954-4564" }, { "id": "K\u00fchn-J", "name": { "family": "K\u00fchn", "given": "J." }, "orcid": "0000-0002-6344-4835" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "B." }, "orcid": "0000-0003-4205-4800" }, { "id": "Skemer-A-J", "name": { "family": "Skemer", "given": "A." }, "orcid": "0000-0001-6098-3924" }, { "id": "Wallace-K", "name": { "family": "Wallace", "given": "K." } }, { "id": "Bailey-V-P", "name": { "family": "Bailey", "given": "V." }, "orcid": "0000-0002-5407-2806" }, { "id": "Downey-E", "name": { "family": "Downey", "given": "E." } }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "C." } }, { "id": "Durney-O", "name": { "family": "Durney", "given": "O." } }, { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "P." } }, { "id": "Gomez-C", "name": { "family": "Gomez", "given": "C." } }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } }, { "id": "Hoffmann-W-F", "name": { "family": "Hoffmann", "given": "W. F." } }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "M." }, "orcid": "0000-0002-2011-0851" }, { "id": "Kenworthy-M-A", "name": { "family": "Kenworthy", "given": "M." }, "orcid": "0000-0002-7064-8270" }, { "id": "Leisenring-J-M", "name": { "family": "Leisenring", "given": "J." }, "orcid": "0000-0002-0834-6140" }, { "id": "Montoya-M", "name": { "family": "Montoya", "given": "M." } }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "L." }, "orcid": "0000-0003-3818-408X" }, { "id": "Skrutskie-M-F", "name": { "family": "Skrutskie", "given": "M." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" } ] }, "title": "L'-band AGPM vector vortex coronagraph's first light on LBTI/LMIRCam", "ispublished": "unpub", "full_text_status": "public", "keywords": "LBT, Adaptive Optics, coronagraphy, vortex phase mask, HR8799", "note": "2014 Society of Photo-Optical Instrumentation Engineers (SPIE). Date Published: 21 July 2014. \n\nLBTI is funded by a NASA grant in support of the Exoplanet Exploration Program (NSF 0705296). The LBT is an international collaboration among institutions in the United States, Italy and Germany. LBT Corporation partners are: The University of Arizona on behalf of the Arizona university system; Istituto Nazionale di Astro Fisica, Italy; LBT Beteiligungsgesellschaft, Germany, representing the Max-Planck Society, the Astrophysical Institute Potsdam, and Heidelberg University; The Ohio State University, and The Research Corporation, on behalf of The University of Notre Dame, University of Minnesota and University of Virginia. The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement n.337569) and from the French Community of Belgium through an ARC grant for Concerted Research Actions. O.A. is a Research Associate of the F.R.S.-FNRS (Belgium).\n\nPublished - 396370.pdf
Submitted - 1410.6244v1.pdf
", "abstract": "We present the first observations obtained with the L'-band AGPM vortex coronagraph recently installed on LBTI/LMIRCam. The AGPM (Annular Groove Phase Mask) is a vector vortex coronagraph made from diamond subwavelength gratings. It is designed to improve the sensitivity and dynamic range of high-resolution imaging at very small inner working angles, down to 0.09 arcseconds in the case of LBTI/LMIRCam in the L' band. During the first hours on sky, we observed the young A5V star HR8799 with the goal to demonstrate the AGPM performance and assess its relevance for the ongoing LBTI planet survey (LEECH). Preliminary analyses of the data reveal the four known planets clearly at high SNR and provide unprecedented sensitivity limits in the inner planetary system (down to the diffraction limit of 0.09 arcseconds).", "date": "2014-09-05", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 91483X", "id_number": "CaltechAUTHORS:20150521-105503591", "isbn": "9780819496164", "book_title": "Adaptive Optics Systems IV", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-105503591", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "NSF 0705296" }, { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" }, { "agency": "Fonds de la Recherche Scientifique (FNRS)" } ] }, "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2057205", "primary_object": { "basename": "1410.6244v1.pdf", "url": "https://authors.library.caltech.edu/records/ybj3q-jch86/files/1410.6244v1.pdf" }, "related_objects": [ { "basename": "396370.pdf", "url": "https://authors.library.caltech.edu/records/ybj3q-jch86/files/396370.pdf" } ], "resource_type": "book_section", "pub_year": "2014", "author_list": "Defr\u00e8re, D.; Absil, O.; et el." }, { "id": "https://authors.library.caltech.edu/records/2pc0c-c1x71", "eprint_id": 57678, "eprint_status": "archive", "datestamp": "2023-08-20 02:52:26", "lastmod": "2024-01-13 16:18:39", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Smette-A", "name": { "family": "Smette", "given": "Alain" } }, { "id": "Sarazin-M-S", "name": { "family": "Sarazin", "given": "Marc S." } }, { "id": "Kuntschner-H", "name": { "family": "Kuntschner", "given": "Harald" } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien H." }, "orcid": "0000-0001-8627-0404" } ] }, "title": "Real-time Strehl and image quality performance estimator at Paranal Observatory", "ispublished": "unpub", "full_text_status": "public", "keywords": "Adaptive Optics, Very Large Telescope, Strehl ratio, Observation scheduling, Quality Control,\nScience operations", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). Date Published: 5 September 2014.\n\nThis work was carried out at the European Southern Observatory (ESO) site of Paranal, Vitacura (Santiago, Chile), and Garching (Germany).\n\nPublished - 396357.pdf
", "abstract": "Here we describe a prototype Strehl and image quality performance estimator and its integration into Paranal operations, starting with UT4 and its suite of three infrared instruments: adaptive optics-fed imager/spectrograph NACO (temporarily out of operations) and integral field unit SINFONI, as well as wide-field imager HAWK-I. The real-time estimator processes the ambient conditions (seeing, coherence time, airmass, etc.) from the DIMM, and telescope Shack-Hartmann image analyzer to produce estimates of image quality and Strehl ratio every ~ 30 seconds. The estimate is using ad-hoc instrumental models, based in part on the PAOLA adaptive optics simulator. We discuss the current performance of the estimator vs real IQ and Strehl measurements, its impact on service mode efficiency, prospects for full deployment at other UTs, its use for the adaptive optics facility (AOF), and inclusion of the SLODAR-measured fine turbulence characteristics.", "date": "2014-09-05", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 91484T", "id_number": "CaltechAUTHORS:20150520-064945282", "isbn": "9780819496164", "book_title": "Adaptive Optics Systems IV", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-064945282", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Southern Observatory (ESO)" } ] }, "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2057263", "primary_object": { "basename": "396357.pdf", "url": "https://authors.library.caltech.edu/records/2pc0c-c1x71/files/396357.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Mawet, Dimitri; Smette, Alain; et el." }, { "id": "https://authors.library.caltech.edu/records/4xjtv-gg634", "eprint_id": 57739, "eprint_status": "archive", "datestamp": "2023-08-20 02:52:43", "lastmod": "2024-01-13 16:19:15", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "Christian" } }, { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "Pontus" } }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "Mikael" }, "orcid": "0000-0002-2011-0851" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "Serge" } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" }, { "id": "Absil-Pierre-Antoine", "name": { "family": "Absil", "given": "Pierre-Antoine" }, "orcid": "0000-0003-2946-4178" }, { "id": "Carlomagno-B", "name": { "family": "Carlomagno", "given": "Brunella" } }, { "id": "Christiaens-V", "name": { "family": "Christiaens", "given": "Valentin" }, "orcid": "0000-0002-0101-8814" }, { "id": "Defr\u00e8re-D", "name": { "family": "Defr\u00e8re", "given": "Denis" }, "orcid": "0000-0003-3499-2506" }, { "id": "G\u00f3mez-Gonz\u00e1lez-C-A", "name": { "family": "Gomez Gonzales", "given": "Carlos" }, "orcid": "0000-0003-2050-1710" }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "Elsa" } }, { "id": "Jolivet-A", "name": { "family": "Jolivet", "given": "A\u0457ssa" } }, { "id": "Milli-J", "name": { "family": "Milli", "given": "Julien" }, "orcid": "0000-0001-9325-2511" }, { "id": "Piron-P", "name": { "family": "Piron", "given": "Pierre" } }, { "id": "Vargas-Catalan-E", "name": { "family": "Vargas Catalan", "given": "Ernesto" } }, { "id": "Van-Droogenbroeck-M", "name": { "family": "Van Droogenbroeck", "given": "Marc" } } ] }, "title": "The VORTEX project: first results and perspectives", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanets, high contrast imaging, coronagraphy, vortex phase mask", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). Date Published: 21 July 2014.\n\nThe research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement n.337569) and from the French Community of Belgium through an ARC grant for Concerted Research Actions. O.A. is a Research Associate of the F.R.S.-FNRS (Belgium). The early successes of this project wouldn't have been possible without the contributions of many collaborators outside the co-authors of this paper (aka the \\VORTEX team\"). We would\nlike to thank particularly P. Riaud and J. Baudrand for their decisive contributions to the genesis of this project, A. Boccaletti and P. Baudoz for maintaining and sharing with us their coronagraphic test bench at Observatoire de Paris-Meudon, E. Pantin and the CEA team for inviting and helping us to piggyback on the VISIR upgrade, J. Girard and the excellent ESO staff for making possible the installation of the AGPM on NACO, P. Hinz\nand A. Skemer for installing one of our L-band AGPMs on LMIRCam, B. Mennesson and K. Wallace for manufacturing optimized Lyot stops for the AGPM on LMIRCam, R. Olivier for designing and manufacturing the opto-mechanical interfaces for the AGPM, D. Vandormael for printing centering cross hairs on some of our AGPMs, J.-F. Fagnard for cryo-testing the AGPMs, and finally C. Hanot for his many contributions to this endeavor.\n\nPublished - 396371.pdf
Submitted - 1410.5635v1.pdf
", "abstract": "Vortex coronagraphs are among the most promising solutions to perform high contrast imaging at small angular\nseparations from bright stars. They feature a very small inner working angle (down to the diffraction limit of\nthe telescope), a clear 360 degree discovery space, have demonstrated very high contrast capabilities, are easy\nto implement on high-contrast imaging instruments, and have already been extensively tested on the sky. Since 2005, we have been designing, developing and testing an implementation of the charge-2 vector vortex phase mask based on concentric sub-wavelength gratings, referred to as the Annular Groove Phase Mask (AGPM). Science-grade mid-infrared AGPMs were produced in 2012 for the first time, using plasma etching on synthetic diamond substrates. They have been validated on a coronagraphic test bench, showing broadband peak rejection up to 500:1 in the L band, which translates into a raw contrast of about 6 x 10^(-5) at 2\u22cb=D. Three of them have now been installed on world-leading diffraction-limited infrared cameras, namely VLT/NACO, VLT/VISIR and LBT/LMIRCam. During the science verification observations with our L-band AGPM on NACO, we observed the beta Pictoris system and obtained unprecedented sensitivity limits to planetary companions down to the diffraction limit (0.1\"). More recently, we obtained new images of the HR 8799 system at L band during the AGPM first light on LMIRCam. After reviewing these first results obtained with mid-infrared AGPMs, we will\ndiscuss the short- and mid-term goals of the on-going VORTEX project, which aims to improve the performance of our vortex phase masks for future applications on second-generation high-contrast imager and on future extremely large telescopes (ELTs). In particular, we will briefly describe our current efforts to improve the manufacturing of mid-infrared AGPMs, to push their operation to shorter wavelengths, and to provide deeper starlight extinction by creating new designs for higher topological charge vortices. Within the VORTEX project, we also plan to develop new image processing techniques tailored to coronagraphic images, and to study some pre- and post-coronagraphic concepts adapted to the vortex coronagraph in order to reduce scattered starlight\nin the final images.", "date": "2014-09-05", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "id_number": "CaltechAUTHORS:20150521-114932586", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-114932586", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" } ] }, "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2055702", "primary_object": { "basename": "1410.5635v1.pdf", "url": "https://authors.library.caltech.edu/records/4xjtv-gg634/files/1410.5635v1.pdf" }, "related_objects": [ { "basename": "396371.pdf", "url": "https://authors.library.caltech.edu/records/4xjtv-gg634/files/396371.pdf" } ], "resource_type": "book_section", "pub_year": "2014", "author_list": "Absil, Olivier; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.edu/records/6ptfn-82t94", "eprint_id": 57710, "eprint_status": "archive", "datestamp": "2023-08-20 02:52:00", "lastmod": "2024-01-13 16:18:55", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Shelton-Christopher", "name": { "family": "Shelton", "given": "Chris" }, "orcid": "0000-0001-8982-1654" }, { "id": "Wallace-James-C", "name": { "family": "Wallace", "given": "James" } }, { "id": "Bottom-Michael", "name": { "family": "Bottom", "given": "Michael" }, "orcid": "0000-0003-1341-5531" }, { "id": "K\u00fchn-Jonas-G", "name": { "family": "K\u00fchn", "given": "Jonas" } }, { "id": "Mennesson-Bertrand", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Burruss-Rick-S", "name": { "family": "Burruss", "given": "Rick" } }, { "id": "Bartos-Randy-D", "name": { "family": "Bartos", "given": "Randy" } }, { "id": "Pueyo-Laurent", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Carlotti-Alexis", "name": { "family": "Carlotti", "given": "Alexis" }, "orcid": "0000-0002-5859-0141" }, { "id": "Serabyn-Eugene", "name": { "family": "Serabyn", "given": "Eugene" } } ] }, "title": "Demonstration of vortex coronagraph concepts for on-axis telescopes on the Palomar Stellar Double Coronagraph", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nDate Published: 4 September 2014.\n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.\n\nPublished - 396364.pdf
", "abstract": "Here we present preliminary results of the integration of two recently proposed vortex coronagraph (VC) concepts for on-axis telescopes on the Stellar Double Coronagraph (SDC) bench behind PALM-3000, the extreme adaptive optics system of the 200-inch Hale telescope of Palomar observatory. The multi-stage vortex coronagraph (MSVC) uses the ability of the vortex to move light in and out of apertures through multiple VC in series to restore the nominal attenuation capability of the charge 2 vortex regardless of the aperture obscurations. The ring-apodized vortex coronagraph (RAVC) is a one-stage apodizer exploiting the VC Lyot-plane amplitude distribution in order to perfectly null the diffraction from any central obscuration size, and for any vortex topological charge. The RAVC is thus a simple concept that makes the VC immune to diffraction effects of the secondary mirror. It combines a vortex phase mask in the image plane with a single pupil-based amplitude ring apodizer, tailor-made to exploit the unique convolution properties of the VC at the Lyot-stop plane. The prototype apodizer uses the same microdot technology that was used to manufacture the apodized pupil Lyot coronagraph (APLC) equipping SPHERE, GPI and P1640.", "date": "2014-09-04", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "id_number": "CaltechAUTHORS:20150520-113150067", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-113150067", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Oschmann-J-M-Jr", "name": { "family": "Oschmann", "given": "Jacobus M., Jr." } }, { "id": "Clampin-Mark-C", "name": { "family": "Clampin", "given": "Mark" } }, { "id": "Fazio-Giovanni-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "MacEwen-Howard-A", "name": { "family": "MacEwen", "given": "Howard A." } } ] }, "doi": "10.1117/12.2057274", "primary_object": { "basename": "396364.pdf", "url": "https://authors.library.caltech.edu/records/6ptfn-82t94/files/396364.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Mawet, Dimitri; Shelton, Chris; et el." }, { "id": "https://authors.library.caltech.edu/records/g3bxp-x3925", "eprint_id": 87177, "eprint_status": "archive", "datestamp": "2023-08-20 02:39:59", "lastmod": "2024-01-14 20:15:23", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Pueyo-Laurent", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Norman-Colin", "name": { "family": "Norman", "given": "Colin" } }, { "id": "Soummer-R\u00e9mi", "name": { "family": "Soummer", "given": "R\u00e9mi" }, "orcid": "0000-0003-2753-2819" }, { "id": "Perrin-M-D", "name": { "family": "Perrin", "given": "Marshall" }, "orcid": "0000-0002-3191-8151" }, { "id": "N'Diaye-Mamadou", "name": { "family": "N'Diaye", "given": "Mamadou" }, "orcid": "0000-0002-1721-3294" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "id": "Hoffmann-Jordan", "name": { "family": "Hoffmann", "given": "Jordan" } }, { "id": "Carlotti-Alexis", "name": { "family": "Carlotti", "given": "Alexis" }, "orcid": "0000-0002-5859-0141" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "High contrast imaging with an arbitrary aperture: active correction of aperture discontinuities: fundamental limits and practical trade-offs", "ispublished": "unpub", "full_text_status": "public", "keywords": "planetary systems - techniques: coronagraphy, wavefront control", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis material is partially based upon work supported by the National Aeronautics and Space Administration under Grant NNX12AG05G issued through the Astrophysics Research and Analysis (APRA) program. This work was performed in part under contract with the California Institute of Technology funded by NASA through the Sagan Fellowship Program executed by the NASA Exoplanet Science Institute. This material is also partially based upon work carried out under subcontract 1496556 with the Jet Propulsion Laboratory funded by NASA and administered by the California Institute of Technology.\n\nPublished - 914321.pdf
", "abstract": "We present a new method to achieve high-contrast images using segmented and/or on-axis telescopes. Our approach relies on using two sequential Deformable Mirrors to compensate for the large amplitude excursions in the telescope aperture due to secondary support structures and / or segment gaps. We solve the highly non-linear Monge-Ampere equation that is the fundamental equation describing the physics of phase induced amplitude modulation. We determine the optimum configuration for our two sequential Deformable Mirror system and show that high-throughput and high contrast solutions can be achieved using realistic surface deformations that are accessible using existing technologies. We name this process Active Compensation of Aperture Discontinuities (ACAD). We show that for geometries similar to JWST, ACAD can attain at least 10-7 in contrast and an order of magnitude higher for future Extremely Large Telescopes, even when the pupil features a \"missing segment\" . Because the converging non-linear mappings resulting from our Deformable Mirror shapes damps near-field diffraction artifacts in the vicinity of the discontinuities this solution is particularly appealing in terms of spectral bandwidth. We present preliminary results that illustrate the performances of ACAD in the presence of diffraction for apertures for with secondary support structures of varying width and argue that the ultimate contrast achieved can by combining ACAD with modern wavefront control algorithms.", "date": "2014-08-28", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 914321", "id_number": "CaltechAUTHORS:20180615-163734593", "isbn": "9780819496119", "book_title": "Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180615-163734593", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "NNX12AG05G" }, { "agency": "NASA Sagan Fellowship" }, { "agency": "NASA/JPL/Caltech", "grant_number": "1496556" } ] }, "contributors": { "items": [ { "id": "Oschmann-Jacobus-M", "name": { "family": "Oschmann", "given": "Jacobus M." } }, { "id": "Clampin-Mark-C", "name": { "family": "Clampin", "given": "Mark" } }, { "id": "Fazio-Giovanni-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "MacEwen-Hoawrd-A", "name": { "family": "MacEwen", "given": "Howard A." } } ] }, "doi": "10.1117/12.2056925", "primary_object": { "basename": "914321.pdf", "url": "https://authors.library.caltech.edu/records/g3bxp-x3925/files/914321.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Pueyo, Laurent; Norman, Colin; et el." }, { "id": "https://authors.library.caltech.edu/records/tpsn4-skp04", "eprint_id": 57717, "eprint_status": "archive", "datestamp": "2023-08-20 02:39:43", "lastmod": "2024-01-13 16:18:57", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Marois-Christian", "name": { "family": "Marois", "given": "Christian" }, "orcid": "0000-0002-4164-4182" }, { "id": "Bradly-Colin", "name": { "family": "Bradley", "given": "Colin" } }, { "id": "Pazder-John", "name": { "family": "Pazder", "given": "John" } }, { "id": "Nash-Reston", "name": { "family": "Nash", "given": "Reston" } }, { "id": "Metchev-Stanimir", "name": { "family": "Metchev", "given": "Stanimir" }, "orcid": "0000-0003-3050-8203" }, { "id": "Grandmont-Fr\u00e9d\u00e9ric", "name": { "family": "Grandmont", "given": "Fr\u00e9d\u00e9ric" } }, { "id": "Maire-Anne-Lise", "name": { "family": "Maire", "given": "Anne-Lise" }, "orcid": "0000-0002-2591-4138" }, { "id": "Belikov-Ruslan", "name": { "family": "Belikov", "given": "Ruslan" } }, { "id": "Macintosh-Bruce-A", "name": { "family": "Macintosh", "given": "Bruce" }, "orcid": "0000-0003-1212-7538" }, { "id": "Currie-Thayne", "name": { "family": "Currie", "given": "Thayne" }, "orcid": "0000-0002-7405-3119" }, { "id": "Galicher-Rapha\u00ebl", "name": { "family": "Galicher", "given": "Rapha\u00ebl" } }, { "id": "Marchis-Franck", "name": { "family": "Marchis", "given": "Franck" }, "orcid": "0000-0001-7016-7277" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Serabyn-Eugene", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Steinbring-Erin", "name": { "family": "Steinbring", "given": "Eric" } } ] }, "title": "MAPLE: Reflected Light from Exoplanets with a 50-cm Diameter Stratospheric Balloon Telescope", "ispublished": "unpub", "full_text_status": "public", "keywords": "Planetary Systems, Exoplanets, High-Contrast Imaging, Reflected Light, Space Observatory, Wavefront Control, Coronagraph", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nPublished - 396365.pdf
", "abstract": "Detecting light reflected from exoplanets by direct imaging is the next major milestone in the search for, and characterization of, an Earth twin. Due to the high-risk and cost associated with satellites and limitations imposed by the atmosphere for ground-based instruments, we propose a bottom-up approach to reach that ultimate goal with an endeavor named MAPLE. MAPLE first project is a stratospheric balloon experiment called MAPLE-50. MAPLE-50 consists of a 50 cm diameter off-axis telescope working in the near-UV. The advantages of the near-UV are a small inner working angle and an improved contrast for blue planets. Along with the sophisticated tracking system to mitigate balloon pointing errors, MAPLE-50 will have a deformable mirror, a vortex coronograph, and a self-coherent camera as a focal plane wavefront-sensor which employs an Electron Multiplying CCD (EMCCD) as the science detector. The EMCCD will allow photon counting at kHz rates, thereby closely tracking telescope and instrument-bench-induced aberrations as they evolve with time. In addition, the EMCCD will acquire the science data with almost no read noise penalty. To mitigate risk and lower costs, MAPLE-50 will at first have a single optical channel with a minimum of moving parts. The goal is to reach a few times 109 contrast in 25 h worth of flying time, allowing direct detection of Jovians around the nearest stars. Once the 50 cm infrastructure has been validated, the telescope diameter will then be increased to a 1.5 m diameter (MAPLE-150) to reach 1010 contrast and have the capability to image another Earth.", "date": "2014-08-28", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 91432R", "id_number": "CaltechAUTHORS:20150520-134448057", "isbn": "9780819496119", "book_title": "Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-134448057", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Oschmann-Jacobus-M", "name": { "family": "Oschmann", "given": "Jacobus M., Jr." } }, { "id": "Clampin-Mark-C", "name": { "family": "Clampin", "given": "Mark" } }, { "id": "Fazio-Giovanni-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "MacEwen-Howard-A", "name": { "family": "MacEwen", "given": "Howard A." } } ] }, "corp_creators": { "items": [ "MAPLE science team" ] }, "doi": "10.1117/12.2056747", "primary_object": { "basename": "396365.pdf", "url": "https://authors.library.caltech.edu/records/tpsn4-skp04/files/396365.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Marois, Christian; Bradley, Colin; et el." }, { "id": "https://authors.library.caltech.edu/records/908wy-pj632", "eprint_id": 57740, "eprint_status": "archive", "datestamp": "2023-08-20 02:27:19", "lastmod": "2024-01-13 16:19:17", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "de-Boer-J", "name": { "family": "de Boer", "given": "Joshua" } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien H." }, "orcid": "0000-0001-8627-0404" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Snik-F", "name": { "family": "Snik", "given": "Frans" } }, { "id": "Keller-C-U", "name": { "family": "Keller", "given": "Christoph U." } }, { "id": "Milli-J", "name": { "family": "Milli", "given": "Julien" }, "orcid": "0000-0001-9325-2511" } ] }, "title": "Characterizing Instrumental Effects on Polarization at a Nasmyth focus using NaCo", "ispublished": "unpub", "full_text_status": "public", "keywords": "instrumental polarization, crosstalk, calibration scheme, polarimetric differential imaging, high contrast imaging, NAOS-COKICA, SPHERE/ZIJVIPOL, SPHERE/IRDIS", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). Paper Date Published: 28 July 2014.\n\nJdB acknowledges ESO for its support provided with the studentship program. We furthermore thank ESO staff\nof the Paranal Observatory for their support during the observations, especially Fernando Salgado.\n\nPublished - 396372.pdf
", "abstract": "We propose a new calibration scheme to determine the instrumental polarization (IP) and crosstalk induced by either the telescope or an instrument at Nasmyth focus. We measure the polarized blue sky at zenith with VLT/UT4/NaCo for different NaCo derotator and telescope azimuth angles. Taking multiple measurements after rotating both the instrument and the telescope with angles of 90\u00b0 allows use to determine the IP and most crosstalk components separately for the telescope and the instrument. This separation of the Mueller matrices of UT4 and the NaCo is especially important for measurements taken in the conventional polarimetric mode (field stabilized), because the rotation of the instrument with respect to M3 causes a variation in the IP and crosstalk throughout the measurement. The technique allows us to determine the IP with an accuracy of 0.4%, and constrain or determine lower or upper limits for most crosstalk components. Most notably, the UT4 U \u2192 V crosstalk is substantially larger than theory predicts. An angular offset in NaCo's half wave plate orientation is a possible source of systematic errors. We measure this offset to be 1.8\u00b0 \u00b1 0.5\u00b0.", "date": "2014-08-07", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 914787", "id_number": "CaltechAUTHORS:20150521-121335028", "isbn": "9780819496157", "book_title": "Ground-based and Airborne Instrumentation for Astronomy V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-121335028", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Ramsay-S-K", "name": { "family": "Ramsay", "given": "Suzanne K." } }, { "id": "McLean-I-S", "name": { "family": "McLean", "given": "Ian S." } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2054970", "primary_object": { "basename": "396372.pdf", "url": "https://authors.library.caltech.edu/records/908wy-pj632/files/396372.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "de Boer, Joshua; Girard, Julien H.; et el." }, { "id": "https://authors.library.caltech.edu/records/mv2qw-c9h22", "eprint_id": 57681, "eprint_status": "archive", "datestamp": "2023-08-20 02:27:09", "lastmod": "2024-01-13 16:18:45", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Carlomagno-B", "name": { "family": "Carlomagno", "given": "Brunella" } }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "Christian" } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "Pontus" } }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "Serge" } }, { "id": "Jolivet-A", "name": { "family": "Jolivet", "given": "A\u0457ssa" } }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "Mikael" }, "orcid": "0000-0002-2011-0851" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Piron-P", "name": { "family": "Piron", "given": "Pierre" } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" }, { "id": "Vargas-Catalan-E", "name": { "family": "Vargas Catalan", "given": "Ernesto" } } ] }, "title": "Mid-IR AGPMs for ELT applications", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanets detection, Mid-IR, Vector Vortex Corona.graphs, E-ELT / METIS instrument", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). Date Published: 7 August 2014.\n\nThe research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement n.337569) and from the French Community of Belgium through an ARC grant for Concerted Research Actions.\n\nPublished - 396360.pdf
", "abstract": "The mid-infrared region is well suited for exoplanet detection thanks to the reduced contrast between the planet and its host star with respect to the visible and near-infrared wavelength regimes. This contrast may be further improved with Vector Vortex Coronagraphs (VVCs), which allow us to cancel the starlight. One flavour of the VVC is the AGPM (Annular Groove Phase Mask), which adds the interesting properties of subwavelength gratings (achromaticity, robustness) to the already known properties of the VVC. In this paper, we present the optimized designs, as well as the expected performances of mid-IR AGPMs etched onto synthetic diamond substrates, which are considered for the E-ELT/METIS instrument.", "date": "2014-08-07", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 914799", "id_number": "CaltechAUTHORS:20150520-074114061", "isbn": "9780819496157", "book_title": "Ground-based and Airborne Instrumentation for Astronomy V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-074114061", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique" } ] }, "contributors": { "items": [ { "id": "Ramsay-S-K", "name": { "family": "Ramsay", "given": "Suzanne K." } }, { "id": "McLean-I-S", "name": { "family": "McLean", "given": "Ian S." } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2056280", "primary_object": { "basename": "396360.pdf", "url": "https://authors.library.caltech.edu/records/mv2qw-c9h22/files/396360.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Carlomagno, Brunella; Delacroix, Christian; et el." }, { "id": "https://authors.library.caltech.edu/records/7dyqq-5c998", "eprint_id": 57737, "eprint_status": "archive", "datestamp": "2023-08-20 02:27:14", "lastmod": "2024-01-13 16:19:11", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "Pontus" } }, { "id": "Vargas-E", "name": { "family": "Vargas", "given": "Ernesto" } }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "Christian" } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Carlomagno-B", "name": { "family": "Carlomagno", "given": "Brunella" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "Serge" } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "Mikael" }, "orcid": "0000-0002-2011-0851" } ] }, "title": "Realizing the diamond annular groove phase masks for the mid infrared region - five years of successful process development of diamond plasma etching", "ispublished": "unpub", "full_text_status": "public", "keywords": "Gratings, diamond, coronagraphy, microfabrication", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). Date Published: 7 August 2014.\n\nThe research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement n.337569) and from the French Community of Belgium through an ARC grant for Concerted Research Actions. O.A. is a Research Associate of the F.R.S.-FNRS (Belgium).\n\nPublished - 396369.pdf
", "abstract": "The Annular Groove Phase Mask (AGPM) is a circularly symmetric half wave plate consisting of a circular high aspect ratio sub-wavelength grating. Here we present a method for realizing such structures in diamond. To improve the AGPM performance, antireflective sub-wavelength gratings are etched on the backside of the components, and such gratings are also discussed. Components for the N-band (around 10 \u03bcm) and the L-band (around 3.8 \u03bcm) have been successfully fabricated. We are currently developing the process further to improve the precision of the gratings and produce an AGPM for the K-band (around 2.2 \u03bcm).", "date": "2014-08-07", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 915119", "id_number": "CaltechAUTHORS:20150521-103828598", "isbn": "9780819496195", "book_title": "Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-103828598", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" }, { "agency": "Fonds de la Recherche Scientifique (FNRS)" } ] }, "contributors": { "items": [ { "id": "Navarro-R", "name": { "family": "Navarro", "given": "Ram\u00f3n" } }, { "id": "Cunningham-C-R", "name": { "family": "Cunningham", "given": "Colin R." } }, { "id": "Barto-A-A", "name": { "family": "Barto", "given": "Allison A." } } ] }, "doi": "10.1117/12.2055475", "primary_object": { "basename": "396369.pdf", "url": "https://authors.library.caltech.edu/records/7dyqq-5c998/files/396369.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Forsberg, Pontus; Vargas, Ernesto; et el." }, { "id": "https://authors.library.caltech.edu/records/m4w6r-vs570", "eprint_id": 57680, "eprint_status": "archive", "datestamp": "2023-08-20 02:27:04", "lastmod": "2024-01-13 16:18:43", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Carlotti-A", "name": { "family": "Carlotti", "given": "Alexis" } }, { "id": "N'Diaye-M", "name": { "family": "N'Diaye", "given": "Mamadou" }, "orcid": "0000-0002-1721-3294" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Three possible types of coronagraphs for the E-ELT PCS instrument", "ispublished": "unpub", "full_text_status": "public", "keywords": "High-contrast imaging, coronagraphy, exoplanets, apodization", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). Date Published: 7 August 2014.\n\nPublished - 396359.pdf
", "abstract": "The spectral characterization in the near infrared of Neptune-like planets and super-Earths is one of the main science objectives of the E-ELT. The planetary camera and spectrograph (PCS) will be in charge of making it possible. We have designed three different instruments: pure apodizers, apodized Lyot coronagraphs, and apodized vortex coronagraphs. In each cases the central obscuration and the secondary supports are taken into account in the design of the apodizer. We present a trade study of the imaging performance of these coronagraphs, and we describe how sensitive these coronagraphs are to various aberrations. This is used to assess the potential complementarity between these three types of instruments. Finally, we also consider the feasibility of an active control of aperture discontinuities and/or a phase induced amplitude apodization using the two deformable mirrors of an extreme adaptive optics system associated with the coronagraphs.", "date": "2014-08-07", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 91479D", "id_number": "CaltechAUTHORS:20150520-071815376", "isbn": "9780819496157", "book_title": "Ground-based and Airborne Instrumentation for Astronomy V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-071815376", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Ramsay-S-K", "name": { "family": "Ramsay", "given": "Suzanne K." } }, { "id": "McLean-I-S", "name": { "family": "McLean", "given": "Ian S." } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2056842", "primary_object": { "basename": "396359.pdf", "url": "https://authors.library.caltech.edu/records/m4w6r-vs570/files/396359.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Carlotti, Alexis; N'Diaye, Mamadou; et el." }, { "id": "https://authors.library.caltech.edu/records/y744j-zk875", "eprint_id": 57674, "eprint_status": "archive", "datestamp": "2023-08-20 02:26:00", "lastmod": "2024-01-13 16:18:35", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Snik-F", "name": { "family": "Snik", "given": "Frans" } }, { "id": "Otten-G", "name": { "family": "Otten", "given": "Gilles" } }, { "id": "Kenworthy-M", "name": { "family": "Kenworthy", "given": "Matthew" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Escuti-M", "name": { "family": "Escuti", "given": "Michael" } } ] }, "title": "Combining vector-phase coronagraphy with dual-beam polarimetry", "ispublished": "unpub", "full_text_status": "public", "keywords": "coronagraphy, polarimetry, vector phase, high-contrast imaging", "note": "\u00a9 2014 SPIE.\n\nPublished - 396362.pdf
", "abstract": "Utilizing the so-called vector phase of polarized light, both focal-plane coronagraphs (e.g. the Vector Vortex Coronagraph) and pupil-plane coronagraphs (e.g. the vector Apodizing Phase Plate) are powerful components for high-contrast imaging. These coronagraphs can be built and optimized with polarization techniques and liquid crystal technology, that enable patterning at the micron level and furnish broad-band performance. The contrast between the residual starlight and the (polarized) reflected light off exoplanets can be further bridged by incorporating sensitive, dual-beam imaging polarimetry. As vector-phase coronagraphs use polarizers to enhance their performance, we introduce optimally integrated solutions that combine advanced coronagraphy and polarimetry. For both the VVC and the vAPP we present polarization beam-splitting concepts, with polarization analyzers either behind or in front of the coronagraphic optics. We discuss design solutions for the implementation of polarization optics, and set the stage for a trade-off between the improvement of coronagraphic and polarimetric performance and the ensuing degradation on the high-contrast imaging performance due to wavefront errors.", "date": "2014-08-06", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 91477U", "id_number": "CaltechAUTHORS:20150519-145718105", "isbn": "9780819496157", "book_title": "Ground-based and Airborne Instrumentation for Astronomy V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150519-145718105", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Ramsay-S-K", "name": { "family": "Ramsay", "given": "Suzanne K." } }, { "id": "McLean-I-S", "name": { "family": "McLean", "given": "Ian S." } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2055452", "primary_object": { "basename": "396362.pdf", "url": "https://authors.library.caltech.edu/records/y744j-zk875/files/396362.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Snik, Frans; Otten, Gilles; et el." }, { "id": "https://authors.library.caltech.edu/records/bg2gt-qan09", "eprint_id": 57741, "eprint_status": "archive", "datestamp": "2023-08-20 02:03:02", "lastmod": "2024-01-13 16:19:19", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Kerber-F", "name": { "family": "Kerber", "given": "Florian" } }, { "id": "K\u00e4ufl-H-U", "name": { "family": "K\u00e4ufl", "given": "Hans U." } }, { "id": "Baksai-P", "name": { "family": "Baksai", "given": "Pedro" } }, { "id": "Di-Lieto-N", "name": { "family": "Di Lieto", "given": "Nicola" } }, { "id": "Dobrzycka-D", "name": { "family": "Dobrzycka", "given": "Danuta" } }, { "id": "Duhoux-P", "name": { "family": "Duhoux", "given": "Philippe" } }, { "id": "Finger-G", "name": { "family": "Finger", "given": "Gert" } }, { "id": "Heikamp-S", "name": { "family": "Heikamp", "given": "Stefanie" } }, { "id": "Ives-D", "name": { "family": "Ives", "given": "Derek" } }, { "id": "Gerd-J", "name": { "family": "Jakob", "given": "Gerd" } }, { "id": "Lundin-L", "name": { "family": "Lundin", "given": "Lars" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Mehrgan-L", "name": { "family": "Mehrgan", "given": "Leander" } }, { "id": "Momany-Y", "name": { "family": "Momany", "given": "Yazan" } }, { "id": "Moraeu-V", "name": { "family": "Moreau", "given": "Vincent" } }, { "id": "Pantin-E", "name": { "family": "Pantin", "given": "Eric" } }, { "id": "Riquelme-M", "name": { "family": "Riquelme", "given": "Miguel" } }, { "id": "Sandrock-S", "name": { "family": "Sandrock", "given": "Stefan" } }, { "id": "Siebenmorgen-R", "name": { "family": "Siebenmorgen", "given": "Ralf" } }, { "id": "Smette-A", "name": { "family": "Smette", "given": "Alain" } }, { "id": "Taylor-J", "name": { "family": "Taylor", "given": "Julian" } }, { "id": "van-den-Ancker-M", "name": { "family": "van den Ancker", "given": "Mario" } }, { "id": "Valdes-G", "name": { "family": "Valdes", "given": "Guillermo" } }, { "id": "Venema-L", "name": { "family": "Venema", "given": "Lars" } }, { "id": "Weilenmann-U", "name": { "family": "Weilenmann", "given": "Ueli" } } ] }, "title": "VISIR Upgrade Overview and Status", "ispublished": "unpub", "full_text_status": "public", "keywords": "VISIR, upgrade, ESO VLT, mid-IR, AQUARIUS, excess low frequency noise, chopping, water vapour", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). Paper published July 31, 2014.\n\nPublished - 396373.pdf
", "abstract": "We present an overview of the VISIR upgrade project. VISIR is the mid-infrared imager and spectrograph at ESO's VLT. The project team is comprised of ESO staff and members of the original VISIR consortium: CEA Saclay and ASTRON. The project plan is based on input from the ESO user community with the goal of enhancing the scientific performance and efficiency of VISIR by a combination of measures: installation of improved hardware, optimization of instrument operations and software support. The cornerstone of the upgrade is the 1k by 1k Si:As AQUARIUS detector array (Raytheon) which has been carefully characterized in ESO's IR detector test facility (modified TIMMI 2 instrument). A prism spectroscopic mode will cover the N-band in a single observation. New scientific capabilities for high resolution and high-contrast imaging will be offered by sub-aperture mask (SAM) and phase-mask coronagraphic (4QPM/AGPM) modes. In order to make optimal use of favourable atmospheric conditions a water vapour monitor has been deployed on Paranal, allowing for real-time decisions and the introduction of a user-defined constraint on water vapour. During the commissioning in 2012 it was found that the on-sky sensitivity of the AQUARIUS detector was significantly below expectations and that VISIR was not ready to go back to science operations. Extensive testing of the detector arrays in the laboratory and on-sky enabled us to diagnose the cause for the shortcoming of the detector as excess low frequency noise (ELFN). It is inherent to the design chosen for this detector and can't be remedied by changing the detector set-up. Since this is a form of correlated noise its impact can be limited by modulating the scene recorded by the detector. We have studied several mitigation options and found that faster chopping using the secondary mirror (M2) of the VLT offers the most promising way forward. Faster M2 chopping has been tested and is scheduled for implementation before the end of 2014 after which we plan to re-commission VISIR. In addition an upgrade of the IT infrastructure related to VISIR is planned in order to support burst-mode operations. The upgraded VISIR will be a powerful instrument providing close to background limited performance for diffraction-limited observations at an 8-m telescope. It will offer synergy with facilities such as ALMA, JWST, VLTI and SOFIA, while a wealth of targets is available from survey work (e.g. VISTA, WISE). In addition it will bring confirmation of the technical readiness and scientific value of several aspects of potential mid-IR instrumentation at Extremely Large Telescopes.", "date": "2014-07-31", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 91470C", "id_number": "CaltechAUTHORS:20150521-122919960", "isbn": "9780819496157", "book_title": "Ground-based and Airborne Instrumentation for Astronomy V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-122919960", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Ramsay-S-K", "name": { "family": "Ramsay", "given": "Suzanne K." } }, { "id": "McLean-I-S", "name": { "family": "McLean", "given": "Ian S." } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2055172", "primary_object": { "basename": "396373.pdf", "url": "https://authors.library.caltech.edu/records/bg2gt-qan09/files/396373.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Kerber, Florian; K\u00e4ufl, Hans U.; et el." }, { "id": "https://authors.library.caltech.edu/records/h5zar-q3847", "eprint_id": 57736, "eprint_status": "archive", "datestamp": "2023-08-20 01:53:51", "lastmod": "2024-01-13 16:19:09", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Jolivet-A", "name": { "family": "Jolivet", "given": "A." } }, { "id": "Piron-P", "name": { "family": "Piron", "given": "P." } }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "E." } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "C." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } } ] }, "title": "The VORTEX coronagraphic test bench", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). Date Published: 18 July 2014.\n\nThe research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement n.337569) and from the French Community of Belgium through an ARC grant for Concerted Research Actions.\n\nPublished - 396368.pdf
", "abstract": "In this paper, we present the infrared coronagraphic test bench of the University of Li\u00e8ge named VODCA (Vortex Optical Demonstrator for Coronagraphic Applications). The goal of the bench is to assess the performances of the Annular Groove Phase Masks (AGPMs) at near- to mid-infrared wavelengths. The AGPM is a subwavelength grating vortex coronagraph of charge two (SGVC2) made out of diamond. The bench is designed to be completely achromatic and will be composed of a super continuum laser source emitting in the near to mid-infrared, several parabolas, diaphragms and an infrared camera. This way, we will be able to test the different AGPMs in the M, L, K and H bands. Eventually, the bench will also allow the computation of the incident wavefront aberrations on the coronagraph. A reflective Lyot stop will send most of the stellar light to a second camera to perform low-order wavefront sensing. This second system coupled with a deformable mirror will allow the correction of the wavefront aberrations. We also aim to test other pre- and/or post-coronagraphic concepts such as optimal apodization.", "date": "2014-07-18", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 91515P", "id_number": "CaltechAUTHORS:20150521-101318318", "isbn": "9780819496195", "book_title": "Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-101318318", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" } ] }, "contributors": { "items": [ { "id": "Navarro-R", "name": { "family": "Navarro", "given": "Ram\u03ccn" } }, { "id": "Cunningham-C-R", "name": { "family": "Cunningham", "given": "Colin R." } }, { "id": "Barto-A-A", "name": { "family": "Barto", "given": "Allison A." } } ] }, "doi": "10.1117/12.2055791", "primary_object": { "basename": "396368.pdf", "url": "https://authors.library.caltech.edu/records/h5zar-q3847/files/396368.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Jolivet, A.; Piron, P.; et el." }, { "id": "https://authors.library.caltech.edu/records/8ce7k-1e107", "eprint_id": 57684, "eprint_status": "archive", "datestamp": "2023-08-20 01:48:31", "lastmod": "2024-01-13 16:18:47", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "Christian" } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Carlomagno-B", "name": { "family": "Carlomagno", "given": "Brunella" } }, { "id": "Piron-P", "name": { "family": "Piron", "given": "Pierre" } }, { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "Pontus" } }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "Mikael" }, "orcid": "0000-0002-2011-0851" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "Serge" } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" } ] }, "title": "Development of a subwavelength grating vortex coronagraph of topological charge 4 (SGVC4)", "ispublished": "unpub", "full_text_status": "public", "keywords": "extrasolar planet, vector vortex coronagraphy, phase mask, subwavelength grating, high contrast imaging, small inner working angle", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement n.337569) and from the French Community of Belgium through an ARC grant for Concerted Research Actions.\n\nPublished - 396361.pdf
Submitted - 1412.0384.pdf
", "abstract": "One possible solution to achieve high contrast direct imaging at a small inner working angle (IWA) is to use a vector vortex coronagraph (VVC), which provides a continuous helical phase ramp in the focal plane of the telescope with a phase singularity in its center. Such an optical vortex is characterized by its topological charge, i.e., the number of times the phase accumulates 2\u03c0 radians along a closed path surrounding the singularity. Over the past few years, we have been developing a charge-2 VVC induced by rotationally symmetric subwavelength gratings (SGVC2), also known as the Annular Groove Phase Mask (AGPM). Since 2013, several SGVC2s (or AGPMs) were manufactured using synthetic diamond substrate, then validated on dedicated optical benches, and installed on 10-m class telescopes. Increasing the topological charge seems however mandatory for cancelling the light of bright stars which will be partially resolved by future Extremely Large Telescopes in the near-infrared. In this paper, we first detail our motivations for developing an SGVC4 (charge 4) dedicated to the near-infrared domain. The challenge lies in the design of the pattern which is unrealistic in the theoretically perfect case, due to state-of-the-art manufacturing limitations. Hence, we propose a new realistic design of SGVC4 with minimized discontinuities and optimized phase ramp, showing conclusive improvements over previous works in this field. A preliminary validation of our concept is given based on RCWA simulations, while full 3D finite-difference time-domain simulations (and eventually laboratory tests) will be required for a final validation.", "date": "2014-07-08", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 91478Y", "id_number": "CaltechAUTHORS:20150520-081847128", "isbn": "9780819496157", "book_title": "Ground-based and Airborne Instrumentation for Astronomy V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-081847128", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es \u2013 Acad\u00e9mie universitaire Wallonie-Europe" } ] }, "contributors": { "items": [ { "id": "Ramsay-S-K", "name": { "family": "Ramsay", "given": "Suzanne K." } }, { "id": "McLean-I-S", "name": { "family": "McLean", "given": "Ian S." } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2055798", "primary_object": { "basename": "1412.0384.pdf", "url": "https://authors.library.caltech.edu/records/8ce7k-1e107/files/1412.0384.pdf" }, "related_objects": [ { "basename": "396361.pdf", "url": "https://authors.library.caltech.edu/records/8ce7k-1e107/files/396361.pdf" } ], "resource_type": "book_section", "pub_year": "2014", "author_list": "Delacroix, Christian; Absil, Olivier; et el." }, { "id": "https://authors.library.caltech.edu/records/pb04k-m9v93", "eprint_id": 57723, "eprint_status": "archive", "datestamp": "2023-08-20 01:30:48", "lastmod": "2024-01-13 16:19:01", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Fogarty-Kevin", "name": { "family": "Fogarty", "given": "Kevin" }, "orcid": "0000-0002-2691-2476" }, { "id": "Pueyo-Laurent", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Optimal apodizations for on-axis vector vortex coronagraphs", "ispublished": "unpub", "full_text_status": "public", "keywords": "Vector Vortex Coronagraph, On-Axis Telescopes, PIAA, Earthlike Exoplanet Imaging", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). August 2, 2014.\n\nThis work was carried out in part for the Fourier Optics course (AS.171.755), and I am grateful for the guidance of course instructors Ron Allen and Anand Sivaramakrishnan. This material is also partially based upon work carried out under subcontract 1496556 with the Jet Propulsion Laboratory funded by NASA and administered by the California Institute of Technology.\n\nPublished - 396366.pdf
", "abstract": "Imaging planets requires instruments capable of dealing with extreme contrast ratios and that have a high resolution. Coronagraphs that can reach a contrast ratio in a neighborhood of 10^9 will be capable of observing Jupiter-like planets, while those with a contrast greater than a benchmark number of 10^(10) to within a few \u03bb/D of an on-axis star will render possible imaging of Earth-like planets. Plans for achieving this feat have been developed for use on telescopes with unobscured, circularly symmetric apertures. However; given that the next generation of large telescopes are on-axis designs with support structures in the telescope aperture and a central obstruction due to the secondary mirror, it has proven necessary to develop coronagraphic techniques that compensate for obstructions. Pueyo and Norman (2012) present a possible solution to the problem of the support structures using ACAD. In this paper, we present a coronagraphic design that uses a vector vortex and pupil apodization to compensate for the secondary mirror that could possibly be used in conjunction with a wavefront control system and/or ACAD. This coronagraph is capable of achieving a contrast ratio of at least 10^(10) in a working angle of (1:5 - 30) \u03bb/D in conjunction with an on-axis telescope. We can construct our pupil using a classical transmissive apodizer or pupil remapping. We find that the mirror shapes required are relatively simple (requiring \u2264 40 degrees of freedom to describe) and we expect they will be feasible to manufacture, and potentially even to implement with deformable mirrors. By combining existing high-contrast imaging techniques, we demonstrate that a relatively simple design may be used to image exo-Earths.", "date": "2014-06-22", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "id_number": "CaltechAUTHORS:20150520-151205215", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-151205215", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fourier Optics course (AS.171.755)" }, { "agency": "NASA/JPL", "grant_number": "1496556" } ] }, "contributors": { "items": [ { "id": "Oschmann-Jacobus-M", "name": { "family": "Oschmann", "given": "Jacobus M., Jr." } }, { "id": "Clampin-Mark-C", "name": { "family": "Clampin", "given": "Mark" } }, { "id": "Fazio-Giovanni-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "MacEwen-Howard-A", "name": { "family": "MacEwen", "given": "Howard A." } } ] }, "doi": "10.1117/12.2056760", "primary_object": { "basename": "396366.pdf", "url": "https://authors.library.caltech.edu/records/pb04k-m9v93/files/396366.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Fogarty, Kevin; Pueyo, Laurent; et el." }, { "id": "https://authors.library.caltech.edu/records/dag3p-8t273", "eprint_id": 87178, "eprint_status": "archive", "datestamp": "2023-08-20 01:00:15", "lastmod": "2023-10-18 20:55:29", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Snik-F", "name": { "family": "Snik", "given": "Frans" } }, { "id": "Craven-Jones-J", "name": { "family": "Craven-Jones", "given": "Julia" } }, { "id": "Escuti-M", "name": { "family": "Escuti", "given": "Michael" } }, { "id": "Fineschi-S", "name": { "family": "Fineschi", "given": "Silvano" } }, { "id": "Harrington-D", "name": { "family": "Harrington", "given": "David" } }, { "id": "De-Martino-A", "name": { "family": "De Martino", "given": "Antonello" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Riedi-J", "name": { "family": "Riedi", "given": "J\u00e9r\u00f4me" } }, { "id": "Tyo-J-S", "name": { "family": "Tyo", "given": "J. Scott" } } ] }, "title": "An overview of polarimetric sensing techniques and technology with applications to different research fields", "ispublished": "unpub", "full_text_status": "public", "keywords": "polarimetry", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe authors thank all the participants for their invaluable contributions to the workshop and to this publication. We thank the Lorentz Center and its staff for providing the ideal platform for our workshop, and for funding. We we thank the COST network MP1104 \"Polarisation as a tool to study the solar system and beyond\" for funding and for the initial ideas for organizing this multidisciplinary workshop.\n\nPublished - 90990B.pdf
", "abstract": "We report the main conclusions from an interactive, multidisciplinary workshop on \"Polarimetric Techniques and Technology\", held on March 24-28 2014 at the Lorentz Center in Leiden, the Netherlands. The work- shop brought together polarimetrists from different research fields. Participants had backgrounds ranging from academia to industrial RD. Here we provide an overview of polarimetric instrumentation in the optical regime geared towards a wide range of applications: atmospheric remote sensing, target detection, astronomy, biomedical applications, etc. We identify common approaches and challenges. We list novel polarimetric techniques and polarization technologies that enable promising new solutions. We conclude with recommendations to the polarimetric community at large on joint efforts for exchanging expertise.", "date": "2014-05-21", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 90990B", "id_number": "CaltechAUTHORS:20180615-164656884", "isbn": "9781628410365", "book_title": "Polarization: Measurement, Analysis, and Remote Sensing XI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180615-164656884", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "COST", "grant_number": "MP1104" } ] }, "contributors": { "items": [ { "id": "Chenault-D-B", "name": { "family": "Chenault", "given": "David B." } }, { "id": "Goldstein-D-H", "name": { "family": "Goldstein", "given": "Dennis H." } } ] }, "doi": "10.1117/12.2053245", "primary_object": { "basename": "90990B.pdf", "url": "https://authors.library.caltech.edu/records/dag3p-8t273/files/90990B.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Snik, Frans; Craven-Jones, Julia; et el." }, { "id": "https://authors.library.caltech.edu/records/nt0kh-jtg26", "eprint_id": 87197, "eprint_status": "archive", "datestamp": "2023-08-20 01:00:20", "lastmod": "2024-01-14 20:15:25", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Piron-Pierre", "name": { "family": "Piron", "given": "P." } }, { "id": "Blain-Pascal", "name": { "family": "Blain", "given": "P." } }, { "id": "D\u00e9cultot-Marc", "name": { "family": "D\u00e9cultot", "given": "M." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } } ] }, "title": "First prototypes of vortex retarders obtained by polarization holography", "ispublished": "unpub", "full_text_status": "public", "keywords": "Polarization, Holography, Liquid Crystal Polymers, Vectorial vortex", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe author was funded by the \" Fond pour la formation \u00e0 la Recherche dans l'Industrie et l'Agriculture\" (FRIA). The author would like to thanks Lo\u00efc Lichawski for his help during his work.\n\nPublished - 909911.pdf
", "abstract": "This paper will present the first prototypes of vortex retarders made of photo-orientable liquid crystals polymers recorded without mechanical action using only polarization holography. Vortex retarders are birefringent plates characterized by a uniform phase retard and a rotation of their fast axis along their center. Liquid crystals are anisotropic molecules possessing birefringent properties. They are locally orientable and their orientation defines the fast axis orientation of the retarder. Their alignment depends on the local orientation of the recording electric field. The superimposition of several polarized beams will be used to shape the electric field to achieve the recording of vortex retarders. The mathematical aspects of the superimposition process, as well as several numerical simulations are exposed. Finally, the first prototypes are presented, characterized and compared to the numerical simulations.", "date": "2014-05-21", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 909911", "id_number": "CaltechAUTHORS:20180618-141806560", "isbn": "9781628410365", "book_title": "Polarization: Measurement, Analysis, and Remote Sensing XI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180618-141806560", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fonds pour la Formation \u00e0 la Recherche dans l'\u00edndustrie et dans l'\u00c1griculture (FRIA-Belgium)" } ] }, "contributors": { "items": [ { "id": "Chenault-D-B", "name": { "family": "Chenault", "given": "David B." } }, { "id": "Goldstein-D-H", "name": { "family": "Goldstein", "given": "Dennis H." } } ] }, "doi": "10.1117/12.2052830", "primary_object": { "basename": "909911.pdf", "url": "https://authors.library.caltech.edu/records/nt0kh-jtg26/files/909911.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Piron, P.; Blain, P.; et el." }, { "id": "https://authors.library.caltech.edu/records/mm2j9-58y97", "eprint_id": 57885, "eprint_status": "archive", "datestamp": "2023-08-20 00:29:41", "lastmod": "2024-01-13 16:20:56", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "Anthony" }, "orcid": "0000-0001-9353-2724" }, { "id": "Maire-A-L", "name": { "family": "Maire", "given": "Anne-Lise" }, "orcid": "0000-0002-2591-4138" }, { "id": "Galicher-R", "name": { "family": "Galicher", "given": "Rapha\u00ebl" } }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "Pierre" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John" } }, { "id": "Schneider-J", "name": { "family": "Schneider", "given": "Jean" } }, { "id": "Traub-W-A", "name": { "family": "Traub", "given": "Wes" } }, { "id": "Stam-D-M", "name": { "family": "Stam", "given": "Daphne" } }, { "id": "Lagage-P-O", "name": { "family": "Lagage", "given": "Pierre-Olivier" } }, { "id": "Gratton-R", "name": { "family": "Gratton", "given": "Raffaele" } } ] }, "title": "SPICES: A Mission Concept to Characterize Long Period Planets from Giants to Super-Earths", "ispublished": "unpub", "full_text_status": "public", "keywords": "instrumentation: high angular resolution, planetary systems", "note": "\u00a9 2014 International Astronomical Union.\n\nPublished - S1743921313013331a.pdf
", "abstract": "SPICES (Spectro-Polarimetric Imaging and Characterization of Exoplanetary Systems) was proposed in 2010 for a five-year M-class mission in the context of ESA Cosmic Vision. Its purpose is to image and characterize long-period extrasolar planets located at several AUs (0.5-10 AU) from nearby stars (<25 pc) with masses ranging from a few Jupiter masses down to super-Earths (~2 Earth radii, ~10 M\u2295), possibly habitable. In addition, circumstellar disks as faint as a few times the zodiacal light in the Solar System can be studied. SPICES is based on a 1.5-m off-axis telescope and can perform spectro-polarimetric measurements in the visible (450 - 900 nm) at a spectral resolution of about 40. This paper summarizes the top science program and the choices made to conceive the instrument. The performance is illustrated for a few emblematic cases.", "date": "2014-04-29", "date_type": "published", "publisher": "Cambridge University Press", "place_of_pub": "New York, NY", "pagerange": "429-434", "id_number": "CaltechAUTHORS:20150528-145630181", "isbn": "9781107033825", "book_title": "Formation, Detection, and Characterization of Extrasolar Habitable Planets", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150528-145630181", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Haghighipou-N", "name": { "family": "Haghighipou", "given": "N." } } ] }, "corp_creators": { "items": [ "SPICES team" ] }, "doi": "10.1017/S1743921313013331", "primary_object": { "basename": "S1743921313013331a.pdf", "url": "https://authors.library.caltech.edu/records/mm2j9-58y97/files/S1743921313013331a.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Boccaletti, Anthony; Maire, Anne-Lise; et el." }, { "id": "https://authors.library.caltech.edu/records/drcw8-1yw69", "eprint_id": 57892, "eprint_status": "archive", "datestamp": "2023-08-19 23:01:57", "lastmod": "2024-01-13 16:20:59", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Milli-J", "name": { "family": "Milli", "given": "J." }, "orcid": "0000-0001-9325-2511" }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "P." } }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "A." }, "orcid": "0000-0001-9353-2724" }, { "id": "Chauvin-G", "name": { "family": "Chauvin", "given": "G." } }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "C." } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "J. H." }, "orcid": "0000-0001-8627-0404" }, { "id": "Lagrange-A-M", "name": { "family": "Lagrange", "given": "A. M." } }, { "id": "O'Neal-J", "name": { "family": "O'Neal", "given": "J." } }, { "id": "Bourget-P", "name": { "family": "Bourget", "given": "P." } }, { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "P." } }, { "id": "Gonte-F-Y-J", "name": { "family": "Gonte", "given": "F." } }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } }, { "id": "Hanot-C", "name": { "family": "Hanot", "given": "C." } }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "M." }, "orcid": "0000-0002-2011-0851" }, { "id": "Kasper-M", "name": { "family": "Kasper", "given": "M." } }, { "id": "Lizon-J-L", "name": { "family": "Lizon", "given": "J.-L." } }, { "id": "Muzic-K", "name": { "family": "Muzic", "given": "K." } }, { "id": "Olivier-R", "name": { "family": "Olivier", "given": "R." } }, { "id": "Pe\u00f1a-E", "name": { "family": "Pe\u00f1a", "given": "E." } }, { "id": "Slusarenko-N", "name": { "family": "Slusarenko", "given": "N." } }, { "id": "Tacconi-Garman-L-E", "name": { "family": "Tacconi-Garman", "given": "L. E." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" } ] }, "title": "Companion search around \u03b2 Pictoris with the newly commissioned L'-band vector vortex coronagraph on VLT/NACO", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, vortex coronagraphy, \u03b2 Pictoris b", "note": "\u00a9 2013 International Astronomical Union.\n\nPublished - S1743921313007825a.pdf
", "abstract": "Here we present the installation and successful commissioning of an L'-band Annular Groove Phase Mask (AGPM) coronagraph on VLT/NACO. The AGPM is a vector vortex coronagraph made from diamond subwavelength gratings tuned to the L' band. The vector vortex coronagraph enables high contrast imaging at very small inner working angle (here 0''.09, the diffraction limit of the VLT at L'), potentially being the key to a new parameter space. During technical and science verification runs, we discovered a late-type companion at two beamwidths from an F0V star (Mawet et al. 2013), and imaged the inner regions of beta Pictoris down to the previously unexplored projected radius of 1.75 AU. The circumstellar disk was also resolved from ~= 1\" to 5\" (see J. Milli et al., these proceedings). These results showcase the potential of the NACO L-band AGPM over a wide range of spatial scales.", "date": "2014-01-06", "date_type": "published", "publisher": "Cambridge University Press", "place_of_pub": "New York, NY", "pagerange": "50-51", "id_number": "CaltechAUTHORS:20150529-071530204", "isbn": "9781107045200", "book_title": "Exploring the Formation and Evolution of Planetary Systems", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150529-071530204", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Booth-M", "name": { "family": "Booth", "given": "M." } }, { "id": "Matthews-B-C", "name": { "family": "Matthews", "given": "B. C." } }, { "id": "Graham-J-R", "name": { "family": "Graham", "given": "J. R." } } ] }, "doi": "10.1017/S1743921313007825", "primary_object": { "basename": "S1743921313007825a.pdf", "url": "https://authors.library.caltech.edu/records/drcw8-1yw69/files/S1743921313007825a.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Mawet, D.; Absil, O.; et el." }, { "id": "https://authors.library.caltech.edu/records/mznwy-w1k62", "eprint_id": 57883, "eprint_status": "archive", "datestamp": "2023-08-19 23:01:53", "lastmod": "2024-01-13 16:20:54", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wahl-M", "name": { "family": "Wahl", "given": "Matthew" } }, { "id": "Metchev-S-A", "name": { "family": "Metchev", "given": "Stanimir" }, "orcid": "0000-0003-3050-8203" }, { "id": "Patel-R-I", "name": { "family": "Patel", "given": "Rahul" }, "orcid": "0000-0002-5025-6827" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Dekany-R-G", "name": { "family": "Dekany", "given": "Richard" } }, { "id": "Roberts-J-E", "name": { "family": "Roberts", "given": "Jennifer" } }, { "id": "Burruss-R", "name": { "family": "Burruss", "given": "Rick" } }, { "id": "Bouchez-A-H", "name": { "family": "Bouchez", "given": "Antonin" } }, { "id": "Truong-Tuan", "name": { "family": "Truong", "given": "Tuan" } }, { "id": "Baranec-C", "name": { "family": "Baranec", "given": "Christoph" }, "orcid": "0000-0002-1917-9157" }, { "id": "Guiwitz-W", "name": { "family": "Guiwitz", "given": "Stephen" } }, { "id": "Hale-D", "name": { "family": "Hale", "given": "David" } }, { "id": "Angione-J", "name": { "family": "Angione", "given": "John" } }, { "id": "Trinh-Thang", "name": { "family": "Trinh", "given": "Thang" } }, { "id": "Zolkower-J", "name": { "family": "Zolkower", "given": "Jeffry" } }, { "id": "Croner-E-E", "name": { "family": "Croner", "given": "Ernest" } }, { "id": "Troy-M", "name": { "family": "Troy", "given": "Mitchell" } }, { "id": "McKenna-D", "name": { "family": "McKenna", "given": "Dan" } }, { "id": "Tesch-J-A", "name": { "family": "Tesch", "given": "Jonathan" } } ] }, "title": "Debris Disk Science with the Palomar ExAO System : First Results", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2013 International Astronomical Union.\n\nPublished - S174392131300793Xa.pdf
", "abstract": "We present first imaging results from the PALM-3000 adaptive optics system and\nPHARO camera on the Hale 5 m telescope. Observations using a vector vortex coronagraph have\ngiven us direct detections of the two-ring dusty debris system around the star HD 141569. Our\nobservations reveal the inner clearing in the disk to unprecedentedly small angular separations,\nand are the most sensitive yet at the H and K bands. We are for the first time able to measure\nand compare the colors of the scattered light in the inner and outer dust rings, and find that\nthe outer ring is significantly bluer than the inner ring.", "date": "2014-01-06", "date_type": "published", "publisher": "Cambridge University Press", "place_of_pub": "New York, NY", "pagerange": "72-73", "id_number": "CaltechAUTHORS:20150528-144033986", "isbn": "9781107045200", "book_title": "Exploring the Formation and Evolution of Planetary Systems", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150528-144033986", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Booth-M", "name": { "family": "Booth", "given": "M." } }, { "id": "Matthews-B-C", "name": { "family": "Matthews", "given": "B. C." } }, { "id": "Graham-J-R", "name": { "family": "Graham", "given": "J. R." } } ] }, "doi": "10.1017/S174392131300793X", "primary_object": { "basename": "S174392131300793Xa.pdf", "url": "https://authors.library.caltech.edu/records/mznwy-w1k62/files/S174392131300793Xa.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Wahl, Matthew; Metchev, Stanimir; et el." }, { "id": "https://authors.library.caltech.edu/records/abjks-ga007", "eprint_id": 57893, "eprint_status": "archive", "datestamp": "2023-08-19 23:02:02", "lastmod": "2024-01-13 16:21:01", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Milli-J", "name": { "family": "Milli", "given": "Julien" }, "orcid": "0000-0001-9325-2511" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Lagrange-A-M", "name": { "family": "Lagrange", "given": "Anne Marie" } }, { "id": "Mouillet-D", "name": { "family": "Mouillet", "given": "David" } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien H." }, "orcid": "0000-0001-8627-0404" }, { "id": "Augereau-J-C", "name": { "family": "Augereau", "given": "Jean-Charles" } } ] }, "title": "First High-Angular Resolution L' Images of the \u03b2 Pictoris Debris Disc with the VLT/NaCo", "ispublished": "unpub", "full_text_status": "public", "keywords": "stars: individual (\u03b2 Pictoris), techniques: high angular resolution, techniques: image\nprocessing", "note": "\u00a9 2013 International Astronomical Union. Published online: 06 January 2014.\n\nPublished - S1743921313008909a.pdf
", "abstract": "Imaging debris discs in the L\u2032-band (3.8 \u03bcm) is a difficult task. Quasi-static speckles from imperfect optics prevail below 1\u2033 whereas background emission is the dominant noise source beyond that separation and is much larger than at shorter wavelengths. We demonstrate here the potential of the newly commissioned AGPM coronograph on VLT/NaCo combined with advanced star and sky subtraction technique based on Principal Component Analysis, and we analyze the morphology of the \u03b2 Pictoris disc.", "date": "2014-01-06", "date_type": "published", "publisher": "Cambridge University Press", "place_of_pub": "New York, NY", "pagerange": "350-351", "id_number": "CaltechAUTHORS:20150529-074952558", "isbn": "9781107045200", "book_title": "Exploring the Formation and Evolution of Planetary Systems", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150529-074952558", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Booth-M", "name": { "family": "Booth", "given": "M." } }, { "id": "Matthews-B-C", "name": { "family": "Matthews", "given": "B. C." } }, { "id": "Graham-J-R", "name": { "family": "Graham", "given": "J. R." } } ] }, "doi": "10.1017/S1743921313008909", "primary_object": { "basename": "S1743921313008909a.pdf", "url": "https://authors.library.caltech.edu/records/abjks-ga007/files/S1743921313008909a.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Milli, Julien; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.edu/records/asqm2-m2f85", "eprint_id": 57705, "eprint_status": "archive", "datestamp": "2023-08-19 22:47:05", "lastmod": "2024-01-13 16:18:53", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "id": "Pueyo-Laurent", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Hagan-J-Brendan", "name": { "family": "Hagan", "given": "J. Brendan" } }, { "id": "Gofas-Salas-Elena", "name": { "family": "Gofas-Salas", "given": "Elena" } }, { "id": "Rajan-Abhijith", "name": { "family": "Rajan", "given": "Abhijith" } }, { "id": "Chen-Christine", "name": { "family": "Chen", "given": "Christine" } }, { "id": "Perrin-Marshall-D", "name": { "family": "Perrin", "given": "Marshall D." }, "orcid": "0000-0002-3191-8151" }, { "id": "Debes-John-H", "name": { "family": "Debes", "given": "John" }, "orcid": "0000-0002-1783-8817" }, { "id": "Golimowski-David-A", "name": { "family": "Golimowski", "given": "David" } }, { "id": "Hines-Dean-C", "name": { "family": "Hines", "given": "Dean C." }, "orcid": "0000-0003-4653-6161" }, { "id": "N'Diaye-Mamadou", "name": { "family": "N'Diaye", "given": "Mamadou" }, "orcid": "0000-0002-1721-3294" }, { "id": "Schneider-Glenn", "name": { "family": "Schneider", "given": "Glenn" }, "orcid": "0000-0002-4511-5966" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Marois-Christian", "name": { "family": "Marois", "given": "Christian" }, "orcid": "0000-0002-4164-4182" }, { "id": "Soummer-R\u00e9mi", "name": { "family": "Soummer", "given": "R\u00e9mi" }, "orcid": "0000-0003-2753-2819" } ] }, "title": "Archival Legacy Investigations of Circumstellar Environments: Overview and First Results", "ispublished": "unpub", "full_text_status": "public", "keywords": "HST, NICMOS, Coronagraphy, Post-processing, debris disks, exoplanets", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). Date Published: 4 September 2014.\n\nThis project was made possible by the Mikulski Archive for Space Telescopes (MAST) at STScI. Support was provided by NASA through grants HST-AR-12652.01 (PI: R. Soummer), HST-GO-11136.09-A (PI: D. Golimowski), and by STScI Director's Discretionary Research funds, from STScI, which is operated by AURA under NASA contract NAS5- 26555. The input images to ALICE processing are from the recalibrated NICMOS data products produced by the Legacy Archive project, \"A Legacy Archive PSF Library And Circumstellar Environments (LAPLACE) Investigation,\" (HST-AR- 11279, PI: G. Schneider). Pueyo was supported in part under contract with the California Institute of Technology (Caltech) funded by NASA through the Sagan Fellowship Program\nexecuted by the NASA Exoplanet Science Institute. This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France.\n\nPublished - 396363.pdf
Submitted - 1407.0617v1.pdf
", "abstract": "We are currently conducting a comprehensive and consistent re-processing of archival HST-NICMOS coronagraphic surveys using advanced PSF subtraction methods, entitled the Archival Legacy Investigations of Circumstellar Environments program (ALICE, HST/AR 12652). This virtual campaign of about 400 targets has already produced numerous new detections of previously unidentified point sources and circumstellar structures. We present five newly spatially resolved debris disks revealed in scattered light by our analysis of the archival data. These images provide new views of material around young solar-type stars at ages corresponding to the period of terrestrial planet formation in our solar system. We have also detected several new candidate substellar companions, for which there are ongoing followup campaigns (HST/WFC3 and VLT/SINFONI in ADI mode). Since the methods developed as part of ALICE are directly applicable to future missions (JWST, AFTA coronagraph) we emphasize the importance of devising optimal PSF subtraction methods for upcoming coronagraphic imaging missions. We describe efforts in defining direct imaging high-level science products (HLSP) standards that can be applicable to other coronagraphic campaigns, including ground-based (e.g., Gemini Planet Imager), and future space instruments (e.g., JWST). ALICE will deliver a first release of HLSPs to the community through the MAST archive at STScI in 2014.", "date": "2014", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 914357", "id_number": "CaltechAUTHORS:20150520-104945736", "isbn": "9780819496119", "book_title": "Space telescopes and instrumentation 2014 : optical, infrared and millimeter wave : 22-27 June 2014, Montreal, Canada", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-104945736", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "HST-AR-12652.01" }, { "agency": "NASA", "grant_number": "HST-GO-11136.09-A" }, { "agency": "NASA", "grant_number": "NAS5- 26555" }, { "agency": "NASA Sagan Fellowship Program" } ] }, "contributors": { "items": [ { "id": "Oschmann-Jacobus-M", "name": { "family": "Oschmann", "given": "Jacobus M., Jr." } }, { "id": "Clampin-Mark-C", "name": { "family": "Clampin", "given": "Mark" } }, { "id": "Fazio-Giovanni-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "MacEwen-Howard-A", "name": { "family": "MacEwen", "given": "Howard A." } } ] }, "doi": "10.1117/12.2056672", "primary_object": { "basename": "1407.0617v1.pdf", "url": "https://authors.library.caltech.edu/records/asqm2-m2f85/files/1407.0617v1.pdf" }, "related_objects": [ { "basename": "396363.pdf", "url": "https://authors.library.caltech.edu/records/asqm2-m2f85/files/396363.pdf" } ], "resource_type": "book_section", "pub_year": "2014", "author_list": "Choquet, \u00c9lodie; Pueyo, Laurent; et el." }, { "id": "https://authors.library.caltech.edu/records/5v3qn-hbh93", "eprint_id": 57895, "eprint_status": "archive", "datestamp": "2023-08-19 22:47:10", "lastmod": "2023-10-23 17:51:17", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Kasper-M", "name": { "family": "Kasper", "given": "Marcus" } }, { "id": "Verinaud-C", "name": { "family": "Verinaud", "given": "Christophe" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Roadmap for PCS, the Planetary Camera and Spectrograph for the E-ELT", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2014.\n\nPublished - fulltext_12804.pdf
", "abstract": "Presently, dedicated instruments at large telescopes (SPHERE for the VLT, GPI for Gemini) are\nabout to discover and explore self-luminous giant planets by direct imaging and spectroscopy. The next\ngeneration of 30m-40m ground-based telescopes, the Extremely Large Telescopes, have the potential to\ndramatically enlarge the discovery space towards older giant planets seen in reflected light and ultimately even a\nsmall number of rocky planets. The E-ELT Planetary Camera and Spectrograph (PCS) serves this purpose.\nBuilding on the heritage of the EPICS phase-A study, this paper presents revised requirements, a possible\nconcept, and the R&D necessary to realize the instrument.", "date": "2014", "date_type": "published", "publisher": "Red Hook, NY", "place_of_pub": "New York, NY", "id_number": "CaltechAUTHORS:20150529-094224991", "isbn": "978-88-908876-0-4", "book_title": "Adaptive Optics for Extremely Large Telescopes", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150529-094224991", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Esposito-S", "name": { "family": "Esposito", "given": "Simone" } }, { "id": "Luca-F", "name": { "family": "Luca", "given": "Fini" } } ] }, "doi": "10.12839/AO4ELT3.12804", "primary_object": { "basename": "fulltext_12804.pdf", "url": "https://authors.library.caltech.edu/records/5v3qn-hbh93/files/fulltext_12804.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Kasper, Marcus; Verinaud, Christophe; et el." }, { "id": "https://authors.library.caltech.edu/records/5dbap-0gw79", "eprint_id": 87200, "eprint_status": "archive", "datestamp": "2023-08-19 21:32:35", "lastmod": "2024-01-14 20:15:33", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Bourget-P", "name": { "family": "Bourget", "given": "P." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Mardones-P", "name": { "family": "Mardones", "given": "P." } }, { "id": "Schuhler-N", "name": { "family": "Schuhler", "given": "N." } }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "L." }, "orcid": "0000-0003-3818-408X" }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "J." }, "orcid": "0000-0001-8627-0404" }, { "id": "Haguenauer-P", "name": { "family": "Haguenauer", "given": "P." } }, { "id": "Gonte-F-Y-J", "name": { "family": "Gonte", "given": "F." } } ] }, "title": "Adaptive phase-mask coronagraph with amplitude and phase modulation for high dynamic range synchronous detection: APM^2 coronagraph", "ispublished": "unpub", "full_text_status": "public", "keywords": "High-contrast imaging, coronagraphy, polarization, high angular resolution, phase mask, adaptive optics, synchronous detection", "note": "\u00a9 2013 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was carried out at the European Southern Observatory (ESO) site of Vitacura (Santiago, Chile).\n\nPublished - 88640J.pdf
", "abstract": "We present a new Adaptive Phase Mask (APM) coronagraph design enabling Amplitude and Phase Modulation control (APM). The Adaptive Phase mask coronagraph is a technique proposed to provide both high dynamic and high angular resolution imaging of faint sources around bright objects. Discriminating faint sources from static speckles is a challenging problem. Our new system is based on synchronous demodulation that allows high dynamic range detection of a faint target immersed in a background. The APM^2 uses the coherence of speckles to discriminate them from proper companions, using the mask itself as the electric field modulator. Synchronous detection in the radio frequency range is used to side-step the effect of atmospheric turbulence and enable the detection of low amplitude signals. The APM^2 concept offers high dynamic range detection and provides a time- and cost-effective method to quantify the probability of presence of a faint object close to the central star.", "date": "2013-09-26", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 88640J", "id_number": "CaltechAUTHORS:20180618-144401710", "isbn": "9780819497147", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180618-144401710", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2026211", "primary_object": { "basename": "88640J.pdf", "url": "https://authors.library.caltech.edu/records/5dbap-0gw79/files/88640J.pdf" }, "resource_type": "book_section", "pub_year": "2013", "author_list": "Bourget, P.; Mawet, D.; et el." }, { "id": "https://authors.library.caltech.edu/records/v8g6g-5cm94", "eprint_id": 57743, "eprint_status": "archive", "datestamp": "2023-08-19 21:32:20", "lastmod": "2024-01-13 16:19:21", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "N'Diaye-M", "name": { "family": "N'Diaye", "given": "Mamadou" }, "orcid": "0000-0002-1721-3294" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Elliot-E", "name": { "family": "Elliot", "given": "Erin" } }, { "id": "Perrin-M-D", "name": { "family": "Perrin", "given": "Marshall D." }, "orcid": "0000-0002-3191-8151" }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. Kent" } }, { "id": "Groff-T-D", "name": { "family": "Groff", "given": "Tyler" }, "orcid": "0000-0001-5978-3247" }, { "id": "Carlotti-A", "name": { "family": "Carlotti", "given": "Alexis" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Sheckells-M", "name": { "family": "Sheckells", "given": "Matt" } }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } }, { "id": "Macintosh-B-A", "name": { "family": "Macintosh", "given": "Bruce" }, "orcid": "0000-0003-1212-7538" }, { "id": "Kasdin-N-J", "name": { "family": "Kasdin", "given": "N. Jeremy" } }, { "id": "Soummer-R", "name": { "family": "Soummer", "given": "R\u00e9mi" }, "orcid": "0000-0003-2753-2819" } ] }, "title": "High-contrast imager for Complex Aperture Telescopes (HiCAT): 1. Testbed design", "ispublished": "unpub", "full_text_status": "public", "keywords": "high angular resolution, coronagraphy, wavefront sensing, wavefront control", "note": "\u00a9 2013 Society of Photo-Optical Instrumentation Engineers (SPIE). Paper Date Published: 26 September 2013.\n\nThis work is supported by the National Aeronautics and Space Administration under Grant NNX12AG05G issued through the Astrophysics Research and Analysis (APRA) program (Soummer, PI). The authors acknowledge all the people involved during the process of the testbed design. In particular, they warmly thank Matt Kenworthy, Emmanuel Hugot and Marc Ferrari for fruitful discussions.\n\nPublished - 396374.pdf
Submitted - 1407.0979v1.pdf
", "abstract": "Searching for nearby habitable worlds with direct imaging and spectroscopy will require a telescope large enough to provide angular resolution and sensitivity to planets around a significant sample of stars. Segmented telescopes are a compelling option to obtain such large apertures. However, these telescope designs have a complex geometry (central obstruction, support structures, segmentation) that makes high-contrast imaging more challenging. We are developing a new high-contrast imaging testbed at STScI to provide an integrated solution for wavefront control and starlight suppression on complex aperture geometries. We present our approach for the testbed optical design, which defines the surface requirements for each mirror to minimize the amplitude-induced errors from the propagation of out-of-pupil surfaces. Our approach guarantees that the testbed will not be limited by these Fresnel propagation effects, but only by the aperture geometry. This approach involves iterations between classical ray-tracing optical design optimization, and end-to-end Fresnel propagation with wavefront control (e.g. Electric Field Conjugation / Stroke Minimization). The construction of the testbed is planned to start in late Fall 2013.", "date": "2013-09-26", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 88641K", "id_number": "CaltechAUTHORS:20150521-130036036", "isbn": "9780819497147", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-130036036", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "NNX12AG05G" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2023718", "primary_object": { "basename": "1407.0979v1.pdf", "url": "https://authors.library.caltech.edu/records/v8g6g-5cm94/files/1407.0979v1.pdf" }, "related_objects": [ { "basename": "396374.pdf", "url": "https://authors.library.caltech.edu/records/v8g6g-5cm94/files/396374.pdf" } ], "resource_type": "book_section", "pub_year": "2013", "author_list": "N'Diaye, Mamadou; Choquet, \u00c9lodie; et el." }, { "id": "https://authors.library.caltech.edu/records/rtq4a-mmd28", "eprint_id": 87202, "eprint_status": "archive", "datestamp": "2023-08-19 21:32:44", "lastmod": "2024-01-14 20:15:39", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "J." } }, { "id": "Moody-D", "name": { "family": "Moody", "given": "D." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Liewer-K", "name": { "family": "Liewer", "given": "K." } }, { "id": "Krist-J-E", "name": { "family": "Krist", "given": "J." } }, { "id": "Kern-B", "name": { "family": "Kern", "given": "B." } } ] }, "title": "High-contrast imaging results with the vortex coronagraph", "ispublished": "unpub", "full_text_status": "public", "keywords": "vortex optics, coronagraphy", "note": "\u00a9 2013 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.\n\nPublished - 88640Y.pdf
", "abstract": "The vortex coronagraph has already enabled high-contrast observations very close to bright stars on large ground-based telescopes, and it also has great potential for use on coronagraphic space missions aimed at exoplanet detection and characterization. As such, demonstrations of vortex coronagraph performance have recently been carried out in JPL's High Contrast Imaging Testbed. Some of our recent results are presented here, including the suppression of a monochromatic, single-polarization point-source to below the 10^(-9) level over a dark hole covering both the 2-7 \u03bb/D and 3-8 \u03bb/D regions, as well as the suppression of a 10% band of white-light to approximately the 10^(-8) level over a 3-8 \u03bb/D dark hole.", "date": "2013-09-26", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 88640Y", "id_number": "CaltechAUTHORS:20180618-150615283", "isbn": "9780819497147", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180618-150615283", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2024660", "primary_object": { "basename": "88640Y.pdf", "url": "https://authors.library.caltech.edu/records/rtq4a-mmd28/files/88640Y.pdf" }, "resource_type": "book_section", "pub_year": "2013", "author_list": "Serabyn, E.; Trauger, J.; et el." }, { "id": "https://authors.library.caltech.edu/records/rjc5n-nm528", "eprint_id": 87201, "eprint_status": "archive", "datestamp": "2023-08-19 21:32:39", "lastmod": "2024-01-14 20:15:36", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Carlotti-A", "name": { "family": "Carlotti", "given": "Alexis" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" } ] }, "title": "Optimal apodizers for the vector vortex coronagraph with on-axis telescopes", "ispublished": "unpub", "full_text_status": "public", "keywords": "Coronagraphy, High-Resolution Imaging, Exoplanet direct detection", "note": "\u00a9 2013 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nPublished - 88641P.pdf
", "abstract": "Phase mask coronagraphs such as the vortex coronagraph are meant to be used with the circular clear aperture of off-axis telescopes, and their performance is greatly reduced when used with on-axis telescopes. A possible solution to that problem consists in apodizing the entrance pupil plane of the coronagraph. Apodizers can be computed by solving a quadratic optimization problem in which the transmission of the apodizer is maximized under the constraint that the intensity of the electric field in the Lyot plane is less than an extremum value that is chosen to be small enough to sufficiently attenuate the starlight in the subsequent image plane. The transmission of the apodizer and the throughput of the system depends on the characteristics of the aperture and of the Lyot stop. We present apodizers optimally designed for the apertures of the Palomar telescope, the VLT, the E-ELT and the AFTA telescope, and for vortex phase masks with a topological charge of 4. Transmissions of 50 to 80% are found for mean contrast of 10^(-6) in the Lyot plane. The end throughput is between 16% and 55%, and mean contrast in the image plane at 2.5\u03bb/D is between 3 \u00d7 10^(-8) and 3 \u00d7 10^(-9).", "date": "2013-09-26", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 88641P", "id_number": "CaltechAUTHORS:20180618-144931063", "isbn": "9780819497147", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180618-144931063", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2024511", "primary_object": { "basename": "88641P.pdf", "url": "https://authors.library.caltech.edu/records/rjc5n-nm528/files/88641P.pdf" }, "resource_type": "book_section", "pub_year": "2013", "author_list": "Carlotti, Alexis; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.edu/records/pnhs1-anp84", "eprint_id": 87199, "eprint_status": "archive", "datestamp": "2023-08-19 21:32:30", "lastmod": "2024-01-14 20:15:30", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Milli-J", "name": { "family": "Milli", "given": "Julien" }, "orcid": "0000-0001-9325-2511" }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "Christian" } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien H." }, "orcid": "0000-0001-8627-0404" }, { "id": "O'Neal-J", "name": { "family": "O'Neal", "given": "Jared" } }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "Pierre" } }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "Anthony" }, "orcid": "0000-0001-9353-2724" }, { "id": "Bourget-P", "name": { "family": "Bourget", "given": "Pierre" } }, { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "Pontus" } }, { "id": "Gonte-F-Y-J", "name": { "family": "Gont\u00e9", "given": "Frederic" } }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "Serge" } }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "Mikael" }, "orcid": "0000-0002-2011-0851" }, { "id": "Kasper-M", "name": { "family": "Kasper", "given": "Markus" } }, { "id": "Lagrange-A-M", "name": { "family": "Lagrange", "given": "Anne-Marie" } }, { "id": "Lizon-J-L", "name": { "family": "Lizon", "given": "Jean-Louis" } }, { "id": "Mu\u017eic-K", "name": { "family": "Muzic", "given": "Koraljka" } }, { "id": "Pe\u00f1a-Eduardo", "name": { "family": "Pe\u00f1a", "given": "Eduardo" } }, { "id": "Olivier-R", "name": { "family": "Olivier", "given": "Richard" } }, { "id": "Slusarenko-N", "name": { "family": "Slusarenko", "given": "Nicolas" } }, { "id": "Tacconi-Garman-L-E", "name": { "family": "Tacconi-Garman", "given": "Lowell E." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" } ] }, "title": "Small-angle, high-contrast exoplanet imaging with the L-band AGPM vector vortex coronagraph now offered at the VLT", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, vortex coronagraphy, small inner working angle, adaptive optics, infrared, very large telescope", "note": "\u00a9 2013 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was carried out at the European Southern Observatory (ESO) site of Vitacura (Santiago, Chile). OA and JS acknowledge support from the Communaut\u00e9 fran\u00e7aise de Belgique - Actions de recherche concert\u00e9es - Acad\u00e9mie universitaire Wallonie-Europe.\n\nPublished - 88640I.pdf
", "abstract": "In November 2012, we installed an L-band annular groove phase mask (AGPM) vector vortex coronagraph (VVC) inside NACO, the adaptive optics camera of ESO's Very Large Telescope. The mask, made out of diamond subwavelength gratings has been commissioned, science qualified, and is now offered to the community. Here we report ground-breaking on-sky performance levels in terms of contrast, inner working angle, and discovery space. This new practical demonstration of the VVC, coming a few years after Palomar's and recent record-breaking lab experiments in the visible (E. Serabyn et al. 2013, these proceedings), shows once again that this new-generation coronagraph has reached a high level of maturity.", "date": "2013-09-26", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 88640I", "id_number": "CaltechAUTHORS:20180618-143339926", "isbn": "9780819497147", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180618-143339926", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique - Actions de recherche concert\u00e9es - Acad\u00e9mie universitaire Wallonie-Europe" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2025501", "primary_object": { "basename": "88640I.pdf", "url": "https://authors.library.caltech.edu/records/pnhs1-anp84/files/88640I.pdf" }, "resource_type": "book_section", "pub_year": "2013", "author_list": "Mawet, Dimitri; Absil, Olivier; et el." }, { "id": "https://authors.library.caltech.edu/records/92h9a-vva83", "eprint_id": 87198, "eprint_status": "archive", "datestamp": "2023-08-19 21:32:25", "lastmod": "2024-01-14 20:15:28", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Lawson-P-R", "name": { "family": "Lawson", "given": "P. R." } }, { "id": "Belikov-R", "name": { "family": "Belikov", "given": "R." } }, { "id": "Cash-W", "name": { "family": "Cash", "given": "W." } }, { "id": "Clampin-M-C", "name": { "family": "Clampin", "given": "M." } }, { "id": "Glassman-T", "name": { "family": "Glassman", "given": "T." } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "O." }, "orcid": "0000-0002-1097-9908" }, { "id": "Kasdin-N-J", "name": { "family": "Kasdin", "given": "N. J." } }, { "id": "Kern-B-D", "name": { "family": "Kern", "given": "B. D." } }, { "id": "Lyon-R", "name": { "family": "Lyon", "given": "R." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Moody-D-M", "name": { "family": "Moody", "given": "D." } }, { "id": "Samuele-R", "name": { "family": "Samuele", "given": "R." } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Sirbu-D", "name": { "family": "Sirbu", "given": "D." } }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "J." } } ] }, "title": "Survey of experimental results in high-contrast imaging for future exoplanet missions", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanets, coronagraphs, occulters, starshades, starlight suppression", "note": "\u00a9 2013 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nWork by PRL was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.\n\nPublished - 88641F.pdf
", "abstract": "We present and compare experimental results in high contrast imaging representing the state of the art in coronagraph and starshade technology. These experiments have been undertaken with the goal of demonstrating the capability of detecting Earth-like planets around nearby Sun-like stars. The contrast of an Earth seen in reflected light around a Sun-like star would be about 1.2 \u00d7 10^(\u221210). Several of the current candidate technologies now yield raw contrasts of 1.0 \u00d7 10^(\u22129) or better, and so should enable the detection of Earths, assuming a gain in sensitivity in post-processing of a factor of 10. We present results of coronagraph and starshade experiments conducted at visible and infrared wavelengths. Cross-sections of dark fields are directly compared as a function of field angle and bandwidth. The strength and differences of the techniques are compared.", "date": "2013-09-26", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 88641F", "id_number": "CaltechAUTHORS:20180618-142416187", "isbn": "9780819497147", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180618-142416187", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2021302", "primary_object": { "basename": "88641F.pdf", "url": "https://authors.library.caltech.edu/records/92h9a-vva83/files/88641F.pdf" }, "resource_type": "book_section", "pub_year": "2013", "author_list": "Lawson, P. R.; Belikov, R.; et el." }, { "id": "https://authors.library.caltech.edu/records/ce9s8-xx780", "eprint_id": 87203, "eprint_status": "archive", "datestamp": "2023-08-19 21:32:49", "lastmod": "2024-01-14 20:15:41", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Carlotti-A", "name": { "family": "Carlotti", "given": "Alexis" } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Wallace-J-C", "name": { "family": "Wallace", "given": "James" } }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "Pierre" } } ] }, "title": "The multistage and ring-apodized vortex coronagraph: two simple, small-angle coronagraphic solutions for heavily obscured apertures", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, vortex coronagraphy, on-axis telescopes, apodization, AFTA telescope, Extremely Large Telescopes", "note": "\u00a9 2013 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was carried out at the European Southern Observatory (ESO) site of Vitacura (Santiago, Chile).\n\nPublished - 886411.pdf
", "abstract": "Here we present two simple concepts to make the vortex coronagraph (VC) immune to heavily obscured apertures. The multi-stage VC (MSVC) uses the ability of the vortex to move light in and out of apertures through multiple VC in series to restore the nominal attenuation capability of the charge 2 vortex regardless of the aperture obscurations. The ring-apodized VC (RAVC) is a one-stage apodizer exploiting the VC Lyot-plane amplitude distribution in order to perfectly null the diffraction from any central obscuration size, and for any vortex topological charge. In this paper, we also emphasize the complementarity and similarities of the RAVC to the recently proposed Active Compensation of Aperture Discontinuities (ACAD, L. Pueyo et al. 2013, these proceedings) and more finely optimized shaped-pupil-like apodizations (A. Carlotti et al. 2013, these proceedings). This paper ends with a brief discussion about the trade-offs these techniques offer in the framework of the Extremely Large Telescopes (ELT) and the Astrophysics Focused Telescope Assets (AFTA).", "date": "2013-09-26", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 886411", "id_number": "CaltechAUTHORS:20180618-151123843", "isbn": "9780819497147", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180618-151123843", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2025574", "primary_object": { "basename": "886411.pdf", "url": "https://authors.library.caltech.edu/records/ce9s8-xx780/files/886411.pdf" }, "resource_type": "book_section", "pub_year": "2013", "author_list": "Mawet, Dimitri; Pueyo, Laurent; et el." }, { "id": "https://authors.library.caltech.edu/records/vtw2s-72317", "eprint_id": 57880, "eprint_status": "archive", "datestamp": "2023-08-19 19:48:37", "lastmod": "2024-01-13 16:20:52", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Patru-F", "name": { "family": "Patru", "given": "Fabien" } }, { "id": "Antichi-J", "name": { "family": "Antichi", "given": "Jacopo" } }, { "id": "Rabou-P", "name": { "family": "Rabou", "given": "Patrick" } }, { "id": "Giro-E", "name": { "family": "Giro", "given": "Enrico" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Milli-J", "name": { "family": "Milli", "given": "Julien" }, "orcid": "0000-0001-9325-2511" }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien" }, "orcid": "0000-0001-8627-0404" }, { "id": "Carbillet-M", "name": { "family": "Carbillet", "given": "Marcel" } }, { "id": "Mourard-D", "name": { "family": "Mourard", "given": "Denis" } } ] }, "title": "Discretized aperture mapping with a micro-lenses array for interferometric direct imaging", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2014\n\nPublished - fulltext_13389.pdf
", "abstract": "Discretized Aperture Mapping (DAM) appears as an original filtering tech nique easy to play with existing adaptive optics (AO) systems. In its essential DAM operates\nas an optical passive filter removing part of the phase residuals in the wavefront without introducing any difficult-to-align component in the Fourier conjugate of the entrance pupil plane. DAM reveals as a new interferometric technique combined with spatial filtering allowing direct imaging over a narrow field of view (FOV). In fact, the entrance pupil of a single telescope is divided into many sub-pupils so that the residual phase\nin each sub-pupil is filtered up to the DAM cut-off\nfrequency. DAM enables to smooth the small scale wavefront defects which correspond to high spatial frequencies in the\npupil plane and to low angular frequencies in the image plane. Close to the AO Nyquist frequency, such pupil plane spatial frequencies are not well measured by the wavefront sensor (WFS) due to aliasing. Once bigger than the AO Nyquist frequency, they are no more measured by the WFS due to the fitting limit responsible for the narrow AOFOV. The corresponding image plane angular frequencies are not tran\nsmitted by DAM and are useless to image small FOVs, as stated by interferometry. That is why AO and DAM are complementary assuming that the DAM cut-off frequency is equal to the AO Nyquist frequency. Here we describe the imaging capabilities when DAM is placed downstream an AO system, over a convenient pupil which precedes the\nscientific detector. We show firstly that the imaging properties are preserved on a narrow FOV allowing direct imaging throughout interferometry. Then we show how the residual pupil plane spatial frequencies bigger than the AO Nyquist one are filtered out, as well as the residual halo\nin the image is dimmed.", "date": "2013-05", "date_type": "published", "pagerange": "1-8", "id_number": "CaltechAUTHORS:20150528-125433797", "isbn": "978-88-908876-0-4", "book_title": "Third AO4ELT Conference", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150528-125433797", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Esposito-S", "name": { "family": "Esposito", "given": "Simone" } }, { "id": "Fini-L", "name": { "family": "Fini", "given": "Luca" } } ] }, "doi": "10.12839/AO4ELT3.13389", "primary_object": { "basename": "fulltext_13389.pdf", "url": "https://authors.library.caltech.edu/records/vtw2s-72317/files/fulltext_13389.pdf" }, "resource_type": "book_section", "pub_year": "2013", "author_list": "Patru, Fabien; Antichi, Jacopo; et el." }, { "id": "https://authors.library.caltech.edu/records/j3z38-vq779", "eprint_id": 57796, "eprint_status": "archive", "datestamp": "2023-08-19 18:55:26", "lastmod": "2023-10-23 17:45:42", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Gene" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Recent Progress in Vortex Coronagraphy", "ispublished": "unpub", "full_text_status": "restricted", "note": "\u00a9 2013 IEEE.\n\nPart of this research was carried out at the Jet Propulsion\nLaboratory, California Institute of Technology, under a\ncontract with NASA.", "abstract": "The Optical Vortex Coronagraph (OVC) is a phase-based coronagraph that can enable high-contrast imaging observations very near bright stars and can make use of smaller telescope diameters than most alternative techniques. This paper first briefly describes the basic principles of operation of the vortex coronagraph, which applies an azimuthal phase spiral to the focal plane point spread function, and then turns to recent advances, both in understanding and in the needed technology development. In particular, vortex phase masks based on circularly-symmetric half-wave plates made of both liquid-crystal polymers and photonic crystals have now achieved very good contrast. Moreover, a dual-stage vortex coronagraph configuration can be used to achieve high contrast in the case of an on-axis telescope, i.e., in the presence of obscuration due to a secondary mirror and a secondary support structure. Further development of the relevant vortex techniques could potentially enable a range of high-contrast coronagraphic space missions, from an initial explorer class mission to a large flagship class exoplanet imaging mission. Of particular interest in this regard is the use of one of the two former 2.4 m National Reconnaissance Office telescopes for coronagraphic observations.", "date": "2013-03", "date_type": "published", "publisher": "IEEE", "place_of_pub": "Piscataway, NJ", "pagerange": "1-6", "id_number": "CaltechAUTHORS:20150526-090116280", "isbn": "978-1-4673-1812-9", "book_title": "2013 IEEE Aerospace Conference", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-090116280", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "doi": "10.1109/AERO.2013.6497185", "resource_type": "book_section", "pub_year": "2013", "author_list": "Serabyn, Gene and Mawet, Dimitri" }, { "id": "https://authors.library.caltech.edu/records/9qx6w-5cn96", "eprint_id": 57759, "eprint_status": "archive", "datestamp": "2023-08-19 12:55:42", "lastmod": "2024-01-13 16:19:29", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Kerber-F", "name": { "family": "Kerber", "given": "Florian" } }, { "id": "K\u00e4ufl-H-U", "name": { "family": "K\u00e4ufl", "given": "Hans Ulrich" } }, { "id": "Baksai-P", "name": { "family": "Baksai", "given": "Pedro" } }, { "id": "Dobrzycka-D", "name": { "family": "Dobrzycka", "given": "Danuta" } }, { "id": "Finger-G", "name": { "family": "Finger", "given": "Gert" } }, { "id": "Ives-D", "name": { "family": "Ives", "given": "Derek" } }, { "id": "Gerd-J", "name": { "family": "Jakob", "given": "Gerd" } }, { "id": "Lagadec-E", "name": { "family": "Lagadec", "given": "Eric" } }, { "id": "Lundin-L", "name": { "family": "Lundin", "given": "Lars" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Mehrgan-L", "name": { "family": "Mehrgan", "given": "Leander" } }, { "id": "Moerchen-M", "name": { "family": "Moerchen", "given": "Margaret" } }, { "id": "Momany-Y", "name": { "family": "Momany", "given": "Yazan" } }, { "id": "Moraeu-V", "name": { "family": "Moreau", "given": "Vincent" } }, { "id": "Pantin-E", "name": { "family": "Pantin", "given": "Eric" } }, { "id": "Riquelme-M", "name": { "family": "Riquelme", "given": "Miguel" } }, { "id": "Siebenmorgen-R", "name": { "family": "Siebenmorgen", "given": "Ralf" } }, { "id": "Silber-A", "name": { "family": "Silber", "given": "Armin" } }, { "id": "Smette-A", "name": { "family": "Smette", "given": "Alain" } }, { "id": "Taylor-J", "name": { "family": "Taylor", "given": "Julian" } }, { "id": "van-den-Ancker-M", "name": { "family": "van den Ancker", "given": "Mario" } }, { "id": "Venema-L", "name": { "family": "Venema", "given": "Lars" } }, { "id": "Weilenmann-U", "name": { "family": "Weilenmann", "given": "Ueli" } }, { "id": "Yegorova-I", "name": { "family": "Yegorova", "given": "Irina" } } ] }, "title": "VISIR Upgrade Overview and Status", "ispublished": "unpub", "full_text_status": "public", "keywords": "VISIR, VLT, mid-IR, Aquarius, upgrade, PWV, pipeline, Reflex, TIMMI 2", "note": "\u00a9 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). September 27, 2012.\n\nThe commissioning team is grateful to Paranal staff for their excellent support during the commissioning and early operations.\n\nPublished - 396465.pdf
", "abstract": "We present an overview of the VISIR upgrade project. VISIR is the mid-infrared imager and spectrograph at ESO's VLT. The project team is comprised of ESO staff and members of the original VISIR consortium: CEA Saclay and ASTRON. The project plan is based on input from the ESO user community with the goal of enhancing the scientific performance and efficiency of VISIR by a combination of measures: installation of improved hardware, optimization of instrument operations and software support. The cornerstone of the upgrade is the 1k by 1k Si:As Aquarius detector array (Raytheon) which has demonstrated very good performance (sensitivity, stability) in the laboratory IR detector test facility (modified TIMMI 2 instrument). A prism spectroscopic mode will cover the N-band in a single observation. New scientific capabilities for high resolution and high-contrast imaging will be offered by sub-aperture mask (SAM) and phase-mask coronagraphic (4QPM/AGPM) modes. In order to make optimal use of favourable atmospheric conditions a water vapour monitor has been deployed on Paranal, allowing for real-time decisions and the introduction of a userdefined constraint on water vapour. Improved pipelines based on the ESO Reflex concept will provide better support to astronomers. The upgraded VISIR will be a powerful instrument providing background limited performance for diffraction-limited observations at an 8-m telescope. It will offer synergy with facilities such as ALMA, JWST, VLTI and SOFIA, while a wealth of targets is available from survey work (e.g. VISTA, WISE). In addition it will bring confirmation of the technical readiness and scientific value of several aspects of potential mid-IR instrumentation at Extremely Large Telescopes. The intervention on VISIR and installation of hardware has been completed in July and commissioning will take place during July and August. VISIR is scheduled to be available to the users starting Oct 2012.", "date": "2012-09-27", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 84460E", "id_number": "CaltechAUTHORS:20150522-074102957", "isbn": "9780819491473", "book_title": "Ground-based and Airborne Instrumentation for Astronomy IV", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150522-074102957", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "McLean-I-S", "name": { "family": "McLean", "given": "Ian S." } }, { "id": "Ramsay-S-K", "name": { "family": "Ramsay", "given": "Suzanne K." } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.924979", "primary_object": { "basename": "396465.pdf", "url": "https://authors.library.caltech.edu/records/9qx6w-5cn96/files/396465.pdf" }, "resource_type": "book_section", "pub_year": "2012", "author_list": "Kerber, Florian; K\u00e4ufl, Hans Ulrich; et el." }, { "id": "https://authors.library.caltech.edu/records/j52ej-m7024", "eprint_id": 57745, "eprint_status": "archive", "datestamp": "2023-08-19 12:51:51", "lastmod": "2024-01-13 16:19:25", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "C." } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Hanot-C", "name": { "family": "Hanot", "given": "C." } }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "M." }, "orcid": "0000-0002-2011-0851" }, { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "P." } }, { "id": "Pantin-E", "name": { "family": "Pantin", "given": "E." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } } ] }, "title": "A diamond AGPM coronagraph for VISIR", "ispublished": "unpub", "full_text_status": "public", "keywords": "coronagraphy, phase mask, high dynamic range, achromatization, subwavelength grating, vector vortex,\nexoplanet, circumstellar matter", "note": "\u00a9 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). Paper Date Published: 24 September 2012.\n\nC. Delacroix gratefully acknowledges the financial support of the Belgian Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture (FRIA) and Fonds de solidarit\u00e9 ULg. The authors from the Li\u00e8ge University acknowledge support from the Communaut\u00e9 fran\u00e7aise de Belgique - Actions de recherche concert\u00e9e - Acad\u00e9mie universitaire Wallonie-Europe.\n\nPublished - 396464.pdf
", "abstract": "In recent years, phase mask coronagraphy has become increasingly efficient in imaging the close environment of stars, enabling the search for exoplanets and circumstellar disks. Coronagraphs are ideally suited instruments, characterized by high dynamic range imaging capabilities, while preserving a small inner working angle. The AGPM (Annular Groove Phase Mask, Mawet et al. 2005) consists of a vector vortex induced by a rotationally symmetric subwavelength grating. This technique constitutes an almost unique solution to the achromatization at longer wavelengths (mid-infrared). For this reason, we have specially conceived a mid-infrared AGPM coronagraph for the forthcoming upgrade of VISIR, the mid-IR imager and spectrograph on the VLT at ESO (Paranal), in collaboration with members of the VISIR consortium. The implementation phase of the VISIR Upgrade Project is foreseen for May-August 2012, and the AGPM installed will cover the 11-13.2 \u03bcm spectral range. In this paper, we present the entire fabrication process of our AGPM imprinted on a diamond substrate. Diamond is an ideal material for mid-infrared wavelengths owing to its high transparency, small dispersion, extremely low thermal expansion and outstanding mechanical and chemical properties. The design process has been performed with an algorithm based on the rigorous coupled wave analysis (RCWA), and the micro-fabrication has been carried out using nano-imprint lithography and reactive ion etching. A precise grating profile metrology has also been conducted using cleaving techniques. Finally, we show the deposit of fiducials (i.e. centering marks) with Aerosol Jet Printing (AJP). We conclude with the ultimate coronagraph expected performances.", "date": "2012-09-24", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 84468K", "id_number": "CaltechAUTHORS:20150521-133310682", "isbn": "9780819491473", "book_title": "Ground-based and Airborne Instrumentation for Astronomy IV", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-133310682", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Belgian Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture (FRIA) and Fonds de solidarit\u00e9 ULg" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique - Actions de recherche concert\u00e9e - Acad\u00e9mie universitaire Wallonie-Europe" } ] }, "contributors": { "items": [ { "id": "McLean-I-S", "name": { "family": "McLean", "given": "Ian S." } }, { "id": "Ramsay-S-K", "name": { "family": "Ramsay", "given": "Suzanne K." } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.926494", "primary_object": { "basename": "396464.pdf", "url": "https://authors.library.caltech.edu/records/j52ej-m7024/files/396464.pdf" }, "resource_type": "book_section", "pub_year": "2012", "author_list": "Delacroix, C.; Absil, O.; et el." }, { "id": "https://authors.library.caltech.edu/records/k7fxj-e1342", "eprint_id": 57761, "eprint_status": "archive", "datestamp": "2023-08-19 12:51:55", "lastmod": "2024-01-13 16:19:31", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Gonte-F-Y-J", "name": { "family": "Gonte", "given": "Frederic Y. J." } }, { "id": "Bourget-P", "name": { "family": "Bourget", "given": "Pierre" } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien" }, "orcid": "0000-0001-8627-0404" }, { "id": "Haguenauer-P", "name": { "family": "Haguenauer", "given": "Pierre" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Conceptual study for a sub-pupil instrument having 4 high order adaptive optics paths for parallel multi-wavelength high contrast imaging, and medium resolution spectrometry", "ispublished": "unpub", "full_text_status": "public", "keywords": "high contrast imaging, coronagraphy, adaptive optics, exoplanet", "note": "\u00a9 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). September 24, 2012.\n\nPublished - 396466.pdf
", "abstract": "We present the concept of an instrument that will create 4 circular sub-pupils of 3 m in diameter. Each sub-pupil path will be corrected by a high order adaptive optics system (SR~80% in H) without spider and M2 obstruction. These four independent channels, obviously all pointed towards the same field, allows the possibility of covering totally different parts of the electromagnetic spectrum simultaneously without compromising Signal to Noise Ratio. Each channel can be dedicated to very specialized but complementary purposes: high contrast imaging, pseudo-wide field imaging, high precision multi-color photometry, medium-resolution spectroscopy, polarimetry and sparse-aperture masking.", "date": "2012-09-24", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 7Z", "id_number": "CaltechAUTHORS:20150522-080224076", "isbn": "9780819491473", "book_title": "Ground-based and Airborne Instrumentation for Astronomy IV", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150522-080224076", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "McLean-I-S", "name": { "family": "McLean", "given": "Ian S." } }, { "id": "Ramsay-S-K", "name": { "family": "Ramsay", "given": "Suzanne K." } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.927162", "primary_object": { "basename": "396466.pdf", "url": "https://authors.library.caltech.edu/records/k7fxj-e1342/files/396466.pdf" }, "resource_type": "book_section", "pub_year": "2012", "author_list": "Gonte, Frederic Y. J.; Bourget, Pierre; et el." }, { "id": "https://authors.library.caltech.edu/records/r653t-z3z56", "eprint_id": 57744, "eprint_status": "archive", "datestamp": "2023-08-19 12:43:50", "lastmod": "2024-01-13 16:19:23", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Bourget-P", "name": { "family": "Bourget", "given": "P." } }, { "id": "Schuhler-N", "name": { "family": "Schuhler", "given": "N." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Haguenauer-P", "name": { "family": "Haguenauer", "given": "P." } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "J." }, "orcid": "0000-0001-8627-0404" }, { "id": "Gonte-F-Y-J", "name": { "family": "Gonte", "given": "F." } } ] }, "title": "Extinction controlled Adaptive Mask Coronagraph Lyot and Phase Mask dual concept for wide extinction area", "ispublished": "unpub", "full_text_status": "public", "keywords": "high-contrast imaging, coronagraphy, polarization, high angular resolution, phase mask, adaptive optics", "note": "2012 Society of Photo-Optical Instrumentation Engineers (SPIE). Paper Date Published: 13 September 2012.\n\nThis work was carried out at the European Southern Observatory (ESO) site of Vitacura (Santiago, Chile).", "abstract": "A dual coronagraph based on the Adaptive Mask concept is presented in this paper. A Lyot coronagraph with a variable diameter occulting disk and a nulling stellar coronagraph based on the Adaptive Phase Mask concept using polarization interferometry are presented in this work. Observations on sky and numerical simulations show the usefulness of the proposed method to optimize the nulling efficiency of the coronagraphs. In the case of the phase mask, the active control system will correct for the detrimental effects of image instabilities on the destructive interference (low-order aberrations such as tip-tilt and focus). The phase mask adaptability both in size, phase and amplitude also compensate for manufacturing errors of the mask itself, and potentially for chromatic effects. Liquid-crystal properties are used to provide variable transmission of an annulus around the phase mask, but also to achieve the achromatic \u03c0 phase shift in the core of the PSF by rotating the polarization by 180\u00b0.A compressed mercury (Hg) drop is used as an occulting disk for the Lyot mask, its size control offers an adaptation to the seeing conditions and provides an optimization of the Tip-tilt correction.", "date": "2012-09-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 84505I", "id_number": "CaltechAUTHORS:20150521-131825253", "isbn": "9780819491510", "book_title": "Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-131825253", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Southern Observatory (ESO)" } ] }, "contributors": { "items": [ { "id": "Navarro-R", "name": { "family": "Navarro", "given": "Ram\u03ccn" } }, { "id": "Cunningham-C-R", "name": { "family": "Cunningham", "given": "Colin R." } }, { "id": "Prieto-E", "name": { "family": "Prieto", "given": "Eric" } } ] }, "doi": "10.1117/12.927284", "primary_object": { "basename": "396463.pdf", "url": "https://authors.library.caltech.edu/records/r653t-z3z56/files/396463.pdf" }, "resource_type": "book_section", "pub_year": "2012", "author_list": "Bourget, P.; Schuhler, N.; et el." }, { "id": "https://authors.library.caltech.edu/records/w3d64-9m249", "eprint_id": 57788, "eprint_status": "archive", "datestamp": "2023-08-19 12:44:01", "lastmod": "2024-01-13 16:19:47", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien H. V." }, "orcid": "0000-0001-8627-0404" }, { "id": "O'Neal-J", "name": { "family": "O'Neal", "given": "Jared" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Kasper-M", "name": { "family": "Kasper", "given": "Marcus" } }, { "id": "Zins-G", "name": { "family": "Zins", "given": "G\u00e9rard" } }, { "id": "Neichel-B", "name": { "family": "Neichel", "given": "Beno\u00eet" } }, { "id": "Kolb-J", "name": { "family": "Kolb", "given": "Johann" } }, { "id": "Christiaens-V", "name": { "family": "Christiaens", "given": "Valentin" }, "orcid": "0000-0002-0101-8814" }, { "id": "Tourneboeuf-M", "name": { "family": "Tourneboeuf", "given": "Martin" } } ] }, "title": "Image quality and high contrast improvements on VLT/NACO", "ispublished": "unpub", "full_text_status": "public", "keywords": "Adaptive Optics, High Angular Resolution, High Contrast Imaging, Very Large Telescope, Infrared\nAstronomy, Phase Diversity, Strehl Ratio, Calibration", "note": "\u00a9 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). September 13, 2012.\n\nJulien Girard would like to acknowledge the whole NACO IOT in particular Lowell Tacconi-Garman who provided very useful feedback on the elaboration of this paper. Finally he thanks ESO Paranal management, Engineering and IOT Coordinator Alain Smette for their valuable support. We are also thankful to Markus Hartung who shared his experience with us, Fran\u00e7ois Rigaut and Damien Gratadour who worked on Yorick/OPRA with Benoit Neichel.\n\nPublished - 396473.pdf
Submitted - 1210.3090v1.pdf
", "abstract": "NACO is the famous and versatile diffraction limited NIR imager and spectrograph at the VLT with which ESO celebrated 10 years of Adaptive Optics. Since two years a substantial effort has been put in understanding and fixing issues that directly affect the image quality and the high contrast performances of the instrument. Experiments to compensate the non-common-path aberrations and recover the highest possible Strehl ratios have been carried out successfully and a plan is hereafter described to perform such measurements regularly. The drift associated to pupil tracking since 2007 was fixed in october 2011. NACO is therefore even more suited for high contrast imaging and can be used with coronagraphic masks in the image plane. Some contrast measurements are shown and discussed. The work accomplished on NACO will serve as reference for the next generation instruments on the VLT, especially the ones working at the diffraction limit and making use of angular differential imaging (i.e. SPHERE, VISIR, and possibly ERIS).", "date": "2012-09-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 84470L", "id_number": "CaltechAUTHORS:20150526-073807198", "isbn": "978-0-8194-9148-0", "book_title": "Adaptive Optics Systems III", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-073807198", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Ellerbroek-B-L", "name": { "family": "Ellerbroek", "given": "Brent L." } }, { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.925660", "primary_object": { "basename": "1210.3090v1.pdf", "url": "https://authors.library.caltech.edu/records/w3d64-9m249/files/1210.3090v1.pdf" }, "related_objects": [ { "basename": "396473.pdf", "url": "https://authors.library.caltech.edu/records/w3d64-9m249/files/396473.pdf" } ], "resource_type": "book_section", "pub_year": "2012", "author_list": "Girard, Julien H. V.; O'Neal, Jared; et el." }, { "id": "https://authors.library.caltech.edu/records/av6q7-tev72", "eprint_id": 57779, "eprint_status": "archive", "datestamp": "2023-08-19 12:43:55", "lastmod": "2024-01-13 16:19:45", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Lawson-P-R", "name": { "family": "Lawson", "given": "Peter R." } }, { "id": "Poyneer-L", "name": { "family": "Poyneer", "given": "Lisa" } }, { "id": "Barrett-H", "name": { "family": "Barrett", "given": "Harrison" } }, { "id": "Frazin-R", "name": { "family": "Frazin", "given": "Richard" } }, { "id": "Caucci-L", "name": { "family": "Caucci", "given": "Luca" } }, { "id": "Devaney-N", "name": { "family": "Devaney", "given": "Nicholas" } }, { "id": "Furenlid-L", "name": { "family": "Furenlid", "given": "Lars" } }, { "id": "G\u0142adysz-S", "name": { "family": "G\u0142adysz", "given": "Szymon" } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Krist-J-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Maire-J", "name": { "family": "Maire", "given": "J\u00e9r\u00f4me" } }, { "id": "Marois-C", "name": { "family": "Marois", "given": "Christian" }, "orcid": "0000-0002-4164-4182" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Mouillet-D", "name": { "family": "Mouillet", "given": "David" } }, { "id": "Mugnier-L", "name": { "family": "Mugnier", "given": "Laurent" } }, { "id": "Pearson-I", "name": { "family": "Pearson", "given": "Iain" } }, { "id": "Perrin-M-D", "name": { "family": "Perrin", "given": "Marshall" }, "orcid": "0000-0002-3191-8151" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Savransky-D", "name": { "family": "Savransky", "given": "Dmitry" } } ] }, "title": "On Advanced Estimation Techniques for Exoplanet Detection and Characterization Using Ground-based Coronagraphs", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanets, coronagraphs, adaptive optics, instrumentation, theory", "note": "\u00a9 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was undertaken with support of a seed grant from the National Academies Keck Futures Initiative. Work at the University of Arizona was supported in part by the National Institutes of Health under grant no. 2R01EB000803-21. The authors are extremely grateful for data for Figure 1 provided by the following individuals: Markus Kasper\n(ESO)for ELT-EPICS; John Krist (JPL/Caltech) for JWST NIRCam and HST/ACS curves; Bruce Macintosh (UC Santa Cruz) for TMT PFI data; Christian Marois (HIA, NRC) for the K-band data for Keck NIRC2; Dimitri Mawet (ESO) for the K-band data for VLT-NACO, and the H-band curve for the Palomar Well-Corrected Sub-aperture; GPI data downloaded from planetimager.org, corresponding to predictions by McBride; Dino Mesa (INAF) for the data for the Integral Field Spectrograph of VLT-SPHERE;28 and Ben Oppenheimer (AMNH) for the curve for Project 1640. Figure 1 was partly inspired by a previous illustration by Wesley Traub and John Trauger (JPL). This work was partly conducted at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. Reference in this paper to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not constitute or imply its endorsement by the United States Government or the Jet Propulsion Laboratory, California Institute of Technology.\n\nPublished - 396472.pdf
", "abstract": "The direct imaging of planets around nearby stars is exceedingly difficult. Only about 14 exoplanets have been imaged to date that have masses less than 13 times that of Jupiter. The next generation of planet-finding coronagraphs, including VLT-SPHERE, the Gemini Planet Imager, Palomar P1640, and Subaru HiCIAO have predicted contrast performance of roughly a thousand times less than would be needed to detect Earth-like planets. In this paper we review the state of the art in exoplanet imaging, most notably the method of Locally Optimized Combination of Images (LOCI), and we investigate the potential of improving the detectability of faint exoplanets through the use of advanced statistical methods based on the concepts of the ideal observer and the Hotelling observer. We propose a formal comparison of techniques using a blind data challenge with an evaluation of performance using the Receiver Operating Characteristic (ROC) and Localization ROC (LROC) curves. We place particular emphasis on the understanding and modeling of realistic sources of measurement noise in ground-based AO-corrected coronagraphs. The work reported in this paper is the result of interactions between the co-authors during a week-long workshop on exoplanet imaging that was held in Squaw Valley, California, in March of 2012.", "date": "2012-09-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 844722", "id_number": "CaltechAUTHORS:20150522-112029062", "isbn": "9780819491480", "book_title": "Adaptive Optics Systems III", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150522-112029062", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "National Academies Keck Futures Initiative" }, { "agency": "NIH", "grant_number": "2R01EB000803-21" }, { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Ellerbroek-B-L", "name": { "family": "Ellerbroek", "given": "Brent L." } }, { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.925099", "primary_object": { "basename": "396472.pdf", "url": "https://authors.library.caltech.edu/records/av6q7-tev72/files/396472.pdf" }, "resource_type": "book_section", "pub_year": "2012", "author_list": "Lawson, Peter R.; Poyneer, Lisa; et el." }, { "id": "https://authors.library.caltech.edu/records/cxq43-xn643", "eprint_id": 57763, "eprint_status": "archive", "datestamp": "2023-09-15 05:01:53", "lastmod": "2024-01-13 16:19:33", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John" } }, { "id": "Moody-D-C", "name": { "family": "Moody", "given": "Dwight" } }, { "id": "Gordon-B", "name": { "family": "Gordon", "given": "Brian" } }, { "id": "Krist-John-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Complex apodization Lyot coronagraphy for the direct imaging of exoplanet systems: design, fabrication, and laboratory demonstration", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). August 22, 2012.\n\nWe thank Peter Lawson and the TDEM Technology Assessment Committee for their valuable comments and critical review of this work. We acknowledge the support provided by Brian Kern, Albert Niessner, and the ExEP HCIT infrastructure team during the laboratory demonstrations. The research described in this paper was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.\n\nPublished - 396468.pdf
", "abstract": "We review the design, fabrication, performance, and future prospects for a complex apodized Lyot coronagraph for highcontrast exoplanet imaging and spectroscopy. We present a newly designed circular focal plane mask with an inner working angle of 2.5 \u03bb/D. Thickness-profiled metallic and dielectric films superimposed on a glass substrate provide control over both the real and imaginary parts of the coronagraph wavefront. Together with a deformable mirror for control of wavefront phase, the complex Lyot coronagraph potentially exceeds billion-to-one contrast over dark fields extending to within angular separations of 2.5 \u03bb/D from the central star, over spectral bandwidths of 20% or more, and with throughput efficiencies better than 50%. Our approach is demonstrated with a linear occulting mask, for which we report our best laboratory imaging contrast achieved to date. Raw image contrasts of 3\u00d710^(-10) over 2% bandwidths, 6\u00d710^(-10) over 10% bandwidths, and 2\u00d710^(-9) over 20% bandwidths are consistently achieved across high contrast fields extending from an inner working angle of 3 \u03bb/D to a radius of 15 \u03bb/D. Occulter performance is analyzed in light of experiments and optical models, and prospects for further progress are summarized. The science capability of the hybrid Lyot coronagraph is compared with requirements for ACCESS, a representative space coronagraph concept for the direct imaging and spectroscopy of exoplanet systems. This work has been supported by NASA's Strategic Astrophysics Technology / Technology Demonstrations for Exoplanet Missions (SAT/TDEM) program.", "date": "2012-08-22", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 84424Q", "id_number": "CaltechAUTHORS:20150522-081604588", "isbn": "9780819491435", "book_title": "Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150522-081604588", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Clampin-M-C", "name": { "family": "Clampin", "given": "Mark C." } }, { "id": "Fazio-G-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Oschmann-J-M-Jr", "name": { "family": "Oschmann", "given": "Jacobus M., Jr." } } ] }, "doi": "10.1117/12.926663", "primary_object": { "basename": "396468.pdf", "url": "https://authors.library.caltech.edu/records/cxq43-xn643/files/396468.pdf" }, "resource_type": "book_section", "pub_year": "2012", "author_list": "Trauger, John; Moody, Dwight; et el." }, { "id": "https://authors.library.caltech.edu/records/tebj6-5h298", "eprint_id": 57766, "eprint_status": "archive", "datestamp": "2023-09-15 05:02:05", "lastmod": "2024-01-13 16:19:37", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Murakami-Naoshi", "name": { "family": "Murakami", "given": "Naoshi" } }, { "id": "Nishikawa-Jun", "name": { "family": "Nishikawa", "given": "Jun" } }, { "id": "Traub-W-A", "name": { "family": "Traub", "given": "Wesley A." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Moody-D-C", "name": { "family": "Moody", "given": "Dwight C." } }, { "id": "Kern-B-D", "name": { "family": "Kern", "given": "Brian D." } }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John T." } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Hamaguchi-Shoki", "name": { "family": "Hamaguchi", "given": "Shoki" } }, { "id": "Oshiyama-Fumika", "name": { "family": "Oshiyama", "given": "Fumika" } }, { "id": "Sakamoto-Moritsugu", "name": { "family": "Sakamoto", "given": "Moritsugu" } }, { "id": "Ise-Akitoshi", "name": { "family": "Ise", "given": "Akitoshi" } }, { "id": "Oka-Kazuhiko", "name": { "family": "Oka", "given": "Kazuhiko" } }, { "id": "Baba-Naoshi", "name": { "family": "Baba", "given": "Naoshi" } }, { "id": "Murakami-Hiroshi", "name": { "family": "Murakami", "given": "Hiroshi" } }, { "id": "Tamura-Motohide", "name": { "family": "Tamura", "given": "Motohide" }, "orcid": "0000-0002-6510-0681" } ] }, "title": "Coronagraph focal-plane phase masks based on photonic crystal technology: recent progress and observational strategy", "ispublished": "unpub", "full_text_status": "public", "keywords": "high-contrast imaging, extrasolar planets, photonic crystal, coronagraphy, eight-octant phase-mask coronagraph, vector vortex coronagraph, polarization", "note": "\u00a9 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). August 22, 2012.\n\nWe acknowledge Takayuki Kawashima of the Photonic Lattice Inc. for providing us with useful information on a photonic-crystal device. This works were carried out at the Hokkaido University, and at the Jet Propulsion Laboratory (JPL), California Institute of Technology, under a contract with the National Aeronautics and Space Administration (NASA). This research was partially supported by the National Astronomical Observatory of Japan (NAOJ), the Japan Aerospace Exploration Agency (JAXA), and the Japan Society for the Promotion of Science (JSPS) through KAKENHI (21340041, 23740139). MT is supported by KAKENHI 22000005.\n\nPublished - 396470.pdf
", "abstract": "Photonic crystal, an artificial periodic nanostructure of refractive indices, is one of the attractive technologies for coronagraph focal-plane masks aiming at direct imaging and characterization of terrestrial extrasolar planets. We manufactured the eight-octant phase mask (8OPM) and the vector vortex coronagraph (VVC) mask very precisely using the photonic crystal technology. Fully achromatic phase-mask coronagraphs can be realized by applying appropriate polarization filters to the masks. We carried out laboratory experiments of the polarization-filtered 8OPM coronagraph using the High-Contrast Imaging Testbed (HCIT), a state-of-the-art coronagraph simulator at the Jet Propulsion Laboratory (JPL). We report the experimental results of 10-8-level contrast across several wavelengths over 10% bandwidth around 800nm. In addition, we present future prospects and observational strategy for the photonic-crystal mask coronagraphs combined with differential imaging techniques to reach higher contrast. We proposed to apply the polarization-differential imaging (PDI) technique to the VVC, in which we built a two-channel coronagraph using polarizing beam splitters to avoid a loss of intensity due to the polarization filters. We also proposed to apply the angular-differential imaging (ADI) technique to the 8OPM coronagraph. The 8OPM/ADI mode mitigates an intensity loss due to a phase transition of the mask and provides a full field of view around central stars. We present results of preliminary laboratory demonstrations of the PDI and ADI observational modes with the phase-mask coronagraphs.", "date": "2012-08-22", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 824205", "id_number": "CaltechAUTHORS:20150522-085433692", "isbn": "9780819491435", "book_title": "Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150522-085433692", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "National Astronomical Observatory of Japan" }, { "agency": "Japan Aerospace Exploration Agency (JAXA)" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "21340041" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "23740139" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "22000005" } ] }, "contributors": { "items": [ { "id": "Clampin-M-C", "name": { "family": "Clampin", "given": "Mark C." } }, { "id": "Fazio-G-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Oschmann-J-M-Jr", "name": { "family": "Oschmann", "given": "Jacobus M., Jr." } } ] }, "doi": "10.1117/12.925613", "primary_object": { "basename": "396470.pdf", "url": "https://authors.library.caltech.edu/records/tebj6-5h298/files/396470.pdf" }, "resource_type": "book_section", "pub_year": "2012", "author_list": "Murakami, Naoshi; Nishikawa, Jun; et el." }, { "id": "https://authors.library.caltech.edu/records/9dkxk-8xj54", "eprint_id": 57765, "eprint_status": "archive", "datestamp": "2023-09-15 05:01:59", "lastmod": "2024-01-13 16:19:35", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Unwin-S-C", "name": { "family": "Unwin", "given": "Stephen" } }, { "id": "Traub-W-A", "name": { "family": "Traub", "given": "Wesley" } }, { "id": "Bryden-G", "name": { "family": "Bryden", "given": "Geoffrey" } }, { "id": "Brugarolas-P-B", "name": { "family": "Brugarolas", "given": "Paul" } }, { "id": "Chen-Pin", "name": { "family": "Chen", "given": "Pin" } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Hillenbrand-L-A", "name": { "family": "Hillenbrand", "given": "Lynne" } }, { "id": "Krist-John-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Macintosh-B-A", "name": { "family": "Macintosh", "given": "Bruce" }, "orcid": "0000-0003-1212-7538" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Moody-D-C", "name": { "family": "Moody", "given": "Dwight" } }, { "id": "Roberts-L-C-Jr", "name": { "family": "Roberts", "given": "Lewis C., Jr." }, "orcid": "0000-0003-3892-2900" }, { "id": "Stapelfeldt-K-R", "name": { "family": "Stapelfeldt", "given": "Karl" }, "orcid": "0000-0002-2805-7338" }, { "id": "Stuchlik-D", "name": { "family": "Stuchlik", "given": "David" } }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John" } }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" } ] }, "title": "Coronagraphic Imaging of Debris Disks From a High Altitude Balloon Platform", "ispublished": "unpub", "full_text_status": "public", "keywords": "Suborbital, Coronagraph, Debris Disks, Exoplanets", "note": "\u00a9 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). August 22, 2012.\n\nSome of the research described in this publication was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.\n\nPublished - 396469.pdf
", "abstract": "Debris disks around nearby stars are tracers of the planet formation process, and they are a key element of our understanding of the formation and evolution of extrasolar planetary systems. With multi-color images of a significant number of disks, we can probe important questions: can we learn about planetary system evolution; what materials are the disks made of; and can they reveal the presence of planets? Most disks are known to exist only through their infrared flux excesses as measured by the Spitzer Space Telescope, and through images measured by Herschel. The brightest, most extended disks have been imaged with HST, and a few, such as Fomalhaut, can be observed using ground-based telescopes. But the number of good images is still very small, and there are none of disks with densities as low as the disk associated with the asteroid belt and Edgeworth\u00ad Kuiper belt in our own Solar System. Direct imaging of disks is a major observational challenge, demanding high angular resolution and extremely high dynamic range close to the parent star. The ultimate experiment requires a space-based platform, but demonstrating much of the needed technology, mitigating the technical risks of a space-based coronagraph, and performing valuable measurements of circumstellar debris disks, can be done from a high-altitude balloon platform. In this paper we present a balloon-borne telescope concept based on the Zodiac II design that could undertake compelling studies of a sample of debris disks.", "date": "2012-08-22", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 84420G", "id_number": "CaltechAUTHORS:20150522-083914095", "isbn": "9780819491435", "book_title": "Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150522-083914095", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Clampin-M-C", "name": { "family": "Clampin", "given": "Mark C." } }, { "id": "Fazio-G-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Oschmann-J-M-Jr", "name": { "family": "Oschmann", "given": "Jacobus M., Jr." } } ] }, "doi": "10.1117/12.924175", "primary_object": { "basename": "396469.pdf", "url": "https://authors.library.caltech.edu/records/9dkxk-8xj54/files/396469.pdf" }, "resource_type": "book_section", "pub_year": "2012", "author_list": "Unwin, Stephen; Traub, Wesley; et el." }, { "id": "https://authors.library.caltech.edu/records/khjmw-f5n45", "eprint_id": 57778, "eprint_status": "archive", "datestamp": "2023-08-19 12:22:35", "lastmod": "2024-01-13 16:19:43", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Lawson-P-R", "name": { "family": "Lawson", "given": "Peter" } }, { "id": "Traub-W-A", "name": { "family": "Traub", "given": "Wesley" } }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Krist-John-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "James K." } } ] }, "title": "Review of small-angle coronagraphic techniques in the wake of ground-based second-generation adaptive optics systems", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, coronagraphy, inner working angle, adaptive optics, observing strategy, post-processing", "note": "\u00a9 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). August 22, 2012.\n\nThis work was carried out at the European Southern Observatory (ESO) site of Vitacura (Santiago, Chile), and the Jet Propulsion Laboratory (JPL), California Institute of Technology (Caltech), under contract with the National Aeronautics and Space Administration (NASA). The first author is grateful to the organizers and participants of the Exoplanet Imaging Workshop held 25-30 March 2012 at the Resort at Squaw Creek, California.\n\nPublished - 396471.pdf
Submitted - 1207.5481v1.pdf
", "abstract": "Small-angle coronagraphy is technically and scientifically appealing because it enables the use of smaller telescopes, allows covering wider wavelength ranges, and potentially increases the yield and completeness of circumstellar environment \u2013 exoplanets and disks \u2013 detection and characterization campaigns. However, opening up this new parameter space is challenging. Here we will review the four posts of high contrast imaging and their intricate interactions at very small angles (within the first 4 resolution elements from the star). The four posts are: choice of coronagraph, optimized wavefront control, observing strategy, and post-processing methods. After detailing each of the four foundations, we will present the lessons learned from the 10+ years of operations of zeroth and first-generation adaptive optics systems. We will then tentatively show how informative the current integration of second-generation adaptive optics system is, and which lessons can already be drawn from this fresh experience. Then, we will review the current state of the art, by presenting world record contrasts obtained in the framework of technological demonstrations for space-based exoplanet imaging and characterization mission concepts. Finally, we will conclude by emphasizing the importance of the cross-breeding between techniques developed for both ground-based and space-based projects, which is relevant for future high contrast imaging instruments and facilities in space or on the ground.", "date": "2012-08-22", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 844204", "id_number": "CaltechAUTHORS:20150522-110016428", "isbn": "9780819491435", "book_title": "Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150522-110016428", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Clampin-M-C", "name": { "family": "Clampin", "given": "Mark C." } }, { "id": "Fazio-G-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Oschmann-J-M-Jr", "name": { "family": "Oschmann", "given": "Jacobus M. Jr." } } ] }, "doi": "10.1117/12.927245", "primary_object": { "basename": "1207.5481v1.pdf", "url": "https://authors.library.caltech.edu/records/khjmw-f5n45/files/1207.5481v1.pdf" }, "related_objects": [ { "basename": "396471.pdf", "url": "https://authors.library.caltech.edu/records/khjmw-f5n45/files/396471.pdf" } ], "resource_type": "book_section", "pub_year": "2012", "author_list": "Mawet, Dimitri; Lawson, Peter; et el." }, { "id": "https://authors.library.caltech.edu/records/9d4te-8zy05", "eprint_id": 57651, "eprint_status": "archive", "datestamp": "2023-08-19 09:17:21", "lastmod": "2024-01-13 16:18:31", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Martayan-C", "name": { "family": "Martayan", "given": "C." } }, { "id": "Lobel-A", "name": { "family": "Lobel", "given": "A." } }, { "id": "Baade-D", "name": { "family": "Baade", "given": "D." } }, { "id": "Blomme-R", "name": { "family": "Blomme", "given": "R." } }, { "id": "Fr\u00e9mat-Y", "name": { "family": "Fr\u00e9mat", "given": "Y." } }, { "id": "LeBouqin-J-B", "name": { "family": "LeBouquin", "given": "J.-B." } }, { "id": "Selman-F", "name": { "family": "Selman", "given": "F." } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "J." }, "orcid": "0000-0001-8627-0404" }, { "id": "M\u00e9rand-A", "name": { "family": "M\u00e9rand", "given": "A." } }, { "id": "Montagnier-G", "name": { "family": "Montagnier", "given": "G." } }, { "id": "Patru-F", "name": { "family": "Patru", "given": "F." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Martins-F", "name": { "family": "Martins", "given": "F." } }, { "id": "Rivinius-Th", "name": { "family": "Rivinius", "given": "Th." } }, { "id": "\u0160tefl-S", "name": { "family": "\u0160tefl", "given": "S." } }, { "id": "Zorec-J", "name": { "family": "Zorec", "given": "J." } }, { "id": "Semaan-T", "name": { "family": "Semaan", "given": "T." } }, { "id": "Mehner-A", "name": { "family": "Mehner", "given": "A." }, "orcid": "0000-0002-9564-3302" }, { "id": "Kervella-P", "name": { "family": "Kervella", "given": "P." }, "orcid": "0000-0003-0626-1749" }, { "id": "Sana-H", "name": { "family": "Sana", "given": "H." } }, { "id": "Sch\u00f6del-R", "name": { "family": "Sch\u00f6del", "given": "R." } } ] }, "title": "On the Binarity of LBV Stars", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2012 Astronomical Society of the Pacific. \n\nObservations were carried out under GTO program ID 085.D-0125(A), normal program IDs 085.D-0625(A,B,C), 087.D-0426(A to G). CMa is grateful to ESO colleagues (astronomers, telescope operators, engineers) for their help in this study. This research has made use of the Simbad and Vizier databases maintained at CDS, Strasbourg, France.\n\nPublished - 464-0293.pdf
", "abstract": "We report on the binarity of luminous blue variable stars observed with a set of techniques and instruments. Among them, observations at high angular resolution with the VLT-NACO, the VLTI-AMBER and with spectrographs such as the VLT-XSHOOTER allowed us to find several LBV stars as binaries or having a potential companion. In particular the LBV Pistol Star clearly presents radial velocity variations and line profiles modifications (double peak appearance). In addition, the absorption component of the P Cygni lines varies as well with the time indicating a potential wind structure variability. Our observations also show directly for the first time a companion to at least one of the observed LBVs (HD 168625). This one seems to affect the environment of the system. This system is known to be surrounded by several rings similar to those of SN1987A, possibly indicating a future supernova occurrence for this Galactic object. These results show that Eta Car is no longer unique.", "date": "2012", "date_type": "published", "publisher": "Astronomical Society of the Pacific", "place_of_pub": "San Francisco, CA", "pagerange": "293-330", "id_number": "CaltechAUTHORS:20150519-101639222", "isbn": "978-1-58381-810-7", "book_title": "Circumstellar Dynamics at High Resolution", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150519-101639222", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Carciofi-A", "name": { "family": "Carciofi", "given": "Alex" } }, { "id": "Rivinius-Th", "name": { "family": "Rivinius", "given": "Thomas" } } ] }, "primary_object": { "basename": "464-0293.pdf", "url": "https://authors.library.caltech.edu/records/9d4te-8zy05/files/464-0293.pdf" }, "resource_type": "book_section", "pub_year": "2012", "author_list": "Martayan, C.; Lobel, A.; et el." }, { "id": "https://authors.library.caltech.edu/records/ng7kx-1q625", "eprint_id": 57794, "eprint_status": "archive", "datestamp": "2023-08-19 08:04:50", "lastmod": "2024-01-13 16:19:55", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John" } }, { "id": "Moody-D", "name": { "family": "Moody", "given": "Dwight" } }, { "id": "Gordon-B", "name": { "family": "Gordon", "given": "Brian" } }, { "id": "Krist-J-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "A hybrid Lyot coronagraph for the direct imaging and spectroscopy of exoplanet systems: recent results and prospects", "ispublished": "unpub", "full_text_status": "public", "keywords": "exoplanet, coronagraph, active optics", "note": "\u00a9 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). September 15, 2011.\n\nThis work has been supported by NASA's Technology Demonstration for Exoplanet Missions (TDEM) program.\nWe acknowledge the support and valuable discussions provided by Brian Kern, Albert Niessner, and the ExEP HCIT\ninfrastructure team during the laboratory demonstrations. The research described in this paper was carried out at the Jet\nPropulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space\nAdministration.\n\nPublished - 396476.pdf
", "abstract": "We report our best laboratory contrast demonstrations achieved to date. We review the design, fabrication, performance, and future prospects of a hybrid focal plane occulter for exoplanet coronagraphy. Composed of thickness-profiled metallic and dielectric thin films vacuum deposited on a fused silica substrate, the hybrid occulter uses two superimposed thin films for control over both the real and imaginary parts of the complex attenuation pattern. Together with a deformable mirror for adjustment of wavefront phase, the hybrid Lyot coronagraph potentially exceeds billion-toone contrast over dark fields extending to within angular separations of 3 \u03bb/D from the central star, over spectral bandwidths of 20% or more, and with throughput efficiencies up to 60%. We report laboratory contrasts of 3\u00d710^(-10) over 2% bandwidths, 6\u00d710^(-10) over 10% bandwidths, and 2\u00d710^(-9) over 20% bandwidths, achieved across high contrast fields extending from an inner working angle of 3 \u03bb/D to a radius of 15 \u03bb/D. Occulter performance is analyzed in light of recent experiments and optical models, and prospects for further improvements are summarized. The science capabilities of the hybrid Lyot coronagraph are compared with requirements of the ACCESS mission, a representative exoplanet space telescope concept study for the direct imaging and spectroscopy of exoplanet systems.", "date": "2011-09-15", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 81510G", "id_number": "CaltechAUTHORS:20150526-084726251", "isbn": "978-0-81948-761-2", "book_title": "Techniques and Instrumentation for Detection of Exoplanets V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-084726251", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA Technology Demostration for Exoplanet Missions (TDEM) program" }, { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.895032", "primary_object": { "basename": "396476.pdf", "url": "https://authors.library.caltech.edu/records/ng7kx-1q625/files/396476.pdf" }, "resource_type": "book_section", "pub_year": "2011", "author_list": "Trauger, John; Moody, Dwight; et el." }, { "id": "https://authors.library.caltech.edu/records/dassw-24t60", "eprint_id": 57797, "eprint_status": "archive", "datestamp": "2023-08-19 08:04:55", "lastmod": "2024-01-13 16:19:57", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Krist-J-E", "name": { "family": "Krist", "given": "John E." } }, { "id": "Belikov-R", "name": { "family": "Belikov", "given": "Ruslan" } }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri P." }, "orcid": "0000-0002-8895-4735" }, { "id": "Moody-D-C", "name": { "family": "Moody", "given": "Dwight" } }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John T." } }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "title": "Assessing the performance limits of internal coronagraphs through end-to-end modeling: a NASA TDEM study", "ispublished": "unpub", "full_text_status": "public", "keywords": "Coronagraph", "note": "\u00a9 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nDate Published: 15 September 2011.\n\nThis work was performed at the Jet Propulsion Laboratory/California Inst. of Tech. and NASA Ames Research Center as part of NASA ROSES 09-TDEM09-0017.\n\nPublished - 396477.pdf
", "abstract": "As part of the NASA ROSES Technology Development for Exoplanet Missions (TDEM) program, we are conducting a study of three internal coronagraphs (PIAA, vector vortex, hybrid bandlimited) to understand their behaviors in realistically-aberrated systems with wavefront control (deformable mirrors). This study consists of two milestones: (1) develop wavefront propagation codes appropriate for each coronagraph that are accurate to 1% or better (compared to a reference algorithm) but are also time and memory efficient, and (2) use these codes to determine the wavefront control limits of each architecture. We discuss the results from the study so far, with emphasis on representing the PIAA coronagraph and its wavefront control behavior.", "date": "2011-09-15", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 81510E", "id_number": "CaltechAUTHORS:20150526-090229627", "isbn": "978-0-81948-761-2", "book_title": "Techniques and Instrumentation for Detection of Exoplanets V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-090229627", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "JPL/Caltech" }, { "agency": "NASA", "grant_number": "ROSES 09-TDEM09-0017" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.892772", "primary_object": { "basename": "396477.pdf", "url": "https://authors.library.caltech.edu/records/dassw-24t60/files/396477.pdf" }, "resource_type": "book_section", "pub_year": "2011", "author_list": "Krist, John E.; Belikov, Ruslan; et el." }, { "id": "https://authors.library.caltech.edu/records/wvssm-dv736", "eprint_id": 57792, "eprint_status": "archive", "datestamp": "2023-08-19 08:04:44", "lastmod": "2024-01-13 16:19:51", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Moody-D", "name": { "family": "Moody", "given": "Dwight" } }, { "id": "Kern-B", "name": { "family": "Kern", "given": "Brian" } }, { "id": "Niessner-A", "name": { "family": "Niessner", "given": "Albert" } }, { "id": "Kuhnert-A", "name": { "family": "Kuhnert", "given": "Andreas" } }, { "id": "Shemo-D-M", "name": { "family": "Shemo", "given": "David" } }, { "id": "Chipman-R", "name": { "family": "Chipman", "given": "Russell" } }, { "id": "McClain-S", "name": { "family": "McClain", "given": "Stephen" } }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John" } } ] }, "title": "Recent results of the second generation of vector vortex\n coronagraphs on the high-contrast imaging testbed at JPL", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, exoplanets, phase-mask coronagraphy, vector vortex coronagraph, liquid\ncrystal polymers, wavefront control, electric field conjugation", "note": "\u00a9 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). September 15, 2011.\n\nThis work was carried out at the European Southern Observatory (ESO) site of Vitacura (Santiago, Chile),\nand the Jet Propulsion Laboratory (JPL), California Institute of Technology (Caltech), under contract with the\nNational Aeronautics and Space Administration (NASA).\n\nPublished - 396475.pdf
", "abstract": "The Vector Vortex Coronagraph (VVC) is an attractive internal coronagraph solution to image and characterize exoplanets. It provides four key pillars on which efficient high contrast imaging instruments can be built for ground- and space-based telescopes: small inner working angle, high throughput, clear off-axis discovery space, and simple layout. We present the status of the VVC technology development supported by NASA. We will review recent results of the optical tests of the second-generation topological charge 4 VVC on the actively corrected High Contrast Imaging Testbed (HCIT) at the Jet Propulsion Laboratory (JPL). New VVC contrast records have been established.", "date": "2011-09-15", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 81511D", "id_number": "CaltechAUTHORS:20150526-083004235", "isbn": "978-0-81948-761-2", "book_title": "Techniques and Instrumentation for Detection of Exoplanets V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-083004235", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Southern Observatory (ESO)" }, { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.896070", "primary_object": { "basename": "396475.pdf", "url": "https://authors.library.caltech.edu/records/wvssm-dv736/files/396475.pdf" }, "resource_type": "book_section", "pub_year": "2011", "author_list": "Mawet, Dimitri; Serabyn, Eugene; et el." }, { "id": "https://authors.library.caltech.edu/records/6vt3z-ckz97", "eprint_id": 57799, "eprint_status": "archive", "datestamp": "2023-08-19 08:05:00", "lastmod": "2024-01-13 16:19:59", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Burruss-R", "name": { "family": "Burruss", "given": "Rick" } }, { "id": "Kern-B", "name": { "family": "Kern", "given": "Brian" } }, { "id": "Krist-J-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Kuhnert-A", "name": { "family": "Kuhnert", "given": "Andreas" } }, { "id": "Levine-Marie", "name": { "family": "Levine", "given": "Marie" } }, { "id": "Liewer-K", "name": { "family": "Liewer", "given": "Kurt" } }, { "id": "Mennesson-B", "name": { "family": "Mennensson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Moody-D", "name": { "family": "Moody", "given": "Dwight" } }, { "id": "Niessner-A", "name": { "family": "Niessner", "given": "Albert" } }, { "id": "Park-P", "name": { "family": "Park", "given": "Peggy" } }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John" } }, { "id": "Traub-W-A", "name": { "family": "Traub", "given": "Wesley" } }, { "id": "Wallace-J-C", "name": { "family": "Wallace", "given": "James" } } ] }, "title": "Taking the vector vortex coronagraph to the next level for\n ground- and space-based exoplanet imaging instruments:\n review of technology developments in the USA, Japan, and Europe", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, exoplanets, phase-mask coronagraphy, optical vortex, polarization, liquid\ncrystal polymers, photonics crystals, subwavelength gratings", "note": "\u00a9 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nSeptember 15, 2011.\n\nThis work was carried out at the European Southern Observatory (ESO) site of Vitacura (Santiago, Chile),\nand the Jet Propulsion Laboratory (JPL), California Institute of Technology (Caltech), under contract with the\nNational Aeronautics and Space Administration (NASA).\n\nPublished - 396478.pdf
", "abstract": "The Vector Vortex Coronagraph (VVC) is one of the most attractive new-generation coronagraphs for ground- and space-based exoplanet imaging/characterization instruments, as recently demonstrated on sky at Palomar and in the laboratory at JPL, and Hokkaido University. Manufacturing technologies for devices covering wavelength ranges from the optical to the mid-infrared, have been maturing quickly. We will review the current status of technology developments supported by NASA in the USA (Jet Propulsion Laboratory-California Institute of Technology, University of Arizona, JDSU and BEAMCo), Europe (University of Li`ege, Observatoire de Paris- Meudon, University of Uppsala) and Japan (Hokkaido University, and Photonics Lattice Inc.), using liquid crystal polymers, subwavelength gratings, and photonics crystals, respectively. We will then browse concrete perspectives for the use of the VVC on upcoming ground-based facilities with or without (extreme) adaptive optics, extremely large ground-based telescopes, and space-based internal coronagraphs.", "date": "2011-09-15", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 815108", "id_number": "CaltechAUTHORS:20150526-091421279", "isbn": "978-0-81948-761-2", "book_title": "Techniques and Instrumentation for Detection of Exoplanets V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-091421279", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Southern Observatory (ESO)" }, { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.896059", "primary_object": { "basename": "396478.pdf", "url": "https://authors.library.caltech.edu/records/6vt3z-ckz97/files/396478.pdf" }, "resource_type": "book_section", "pub_year": "2011", "author_list": "Mawet, Dimitri; Serabyn, Eugene; et el." }, { "id": "https://authors.library.caltech.edu/records/grnd4-vsb87", "eprint_id": 57789, "eprint_status": "archive", "datestamp": "2023-08-19 08:04:37", "lastmod": "2024-01-13 16:19:49", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Bryden-G", "name": { "family": "Bryden", "given": "Geoffrey" } }, { "id": "Traub-W-A", "name": { "family": "Traub", "given": "Wesley" } }, { "id": "Roberts-L-C-Jr", "name": { "family": "Roberts", "given": "Lewis C., Jr." }, "orcid": "0000-0003-3892-2900" }, { "id": "Bruno-R", "name": { "family": "Bruno", "given": "Robin" } }, { "id": "Unwin-S-C", "name": { "family": "Unwin", "given": "Stephen" } }, { "id": "Backovsky-S", "name": { "family": "Backovsky", "given": "Stan" } }, { "id": "Brugarolas-P-B", "name": { "family": "Brugarolas", "given": "Paul" } }, { "id": "Charkrabarti-S", "name": { "family": "Chakrabarti", "given": "Supriya" } }, { "id": "Chen-Pin", "name": { "family": "Chen", "given": "Pin" } }, { "id": "Hillenbrand-L-A", "name": { "family": "Hillenbrand", "given": "Lynne" } }, { "id": "Krist-J-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Lillie-C-F", "name": { "family": "Lillie", "given": "Charles" } }, { "id": "Macintosh-B-A", "name": { "family": "Macintosh", "given": "Bruce" }, "orcid": "0000-0003-1212-7538" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Moody-D-C", "name": { "family": "Moody", "given": "Dwight" } }, { "id": "Rahman-Z", "name": { "family": "Rahman", "given": "Zahidul" } }, { "id": "Rey-J", "name": { "family": "Rey", "given": "Justin" } }, { "id": "Stapelfeldt-K-R", "name": { "family": "Stapelfeldt", "given": "Karl" }, "orcid": "0000-0002-2805-7338" }, { "id": "Stuchlik-D", "name": { "family": "Stuchlik", "given": "David" } }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John" } }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" } ] }, "title": "Zodiac II: Debris Disk Science from a Balloon", "ispublished": "unpub", "full_text_status": "public", "keywords": "Suborbital, Coronagraph, Disks, Exoplanets", "note": "\u00a9 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). Date Published: 15 September 2011. \n\nSome of the research described in this publication was carried out at the Jet Propulsion Laboratory, California\nInstitute of Technology, under a contract with the National Aeronautics and Space Administration.\n\nPublished - 396474.pdf
", "abstract": "Zodiac II is a proposed balloon-borne science investigation of debris disks around nearby stars. Debris disks are analogs of the Asteroid Belt (mainly rocky) and Kuiper Belt (mainly icy) in our Solar System. Zodiac II will measure the size, shape, brightness, and color of a statistically significant sample of disks. These measurements will enable us to probe these fundamental questions: what do debris disks tell us about the evolution of planetary systems; how are debris disks produced; how are debris disks shaped by planets; what materials are debris disks made of; how much dust do debris disks make as they grind down; and how long do debris disks live? In addition, Zodiac II will observe hot, young exoplanets as targets of opportunity. The Zodiac II instrument is a 1.1-m diameter SiC telescope and an imaging coronagraph on a gondola carried by a stratospheric balloon. Its data product is a set of images of each targeted debris disk in four broad visiblewavelength bands. Zodiac II will address its science questions by taking high-resolution, multi-wavelength images of the debris disks around tens of nearby stars. Mid-latitude flights are considered: overnight test flights within the United States followed by half-global flights in the Southern Hemisphere. These longer flights are required to fully explore the set of known debris disks accessible only to Zodiac II. On these targets, it will be 100 times more sensitive than the Hubble Space Telescope's Advanced Camera for Surveys (HST/ACS); no existing telescope can match the Zodiac II contrast and resolution performance. A second objective of Zodiac II is to use the near-space environment to raise the Technology Readiness Level (TRL) of SiC mirrors, internal coronagraphs, deformable mirrors, and wavefront sensing and control, all potentially needed for a future space-based telescope for high-contrast exoplanet imaging.", "date": "2011-09-15", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 81511E", "id_number": "CaltechAUTHORS:20150526-075815173", "isbn": "978-0-81948-761-2", "book_title": "Techniques and Instrumentation for Detection of Exoplanets V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-075815173", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.899688", "primary_object": { "basename": "396474.pdf", "url": "https://authors.library.caltech.edu/records/grnd4-vsb87/files/396474.pdf" }, "resource_type": "book_section", "pub_year": "2011", "author_list": "Bryden, Geoffrey; Traub, Wesley; et el." }, { "id": "https://authors.library.caltech.edu/records/zemb8-hsp10", "eprint_id": 57725, "eprint_status": "archive", "datestamp": "2023-08-19 08:03:17", "lastmod": "2024-01-13 16:19:05", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Liewer-K", "name": { "family": "Liewer", "given": "K." } }, { "id": "Martin-S-R", "name": { "family": "Martin", "given": "S. R." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Ksendzov-A", "name": { "family": "Ksendzov", "given": "A." } } ] }, "title": "Fiber-Based Interferometry and Imaging", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2011 SPIE.\n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.\n\nPublished - 396480.pdf
", "abstract": "Single-mode optical fibers are playing an increasing role in astronomical interferometry, e.g., in high-accuracy visibility measurements and in nulling interferometry. However, such observing modes typically involve only small numbers of fibers. On the other hand, some recently proposed observing techniques call for arrays of single mode fibers coupled to arrays of sub-apertures within a large telescope pupil. The concepts include pupil-masked visibility measurements (non-redundant masking), pupil-sheared nulling interferometry, and coronagraphic imaging using a fiber-linked phased-array of small optical telescopes. The latter arrangement may also be relevant to optical communications. Here we provide an overview of a number of recent novel applications of single-mode fibers and single-mode fiber arrays.", "date": "2011-09-14", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 81460I", "id_number": "CaltechAUTHORS:20150520-152552517", "isbn": "978-0-8194-8756-8", "book_title": "UV/Optical/IR Space Telescopes and Instruments - Innovative Technologies and Concepts V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-152552517", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Breckinridge-J-B", "name": { "family": "Breckinridge", "given": "James B." } } ] }, "doi": "10.1117/12.895268", "primary_object": { "basename": "396480.pdf", "url": "https://authors.library.caltech.edu/records/zemb8-hsp10/files/396480.pdf" }, "resource_type": "book_section", "pub_year": "2011", "author_list": "Serabyn, E.; Liewer, K.; et el." }, { "id": "https://authors.library.caltech.edu/records/4qnd1-f7t54", "eprint_id": 57800, "eprint_status": "archive", "datestamp": "2023-08-19 08:03:23", "lastmod": "2024-01-13 16:20:00", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. K." } }, { "id": "Liewer-K", "name": { "family": "Liewer", "given": "K." } }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "J." } }, { "id": "Moody-D", "name": { "family": "Moody", "given": "D." } }, { "id": "Kern-B", "name": { "family": "Kern", "given": "B." } } ] }, "title": "Recent Progress in Vector Vortex Coronagraphy", "ispublished": "unpub", "full_text_status": "public", "keywords": "vortex, coronagraphy, exoplanets", "note": "\u00a9 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). September 14, 2011.\n\nThis work was carried out at the Jet Propulsion Laboratory (JPL), California Institute of Technology (Caltech), under\ncontract with the National Aeronautics and Space Administration (NASA).\n\nPublished - 396479.pdf
", "abstract": "The optical vortex coronagraph has great potential for enabling high-contrast observations very close to bright stars, and thus for reducing the size of space telescopes needed for exoplanet characterization missions. Here we discuss several recent developments in optical vortex coronagraphy. In particular, we describe multi-stage vortex configurations that allow the use of on-axis telescopes for high-contrast coronagraphy, and also enable the direct measurement of the amplitudes and phases of focal plane speckles. We also briefly describe recent laboratory demonstrations of the optical properties of the dual-stage vortex, and of the broadband performance of single stage vortex masks. Indeed, the demonstrated performance of the vector vortex phase masks already in hand, \u2248 10^(-8), is approximately that needed for an initial coronagraphic mission, such as an exoplanet explorer, aimed at detecting exozodiacal light and jovian exoplanets.", "date": "2011-09-14", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 81460L", "id_number": "CaltechAUTHORS:20150526-093241463", "isbn": "978-0-8194-8756-8", "book_title": "UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-093241463", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Breckinridge-J-B", "name": { "family": "Breckinridge", "given": "James B." } } ] }, "doi": "10.1117/12.895267", "primary_object": { "basename": "396479.pdf", "url": "https://authors.library.caltech.edu/records/4qnd1-f7t54/files/396479.pdf" }, "resource_type": "book_section", "pub_year": "2011", "author_list": "Serabyn, E.; Mawet, D.; et el." }, { "id": "https://authors.library.caltech.edu/records/mcbb7-ry711", "eprint_id": 57730, "eprint_status": "archive", "datestamp": "2023-08-19 05:01:06", "lastmod": "2024-01-13 16:19:07", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Burruss-R", "name": { "family": "Burruss", "given": "Rick" } } ] }, "title": "Imaging faint companions very close to stars", "ispublished": "unpub", "full_text_status": "public", "keywords": "instrumentation: adaptive optics, planetary systems, binaries (including multiple): close", "note": "\u00a9 2010 International Astronomical Union.\n\nPublished - 2011IAUS__276__551S.pdf
", "abstract": "A vortex coronagraph on our extreme adaptive optics \"well-corrected subaperture\" on the Hale telescope has recently allowed the imaging of the triple-planet HR8799 system with\na 1.5 m subaperture. Moreover, a faint, low-mass companion to a second star was imaged only one diffraction beam width away from the primary. These results illustrate the potential of the vortex coronagraph, which can enable exoplanet imaging and characterization with smaller\ntelescopes than previously thought.", "date": "2011", "date_type": "published", "publisher": "Cambridge University Press", "place_of_pub": "Cambridge, MA", "pagerange": "551-552", "id_number": "CaltechAUTHORS:20150521-081510782", "isbn": "978-0-521-19652-9", "book_title": "The Astrophysics of Planetary Systems: Formation, Structure, and Dynamical Evolution", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-081510782", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Sozzetti-A", "name": { "family": "Sozzetti", "given": "A." } }, { "id": "Lattanzi-M-G", "name": { "family": "Lattanzi", "given": "M. G." } }, { "id": "Boss-A-P", "name": { "family": "Boss", "given": "A. P." } } ] }, "doi": "10.1017/S1743921311021181", "primary_object": { "basename": "2011IAUS__276__551S.pdf", "url": "https://authors.library.caltech.edu/records/mcbb7-ry711/files/2011IAUS__276__551S.pdf" }, "resource_type": "book_section", "pub_year": "2011", "author_list": "Serabyn, Eugene; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.edu/records/6p1rg-fgc83", "eprint_id": 57827, "eprint_status": "archive", "datestamp": "2023-08-19 03:30:36", "lastmod": "2024-01-13 16:20:21", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "C." } }, { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "P." } }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "M." }, "orcid": "0000-0002-2011-0851" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Lenaerts-C", "name": { "family": "Lenaerts", "given": "C." } }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } }, { "id": "Hanot-C", "name": { "family": "Hanot", "given": "C." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "A." }, "orcid": "0000-0001-9353-2724" }, { "id": "Baudrand-J", "name": { "family": "Baudrand", "given": "J." } } ] }, "title": "Annular Groove Phase Mask coronagraph in diamond for mid-IR\n wavelengths: manufacturing assessment and performance analysis", "ispublished": "unpub", "full_text_status": "public", "keywords": "coronagraphy, annular groove phase mask, vector vortex, achromaticity, ZOGs, subwavelength gratings", "note": "\u00a9 2010 Society of Photo-Optical Instrumentation Engineers (SPIE). August 10, 2010.\n\nWe gratefully acknowledge the help of Prof. Markku Kuittinen, Ismo Vartianen and Kari Leinonen (University of\nJoensuu, Finland) with lithography. C. Delacroix acknowledges the financial support of the Belgian \"Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture\". The authors from the Li\u00e8ge University acknowledge support from the Communaut\u00e9 fran\u00e7aise de Belgique - Actions de recherche concert\u00e9e - Acad\u00e9mie universitaire Wallonie-Europe.\n\nPublished - 396488.pdf
Submitted - 1412.0395.pdf
", "abstract": "Phase-mask coronagraphs are known to provide high contrast imaging capabilities while preserving a small inner working angle, which allows searching for exoplanets or circumstellar disks with smaller telescopes or at longer wavelengths. The AGPM (Annular Groove Phase Mask, Mawet et al. 2005) is an optical vectorial vortex coronagraph (or vector vortex) induced by a rotationally symmetric subwavelength grating (i.e. with a period smaller than \u03bb/n, \u03bb being the observed wavelength and n the refractive index of the grating substrate). In this paper, we present our first midinfrared AGPM prototypes imprinted on a diamond substrate. We firstly give an extrapolation of the expected coronagraph performances in the N-band (~10 \u03bcm), and prospects for down-scaling the technology to the most wanted L-band (~3.5 \u03bcm). We then present the manufacturing and measurement results, using diamond-optimized microfabrication techniques such as nano-imprint lithography (NIL) and reactive ion etching (RIE). Finally, the subwavelength grating profile metrology combines surface metrology (scanning electron microscopy, atomic force microscopy, white light interferometry) with diffractometry on an optical polarimetric bench and cross correlation with theoretical simulations using rigorous coupled wave analysis (RCWA).", "date": "2010-08-10", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 77314W", "id_number": "CaltechAUTHORS:20150526-150116703", "isbn": "978-0-81948-221-1", "book_title": "Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-150116703", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture (FRIA)" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique - Actions de recherche concert\u00e9e - Acad\u00e9mie universitaire Wallonie-Europe" } ] }, "contributors": { "items": [ { "id": "Oschmann-J-M-Jr", "name": { "family": "Oschmann", "given": "Jacobus M., Jr." } }, { "id": "Clampin-M-C", "name": { "family": "Clampin", "given": "Mark C." } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } } ] }, "doi": "10.1117/12.858278", "primary_object": { "basename": "1412.0395.pdf", "url": "https://authors.library.caltech.edu/records/6p1rg-fgc83/files/1412.0395.pdf" }, "related_objects": [ { "basename": "396488.pdf", "url": "https://authors.library.caltech.edu/records/6p1rg-fgc83/files/396488.pdf" } ], "resource_type": "book_section", "pub_year": "2010", "author_list": "Delacroix, C.; Forsberg, P.; et el." }, { "id": "https://authors.library.caltech.edu/records/d0612-ycj19", "eprint_id": 57801, "eprint_status": "archive", "datestamp": "2023-08-19 03:30:01", "lastmod": "2024-01-13 16:20:02", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Burruss-R", "name": { "family": "Burruss", "given": "R." } } ] }, "title": "The Potential of Small Space Telescopes for Exoplanet Observations", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2010 SPIE.\n\nThe research described herein was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under\ncontract with NASA.\n\nPublished - 396489.pdf
", "abstract": "The imaging of faint exoplanets near bright stars requires the development of very high contrast detection techniques, including both precise wavefront control and deep starlight rejection. A system-level proof-of-principle experiment carried out at at the Palomar Observatory has recently demonstrated that exoplanets can be detected very near stars even with a fairly small (1.5 m diameter) telescope aperture, such as someday might be used by a first space-based exoplanet imaging mission. Using fine-scale wavefront correction across this small aperture, together with fine pointing and focus control, pre- and post-detection speckle reduction, and a vector vortex coronagraph, it has been possible to achieve extremely good starlight rejection within a small number of diffractions beams of the stellar position. This performance has recently allowed the imaging of the three HR8799 planets and the HD32297 disk, thus providing a first system-level validation of the steps needed to achieve high-contrast observations at very small angles. These results thus serve to highlight the potential of small space telescopes aiming at high-contrast exoplanet observations. Specifically, a small-angle coronagraph enables the use of smaller telescopes, thus potentially reducing mission cost significantly.", "date": "2010-08-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 77312O", "id_number": "CaltechAUTHORS:20150526-094336246", "isbn": "978-0-81948-221-1", "book_title": "Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-094336246", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "collection": "CaltechAUTHORS", "contributors": { "items": [ { "id": "Oschmann-J-M-Jr", "name": { "family": "Oschmann", "given": "Jacobus M., Jr." } }, { "id": "Clampin-M-C", "name": { "family": "Clampin", "given": "Mark C." } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } } ] }, "doi": "10.1117/12.869683", "primary_object": { "basename": "396489.pdf", "url": "https://authors.library.caltech.edu/records/d0612-ycj19/files/396489.pdf" }, "resource_type": "book_section", "pub_year": "2010", "author_list": "Serabyn, E.; Mawet, D.; et el." }, { "id": "https://authors.library.caltech.edu/records/z3vkm-3pm36", "eprint_id": 57828, "eprint_status": "archive", "datestamp": "2023-08-19 03:29:33", "lastmod": "2024-01-13 16:20:23", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John" } }, { "id": "Stapelfeldt-K-R", "name": { "family": "Stapelfeldt", "given": "Karl" }, "orcid": "0000-0002-2805-7338" }, { "id": "Traub-W-A", "name": { "family": "Traub", "given": "Wesley" } }, { "id": "Krist-J-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Moody-D-C", "name": { "family": "Moody", "given": "Dwight" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Henry-C", "name": { "family": "Henry", "given": "Curt" } }, { "id": "Brugarolas-P-B", "name": { "family": "Brugarolas", "given": "Paul" } }, { "id": "Alexander-J", "name": { "family": "Alexander", "given": "James" } }, { "id": "Gappinger-R", "name": { "family": "Gappinger", "given": "Robert" } }, { "id": "Dawson-O", "name": { "family": "Dawson", "given": "Olivia" } }, { "id": "Mireles-V", "name": { "family": "Mireles", "given": "VIrgil" } }, { "id": "Park-Peggy", "name": { "family": "Park", "given": "Peggy" } }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "title": "ACCESS \u2013 A Concept Study for the Direct Imaging and Spectroscopy of Exoplanetary Systems", "ispublished": "unpub", "full_text_status": "public", "keywords": "coronagraphs, exoplanets, space astronomy, active optics", "note": "\u00a9 2010 Society of Photo-Optical Instrumentation Engineers (SPIE). August 06, 2010. \n\nThe research described in this paper was carried out at the Jet Propulsion Laboratory, California Institute of Technology,\nunder a contract with the National Aeronautics and Space Administration.\n\nPublished - 396490.pdf
", "abstract": "ACCESS is one of four medium-class mission concepts selected for study in 2008-9 by NASA's Astrophysics Strategic Mission Concepts Study program. ACCESS evaluates a space observatory designed for extreme high-contrast imaging and spectroscopy of exoplanetary systems. An actively-corrected coronagraph is used to suppress the glare of diffracted and scattered starlight to contrast levels required for exoplanet imaging. The ACCESS study considered the relative merits and readiness of four major coronagraph types, and modeled their performance with a NASA medium-class space telescope. The ACCESS study asks: What is the most capable medium-class coronagraphic mission that is possible with telescope, instrument, and spacecraft technologies available today? Using demonstrated high-TRL technologies, the ACCESS science program surveys the nearest 120+ AFGK stars for exoplanet systems, and surveys the majority of those for exozodiacal dust to the level of 1 zodi at 3 AU. Coronagraph technology developments in the coming year are expected to further enhance the science reach of the ACCESS mission concept.", "date": "2010-08-06", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 773128", "id_number": "CaltechAUTHORS:20150526-152227788", "isbn": "978-0-81948-221-1", "book_title": "Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-152227788", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Oschmann-J-M-Jr", "name": { "family": "Oschmann", "given": "Jacobus M., Jr." } }, { "id": "Clampin-M-C", "name": { "family": "Clampin", "given": "Mark C." } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } } ] }, "doi": "10.1117/12.858301", "primary_object": { "basename": "396490.pdf", "url": "https://authors.library.caltech.edu/records/z3vkm-3pm36/files/396490.pdf" }, "resource_type": "book_section", "pub_year": "2010", "author_list": "Trauger, John; Stapelfeldt, Karl; et el." }, { "id": "https://authors.library.caltech.edu/records/zmt8f-ejt60", "eprint_id": 57809, "eprint_status": "archive", "datestamp": "2023-08-19 03:19:21", "lastmod": "2024-01-13 16:20:09", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Burruss-R-S", "name": { "family": "Burruss", "given": "Rick S." } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri P." }, "orcid": "0000-0002-8895-4735" }, { "id": "Roberts-J-E", "name": { "family": "Roberts", "given": "Jennifer E." } }, { "id": "Hickey-J-P", "name": { "family": "Hickey", "given": "Jeffrey P." }, "orcid": "0000-0002-6944-3964" }, { "id": "Rykoski-K-M", "name": { "family": "Rykoski", "given": "Kevin" } }, { "id": "Bikkannavar-S", "name": { "family": "Bikkannavar", "given": "Siddarayappa" } }, { "id": "Crepp-J-R", "name": { "family": "Crepp", "given": "Justin R." }, "orcid": "0000-0003-0800-0593" } ] }, "title": "Demonstration of on sky contrast improvement using the Modified Gerchberg-Saxton algorithm at the Palomar Observatory", "ispublished": "unpub", "full_text_status": "public", "keywords": "phase retrieval, mgs, high contrast coronagraphy, wavefront sensing, adaptive optics, HR8799", "note": "\u00a9 2010 Society of Photo-Optical Instrumentation Engineers (SPIE). July 28, 2010.\n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the\nNational Aeronautics and Space Administration, and is based on observations obtained at the Hale Telescope, Palomar\nObservatory, as part of a continuing collaboration between the California Institute of Technology, NASA/JPL, and\nCornell University. We thank the staff of the Palomar Observatory and the Palomar Adaptive Optics team for their\ncontinued support.\n\nReference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not constitute or imply its endorsement by the United States Government or the Jet Propulsion\nLaboratory, California Institute of Technology.\n\nPublished - 396483.pdf
", "abstract": "We have successfully demonstrated significant improvements in the high contrast detection limit of the Well-Corrected Subaperture (WCS) using a number of steps aimed at reducing non-common path (NCP) wavefront errors, including the Autonomous Phase Retrieval Calibration (APRC) software package developed at the Jet Propulsion Laboratory (JPL) for the Palomar adaptive optics instrument (PALAO). APRC utilizes the Modified Gerchberg-Saxton (MGS) wavefront sensing algorithm, also developed at JPL. The WCS delivers such excellent correction of the atmosphere that NCP wavefront errors not sensed by PALAO but present at the coronagraphic image plane begin to factor heavily as a limit to contrast. The APRC program was implemented to reduce these NCP wavefront errors from 110 nm to 35 nm (rms) in the lab, and now these exceptional results have been extended to targets on the sky for the first time, leading to a significant suppression of speckle noise. Consequently we now report a contrast level of very nearly 1\u00d710^(-4) at separations of 2\u03bb/D before the data is post processed, and 1\u00d710^(-5) after post processing. We describe here the major components of our instrument, the work done to improve the NCP wavefront errors, and the ensuing excellent on sky results, including the detection of the three exoplanets orbiting the star HR8799.", "date": "2010-07-28", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 77365X", "id_number": "CaltechAUTHORS:20150526-122147958", "isbn": "978-0-8194-8226-6", "book_title": "Adaptive Optics Systems II", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-122147958", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "Cornell University" } ] }, "contributors": { "items": [ { "id": "Ellerbroek-B-L", "name": { "family": "Ellenbroeck", "given": "Brent L." } }, { "id": "Hart-M", "name": { "family": "Hart", "given": "Michael" } }, { "id": "Hubin-N", "name": { "family": "Hubin", "given": "Norbert" } }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "Peter L." } } ] }, "doi": "10.1117/12.857544", "primary_object": { "basename": "396483.pdf", "url": "https://authors.library.caltech.edu/records/zmt8f-ejt60/files/396483.pdf" }, "resource_type": "book_section", "pub_year": "2010", "author_list": "Burruss, Rick S.; Serabyn, Eugene; et el." }, { "id": "https://authors.library.caltech.edu/records/ve4bt-9zm25", "eprint_id": 57818, "eprint_status": "archive", "datestamp": "2023-08-19 03:16:39", "lastmod": "2024-01-13 16:20:15", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hanot-C", "name": { "family": "Hanot", "given": "Charles" } }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "Pierre" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "Serge" } } ] }, "title": "Development of a CELestial Infrared Nuller Experiment\n (CELINE) for broadband nulling and new single-mode fiber\n testing", "ispublished": "unpub", "full_text_status": "public", "keywords": "Nulling interferometry, Nulling coronagraphy, single-mode fibers, Achromatic phase shifters, Exoplanets", "note": "\u00a9 2010 Society of Photo-Optical Instrumentation Engineers (SPIE). July 21, 2010. \n\nThe research was supported by the Fond National de la Recherche scientifique de Belgique (FNRS), by the Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture de Belgique (FRIA) and by the Communaut\u00e9 Francaise de Belgique - Action de recherche concert\u00e9e - Acad\u00e9mie Wallonie - Europe. The authors acknowledge Jacques Baudrand (LESIA) and ESA for generously lending us respectively achromatic halfwave plates and Fresnel rhombs.\n\nPublished - 396486.pdf
", "abstract": "The small angular distance (<100 mas) and the huge flux ratio (10^7) between an Earth-like exoplanet in the socalled habitable zone and its host star makes it very difficult to direct image such systems. Nulling interferometry consists of a very powerful technique that combines destructively the light from two or more collectors to dim the starlight and to reveal faint companions in its vicinity. We have developed a new nulling experiment based on the fiber nuller principle. This fully symmetric reflective nulling bench aims at testing broadband nulling in both H and K bands as well as characterizing photonic fibers for modal filtering. We present in this paper the design, the development as well as preliminary results of the experiment.", "date": "2010-07-21", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 77342L", "id_number": "CaltechAUTHORS:20150526-133834577", "isbn": "978-0-8194-8224-2", "book_title": "Optical and Infrared Interferometry II", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-133834577", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fond National de la Recherche scientifique de Belgique (FNRS)" }, { "agency": "Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture de Belgique (FRIA)" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Action de recherche concert\u00e9e \u2013 Acad\u00e9mie Wallonie-Europe" } ] }, "contributors": { "items": [ { "id": "Danchi-W-C", "name": { "family": "Danchi", "given": "William C." } }, { "id": "Delplancke-F", "name": { "family": "Delplancke", "given": "Fran\u00e7oise" } }, { "id": "Rajagopal-J-K", "name": { "family": "Rajagopal", "given": "Jayadev K." } } ] }, "doi": "10.1117/12.856843", "primary_object": { "basename": "396486.pdf", "url": "https://authors.library.caltech.edu/records/ve4bt-9zm25/files/396486.pdf" }, "resource_type": "book_section", "pub_year": "2010", "author_list": "Hanot, Charles; Riaud, Pierre; et el." }, { "id": "https://authors.library.caltech.edu/records/y7ccp-tc246", "eprint_id": 57812, "eprint_status": "archive", "datestamp": "2023-08-19 03:16:34", "lastmod": "2024-01-13 16:20:13", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hanot-C", "name": { "family": "Hanot", "given": "Charles" } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Martin-S-R", "name": { "family": "Martin", "given": "Stefan" } }, { "id": "Liewer-K", "name": { "family": "Liewer", "given": "Kurt" } }, { "id": "Loya-F", "name": { "family": "Loya", "given": "Frank" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "Pierre" } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" } ] }, "title": "Development of a statistical reduction method for the\n Palomar Fiber Nuller", "ispublished": "unpub", "full_text_status": "public", "keywords": "Statistics, Nulling interferometry, Coronagraphy, stellar diameters", "note": "\u00a9 2010 Society of Photo-Optical Instrumentation Engineers (SPIE). July 21, 2010.\n\nThis work was carried out at the Jet propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. The research was supported by the Fond National de la Recherche scientifique de Belgique (FNRS), by the Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture de Belgique (FRIA) and by the Communaut\u00e9 Francaise de Belgique - Action de recherche concert\u00e9e - Acad\u00e9mie Wallonie - Europe and by the Center for Exoplanet Science.\n\nPublished - 396485.pdf
", "abstract": "A unique statistical data analysis method has been developed for reducing nulling interferometry data. The idea is to make use of the statistical distributions of the fluctuating null depths and beam intensities to retrieve the astrophysical null depth in the presence of fluctuations. The approach yields an accuracy much better than is possible with standard data reduction methods, because the accuracy of the null depth is not limited by the sizes of the phase and intensity errors but by the uncertainties on their statistical distributions. The result is an improvement in the instrumental null depth measurement limit of roughly an order of magnitude. We show in this paper that broadband null depths of 10^(-4) can be measured in the lab with our infrared Fiber Nuller without achromatic phase shifters. On sky results are also dramatically improved, with measured contrasts up to a couple of 10^(-4) with our instrument mounted on the Hale telescope at the Palomar Observatory. This statistical analysis is not specific to our instrument and may be applicable to other interferometers.", "date": "2010-07-21", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 77342S", "id_number": "CaltechAUTHORS:20150526-130111425", "isbn": "978-0-8194-8224-2", "book_title": "Optical and Infrared Interferometry II", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-130111425", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "Fond National de la Recherche scientifique de Belgique (FNRS)" }, { "agency": "Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture de Belgique (FRIA)" }, { "agency": "Communaut\u00e9 Francaise de Belgique-Action de recherche concert\u00e9e-Acad\u00e9mie Wallonie-Europe" }, { "agency": "Center for Exoplanet Science" } ] }, "contributors": { "items": [ { "id": "Danchi-W-C", "name": { "family": "Danchi", "given": "William C." } }, { "id": "Delplancke-F", "name": { "family": "Delplancke", "given": "Fran\u00e7oise" } }, { "id": "Rajagopal-J-K", "name": { "family": "Rajagopal", "given": "Jayadev K." } } ] }, "doi": "10.1117/12.857014", "primary_object": { "basename": "396485.pdf", "url": "https://authors.library.caltech.edu/records/y7ccp-tc246/files/396485.pdf" }, "resource_type": "book_section", "pub_year": "2010", "author_list": "Hanot, Charles; Mennesson, Bertrand; et el." }, { "id": "https://authors.library.caltech.edu/records/k4f9z-5ff24", "eprint_id": 57822, "eprint_status": "archive", "datestamp": "2023-08-19 03:16:45", "lastmod": "2024-01-13 16:20:17", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "B." }, "orcid": "0000-0003-4205-4800" }, { "id": "Martin-S", "name": { "family": "Martin", "given": "S." } }, { "id": "Liewer-K", "name": { "family": "Liewer", "given": "K." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Hanot-C", "name": { "family": "Hanot", "given": "C." } }, { "id": "Loya-F", "name": { "family": "Loya", "given": "F." } }, { "id": "Colavita-M-M", "name": { "family": "Colavita", "given": "M. M." } }, { "id": "Ragland-S", "name": { "family": "Ragland", "given": "S." } } ] }, "title": "The Potential of Rotating-Baseline Nulling Interferometers Operating within Large Single-Telescope Apertures", "ispublished": "unpub", "full_text_status": "public", "keywords": "nulling interferometry", "note": "\u00a9 2010 Society of Photo-Optical Instrumentation Engineers (SPIE). July 21, 2010.\n\nWe thank the staffs of the Palomar and Keck Observatories for assistance with instrumental setups and with the observations. The research described herein was carried out in large part at the Jet Propulsion Laboratory, California\nInstitute of Technology, under contract with NASA.\n\nPublished - 396487.pdf
", "abstract": "The use of a rotating-baseline nulling interferometer for exoplanet detection was proposed several decades ago, but the technique has not yet been fully demonstrated in practice. Here we consider the faint companion and exozodiacal disk detection capabilities of rotating-baseline nulling interferometers, such as are envisioned for space-based infrared nullers, but operating instead within the aperture of large single telescopes. In particular, a nulling interferometer on a large aperture corrected by a next-generation extreme adaptive optics system can provide deep interferometric contrasts, and also reach smaller angles (sub \u03bb/D) than classical coronagraphs. Such rotating nullers also provide validation for an eventual space-based rotating-baseline nulling interferometer. As practical examples, we describe ongoing experiments with rotating nullers at Palomar and Keck, and consider briefly the case of the Thirty Meter Telescope.", "date": "2010-07-21", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 77341E", "id_number": "CaltechAUTHORS:20150526-135350900", "isbn": "978-0-8194-8224-2", "book_title": "Optical and Infrared Interferometry II", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-135350900", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Danchi-W-C", "name": { "family": "Danchi", "given": "William C." } }, { "id": "Delplancke-F", "name": { "family": "Delplancke", "given": "Fran\u00e7oise" } }, { "id": "Rajagopal-J-K", "name": { "family": "Rajagopal", "given": "Jayadev K." } } ] }, "doi": "10.1117/12.857753", "primary_object": { "basename": "396487.pdf", "url": "https://authors.library.caltech.edu/records/k4f9z-5ff24/files/396487.pdf" }, "resource_type": "book_section", "pub_year": "2010", "author_list": "Serabyn, E.; Mennesson, B.; et el." }, { "id": "https://authors.library.caltech.edu/records/g4gfn-ckb08", "eprint_id": 57802, "eprint_status": "archive", "datestamp": "2023-08-19 03:14:30", "lastmod": "2024-01-13 16:20:05", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Moody-D-C", "name": { "family": "Moody", "given": "Dwight" } }, { "id": "Krist-J-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } } ] }, "title": "The Vector Vortex Coronagraph: sensitivity to central\n obscuration, low-order aberrations, chromaticism,\n and polarization", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, exoplanets, phase-mask coronagraphy, optical vortex, adaptive optics, wave-front control, small and large space-based telescopes, large and extremely large ground-based telescopes.", "note": "\u00a9 2010 Society of Photo-Optical Instrumentation Engineers (SPIE). July 19, 2010.\n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA).\n\nPublished - 396482.pdf
", "abstract": "The Vector Vortex Coronagraph is a phase-based coronagraph, one of the most efficient in terms of inner working angle, throughput, discovery space, contrast, and simplicity. Using liquid-crystal polymer technology, this new coronagraph has recently been the subject of lab demonstrations in the near-infrared, visible and was also used on sky at the Palomar observatory in the H and K bands (1.65 and 2.2 \u03bcm, respectively) to image the brown dwarf companion to HR 7672, and the three extra-solar planets around HR 8799. However, despite these recent successes, the Vector Vortex Coronagraph is, as are most coronagraphs, sensitive to the central obscuration and secondary support structures, low-order aberrations (tip-tilt, focus, etc), bandwidth (chromaticism), and polarization when image-plane wavefront sensing is performed. Here, we consider in detail these sensitivities as a function of the topological charge of the vortex and design features inherent to the manufacturing technology, and show that in practice all of them can be mitigated to meet specific needs.", "date": "2010-07-19", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 773914", "id_number": "CaltechAUTHORS:20150526-095007327", "isbn": "978-0-81948-229-7", "book_title": "Modern Technologies in Space- and Ground-based Telescopes and Instrumentation", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-095007327", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Atad-Ettedgui-E", "name": { "family": "Atad-Ettedgui", "given": "Eli" } }, { "id": "Lemke-D", "name": { "family": "Lemke", "given": "Dietrich" } } ] }, "doi": "10.1117/12.858240", "primary_object": { "basename": "396482.pdf", "url": "https://authors.library.caltech.edu/records/g4gfn-ckb08/files/396482.pdf" }, "resource_type": "book_section", "pub_year": "2010", "author_list": "Mawet, Dimitri; Pueyo, Laurent; et el." }, { "id": "https://authors.library.caltech.edu/records/mm5xt-s8w26", "eprint_id": 57810, "eprint_status": "archive", "datestamp": "2023-08-19 03:10:37", "lastmod": "2024-01-13 16:20:11", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "B." }, "orcid": "0000-0003-4205-4800" }, { "id": "Hanot-C", "name": { "family": "Hanot", "given": "C." } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Martin-S-R", "name": { "family": "Martin", "given": "S. R." } }, { "id": "Liewer-K", "name": { "family": "Liewer", "given": "K." } }, { "id": "Loya-F", "name": { "family": "Loya", "given": "F." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "High Contrast Stellar Observations within the Diffraction\n Limit at the Palomar Hale Telescope", "ispublished": "unpub", "full_text_status": "public", "keywords": "infrared: stars - instrumentation: coronagraphs, interferometers - stars: circumstellar matter -\nstars: individual (\u03b1 Boo, Vega, \u03c1 Per)", "note": "\u00a9 2010 Society of Photo-Optical Instrumentation Engineers (SPIE). July 14, 2010.\n\nThis work was performed at the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA. We wish to thank the Palomar Observatory staff for their assistance in mount ing the PFN and conducting the observations at the Hale telescope.\n\nPublished - 396484.pdf
", "abstract": "We report on high-accuracy, high-resolution (< 20mas) stellar measurements obtained in the near infrared (\u2243 2.2 microns) at the Palomar 200 inch telescope using two elliptical (3m x 1.5m) sub-apertures located 3.4m apart. Our interferometric coronagraph, known as the \"Palomar Fiber Nuller\" (PFN), is located downstream of the Palomar adaptive optics (AO) system and recombines the two separate beams into a common singlemode fiber. The AO system acts as a \"fringe tracker\", maintaining the optical path difference (OPD) between the beams around an adjustable value, which is set to the central dark interference fringe. AO correction ensures high efficiency and stable injection of the beams into the single-mode fiber. A chopper wheel and a fast photometer are used to record short (< 50ms per beam) interleaved sequences of background, individual beam and interferometric signals. In order to analyze these chopped null data sequences, we developed a new statistical method, baptized \"Null Self-Calibration\" (NSC), which provides astrophysical null measurements at the 0.001 level, with 1 \u03c3 uncertainties as low as 0.0003. Such accuracy translates into a dynamic range greater than 1000:1 within the diffraction limit, demonstrating that the approach effectively bridges the traditional gap between regular coronagraphs, limited in angular resolution, and long baseline visibility interferometers, whose dynamic range is restricted to \u2243 100:1. As our measurements are extremely sensitive to the brightness distribution very close to the optical axis, we were able to constrain the stellar diameters and amounts of circumstellar emission for a sample of very bright stars. With the improvement expected when the PALM-3000 extreme AO system comes on-line at Palomar, the same instrument now equipped with a state of the art low noise fast read-out near IR camera, will yield 10^(-4) to 10^(-3) contrast as close as 30 mas for stars with K magnitude brighter than 6. Such a system will provide a unique and ideal tool for the detection of young (<100 Myr) self-luminous planets and hot debris disks in the immediate vicinity (0.1 to a few AUs) of nearby (< 50pc) stars.", "date": "2010-07-14", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 773511", "id_number": "CaltechAUTHORS:20150526-123956248", "isbn": "978-0-81948-225-9", "book_title": "Ground-based and Airborne Instrumentation for Astronomy Ill", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-123956248", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "McLean-I-S", "name": { "family": "McLean", "given": "Ian S." } }, { "id": "Ramsay-S-K", "name": { "family": "Ramsay", "given": "Suzanne K." } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.857633", "primary_object": { "basename": "396484.pdf", "url": "https://authors.library.caltech.edu/records/mm5xt-s8w26/files/396484.pdf" }, "resource_type": "book_section", "pub_year": "2010", "author_list": "Mennesson, B.; Hanot, C.; et el." }, { "id": "https://authors.library.caltech.edu/records/p1x7y-ent68", "eprint_id": 57702, "eprint_status": "archive", "datestamp": "2023-08-19 01:10:05", "lastmod": "2024-01-13 16:18:50", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "J." } }, { "id": "Stapelfeldt-K-R", "name": { "family": "Stapelfeldt", "given": "K." }, "orcid": "0000-0002-2805-7338" }, { "id": "Traub-W-A", "name": { "family": "Traub", "given": "W. A." } }, { "id": "Krist-J-E", "name": { "family": "Krist", "given": "J." } }, { "id": "Moody-D-M", "name": { "family": "Moody", "given": "D." } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "L." }, "orcid": "0000-0003-3818-408X" }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "S." } }, { "id": "Henry-Curt", "name": { "family": "Henry", "given": "C." } }, { "id": "Park-Peggy", "name": { "family": "Park", "given": "P." } }, { "id": "Gappinger-R-O", "name": { "family": "Gappinger", "given": "R." } }, { "id": "Brugarolas-P-B", "name": { "family": "Brugarolas", "given": "P." } }, { "id": "Alexander-J", "name": { "family": "Alexander", "given": "J." } }, { "id": "Mireless-V", "name": { "family": "Mireless", "given": "V." } }, { "id": "Dawson-O", "name": { "family": "Dawson", "given": "O." } } ] }, "title": "ACCESS: A Concept Study for the Direct Imaging and Spectroscopy of Exoplanetary Systems", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2010 Astronomical Society of the Pacific. \n\nThe research described in this paper was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.\n\nPublished - 2010ASPC__430__375T.pdf
", "abstract": "ACCESS is one of four medium-class mission concepts selected for study in 2008/9 by NASA's Astrophysics Strategic Mission Concepts Study program. In a nutshell, ACCESS evaluates a space telescope designed for extreme high-contrast imaging and spectroscopy of exoplanetary systems. An actively-corrected coronagraph is used to suppress the glare of diffracted and scattered starlight to the levels required for exoplanet imaging. The ACCESS study asks: What is the most capable medium-class coronagraphic mission that is possible with telescope, instrument, and spacecraft technologies available today?", "date": "2010", "date_type": "published", "publisher": "Astronomical Society of the Pacific", "place_of_pub": "San Francisco, CA", "pagerange": "375-382", "id_number": "CaltechAUTHORS:20150520-102639514", "isbn": "9781583817407", "book_title": "Pathways Towards Habitable Planets", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-102639514", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "collection": "CaltechAUTHORS", "contributors": { "items": [ { "id": "du-Foresto-V-C", "name": { "family": "du Foresto", "given": "Vincent Coud\u00e9" } }, { "id": "Gelino-D-M", "name": { "family": "Gelino", "given": "Dawn M." } }, { "id": "Ribas-I", "name": { "family": "Ribas", "given": "Ignasi" } } ] }, "primary_object": { "basename": "2010ASPC__430__375T.pdf", "url": "https://authors.library.caltech.edu/records/p1x7y-ent68/files/2010ASPC__430__375T.pdf" }, "resource_type": "book_section", "pub_year": "2010", "author_list": "Trauger, J.; Stapelfeldt, K.; et el." }, { "id": "https://authors.library.caltech.edu/records/3v39q-wyk73", "eprint_id": 57894, "eprint_status": "archive", "datestamp": "2023-08-19 01:10:10", "lastmod": "2023-10-23 17:51:14", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Burruss-R", "name": { "family": "Burruss", "given": "Rick" } } ] }, "title": "Detecting exoplanets with high contrast coronagraphy", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2010 Caltech. \n\nThis work was carried out at the Jet Propulsion Laboratory, under contract with NASA. The data presented are based on observations obtained at the Hale Telescope, Palomar Observatory, as part of a continuing collaboration between Caltech, NASA/JPL, and Cornell University. We wish to thank the Palomar Observatory staff for assistance both with our instrumentation and with the observations. Copyright 2010 California Institute of Technology. Government sponsorship acknowledged.\n\nPublished - F-serabyn.pdf
", "abstract": "The first images of exoplanets are now in hand, but the imaging of even fainter planets near bright stars requires the development of very high contrast detection techniques. The two necessary aspects are precise wavefront control and efficient starlight rejection. These essential aspects were recently demonstrated at the Palomar Observatory on a 1.5 m diameter \"well-corrected subaperture\" on the Hale telescope. \"Extreme\" adaptive optics wavefront correction was achieved using fine-scale wavefront correction on the subaperture, combined with phase-retrieval to reduce non-common path errors such as faint speckles. Starlight rejection has been maximized with a novel vector vortex coronagraph, precise tip-tilt and focus control within the coronagraph, and the ``locally optimized combination of images\" speckle calibration algorithm. The Palomar system provides small-angle contrast sensitivities comparable to those of much larger telescopes, allowing the imaging of e.g., the three HR8799 planets and the HD32297 disk. These results provide a first validation of the steps needed to achieve high-contrast in on-sky observations, and illustrate the promise of future ground- and space-based high-contrast instruments.", "date": "2010", "date_type": "published", "publisher": "Caltech Library", "id_number": "CaltechAUTHORS:20150529-081445433", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150529-081445433", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL" } ] }, "collection": "CaltechAUTHORS", "contributors": { "items": [ { "id": "Zapatero-Osorio-M-R", "name": { "family": "Zapatero Osorio", "given": "M. R." } }, { "id": "Gorgas-J", "name": { "family": "Gorgas", "given": "J." } }, { "id": "Ma\u00edz-Apell\u00e1niz-J", "name": { "family": "Ma\u00edz Apell\u00e1niz", "given": "J." } }, { "id": "Pardo-J-R", "name": { "family": "Pardo", "given": "J. R." } }, { "id": "Gil-de-Paz-A", "name": { "family": "Gil de Paz", "given": "A." } } ] }, "primary_object": { "basename": "F-serabyn.pdf", "url": "https://authors.library.caltech.edu/records/3v39q-wyk73/files/F-serabyn.pdf" }, "resource_type": "book_section", "pub_year": "2010", "author_list": "Serabyn, Eugene; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.edu/records/yf511-g1z89", "eprint_id": 57829, "eprint_status": "archive", "datestamp": "2023-08-21 22:06:08", "lastmod": "2024-01-13 16:20:25", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Krist-J-E", "name": { "family": "Krist", "given": "John E." } }, { "id": "Moody-D-C", "name": { "family": "Moody", "given": "Dwight C." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John T." } }, { "id": "Belikov-R", "name": { "family": "Belikov", "given": "Ruslan" } }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Vanderbei-R-J", "name": { "family": "Vanderbei", "given": "Robert J." } } ] }, "title": "End-to-end simulations of different coronagraphic techniques", "ispublished": "unpub", "full_text_status": "public", "keywords": "Simulations; Wavefronts; Apodization; Coronagraphy; Deformable mirrors; Exoplanets; Optical vortices; Planets", "note": "\u00a9 2009 Society of Photo-Optical Instrumentation Engineers (SPIE). August 19, 2009.\n\nThe research described in this publication was carried out at the Jet Propulsion Laboratory, California Institute of\nTechnology, under a contract with the National Aeronautics and Space Administration. Work was performed as part of\nthe ACCESS mission concept study and the Exoplanet Exploration Program at JPL.\n\nPublished - 396491.pdf
", "abstract": "The NASA exoplanet exploration program is dedicated to developing technologies for detecting and characterizing extrasolar planets. In support of that program we have evaluated three different coronagraphic techniques (bandlimited Lyot, optical vortex, and phase-induced pupil apodization) using optical propagation simulations. These utilized a complete hypothetical telescope+coronagraph system with phase and amplitude aberrations. Wavefront control using dual sequential deformable mirrors was performed. We discuss the different computational techniques necessary to accurately simulate each coronagraph.", "date": "2009-08-19", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 744016", "id_number": "CaltechAUTHORS:20150526-154118634", "isbn": "9780819477309", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IV", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-154118634", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.826487", "primary_object": { "basename": "396491.pdf", "url": "https://authors.library.caltech.edu/records/yf511-g1z89/files/396491.pdf" }, "resource_type": "book_section", "pub_year": "2009", "author_list": "Krist, John E.; Moody, Dwight C.; et el." }, { "id": "https://authors.library.caltech.edu/records/4zbzz-djx48", "eprint_id": 57724, "eprint_status": "archive", "datestamp": "2023-08-20 02:36:36", "lastmod": "2024-01-13 16:19:03", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri P." }, "orcid": "0000-0002-8895-4735" }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John T." } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Moody-D-C", "name": { "family": "Moody", "given": "Dwight C." } }, { "id": "Liewer-K-M", "name": { "family": "Liewer", "given": "Kurt M." } }, { "id": "Krist-J-E", "name": { "family": "Krist", "given": "John E." } }, { "id": "Shemo-D-M", "name": { "family": "Shemo", "given": "David M." } }, { "id": "O'Brien-N-A", "name": { "family": "O'Brien", "given": "Nada A." } } ] }, "title": "Vector vortex coronagraph: first results in the visible", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, exoplanets, phase-mask coronagraphy, optical vortex, polarization manipulation,\nwavefront control", "note": "\u00a9 2009 SPIE.\n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA). D. M. is supported by an appointment to the NASA Postdoctoral Program at the Jet Propulsion Laboratory, California Institute of Technology, administered by Oak Ridge Associated Universities through a contract with NASA.\n\nPublished - 396492.pdf
", "abstract": "We report the status of JPL and JDSU ongoing technological developments and contrast results of the vector vortex coronagraph (VVC) made out of liquid crystal polymers (LCP). The first topological charge 4 VVC was tested on the high contrast imaging testbed (HCIT) around 800 nm, under vacuum and with active wavefront control (32x32 Xinetics deformable mirror). We measured the inner working angle or IWA (50% off-axis transmission) at ~ 1.8\u03bb/d. A one-sided dark hole ranging from 3\u03bb/d to 10\u03bb/d was created in polarized light, showing a mean contrast of ~ 2 \u00d7 10^(-7) over a 10% bandwidth. This contrast was maintained very close in (3 \u03bb/d) in a reduced 2% bandwidth. These tests begin to demonstrate the potential of the LCP technology in the most demanding application of a space-based telescope dedicated to extrasolar planet characterization. The main limitations were identified as coming from incoherent sources such as multiple reflections, and residual chromaticity. A second generation of improved masks tackling these issues is being manufactured and will be tested on the HCIT in the coming months.", "date": "2009-08-19", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 74400X", "id_number": "CaltechAUTHORS:20150520-151419415", "isbn": "9780819477309", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IV", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-151419415", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "NASA Postdoctoral Program" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.826569", "primary_object": { "basename": "396492.pdf", "url": "https://authors.library.caltech.edu/records/4zbzz-djx48/files/396492.pdf" }, "resource_type": "book_section", "pub_year": "2009", "author_list": "Mawet, Dimitri P.; Trauger, John T.; et el." }, { "id": "https://authors.library.caltech.edu/records/gnzrx-k3z94", "eprint_id": 57649, "eprint_status": "archive", "datestamp": "2023-08-20 02:30:29", "lastmod": "2024-01-13 16:18:29", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } } ] }, "title": "High\u2010contrast Imaging with a Small, Well\u2010corrected Subaperture and a Phase\u2010mask Coronagraph", "ispublished": "unpub", "full_text_status": "public", "keywords": "High-contrast imaging, adaptive optics, coronagraphy, brown dwarf, debris disk", "note": "\u00a9 2009 American Institute of Physics. Published online 05 August 2009.\n\nThis works was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA). D. M. is supported by an appointment to the NASA Postdoctoral Program at the Jet Propulsion Laboratory, California Institute of Technology, administered by Oak Ridge Associated Universities through a contract with NASA.\n\nPublished - 1.3215878.pdf
", "abstract": "We used the 1.6\u2010meter\u2010diameter off\u2010axis well\u2010corrected subaperture (WCS) on the Palomar Hale telescope with a small inner\u2010working angle (IWA) coronagraph to provide high\u2010contrast images of known brown dwarf companions (HD 130948, HD 49197, and HR 7672) and the first images of the scattered light from HD 32297 debris disk obtained in the Ks band. While providing new constraints for this system, our observations also demonstrate the advantage of this particular instrument configuration.", "date": "2009-08-05", "date_type": "published", "publisher": "American Institute of Physics", "place_of_pub": "Melville, NY", "pagerange": "321-324", "id_number": "CaltechAUTHORS:20150519-100326965", "isbn": "978-0-7354-0695-7", "book_title": "Exoplanets and Disks: Their Formation and Diversity", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150519-100326965", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "NASA Postdoctoral Program" } ] }, "contributors": { "items": [ { "id": "Usuda-Tomonori", "name": { "family": "Usuda", "given": "T." } }, { "id": "Ishii-Mamoru", "name": { "family": "Ishii", "given": "M." } }, { "id": "Tamura-Motohide", "name": { "family": "Tamura", "given": "M." } } ] }, "doi": "10.1063/1.3215878", "primary_object": { "basename": "1.3215878.pdf", "url": "https://authors.library.caltech.edu/records/gnzrx-k3z94/files/1.3215878.pdf" }, "resource_type": "book_section", "pub_year": "2009", "author_list": "Mawet, D. and Serabyn, E." }, { "id": "https://authors.library.caltech.edu/records/nf4dt-mpz02", "eprint_id": 57865, "eprint_status": "archive", "datestamp": "2023-08-20 01:04:22", "lastmod": "2024-01-13 16:20:41", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Danchi-W", "name": { "family": "Danchi", "given": "William" } }, { "id": "Lawson-P", "name": { "family": "Lawson", "given": "Peter" } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Hanot-C", "name": { "family": "Hanot", "given": "Charles" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Infrared Imaging", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2009.\n\nPublished - Infrared_Imaging.pdf
", "abstract": "A mid\u2010infrared mission would enable the detection of biosignatures of Earth\u2010like exoplanets around more than 150 nearby stars. The mid\u2010infrared spectral region is attractive for characterizing exoplanets because contrast with the parent star brightness is more favorable than in the visible (10 million vs. 10 billion), and because mid\u2010infrared light probes deep into a planet's troposphere. Furthermore, the mid\u2010infrared offers access to several strong molecular features that are key signs of life, and also provides a measure of the effective temperature and size of a planet. Taken together, an infrared mission plus a visible one would provide a nearly full picture of a planet, including signs of life; with a measure of mass from an astrometric mission, we would have a virtually complete picture. A small infrared mission would have several telescopes that are rigidly connected, with a science return from the detection and characterization of super\u2010Earth sized to larger planets near the HZ, plus a direct measure of the exozodi brightness in the HZ. In a large infrared mission, with formation\u2010flying telescopes, planets from an Earth\u2010twin and upwards\nin mass could be detected and characterized, as well as the exozodi. If proceeded by an astrometric mission, the detection phase could be skipped and the mission devoted to characterization, as in the visible case; lacking an astrometric mission, an infrared one could proceed alone, as was discussed for a visible coronograph, and with similar caveats. The technology needed for a large formation\u2010flying mission is similar to that for a small connected\u2010element one (e.g., cryogenics and detectors), with the addition of formation-flying technology. The technology is now in hand to implement a probe\u2010scale mission; starlight suppression has even been demonstrated to meet the requirements of a flagship mission. However, additional development of formation\u2010flying technology is needed, particularly in\u2010space testing of sensors and guidance, navigation, and control algorithms.", "date": "2009-03", "date_type": "published", "publisher": "NASA/JPL", "id_number": "CaltechAUTHORS:20150527-133603569", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-133603569", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Lawson-P-R", "name": { "family": "Lawson", "given": "P. R." } }, { "id": "Traub-W-A", "name": { "family": "Traub", "given": "W. A." } }, { "id": "Unwin-S-C", "name": { "family": "Unwin", "given": "S. C." } } ] }, "primary_object": { "basename": "Infrared_Imaging.pdf", "url": "https://authors.library.caltech.edu/records/nf4dt-mpz02/files/Infrared_Imaging.pdf" }, "resource_type": "book_section", "pub_year": "2009", "author_list": "Danchi, William; Lawson, Peter; et el." }, { "id": "https://authors.library.caltech.edu/records/72wgm-nmc98", "eprint_id": 57854, "eprint_status": "archive", "datestamp": "2023-08-20 00:49:29", "lastmod": "2024-01-13 16:20:39", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Levine-Marie", "name": { "family": "Levine", "given": "Marie" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Overview of Technologies for Direct Optical Imaging of Exoplanets", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2009. \n\nThe work described in this report was performed at the Jet Propulsion Laboratory, California Institute of\nTechnology, under a contract with the National Aeronautics and Space Administration.\n\nPublished - Levine_Visible_Planet_Imaging_TEC_EOS.pdf
", "abstract": "The execution of a mission as ambitious and challenging as finding indications of life on planets around other stars requires careful evaluation of potential technological approaches. Following the strong endorsement from the last decadal survey on Astronomy and Astrophysics for the New Millennium (2001), NASA pursued a vigorous TPF program with nearly $150M community investment over the last decade in science, technology and mission studies. After a 3-year head-to-head comparison of exoplanet missions using direct optical imaging and mid-infra red (mid-IR) interferometry, NASA endorsed a visible imaging coronagraphic concept as the first of its exoplanet characterization missions in 2004.", "date": "2009-02", "date_type": "published", "publisher": "NASA", "id_number": "CaltechAUTHORS:20150527-103313767", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-103313767", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "primary_object": { "basename": "Levine_Visible_Planet_Imaging_TEC_EOS.pdf", "url": "https://authors.library.caltech.edu/records/72wgm-nmc98/files/Levine_Visible_Planet_Imaging_TEC_EOS.pdf" }, "resource_type": "book_section", "pub_year": "2009", "author_list": "Levine, Marie and Mawet, Dimitri" }, { "id": "https://authors.library.caltech.edu/records/j9z7d-dra03", "eprint_id": 57867, "eprint_status": "archive", "datestamp": "2023-08-20 00:29:35", "lastmod": "2024-01-13 16:20:42", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Lawson-P-R", "name": { "family": "Lawson", "given": "P. R." } }, { "id": "Akeson-R-L", "name": { "family": "Akeson", "given": "R. L." }, "orcid": "0000-0001-9674-1564" }, { "id": "Beichman-C-A", "name": { "family": "Beichman", "given": "C. A." }, "orcid": "0000-0002-5627-5471" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Technology for a Mid-IR Flagship Mission to Characterize Earth-like Exoplanets", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2009 \n\nThis research was carried out through the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.\n\nPublished - Lawson_NullingFormationFlying_TEC_EOS.pdf
", "abstract": "The exploration of Earth-like exoplanets will be enabled at mid-infrared wavelengths through technology and engineering advances in nulling interferometry and precision formation\nflying. Nulling interferometry provides the dynamic range needed for the detection of biomarkers. Formation flying provides the angular resolution required in the mid-infrared to separately distinguish the spectra of planets in multi-planet systems. The flight performance\nrequirements for nulling have been met and must now be validated in a flight-like environment. Formation-flying algorithms have been demonstrated in the lab and must now be validated in space. Our proposed technology program is described.", "date": "2009", "date_type": "published", "publisher": "NASA", "id_number": "CaltechAUTHORS:20150527-135215843", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-135215843", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" } ] }, "primary_object": { "basename": "Lawson_NullingFormationFlying_TEC_EOS.pdf", "url": "https://authors.library.caltech.edu/records/j9z7d-dra03/files/Lawson_NullingFormationFlying_TEC_EOS.pdf" }, "resource_type": "book_section", "pub_year": "2009", "author_list": "Lawson, P. R.; Akeson, R. L.; et el." }, { "id": "https://authors.library.caltech.edu/records/ze3fr-s2805", "eprint_id": 57729, "eprint_status": "archive", "datestamp": "2023-08-19 23:51:57", "lastmod": "2023-10-23 17:42:27", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "A." }, "orcid": "0000-0001-9353-2724" }, { "id": "Schneider-J", "name": { "family": "Schneider", "given": "J." } }, { "id": "Tinetti-G", "name": { "family": "Tinetti", "given": "G." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "P." } }, { "id": "Galicher-R", "name": { "family": "Galicher", "given": "R." } } ] }, "title": "SEE COAST, a spectro-polarimetric imaging mission to characterize exoplanets", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2008 Soci\u00e9t\u00e9 Francaise d'Astronomie et d'Astrophysique.\n\nPublished - 2008sf2a.conf..0061B.pdf
", "abstract": "SEE COAST is a space mission concept submitted to Cosmic Vision in 2007. It is designed for the characterization of giant gazeous planets and possibly Super Earths both in spectroscopy and polarimetry at visible wavelengths (0.4-1.2\u03bcm). The SEE COAST concept relies on a series of high contrast imaging techniques like coronagraphy, wavefront control and differential imaging. The strategy of the mission is presented and the instrumental concept briefly introduced.", "date": "2008-11", "date_type": "published", "publisher": "Soci\u00e9t\u00e9 Francaise d'Astronomie et d'Astrophysique", "id_number": "CaltechAUTHORS:20150521-075201174", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-075201174", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Charbonnel-C", "name": { "family": "Charbonnel", "given": "C." } }, { "id": "Combes-F", "name": { "family": "Combes", "given": "F." } }, { "id": "Samadi-R", "name": { "family": "Samadi", "given": "R." } } ] }, "primary_object": { "basename": "2008sf2a.conf..0061B.pdf", "url": "https://authors.library.caltech.edu/records/ze3fr-s2805/files/2008sf2a.conf..0061B.pdf" }, "resource_type": "book_section", "pub_year": "2008", "author_list": "Boccaletti, A.; Schneider, J.; et el." }, { "id": "https://authors.library.caltech.edu/records/jjfxm-h1879", "eprint_id": 95553, "eprint_status": "archive", "datestamp": "2023-08-19 23:20:01", "lastmod": "2024-01-14 21:43:39", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Garcia-P-J-V", "name": { "family": "Garcia", "given": "Paulo J. V." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Science case for 1 mas spectro-imagining in the near-infrared", "ispublished": "unpub", "full_text_status": "public", "keywords": "optical interferometry, imaging, spectroscopy, circumstellar disks, debris disks, exoplanets, winds, jets, active galactic nuclei, microlensing", "note": "\u00a9 2008 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nMEF, PJVG and SA were supported in part by the FCT through projects PTDC/CTE-AST/68915/2006 and PTDC/CTE-AST/65971/2006 from POCI, with funds from the European programme FEDER. MEF is supported by the FCT through the research grant SFRH/BPD/36141/2007. BA was partly supported by FWF project P19503. This work was partially supported by the EU FP6 under contract number RII3-Ct-2004-001566 (OPTICON), by an ESO grant and by ISSI and DAAD/EGIDE grants. This manuscript used the SPIE LATEX template developed by Ken Hanson (LANL).\n\nPublished - 70134N.pdf
", "abstract": "We present the work developed within the science team of the Very Large Telescope Interferometer Spectro-Imager (VSI) during the Phase A studies. VSI aims at delivering ~ 1 milliarcsecond resolution data cubes in the near-infrared, with several spectral resolutions up to 12 000, by combining up to 8 VLTI telescopes. In the design of an instrument, the science case plays a central role by supporting the instrument construction decision, defining the top-level requirements and balancing design options. The overall science philosophy of VSI was that of a general user instrument serving a broad community. The science team addressed themes which included several areas of astrophysics and illustrated specific modes of operation of the instrument: a) YSO disks and winds; b) Multiplicity of young stars; c) Exoplanets; d) Debris disks; e) Stellar surface imaging; f) The environments of evolved stars; g) AGN tori; h) AGN's Broad Line Region; i) Supermassive black-holes; and j) Microlensing. The main conclusions can be summarized as follows: a) The accessible targets and related science are extremely sensitive to the instrument limiting magnitude; the instrument should be optimized for sensitivity and have its own fringe tracker. b) Most of the science cases are readily achievable with on-axis fringe tracking, off-axis fringe tracking enabling extra science. c) In most targets (YSOs, evolved stars and AGNs), the interpretation and analysis of circumstellar/nuclear dust morphology requires direct access to the gas via spectral resolved studies of emission lines, requiring at least a spectral resolution of 2 500. d) To routinely deliver images at the required sensitivity, the number of telescopes in determinant, with 6 telescopes being favored. e) The factorial increase in the number of closure phases and visibilities, gained in a single observation, makes massive surveys of parameters and related science for the first time possible. f) High dynamic range imaging and very high dynamic range differential closure phase are possible allowing the study of debris disks and characterization of pegasides. g) Spectro-imaging in the near-infrared is highly complementary to ALMA, adaptive optics and interferometric imaging in the thermal infrared.", "date": "2008-07-28", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 70134N", "id_number": "CaltechAUTHORS:20190517-080545412", "isbn": "9780819472236", "book_title": "Optical and Infrared Interferometry", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190517-080545412", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT)", "grant_number": "PTDC/CTE-AST/68915/2006" }, { "agency": "Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT)", "grant_number": "PTDC/CTE-AST/65971/2006" }, { "agency": "Fondo Europeo de Desarrollo Regional (FEDER)" }, { "agency": "Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT)", "grant_number": "SFRH/BPD/36141/2007" }, { "agency": "FWF Der Wissenschaftsfonds", "grant_number": "P19503" }, { "agency": "European Union", "grant_number": "RII3-Ct-2004-001566" }, { "agency": "European Southern Observatory (ESO)" }, { "agency": "ISSI" }, { "agency": "Deutscher Akademischer Austauschdienst (DAAD)" } ] }, "contributors": { "items": [ { "id": "Sch\u00f6ller-M", "name": { "family": "Sch\u00f6ller", "given": "Markus" } }, { "id": "Danchi-W-C", "name": { "family": "Danchi", "given": "William C." } }, { "id": "Delplancke-F", "name": { "family": "Delplancke", "given": "Fran\u00e7oise" } } ] }, "doi": "10.1117/12.789216", "primary_object": { "basename": "70134N.pdf", "url": "https://authors.library.caltech.edu/records/jjfxm-h1879/files/70134N.pdf" }, "resource_type": "book_section", "pub_year": "2008", "author_list": "Garcia, Paulo J. V. and Mawet, Dimitri" }, { "id": "https://authors.library.caltech.edu/records/1fwep-nd823", "eprint_id": 57845, "eprint_status": "archive", "datestamp": "2023-08-19 23:13:56", "lastmod": "2024-01-13 16:20:33", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John" } }, { "id": "Stapelfeldt-K-R", "name": { "family": "Stapelfeldt", "given": "Karl" }, "orcid": "0000-0002-2805-7338" }, { "id": "Traub-W-A", "name": { "family": "Traub", "given": "Wesley" } }, { "id": "Henry-C", "name": { "family": "Henry", "given": "Curt" } }, { "id": "Krist-J-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Moody-D-C", "name": { "family": "Moody", "given": "Dwight" } }, { "id": "Park-Peggy", "name": { "family": "Park", "given": "Peggy" } }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "title": "ACCESS \u2013 a NASA mission concept study of an Actively-Corrected Coronagraph for Exoplanet System Studies", "ispublished": "unpub", "full_text_status": "public", "keywords": "coronagraphs, exoplanets, space astronomy, active optics", "note": "\u00a9 2008 Society of Photo-Optical Instrumentation Engineers (SPIE). July 14, 2008.\n\nPublished - 396497.pdf
", "abstract": "ACCESS (Actively-Corrected Coronagraph for Exoplanet System Studies) develops the science and engineering case for an investigation of exosolar giant planets, super-earths, exo-earths, and dust/debris fields that would be accessible to a medium-scale NASA mission. The study begins with the observation that coronagraph architectures of all types (other than the external occulter) call for an exceptionally stable telescope and spacecraft, as well as active wavefront correction with one or more deformable mirrors (DMs). During the study, the Lyot, shaped pupil, PIAA, and a number of other coronagraph architectures will all be evaluated on a level playing field that considers science capability (including contrast at the inner working angle (IWA), throughput efficiency, and spectral bandwidth), engineering readiness (including maturity of technology, instrument complexity, and sensitivity to wavefront errors), and mission cost so that a preferred coronagraph architecture can be selected and developed for a medium-class mission.", "date": "2008-07-14", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 701029", "id_number": "CaltechAUTHORS:20150527-084545585", "isbn": "9780819472205", "book_title": "Space Telescopes and Instrumentation 2008: Optical, Infrared, and Millimeter", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-084545585", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Oschmann-J-M-Jr", "name": { "family": "Oschmann", "given": "Jacobus M., Jr." } }, { "id": "de-Graauw-M-W-M", "name": { "family": "de Graauw", "given": "Mattheus W. M." } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } } ] }, "doi": "10.1117/12.789119", "primary_object": { "basename": "396497.pdf", "url": "https://authors.library.caltech.edu/records/1fwep-nd823/files/396497.pdf" }, "resource_type": "book_section", "pub_year": "2008", "author_list": "Trauger, John; Stapelfeldt, Karl; et el." }, { "id": "https://authors.library.caltech.edu/records/h6a4a-w7b08", "eprint_id": 57843, "eprint_status": "archive", "datestamp": "2023-08-19 23:13:51", "lastmod": "2024-01-13 16:20:31", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Garcia-P-J-V", "name": { "family": "Garcia", "given": "Paulo J. V." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Science case for 1 mas spectra-imaging in the near-infrared", "ispublished": "unpub", "full_text_status": "public", "keywords": "optical interferometry, imaging, spectroscopy, circumstellar disks, debris disks, exoplanets, winds, jets, active galactic nuclei, microlensing.", "note": "\u00a9 2008 Society of Photo-Optical Instrumentation Engineers (SPIE). July 14, 2008.\n\nMEF, PJVG and SA were supported in part by the FCT through projects PTDC/CTE-AST/68915/2006 and PTDC/CTE-ST/65971/2006 from POCI, with funds from the European programme FEDER. MEF is supported by the FCT through the research grant SFRH/BPD/36141/2007. BA was partly supported by FWF project P19503. This work was partially supported by the EU FP6 under contract number RII3-Ct-2004-001566 (OPTICON), by an ESQ grant and by ISSI and DAAD/EGIDE grants. This manuscript used the SPIE Tb.TEX template developed by Ken Hanson (LANL).\n\nPublished - 396495.pdf
", "abstract": "We present the work developed within the science team of the Very Large Telescope Interferometer Spectro-Imager (VSI) during the Phase A studies. VSI aims at delivering ~ 1 milliarcsecond resolution data cubes in the near-infrared, with several spectral resolutions up to 12 000, by combining up to 8 VLTI telescopes. In the design of an instrument, the science case plays a central role by supporting the instrument construction decision, defining the top-level requirements and balancing design options. The overall science philosophy of VSI was that of a general user instrument serving a broad community. The science team addressed themes which included several areas of astrophysics and illustrated specific modes of operation of the instrument: a) YSO disks and winds; b) Multiplicity of young stars; c) Exoplanets; d) Debris disks; e) Stellar surface imaging; f) The environments of evolved stars; g) AGN tori; h) AGN's Broad Line Region; i) Supermassive black-holes; and j) Microlensing. The main conclusions can be summarized as follows: a) The accessible targets and related science are extremely sensitive to the instrument limiting magnitude; the instrument should be optimized for sensitivity and have its own fringe tracker. b) Most of the science cases are readily achievable with on-axis fringe tracking, off-axis fringe tracking enabling extra science. c) In most targets (YSOs, evolved stars and AGNs), the interpretation and analysis of circumstellar/nuclear dust morphology requires direct access to the gas via spectral resolved studies of emission lines, requiring at least a spectral resolution of 2 500. d) To routinely deliver images at the required sensitivity, the number of telescopes in determinant, with 6 telescopes being favored. e) The factorial increase in the number of closure phases and visibilities, gained in a single observation, makes massive surveys of parameters and related science for the first time possible. f) High dynamic range imaging and very high dynamic range differential closure phase are possible allowing the study of debris disks and characterization of pegasides. g) Spectro-imaging in the near-infrared is highly complementary to ALMA, adaptive optics and interferometric imaging in the thermal infrared.", "date": "2008-07-14", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 70134N", "id_number": "CaltechAUTHORS:20150527-082739581", "isbn": "9780819472236", "book_title": "Optical and Infrared Interferometry", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-082739581", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT)", "grant_number": "PTDC/CTE-AST/68915/2006" }, { "agency": "Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT)", "grant_number": "PTDC/CTE-ST/65971/2006" }, { "agency": "POCI European programme FEDER. MEF" }, { "agency": "Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT)", "grant_number": "SFRH/BPD/36141/2007" }, { "agency": "Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT)", "grant_number": "P19503" }, { "agency": "EU FP6", "grant_number": "RII3-Ct-2004-001566 (OPTICON)" }, { "agency": "ESQ" }, { "agency": "Deutsche Forschungsgemeinschaft (DFG)" } ] }, "contributors": { "items": [ { "id": "Sch\u00f6ller-M", "name": { "family": "Sch\u00f6ller", "given": "Markus" } }, { "id": "Danchi-W-C", "name": { "family": "Danchi", "given": "William C." } }, { "id": "Delplancke-F", "name": { "family": "Delplancke", "given": "Fran\u00e7\u0327oise" } } ] }, "doi": "10.1117/12.789216", "primary_object": { "basename": "396495.pdf", "url": "https://authors.library.caltech.edu/records/h6a4a-w7b08/files/396495.pdf" }, "resource_type": "book_section", "pub_year": "2008", "author_list": "Garcia, Paulo J. V. and Mawet, Dimitri" }, { "id": "https://authors.library.caltech.edu/records/sky16-49w66", "eprint_id": 57841, "eprint_status": "archive", "datestamp": "2023-08-19 23:13:46", "lastmod": "2024-01-13 16:20:29", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Gabor-Pavel", "name": { "family": "Gabor", "given": "Pavel" } }, { "id": "Schuller-Peter-A", "name": { "family": "Schuller", "given": "Peter A." } }, { "id": "Chazelas-Bruno", "name": { "family": "Chazelas", "given": "Bruno" } }, { "id": "Decaudin-Michel", "name": { "family": "Decaudin", "given": "Michel" } }, { "id": "Lab\u00e8que-Alain", "name": { "family": "Lab\u00e8que", "given": "Alain" } }, { "id": "Duret-Philippe", "name": { "family": "Duret", "given": "Philippe" } }, { "id": "Rabbia-Yves", "name": { "family": "Rabbia", "given": "Yves" } }, { "id": "Launhardt-Ralf", "name": { "family": "Launhardt", "given": "Ralf" } }, { "id": "Gay-Jean", "name": { "family": "Gay", "given": "Jean" } }, { "id": "Sodnik-Zoran", "name": { "family": "Sodnik", "given": "Zoran" } }, { "id": "Barillot-Marc", "name": { "family": "Barillot", "given": "Marc" } }, { "id": "Brachet-Frank", "name": { "family": "Brachet", "given": "Frank" } }, { "id": "Laurent-Thomas", "name": { "family": "Laurent", "given": "Thomas" } }, { "id": "Jacquinod-Sophie", "name": { "family": "Jacquinod", "given": "Sophie" } }, { "id": "Vandormael-Denis", "name": { "family": "Vandormael", "given": "Denis" } }, { "id": "Loicq-J\u00e9r\u00f4me", "name": { "family": "Loicq", "given": "J\u00e9r\u00f4me" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ollivier-Marc", "name": { "family": "Ollivier", "given": "Marc" } }, { "id": "L\u00e9ger-Alain", "name": { "family": "L\u00e9ger", "given": "Alain" } } ] }, "title": "Tests of achromatic phase shifters performed on the SYNAPSE test bench: a progress report", "ispublished": "unpub", "full_text_status": "public", "keywords": "Nulling interferometry, exoplanets, infrared spectroscopy, Darwin/TPF-I, achromatic phase shifters", "note": "\u00a9 2008 Society of Photo-Optical Instrumentation Engineers (SPIE). July 14, 2008.\n\nThis work was supported by Centre National d'Etudes Spatiales (action R&T, n. R-506/SU-002-022) and Agence N ationale de la Recherche (theme blanc, n. 5A 0617).\n\nPublished - 396494.pdf
Submitted - 0812.1901v1.pdf
", "abstract": "The achromatic phase shifter (APS) is a component of the Bracewell nulling interferometer studied in preparation for future space missions (viz. Darwin/TPF-I) focusing on spectroscopic study of Earth-like exo-planets. Several possible designs of such an optical subsystem exist. Four approaches were selected for further study. Thales Alenia Space developed a dielectric prism APS. A focus crossing APS prototype was developed by the OCA, Nice, France. A field reversal APS prototype was prepared by the MPIA in Heidelberg, Germany. Centre Spatial de Liege develops a concept based on Fresnel's rhombs. This paper presents a progress report on the current work aiming at evaluating these prototypes on the Synapse test bench at the Institut d'Astrophysique Spatiale in Orsay, France.", "date": "2008-07-14", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 70134O", "id_number": "CaltechAUTHORS:20150527-071644124", "isbn": "9780819472236", "book_title": "Optical and Infrared Interferometry", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-071644124", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Centre National d'\u00c9tudes Spatiales (CNES)", "grant_number": "R-506/SU-002-022" }, { "agency": "Agence Nationale pour la Recherche (ANR)", "grant_number": "5A 0617" } ] }, "contributors": { "items": [ { "id": "Sch\u00f6ller-Markus", "name": { "family": "Sch\u00f6ller", "given": "Markus" } }, { "id": "Danchi-William-C", "name": { "family": "Danchi", "given": "William C." } }, { "id": "Delplancke-Fran\u00e7oise", "name": { "family": "Delplancke", "given": "Fran\u00e7oise" } } ] }, "doi": "10.1117/12.789269", "primary_object": { "basename": "0812.1901v1.pdf", "url": "https://authors.library.caltech.edu/records/sky16-49w66/files/0812.1901v1.pdf" }, "related_objects": [ { "basename": "396494.pdf", "url": "https://authors.library.caltech.edu/records/sky16-49w66/files/396494.pdf" } ], "resource_type": "book_section", "pub_year": "2008", "author_list": "Gabor, Pavel; Schuller, Peter A.; et el." }, { "id": "https://authors.library.caltech.edu/records/k18x2-ghs35", "eprint_id": 57805, "eprint_status": "archive", "datestamp": "2023-08-19 23:13:40", "lastmod": "2024-01-13 16:20:07", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Martin-S-R", "name": { "family": "Martin", "given": "Stefan" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Liewer-K-M", "name": { "family": "Liewer", "given": "Kurt" } }, { "id": "Loya-F", "name": { "family": "Loya", "given": "Frank" } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Hanot-C", "name": { "family": "Hanot", "given": "Charles" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "The development and applications of a ground-based fiber nulling coronagraph", "ispublished": "unpub", "full_text_status": "public", "keywords": "Nulling interferometry, nulling coronagraphy, exo-planets", "note": "\u00a9 2008 SPIE.\n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the\nNational Aeronautics and Space Administration.\n\nPublished - 396496.pdf
", "abstract": "A rotating nulling coronagraph has been built for use on ground-based telescopes. The system is based on the concept of sub-aperturing the pupil of the telescope with two elliptical apertures and combining the resulting two input beams on a single-mode fiber. By a relative \u03c0 phase shift of the beams, the starlight can be nulled and a relatively faint companion star can be detected. Rotation of the aperture mask on the telescope pupil results in a signal similar to that expected from a space-borne telescope system such as the proposed TPF/Darwin interferometer. The design of the nulling coronagraph and the ancillary systems that are needed, such as the fringe tracker, are described and the potential for observations on telescopes such as the Palomar 200\" is discussed. Results of a nulling experiment using a single mode fiber as a beam combiner for broadband light between 1.50 \u03bcm and 1.80 \u03bcm are shown.", "date": "2008-07-14", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 70131Y", "id_number": "CaltechAUTHORS:20150526-103248763", "isbn": "978-0-8194-7223-6", "book_title": "Optical and Infrared Interferometry", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-103248763", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Sch\u00f6ller-M", "name": { "family": "Sch\u00f6ller", "given": "Markus" } }, { "id": "Danchi-W-C", "name": { "family": "Danchi", "given": "William C." } }, { "id": "Delplancke-F", "name": { "family": "Delplancke", "given": "Fran\u00e7oise" } } ] }, "doi": "10.1117/12.789484", "primary_object": { "basename": "396496.pdf", "url": "https://authors.library.caltech.edu/records/k18x2-ghs35/files/396496.pdf" }, "resource_type": "book_section", "pub_year": "2008", "author_list": "Martin, Stefan; Serabyn, Eugene; et el." }, { "id": "https://authors.library.caltech.edu/records/hkj85-te731", "eprint_id": 57839, "eprint_status": "archive", "datestamp": "2023-08-19 23:07:47", "lastmod": "2024-01-13 16:20:27", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "Anthony" }, "orcid": "0000-0001-9353-2724" }, { "id": "Abe-Lyu", "name": { "family": "Abe", "given": "Lyu" } }, { "id": "Baudrand-J", "name": { "family": "Baudrand", "given": "Jacques" } }, { "id": "Daban-J-B", "name": { "family": "Daban", "given": "Jean-Baptiste" } }, { "id": "Douet-R", "name": { "family": "Douet", "given": "Richard" } }, { "id": "Guerri-G", "name": { "family": "Guerri", "given": "Geraldine" } }, { "id": "Robbe-Dubois-S", "name": { "family": "Robbe-Dubois", "given": "Sylvie" } }, { "id": "Bendjoya-P", "name": { "family": "Bendjoya", "given": "Philippe" } }, { "id": "Dohlen-K", "name": { "family": "Dohlen", "given": "Kjetil" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Prototyping coronagraphs for exoplanet characterization\n with SPHERE", "ispublished": "unpub", "full_text_status": "public", "keywords": "Coronagraphy, High Contrast Imaging, Exoplanets", "note": "\u00a9 2008 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nPublished - 396493.pdf
Submitted - 0807.0694.pdf
", "abstract": "The detection and characterization of extrasolar planets with SPHERE (Spectro Polarimetric High contrast Exoplanet REsearch) is challenging and in particular relies on the ability of a coronagraph to attenuate the diffracted starlight. SPHERE includes 3 instruments, 2 of which can be operated simultaneously in the near IR from 0.95 to 1.8 microns. This requirements is extremely critical for coronagraphy. This paper briefly introduces the concepts of 2 coronagraphs, the Half-Wave Plate Four Quadrant Phase Masks and the Apodized Pupil Lyot Coronagraph, prototyped within the SPHERE consortium by LESIA (Observatory of Paris) and FIZEAU (University of Nice) respectively. Then, we present the measurements of contrast and sensitivity analysis. The comparison with technical specifications allows to validate the technology for manufacturing these coronagraphs.", "date": "2008-07-07", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 70151B", "id_number": "CaltechAUTHORS:20150527-065433063", "isbn": "9780819472250", "book_title": "Adaptive Optics Systems", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-065433063", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Hubin-N", "name": { "family": "Hubin", "given": "Norbert" } }, { "id": "Max-C-E", "name": { "family": "Max", "given": "Claire E." } }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "Peter L." } } ] }, "doi": "10.1117/12.789341", "primary_object": { "basename": "396493.pdf", "url": "https://authors.library.caltech.edu/records/hkj85-te731/files/396493.pdf" }, "related_objects": [ { "basename": "0807.0694.pdf", "url": "https://authors.library.caltech.edu/records/hkj85-te731/files/0807.0694.pdf" } ], "resource_type": "book_section", "pub_year": "2008", "author_list": "Boccaletti, Anthony; Abe, Lyu; et el." }, { "id": "https://authors.library.caltech.edu/records/k6f4z-3vk46", "eprint_id": 57846, "eprint_status": "archive", "datestamp": "2023-08-19 20:58:57", "lastmod": "2024-01-13 16:20:35", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hanot-C", "name": { "family": "Hanot", "given": "C." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Loicq-J", "name": { "family": "Loicq", "given": "J." } }, { "id": "Vandormael-D", "name": { "family": "Vandormael", "given": "D." } }, { "id": "Plesseria-J-Y", "name": { "family": "Plesseria", "given": "J. Y." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } } ] }, "title": "Fresnel Rhombs as Achromatic Phase Shifters for Infrared Nulling Interferometry: First experimental results", "ispublished": "unpub", "full_text_status": "public", "keywords": "Fresnel Rhomb, Achromatic Phase Shifters, nulling interferometry, subwavelength gratings, Zinc\nSelenide, bulk scattering", "note": "\u00a9 2007 Society of Photo-Optical Instrumentation Engineers (SPIE). September 19, 2007.\n\nThe authors acknowledge the financial support of ESA and of the Euro Space Society.\n\nPublished - 396500.pdf
", "abstract": "One of the most critical units of nulling interferometers is the Achromatic Phase Shifter. The concept we propose here is based on optimized Fresnel rhombs, using the total internal reflection phenomenon, modulated or not. The total internal reflection induces a phase shift between the polarization components of the incident light. We present the principles, the current status of the prototype manufacturing and testing operations, as well as preliminary experiments on a ZnSe Fresnel rhomb in the visible that have led to a first error source assessment study. Thanks to these first experimental results using a simple polarimeter arrangement, we have identified the bulk scattering as being the main error source. Fortunately, we have experimentally verified that the scattering can be mitigated using spatial filters and does not decrease the phase shifting capabilities of the ZnSe Fresnel rhomb.", "date": "2007-09-19", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 66931L", "id_number": "CaltechAUTHORS:20150527-090016715", "isbn": "9780819468413", "book_title": "Techniques and Instrumentation for Detection of Exoplanets Ill", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-090016715", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Space Agency (ESA)" }, { "agency": "Euro Space Society" } ] }, "contributors": { "items": [ { "id": "Coulter-D-R", "name": { "family": "Coulter", "given": "Daniel R." } } ] }, "doi": "10.1117/12.758405", "primary_object": { "basename": "396500.pdf", "url": "https://authors.library.caltech.edu/records/k6f4z-3vk46/files/396500.pdf" }, "resource_type": "book_section", "pub_year": "2007", "author_list": "Hanot, C.; Mawet, D.; et el." }, { "id": "https://authors.library.caltech.edu/records/x8stm-75s15", "eprint_id": 57720, "eprint_status": "archive", "datestamp": "2023-08-19 20:58:52", "lastmod": "2024-01-13 16:18:59", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "Pierre" } }, { "id": "Hanot-C", "name": { "family": "Hanot", "given": "Charles" } }, { "id": "Vandormael-D", "name": { "family": "Vandormael", "given": "Denis" } }, { "id": "Loicq-J", "name": { "family": "Loicq", "given": "J\u00e9rome" } }, { "id": "Baudrand-J", "name": { "family": "Baudrand", "given": "Jacques" } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "Serge" } } ] }, "title": "The annular groove phase mask coronagraph: an achromatic optical vortex", "ispublished": "unpub", "full_text_status": "public", "keywords": "coronagraphy, optical vortices, subwavelength optical elements", "note": "\u00a9 2007 SPIE.\n\nThe authors acknowledge the financial support of the Belgian FNRS.\n\nPublished - 396499.pdf
", "abstract": "The Annular Groove Phase Mask coronagraph (AGPM) is an intrinsically achromatic vectorial vortex. It consists of integrated subwavelength optical elements whose space-variant polarization properties can be engineered and optimized to synthesize one of the theoretically most efficient coronagraphs. This paper briefly recalls the principles of the AGPM, presents the benefit of its implementation inside a polarimetric differential imager, realistic numerical simulations assessing its performances, as well as the current status of the near-infrared and visible prototype manufacturing operations.", "date": "2007-09-19", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 66931M", "id_number": "CaltechAUTHORS:20150520-142027045", "isbn": "978-0-8194-6841-3", "book_title": "Techniques and instrumentation for detection of exoplanets III", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-142027045", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fonds de la Recherche Scientifique (FNRS)" } ] }, "contributors": { "items": [ { "id": "Coulter-D-R", "name": { "family": "Coulter", "given": "Daniel R." } } ] }, "doi": "10.1117/12.758406", "primary_object": { "basename": "396499.pdf", "url": "https://authors.library.caltech.edu/records/x8stm-75s15/files/396499.pdf" }, "resource_type": "book_section", "pub_year": "2007", "author_list": "Mawet, Dimitri; Riaud, Pierre; et el." }, { "id": "https://authors.library.caltech.edu/records/k58xs-k6v87", "eprint_id": 95554, "eprint_status": "archive", "datestamp": "2023-08-19 18:43:52", "lastmod": "2024-01-14 21:43:41", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Vandormael-D", "name": { "family": "Vandormael", "given": "D." } }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } }, { "id": "Loicq-J", "name": { "family": "Loicq", "given": "J." } }, { "id": "Lenaerts-C", "name": { "family": "Lenaerts", "given": "C." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Anti-reflective sub-wavelength patterning of IR optics", "ispublished": "unpub", "full_text_status": "public", "keywords": "antireflective, infrared, moth-eye, replication", "note": "\u00a9 2006 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nCSL acknowledges the Walloon region for financial support through the Euclid/Europa program.\n\nPublished - 63950L.pdf
", "abstract": "Thermal infrared (IR) lenses require efficient anti-reflection coating. Moth-eye (or egg-box) 2D subwavelength gratings have demonstrated their ability to reach a very high transmission for a wide wavelength and angular range. The use in thermal IR is simplified by the lower resolution for lithographic technology, compared to visible waveband. However, deeper structures must be engraved and lithography must be adapted to IR materials. In order to be cost-effective, the patterning must be produced by replication techniques, such as embossing. Our laboratory is now experimenting hot embossing of moth-eye patterns in chalcogenide substrates. In this paper, theoretical analysis, micro-lithographic technology and manufacturing processes are detailed.", "date": "2006-10-05", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 63950L", "id_number": "CaltechAUTHORS:20190517-082622240", "isbn": "9780819464934", "book_title": "Electro-Optical and Infrared Systems: Technology and Applications III", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190517-082622240", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Euclid/Europa Program" } ] }, "contributors": { "items": [ { "id": "Driggers-R-G", "name": { "family": "Driggers", "given": "Ronald G." } }, { "id": "Huckridge-D-A", "name": { "family": "Huckridge", "given": "David A." } } ] }, "doi": "10.1117/12.692449", "primary_object": { "basename": "63950L.pdf", "url": "https://authors.library.caltech.edu/records/k58xs-k6v87/files/63950L.pdf" }, "resource_type": "book_section", "pub_year": "2006", "author_list": "Vandormael, D.; Habraken, S.; et el." }, { "id": "https://authors.library.caltech.edu/records/av3t0-v5y24", "eprint_id": 57825, "eprint_status": "archive", "datestamp": "2023-08-19 18:04:19", "lastmod": "2024-01-13 16:20:19", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "The 4m International Liquid Mirror Telescope (ILMT)", "ispublished": "unpub", "full_text_status": "public", "keywords": "liquid mirror telescope, CCD camera, gravitational lensing", "note": "\u00a9 2006 SPIE.\n\nThe ILMT project is supported by contract IUAP P5/36 \"P\u00f4le d'Attraction Interuniversitaire\", by the \"Communaut\u00e9 Fran\u00e7aise\" and the \"R\u00e9gion Wallonne de Belgique\", by the \"Fonds National de la Recherche Scientifique\"\nand the \"Li\u00e8ge University\", Belgium.\n\nPublished - 396504.pdf
", "abstract": "The entire funding has recently been obtained in Belgium for the construction of a 4m Liquid Mirror Telescope. Its prime focus will be equipped with a semi-conventional glass corrector allowing to correct for the TDI effect and a thinned, high quantum efficiency, 4K \u00d7 4K pixel equivalent CCD camera. It will be capable of subarcsecond imaging in the i'(760 nm) and possibly r', g' band(s) over a field of ~ 30' in diameter. This facility will be entirely dedicated to a deep photometric and astrometric variability survey over a period of ~ 5 years. In this paper, the working principle of liquid mirror telescopes is first recalled, along with the advantages and disadvantages of the latter over classical telescopes. Several science cases are described. For a good access to one of the galactic poles, the best image quality sites for the ILMT are located either in Northern Chile (latitude near -29\u00b030') or in North-East India (Nainital Hills, latitude near +29\u00b030'). At those geographic latitudes, a deep (i' = 22.5 mag.) survey will approximately cover 90 square degrees at high galactic latitude, which is very useful for gravitational lensing studies as well as for the identification of various classes of interesting galactic and extragalactic objects (cf. microlensed stars, supernovae, clusters, etc.). A description of the telescope, its instrumentation and the handling of the data is also presented.", "date": "2006-06-27", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 626704", "id_number": "CaltechAUTHORS:20150526-143552401", "isbn": "0-8194-6332-9", "book_title": "Ground-based and Airborne Telescopes", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-143552401", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "P\u00f4le d'Attraction Inter-Universitaire" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" }, { "agency": "R\u00e9gion Wallonne de Belgique" }, { "agency": "Fonds National de la Recherche Scientifique (Belgium)" }, { "agency": "Li\u00e8ge University" } ] }, "contributors": { "items": [ { "id": "Stepp-L-M", "name": { "family": "Stepp", "given": "Larry M." } } ] }, "doi": "10.1117/12.671695", "primary_object": { "basename": "396504.pdf", "url": "https://authors.library.caltech.edu/records/av3t0-v5y24/files/396504.pdf" }, "resource_type": "book_section", "pub_year": "2006", "author_list": "Surdej, J. and Mawet, D." }, { "id": "https://authors.library.caltech.edu/records/swy67-52m61", "eprint_id": 57847, "eprint_status": "archive", "datestamp": "2023-08-19 18:03:25", "lastmod": "2024-01-13 16:20:37", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Lenaerts-C", "name": { "family": "Lenaerts", "given": "C\u00e9dric" } }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "Pierre" } }, { "id": "Vandormael-D", "name": { "family": "Vandormael", "given": "Denis" } }, { "id": "Loicq-J", "name": { "family": "Loicq", "given": "J\u00e9rome" } }, { "id": "Verstraeten-D", "name": { "family": "Verstraeten", "given": "David" } }, { "id": "Fleury-K", "name": { "family": "Fleury", "given": "Karl" } }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "Serge" } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" } ] }, "title": "Infrared Achromatic Phase Shifters using Modulated Total Internal Reflection", "ispublished": "unpub", "full_text_status": "public", "keywords": "Nulling interferometry, Achromatic Phase Shifters, total internal reflection, thin films, subwavelength\ngratings", "note": "\u00a9 2006 Society of Photo-Optical Instrumentation Engineers (SPIE). June 28, 2006.\n\nThe first author acknowledges the financial support of the Belgian \"Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture\". The authors also acknowledge the financial support of ESA.\n\nPublished - 396503.pdf
", "abstract": "We propose a new family of achromatic phase shifters that uses the modulated total internal reflection (TIR) phenomenon. These components can be seen as enhanced Fresnel rhombs for infrared applications like nulling interferometry and polarimetry. The TIR phenomenon comes with a differential phase shift between the polarization components of the incident light. Modulating the index transition at the TIR interface allows compensating for the intrinsic material dispersion in order to make the subsequent phase shift achromatic over broad bands. The modulation can be induced by a thin film of a well-chosen medium or a subwavelength grating whose parameters are specially optimized. We present results from theoretical simulations together with preliminary fabrication outcomes.", "date": "2006-06-22", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 62682J", "id_number": "CaltechAUTHORS:20150527-091322264", "isbn": "9780819463333", "book_title": "Advances in Stellar Interferometry", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-091322264", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fonds pour la Formation \u00e0 la Recherche dans l'\u00edndustrie et dans l'\u00c1griculture (FRIA-Belgium)" }, { "agency": "European Space Agency (ESA)" } ] }, "contributors": { "items": [ { "id": "Monnier-J-D", "name": { "family": "Monnier", "given": "John D." } }, { "id": "Sch\u00f6ller-M", "name": { "family": "Sch\u00f6ller", "given": "Markus" } }, { "id": "Danchi-W-C", "name": { "family": "Danchi", "given": "William C." } } ] }, "doi": "10.1117/12.671572", "primary_object": { "basename": "396503.pdf", "url": "https://authors.library.caltech.edu/records/swy67-52m61/files/396503.pdf" }, "resource_type": "book_section", "pub_year": "2006", "author_list": "Mawet, Dimitri; Lenaerts, C\u00e9dric; et el." }, { "id": "https://authors.library.caltech.edu/records/z6rk6-4b210", "eprint_id": 57728, "eprint_status": "archive", "datestamp": "2023-08-19 17:56:01", "lastmod": "2023-10-23 17:42:24", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Schneider-J", "name": { "family": "Schneider", "given": "J." } }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "P." } }, { "id": "Tinetti-G", "name": { "family": "Tinetti", "given": "G." } }, { "id": "Schmid-H-M", "name": { "family": "Schmid", "given": "H. M." } }, { "id": "Stam-D", "name": { "family": "Stam", "given": "D." } }, { "id": "Udry-S", "name": { "family": "Udry", "given": "S." } }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "P." } }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "A." }, "orcid": "0000-0001-9353-2724" }, { "id": "Grasset-O", "name": { "family": "Grasset", "given": "O." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" } ] }, "title": "SEE-COAST: The Super-Earth Explorer", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2006 Soci\u00e9t\u00e9 Francaise d'Astronomie et d'Astrophysique\n\nPublished - 2006sf2a.conf..0429S.pdf
", "abstract": "The Super-Earth Explorer Coronagraphic Off Axis Space Telescope (SEE-COAST) is a space mission concept to be submitted to ESA call for proposals. It is devoted to the direct imaging, in the visible, of the stellar light reflected by its planetary companion. Here we present the type of planetary characterization we may accomplish with SEE-COAST, and we include a brief description of the spacecraft and mission strategy.", "date": "2006-06", "date_type": "published", "publisher": "Soci\u00e9t\u00e9 Francaise d'Astronomie et d'Astrophysique", "id_number": "CaltechAUTHORS:20150521-072144402", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-072144402", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Barret-D", "name": { "family": "Barret", "given": "D." } }, { "id": "Casoli-F", "name": { "family": "Casoli", "given": "F." } }, { "id": "Contini-T", "name": { "family": "Contini", "given": "T." } }, { "id": "Lagache-G", "name": { "family": "Lagache", "given": "G." } }, { "id": "Lecavelier-A", "name": { "family": "Lecavelier", "given": "A." } }, { "id": "Pagani-L", "name": { "family": "Pagani", "given": "L." } } ] }, "corp_creators": { "items": [ "SEE-COAST Team" ] }, "primary_object": { "basename": "2006sf2a.conf..0429S.pdf", "url": "https://authors.library.caltech.edu/records/z6rk6-4b210/files/2006sf2a.conf..0429S.pdf" }, "resource_type": "book_section", "pub_year": "2006", "author_list": "Schneider, J.; Riaud, P.; et el." }, { "id": "https://authors.library.caltech.edu/records/cc2rk-b6k19", "eprint_id": 57688, "eprint_status": "archive", "datestamp": "2023-08-19 17:49:55", "lastmod": "2024-01-13 16:18:49", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "Pierre" } } ] }, "title": "Subwavelength gratings for phase mask coronagraphy: the 4QZOG and AGPM coronagraphs", "ispublished": "unpub", "full_text_status": "public", "keywords": "High angular resolution, Phase mask coronagraphy, Achromatic phase shifters,\nSubwavelength gratings, Space-variant gratings, Optical vortices", "note": "\u00a9 2006 International Astronomical Union. Cambridge University Press. Provided by the NASA Astrophysics Data System.\n\nD. Mawet and P. Riaud acknowledges the financial support of the Belgian \"Fonds pour la formation a la Recherche dans l'Industrie et dans l' Agriculture\" and the \"Pole d' Attraction Inter-Universitaire\", respectively.\n\nPublished - 2006dies_conf__361M.pdf
", "abstract": "We present two new phase mask coronagraphs implemented with subwavelength diffractive optical elements. The first one is an evolution of the four quadrant phase mask coronagraph (FQPM), which resolves the \u03c0 phase shift chromaticity issue: the four quadrant zeroth order grating (4QZOG). The second one is a totally new design consisting of an optical\nvortex induced by a space-variant grating: the annular groove phase mask (AGPM) coronagraph is fully symmetric and free from any \"shaded zones\". The potential performances of the 4QZOG and AGPM coronagraph are very good, ensuring, for instance, a theoretical contrast of 1.4 x 10^(-7) at 3\u03bb/D over the whole K band. These coronagraphs could be used alone on single-pupil telescopes either in space or on the ground (with an adaptive optics system) to detect exoplanets.", "date": "2006-05-02", "date_type": "published", "publisher": "Cambridge University Press", "place_of_pub": "New York, NY", "pagerange": "361-366", "id_number": "CaltechAUTHORS:20150520-090059986", "isbn": "9780521856072", "book_title": "Direct Imaging of Exoplanets: Science 8 Techniques. Proceedings IA U Colloquium", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-090059986", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fonds pour la formation a la Recherche dans l'Industrie et dans l' Agriculture (Belgian)" }, { "agency": "Pole d' Attraction Inter-Universitaire (Belgian)" } ] }, "contributors": { "items": [ { "id": "Aime-C", "name": { "family": "Aime", "given": "C." } }, { "id": "Vakili-F", "name": { "family": "Vakili", "given": "F." } } ] }, "doi": "10.1017/S1743921306009598", "primary_object": { "basename": "2006dies_conf__361M.pdf", "url": "https://authors.library.caltech.edu/records/cc2rk-b6k19/files/2006dies_conf__361M.pdf" }, "resource_type": "book_section", "pub_year": "2006", "author_list": "Mawet, Dimitri and Riaud, Pierre" }, { "id": "https://authors.library.caltech.edu/records/g3fyt-2hn40", "eprint_id": 57872, "eprint_status": "archive", "datestamp": "2023-08-19 16:29:28", "lastmod": "2024-01-13 16:20:44", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "Pierre" } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Baudrand-J", "name": { "family": "Baudrand", "given": "Jacques" } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" } ] }, "title": "The Four Quadrant-ZOG and Annular Groove Phase Mask Coronagraphs", "ispublished": "unpub", "full_text_status": "public", "keywords": "Phase mask coronagraphy, achromatic phase shifters, subwavelength gratings, space-variant gratings,\noptical vortices", "note": "\u00a9 2005 Society of Photo-Optical Instrumentation Engineers (SPIE). October 05, 2005.\n\nD. Mawet acknowledges the financial support of the Belgian \"Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture\". P. Riaud and J. Surdej acknowledges the financial support of the \"P\u00f4le d'Attraction Inter-Universitaire\".\n\nPublished - 396505.pdf
", "abstract": "Phase mask coronagraphy is a technique aiming at accommodating both high dynamic and high angular resolution imaging of faint sources around bright objects such as exo-planets orbiting their parent stars or host galaxies around Active Galactic Nuclei. We present two new phase mask coronagraphs implemented with subwavelength diffractive optical elements consisting of optimized surface-relief gratings. The first one is an evolution of the Four Quadrant Phase Mask coronagraph, which resolves the \u03c0 phase shift chromaticity problem: the Four Quadrant Zeroth Order Grating (4QZOG). The second one is a totally new design consisting of an optical vortex induced by a space-variant grating: the Annular Groove Phase Mask (AGPM) coronagraph is fully symmetric and free from any \"shaded zones\". Some manufacturing hints are given.", "date": "2005-10-05", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 59051N", "id_number": "CaltechAUTHORS:20150527-145843389", "isbn": "9780819459107", "book_title": "Techniques and Instrumentation for Detection of Exoplanets II", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-145843389", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fonds pour la Formation \u00e0 la Recherche dans l'\u00edndustrie et dans l'\u00c1griculture (FRIA-Belgium)" }, { "agency": "P\u00f4le d'Attraction Inter-Universitaire" } ] }, "contributors": { "items": [ { "id": "Coulter-D-R", "name": { "family": "Coulter", "given": "Daniel R." } } ] }, "doi": "10.1117/12.640363", "primary_object": { "basename": "396505.pdf", "url": "https://authors.library.caltech.edu/records/g3fyt-2hn40/files/396505.pdf" }, "resource_type": "book_section", "pub_year": "2005", "author_list": "Mawet, Dimitri; Riaud, Pierre; et el." }, { "id": "https://authors.library.caltech.edu/records/c0xyt-kac77", "eprint_id": 57874, "eprint_status": "archive", "datestamp": "2023-08-19 14:31:22", "lastmod": "2024-01-13 16:20:46", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Chazelas-Bruno", "name": { "family": "Chazelas", "given": "Bruno" } }, { "id": "Valette-Claude", "name": { "family": "Valette", "given": "Claude" } }, { "id": "L\u00e9pine-Thierry", "name": { "family": "L\u00e9pine", "given": "Thierry" } }, { "id": "Barillot-Marc", "name": { "family": "Barillot", "given": "Marc" } }, { "id": "Brachet-Frank", "name": { "family": "Brachet", "given": "Frank" } }, { "id": "Dervaux-Sebastien", "name": { "family": "Dervaux", "given": "Sebastien" } }, { "id": "Fressin-Fran\u00e7ois", "name": { "family": "Fressin", "given": "Fran\u00e7ois" } }, { "id": "Gay-Jean", "name": { "family": "Gay", "given": "Jean" } }, { "id": "Gadret-Gregory", "name": { "family": "Gadret", "given": "Gregory" } }, { "id": "Lab\u00e8que-Alain", "name": { "family": "Lab\u00e8que", "given": "Alain" } }, { "id": "Launhardt-Ralph", "name": { "family": "Launhardt", "given": "Ralph" } }, { "id": "Mangin-Jacques", "name": { "family": "Mangin", "given": "Jacques" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ollivier-Marc", "name": { "family": "Ollivier", "given": "Marc" } }, { "id": "Rabbia-Elke", "name": { "family": "Rabbia", "given": "Elke" } }, { "id": "Schmidt-Elke", "name": { "family": "Schmidt", "given": "Elke" } } ] }, "title": "Opto-thermo-mechanical numerical simulations of 3 different concepts of infrared achromatic phase shifters", "ispublished": "unpub", "full_text_status": "public", "keywords": "Darwin, numerical simulation, achromatic phase shifter, Nulling, Interferometry", "note": "\u00a9 2004 Society of Photo-Optical Instrumentation Engineers (SPIE). October 20, 2004.\n\nThis work has been done under The ESA contract N\u00b017 005/02/NL/JA. It would not have been possible without the help of the whole NULLTIMATE CONSORTIUM e.g : Alcatel Space, OCA, Kayser Threde .... , the PhD grant of the author (B.C.) is funded by CNRS and ALCATEL SPACE Industries.\n\nPublished - 396506.pdf
", "abstract": "The Darwin/TPF mission aims at detecting directly extra solar planets. It is based on the nulling interferometry, concept proposed by Bracewell in 1978, and developed since 1995 in several European and American laboratories. One of the key optical devices for this technique is the achromatic phase shifter (APS). This optical component is designed to produce a \u03c0 phase shift over the whole Darwin spectral range (i.e. 6-18 \u03bcm), and will be experimentally tested on the NULLTIMATE consortium nulling test bench (Lab\u00e8que et al). Three different concepts of APS are being simulated: dispersive plates focus crossing and field reversal. In this paper, we show how thermal, mechanical and optical models are merged into a single robust model, allowing a global numerical simulation of the optical component performances. We show how these simulations help us to optimizing the design and present results of the numerical model.", "date": "2004-10-20", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "689-697", "id_number": "CaltechAUTHORS:20150527-151159873", "isbn": "9780819454232", "book_title": "New Frontiers in Stellar Interferometry", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-151159873", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Space Agency", "grant_number": "17 005/02/NL/JA" }, { "agency": "Centre National de la Recherche Scientifique (CNRS)" }, { "agency": "ALCATEL SPACE Industries" } ] }, "contributors": { "items": [ { "id": "Traub-W-A", "name": { "family": "Traub", "given": "Wesley A." } } ] }, "doi": "10.1117/12.551587", "primary_object": { "basename": "396506.pdf", "url": "https://authors.library.caltech.edu/records/c0xyt-kac77/files/396506.pdf" }, "resource_type": "book_section", "pub_year": "2004", "author_list": "Chazelas, Bruno; Valette, Claude; et el." }, { "id": "https://authors.library.caltech.edu/records/sjn99-7qz36", "eprint_id": 92316, "eprint_status": "archive", "datestamp": "2023-08-19 13:08:09", "lastmod": "2024-01-14 21:27:08", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Lemarquis-F", "name": { "family": "Lemarquis", "given": "Fr\u00e9d\u00e9ric" } }, { "id": "Lequime-M", "name": { "family": "Lequime", "given": "Michel" } }, { "id": "Albrand-G", "name": { "family": "Albrand", "given": "G\u00e9rard" } }, { "id": "Escoubas-L", "name": { "family": "Escoubas", "given": "Ludovic" } }, { "id": "Simon-J-J", "name": { "family": "Simon", "given": "Jean-Jacques" } }, { "id": "Baudrand-J", "name": { "family": "Baudrand", "given": "Jacques" } }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "Pierre" } }, { "id": "Rouan-D", "name": { "family": "Rouan", "given": "Daniel" } }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "Anthony" }, "orcid": "0000-0001-9353-2724" }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "Pierre" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Manufacturing of four-quadrant phase mask for nulling interferometry in the thermal infrared", "ispublished": "unpub", "full_text_status": "public", "keywords": "Phase mask, exo-planet detection, nulling interferometry, Ion Assisted Deposition, Lift-off", "note": "\u00a9 2004 Society of Photo-optical Instrumentation Engineers (SPIE).\n\nPublished - 435.pdf
", "abstract": "The Four Quadrant Phase Mask is a key component for the design of advanced coronagraphs that may be used to search exo-planets. The validity of this concept has been demonstrated in the visible and need now to be demonstrated in the mid infrared. For this purpose, two components are manufactured for wavelengths 4.75 and 16.25 \u03bcm. This manufacturing requires the deposition of ZnSe layers using Ion Assisted Deposition, followed by a lift off process.", "date": "2004-02-25", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "435-443", "id_number": "CaltechAUTHORS:20190116-104008025", "isbn": "9780819451347", "book_title": "Advances in Optical Thin Films", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190116-104008025", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Amra-C", "name": { "family": "Amra", "given": "Claude" } }, { "id": "Kaiser-N", "name": { "family": "Kaiser", "given": "Norbert" } }, { "id": "Macleod-H-A", "name": { "family": "Macleod", "given": "H. Angus" } } ] }, "doi": "10.1117/12.513386", "primary_object": { "basename": "435.pdf", "url": "https://authors.library.caltech.edu/records/sjn99-7qz36/files/435.pdf" }, "resource_type": "book_section", "pub_year": "2004", "author_list": "Lemarquis, Fr\u00e9d\u00e9ric; Lequime, Michel; et el." }, { "id": "https://authors.library.caltech.edu/records/afafq-53c05", "eprint_id": 57875, "eprint_status": "archive", "datestamp": "2023-08-19 11:04:27", "lastmod": "2024-01-13 16:20:48", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Lenaerts-C", "name": { "family": "Lenaerts", "given": "C." } }, { "id": "Moraeu-V", "name": { "family": "Moreau", "given": "V." } }, { "id": "Renotte-Y", "name": { "family": "Renotte", "given": "Y." } }, { "id": "Rouan-D", "name": { "family": "Rouan", "given": "D." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" } ] }, "title": "Achromatic Four Quadrant Phase Mask using the Dispersion of Form Birefringence", "ispublished": "unpub", "full_text_status": "public", "keywords": "Coronagraphy, 4-quadrant phase mask, achromaticity, subwavelength gratings, ZOGs, form birefringence", "note": "\u00a9 2003 Society of Photo-Optical Instrumentation Engineers (SPIE). February 25, 2003.\n\nPublished - 396507.pdf
", "abstract": "We describe an alternative design for the 4-quadrant phase mask coronagraph described recently by Rouan et al. 2000. Based on the same principle, i.e. producing a very efficient nulling by mutually destructive interferences of the coherent light from the main source, our mask realises the pi phase shift using some properties of ZOGs (Zeroth Order Gratings) and according to an original scheme respecting the 4-quadrant symmetry. When the period of the one-dimension grating structure is smaller than the wavelength of the incident light, the structure becomes birefringent. The effective refractive indices depend on the wavelength. Using this feature, we can design a mask whose nulling e\u00b1ciency is maintained within a wide wavelength range. Numerical simulations were made according to the RCWT (Rigorous Coupled Wave Theory).", "date": "2003-02-25", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "182", "id_number": "CaltechAUTHORS:20150527-152842925", "isbn": "9780819446398", "book_title": "High-Contrast Imaging for Exo-Planet Detection", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-152842925", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Schultz-A-B", "name": { "family": "Schultz", "given": "Alfred B." } }, { "id": "Lyon-R-G", "name": { "family": "Lyon", "given": "Richard G." } } ] }, "doi": "10.1117/12.457918", "primary_object": { "basename": "396507.pdf", "url": "https://authors.library.caltech.edu/records/afafq-53c05/files/396507.pdf" }, "resource_type": "book_section", "pub_year": "2003", "author_list": "Mawet, D.; Lenaerts, C.; et el." }, { "id": "https://authors.library.caltech.edu/records/s28jz-v3a50", "eprint_id": 57878, "eprint_status": "archive", "datestamp": "2023-08-19 10:36:25", "lastmod": "2024-01-13 16:20:50", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Lenaerts-C", "name": { "family": "Lenaerts", "given": "C." } }, { "id": "Moraeu-V", "name": { "family": "Moreau", "given": "V." } }, { "id": "Renotte-Y", "name": { "family": "Renotte", "given": "Y." } }, { "id": "Rouan-D", "name": { "family": "Rouan", "given": "D." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" } ] }, "title": "Achromatic Four Quadrant Phase Mask Coronagraph using the Dispersion of Form Birefringence", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2003 EAS, EDP Sciences 2003. Published online 28 May 2003.\n\nPublished - 397046.pdf
", "abstract": "We describe an alternative design for the 4-quadrant phase mask coronagraph described recently by Rouan et al. 2000. Based on the same principle, i.e. producing a very efficient nulling by mutually destructive interferences of the coherent light from the main source, our mask realises the pi phase shift using some properties of ZOGs (Zeroth Order Gratings) and according to an original scheme respecting the 4-quadrant symmetry. When the period of the one-dimension grating structure is smaller than the wavelength of the incident light, the structure becomes birefringent. The effective refractive indices depend on the wavelength. Using this feature, we can design a mask whose nulling efficiency is maintained within a wide wavelength range. Numerical simulations were made according to the RCWT (Rigorous Coupled Wave Theory).", "date": "2003", "date_type": "published", "publisher": "EDP Sciences", "place_of_pub": "France", "pagerange": "117-128", "id_number": "CaltechAUTHORS:20150528-122813624", "isbn": "2-86883-687-9", "book_title": "Astronomy with High Contrast Imaging", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150528-122813624", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Aime-C", "name": { "family": "Aime", "given": "C." } }, { "id": "Soummer-R", "name": { "family": "Soummer", "given": "R." } } ] }, "doi": "10.1051/eas:2003056", "primary_object": { "basename": "397046.pdf", "url": "https://authors.library.caltech.edu/records/s28jz-v3a50/files/397046.pdf" }, "resource_type": "book_section", "pub_year": "2003", "author_list": "Mawet, D.; Lenaerts, C.; et el." }, { "id": "https://authors.library.caltech.edu/records/vg9st-cjf91", "eprint_id": 57666, "eprint_status": "archive", "datestamp": "2023-08-19 10:36:20", "lastmod": "2024-01-13 16:18:33", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Baudrand-J", "name": { "family": "Baudrand", "given": "J." } }, { "id": "Lenaerts-C", "name": { "family": "Lenaerts", "given": "C." } }, { "id": "Moraeu-V", "name": { "family": "Moreau", "given": "V." } }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "P." } }, { "id": "Rouan-D", "name": { "family": "Rouan", "given": "D." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" } ] }, "title": "Birefringent achromatic phase shifters for nulling interferometry and phase coronagraphy", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2003 ESA Publications.\n\nPublished - 2003ESASP_539__519M.pdf
", "abstract": "Achromatic Phase Shifters are mandatory components in the field of nulling interferometry and phase coronagraphy. Indeed, in order to detect faint objects (e.g. exo-planets) around a central bright star, one must attenuate the latter by all means. To do this, the most efficient way is to \"create\" a destructive interference on the blinding light. This technique is called nulling and is common to the two fields mentioned above; the first with several telescopes, the second with only a single aperture. How does it work? The incoming light from the central object is divided into several beams on which one applies a differential \u03c0 phase shift by means of these so-called phase shifters. Then, when the beams are properly recombined together, they simply subtract from each other. \"Achromatic\" means that we can apply this process over a large spectral bandwidth. This quality will not only be required for the detection and characterization of exo-planets but also for several other astrophysical objects involving huge contrasts like dust shells around young bright stars, AGN,... The proposed birefringent phase shifters and the original implementation schemes we suggest should provide flexible and powerful solutions for these purposes.", "date": "2003", "date_type": "published", "publisher": "ESA Publications", "place_of_pub": "Noordick, Netherlands", "pagerange": "519-524", "id_number": "CaltechAUTHORS:20150519-134722638", "isbn": "92-9092-849-2", "book_title": "Towards Other Earths: DARWIN/TPF and the Search for Extrasolar Terrestrial Planets", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150519-134722638", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Fridlund-M", "name": { "family": "Fridlund", "given": "Malcolm" } }, { "id": "Lacoste-H", "name": { "family": "Lacoste", "given": "H." } } ] }, "primary_object": { "basename": "2003ESASP_539__519M.pdf", "url": "https://authors.library.caltech.edu/records/vg9st-cjf91/files/2003ESASP_539__519M.pdf" }, "resource_type": "book_section", "pub_year": "2003", "author_list": "Mawet, D.; Baudrand, J.; et el." } ]