[ { "id": "https://authors.library.caltech.edu/records/1xdsw-jgs81", "eprint_id": 104964, "eprint_status": "archive", "datestamp": "2023-08-19 22:11:45", "lastmod": "2023-10-20 21:00:21", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Harris-R-J", "name": { "family": "Harris", "given": "Robert J." }, "orcid": "0000-0002-8518-4640" }, { "id": "Cvetojevic-N", "name": { "family": "Cvetojevic", "given": "Nick" }, "orcid": "0000-0002-7465-4176" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" } ] }, "title": "Star crossed? Combining photonics and astronomy", "ispublished": "unpub", "full_text_status": "restricted", "keywords": "astrophotonics, fibers, photonic lantern", "note": "\u00a9 2020 IEEE. \n\nThis work was supported by the European Union's Horizon 2020 research and innovation program under grant agreement No 730890.", "abstract": "Modern astronomical instruments tend to be expensive, massive and built on an ad hoc basis. Devices developed for photonics can replace expensive bulk optics, streamlining instrument development. Here I discuss the challenges and successes in combining photonic technologies and astronomical instrumentation.", "date": "2020-07", "date_type": "published", "publisher": "IEEE", "place_of_pub": "Piscataway, NJ", "pagerange": "1-2", "id_number": "CaltechAUTHORS:20200814-141337979", "isbn": "9781728158877", "book_title": "2020 IEEE Photonics Society Summer Topicals Meeting Series (SUM)", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200814-141337979", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "730890" } ] }, "doi": "10.1109/sum48678.2020.9161062", "resource_type": "book_section", "pub_year": "2020", "author_list": "Harris, Robert J.; Cvetojevic, Nick; 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\n
Published - 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/52fq9-v3512", "eprint_id": 100594, "eprint_status": "archive", "datestamp": "2023-08-19 19:29:04", "lastmod": "2024-01-14 22:05:08", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Norris-B-R-M", "name": { "family": "Norris", "given": "Barnaby R. M." }, "orcid": "0000-0002-8352-7515" }, { "id": "Tuthill-P-G", "name": { "family": "Tuthill", "given": "Peter" } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Lozi-J", "name": { "family": "Lozi", "given": "Julien" }, "orcid": "0000-0002-3047-1845" }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Cvetojevic-N", "name": { "family": "Cvetojevic", "given": "Nick" } }, { "id": "Martinache-F", "name": { "family": "Martinache", "given": "Frantz" }, "orcid": "0000-0003-1180-4138" } ] }, "title": "Diffraction-limited polarimetric imaging of protoplanetary disks and mass-loss shells with VAMPIRES", "ispublished": "unpub", "full_text_status": "public", "keywords": "Interferometry, polarimetry, exoplanets, aperture masking, Subaru telescope, protoplanetary disks", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nPublished - 112030S.pdf
", "abstract": "Both the birth and death of a stellar system are areas of key scientific importance. Whether it's understanding the process of planetary formation in a star's early years, or uncovering the cause of the enormous mass-loss that takes place during a star's dying moments, a key to scientific understanding lies in the inner few AU of the circumstellar environment. Corresponding to scales of 10s of milli-arcseconds, these observations pose a huge technical challenge due to the high angular-resolutions and contrasts required. A major stumbling block is the problem of the Earth's own atmospheric turbulence. The other difficulty is that precise calibration is required to combat the extremely high contrast ratios and high resolutions faced. By taking advantage of the fact that starlight scattered by dust in the circumstellar region is polarized, differential polarimetry can help achieve this calibration. Spectral features can also be utilized.", "date": "2020-01-03", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 112030S", "id_number": "CaltechAUTHORS:20200109-104857484", "isbn": "9781510631465", "book_title": "Advances in Optical Astronomical Instrumentation 2019", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200109-104857484", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Ellis-S-C", "name": { "family": "Ellis", "given": "Simon C." } }, { "id": "d'Orgeville-C", "name": { "family": "d'Orgeville", "given": "C\u00e9line" } } ] }, "doi": "10.1117/12.2539998", "primary_object": { "basename": "112030S.pdf", "url": "https://authors.library.caltech.edu/records/52fq9-v3512/files/112030S.pdf" }, "resource_type": "book_section", "pub_year": "2020", "author_list": "Norris, Barnaby R. M.; Tuthill, Peter; 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/gb46e-q9372", "eprint_id": 98626, "eprint_status": "archive", "datestamp": "2023-08-19 17:47:58", "lastmod": "2024-01-14 21:57:00", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Currie-T", "name": { "family": "Currie", "given": "Thayne" }, "orcid": "0000-0002-7405-3119" }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Lozi-J", "name": { "family": "Lozi", "given": "Julien" }, "orcid": "0000-0002-3047-1845" }, { "id": "Groff-T-D", "name": { "family": "Groff", "given": "Tyler" }, "orcid": "0000-0001-5978-3247" }, { "id": "Kasdin-N-J", "name": { "family": "Kasdin", "given": "N. Jeremy" } }, { "id": "Martinache-F", "name": { "family": "Martinache", "given": "Frantz" }, "orcid": "0000-0003-1180-4138" }, { "id": "Brandt-T-D", "name": { "family": "Brandt", "given": "Timothy D." }, "orcid": "0000-0003-2630-8073" }, { "id": "Chilcote-J-K", "name": { "family": "Chilcote", "given": "Jeffrey" }, "orcid": "0000-0001-6305-7272" }, { "id": "Maroish-C", "name": { "family": "Maroish", "given": "Christian" } }, { "id": "Gerardi-B", "name": { "family": "Gerardi", "given": "Benjamin" } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Vievard-S", "name": { "family": "Vievard", "given": "S\u00e9bastien" } } ] }, "title": "Performance and early science with the Subaru Coronagraphic Extreme Adaptive Optics project", "ispublished": "unpub", "full_text_status": "public", "keywords": "adaptive optics, extrasolar planets, infrared", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nT.C. is supported by a NASA Senior Postdoctoral Fellowship and NASA/Keck grant LK-2663-948181. We emphasize the pivotal cultural role and reverence that the summit of Maunakea has always had within the Hawaiian community. We are most fortunate to conduct scientific observations from this mountain.\n\nPublished - 111170X.pdf
Accepted Version - 1909.10522.pdf
", "abstract": "We describe the current performance of the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument on the Subaru telescope on Maunakea, Hawaii and present early science results for SCExAO coupled with the CHARIS integral field spectrograph. SCExAO now delivers H band Strehl ratios up to ~0.92, extreme AO corrections for optically faint stars, and planet-to-star contrasts rivaling that of GPI and SPHERE. CHARIS yield high signal-to-noise detections and 1.1\u20142.4 micron spectra of benchmark directly-imaged companions like HR 8799 cde and kappa And b that clarify their atmospheric properties. We show how spectra and astrometry for kappa And b lead to a reevaluation of this object's nature. Finally, we briefly describe plans for a SCExAO-focused direct imaging campaign to directly image and characterize young exoplanets, planet-forming disks, and (later) mature planets in reflected light.", "date": "2019-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 111170X", "id_number": "CaltechAUTHORS:20190913-073201467", "isbn": "9781510629271", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190913-073201467", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA Postdoctoral Fellowship" }, { "agency": "NASA", "grant_number": "LK-2663-948181" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.2529689", "primary_object": { "basename": "111170X.pdf", "url": "https://authors.library.caltech.edu/records/gb46e-q9372/files/111170X.pdf" }, "related_objects": [ { "basename": "1909.10522.pdf", "url": "https://authors.library.caltech.edu/records/gb46e-q9372/files/1909.10522.pdf" } ], "resource_type": "book_section", "pub_year": "2019", "author_list": "Currie, Thayne; Guyon, Olivier; 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/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/ntw0z-dq692", "eprint_id": 91414, "eprint_status": "archive", "datestamp": "2023-08-19 11:10:12", "lastmod": "2024-01-14 21:14:34", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "N." } }, { "id": "Ygouf-M", "name": { "family": "Ygouf", "given": "M." }, "orcid": "0000-0001-7591-2731" } ] }, "title": "Review of high-contrast imaging systems for current and future ground- and space-based telescopes I: coronagraph design methods and optical performance metrics", "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\nThe authors would like to acknowledge the Lorentz Center for hosting and to a large extent funding the Optimal Optical Coronagraph workshop held September 25-29, 2017 at the Lorentz Center in Leiden, the Netherlands. Additional funding for the workshop was provided by the European Research Council under ERG Starting Grant agreement 678194 (FALCONER) granted to Frans Snik. This formed the platform where this work was carried out. G. Ruane is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444.\n\nPublished - 106982S.pdf
", "abstract": "The Optimal Optical Coronagraph (OOC) Workshop at the Lorentz Center in September 2017 in Leiden, the Netherlands gathered a diverse group of 25 researchers working on exoplanet instrumentation to stimulate the emergence and sharing of new ideas. In this first installment of a series of three papers summarizing the outcomes of the OOC workshop, we present an overview of design methods and optical performance metrics developed for coronagraph instruments. The design and optimization of coronagraphs for future telescopes has progressed rapidly over the past several years in the context of space mission studies for Exo-C, WFIRST, HabEx, and LUVOIR as well as ground-based telescopes. Design tools have been developed at several institutions to optimize a variety of coronagraph mask types. We aim to give a broad overview of the approaches used, examples of their utility, and provide the optimization tools to the community. Though it is clear that the basic function of coronagraphs is to suppress starlight while maintaining light from off-axis sources, our community lacks a general set of standard performance metrics that apply to both detecting and characterizing exoplanets. The attendees of the OOC workshop agreed that it would benefit our community to clearly define quantities for comparing the performance of coronagraph designs and systems. Therefore, we also present a set of metrics that may be applied to theoretical designs, testbeds, and deployed instruments. We show how these quantities may be used to easily relate the basic properties of the optical instrument to the detection significance of the given point source in the presence of realistic noise.", "date": "2018-08-21", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 106982S", "id_number": "CaltechAUTHORS:20181204-071738445", "isbn": "9781510619494", "book_title": "Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181204-071738445", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "678194" }, { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" } ] }, "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" } ] }, "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": "10.1117/12.2312948", "primary_object": { "basename": "106982S.pdf", "url": "https://authors.library.caltech.edu/records/ntw0z-dq692/files/106982S.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Ruane, G.; Jovanovic, N.; 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/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/2603y-5c338", "eprint_id": 91417, "eprint_status": "archive", "datestamp": "2023-08-19 10:26:01", "lastmod": "2024-01-14 21:14:36", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Lozi-J", "name": { "family": "Lozi", "given": "Julien" }, "orcid": "0000-0002-3047-1845" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } } ] }, "title": "SCExAO, an instrument with a dual purpose: perform cutting-edge science and develop new technologies", "ispublished": "unpub", "full_text_status": "public", "keywords": "Extreme Adaptive Optics, Coronagraphy, High-Contrast Imaging, Pyramid Wavefront Sensor, Polarimetry, MKID, Single-Mode Fiber Injection", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe development of SCExAO was supported by the Japan Society for the Promotion of Science (Grant-in-Aid for Research #23340051, #26220704 & #23103002), the Astrobiology Center of the National Institutes of Natural Sciences, Japan, the Mt Cuba Foundation and the directors contingency fund at Subaru Telescope. F. Martinache's work is supported by the ERC award CoG - 683029. 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 - 1070359.pdf
", "abstract": "The Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument is an extremely modular high- contrast instrument installed on the Subaru telescope in Hawaii. SCExAO has a dual purpose. Its position in the northern hemisphere on a 8-meter telescope makes it a prime instrument for the detection and characterization of exoplanets and stellar environments over a large portion of the sky. In addition, SCExAO's unique design makes it the ideal instrument to test innovative technologies and algorithms quickly in a laboratory setup and subsequently deploy them on-sky. SCExAO benefits from a first stage of wavefront correction with the facility adaptive optics AO188, and splits the 600-2400 nm spectrum towards a variety of modules, in visible and near infrared, optimized for a large range of science cases. The integral field spectrograph CHARIS, with its J, H or K-band high-resolution mode or its broadband low-resolution mode, makes SCExAO a prime instrument for exoplanet detection and characterization. Here we report on the recent developments and scientific results of the SCExAO instrument. Recent upgrades were performed on a number of modules, like the visible polarimetric module VAMPIRES, the high-performance infrared coronagraphs, various wavefront control algorithms, as well as the real-time controller of AO188. The newest addition is the 20k-pixel Microwave Kinetic Inductance Detector (MKIDS) Exoplanet Camera (MEC) that will allow for previously unexplored science and technology developments. MEC, coupled with novel photon-counting speckle control, brings SCExAO closer to the final design of future high-contrast instruments optimized for Giant Segmented Mirror Telescopes (GSMTs).", "date": "2018-07-13", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1070359", "id_number": "CaltechAUTHORS:20181204-074437127", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181204-074437127", "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": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "23103002" }, { "agency": "National Institutes of Natural Sciences of Japan" }, { "agency": "Mt. Cuba Astronomical Foundation" }, { "agency": "Subaru Telescope" }, { "agency": "European Research Council (ERC)", "grant_number": "683029" } ] }, "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": "10.1117/12.2314282", "primary_object": { "basename": "1070359.pdf", "url": "https://authors.library.caltech.edu/records/2603y-5c338/files/1070359.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Lozi, Julien and Jovanovic, Nemanja" }, { "id": "https://authors.library.caltech.edu/records/dke9a-dxz42", "eprint_id": 92170, "eprint_status": "archive", "datestamp": "2023-08-19 10:26:16", "lastmod": "2024-01-14 21:25:22", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Kotani-Takayuki", "name": { "family": "Kotani", "given": "Takayuki" } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } } ] }, "title": "The infrared Doppler (IRD) instrument for the Subaru telescope: instrument description and commissioning results", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2018 Society of Photo-optical Instrumentation Engineers (SPIE).\n\nPublished - 1070211.pdf
", "abstract": "The Infrared Doppler (IRD) instrument is a fiber-fed high-resolution NIR spectrometer for the Subaru telescope covering the Y,J,H-bands simultaneously with a maximum spectral resolution of 70,000. The main purpose of IRD is a search for Earth-mass planets around nearby M-dwarfs by precise radial velocity measurements, as well as a spectroscopic characterization of exoplanet atmospheres. We report the current status of the instrument, which is undergoing commissioning at the Subaru Telescope, and the first light observation successfully done in August 2017. The general description of the instrument will be given including spectrometer optics, fiber injection system, cryogenic system, scrambler, and laser frequency comb. A large strategic survey mainly focused on late-type M-dwarfs is planned to start from 2019.", "date": "2018-07-13", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1070211", "id_number": "CaltechAUTHORS:20190109-111934554", "isbn": "9781510619579", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190109-111934554", "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": "10.1117/12.2311836", "primary_object": { "basename": "1070211.pdf", "url": "https://authors.library.caltech.edu/records/dke9a-dxz42/files/1070211.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Kotani, Takayuki and Jovanovic, Nemanja" }, { "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/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/6gp6n-e1f80", "eprint_id": 92192, "eprint_status": "archive", "datestamp": "2023-08-19 10:25:20", "lastmod": "2024-01-14 21:25:36", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Sahoo-A", "name": { "family": "Sahoo", "given": "Ananya" } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Clergeon-C-S", "name": { "family": "Clergeon", "given": "Christophe S." } }, { "id": "Skaf-N", "name": { "family": "Skaf", "given": "Nour" } }, { "id": "Minowa-Yosuke", "name": { "family": "Minowa", "given": "Yosuke" } }, { "id": "Lozi-J", "name": { "family": "Lozi", "given": "Julien" }, "orcid": "0000-0002-3047-1845" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Martinanche-F", "name": { "family": "Martinanche", "given": "Frantz" } } ] }, "title": "Subaru Coronagraphic Extreme-AO (SCExAO) wavefront control: current status and ongoing developments", "ispublished": "unpub", "full_text_status": "public", "keywords": "adaptive optics, exoplanet, wavefront sensors, astronomical instrumentations, wavefront control", "note": "\u00a9 2018 Society of Photo-optical Instrumentation Engineers (SPIE).\n\nPublished - 1070350.pdf
", "abstract": "Exoplanet imaging requires excellent wavefront correction and calibration. At the Subaru telescope this is achieved us- ing the 188-element facility adaptive optics system(AO188) feeding the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument; a multipurpose instrument built to deliver high contrast images of planets and disks around nearby stars. AO188 offers coarse correction while SCExAO performs fine correction and calibration of 1000 modes. The full system achieves 90%Strehl Ratio in H-band and diffraction limited images. A new Real Time Computer allowing higher performance between SCExAO and AO188 is currently implemented. Future upgrades will include a new Pyramid Wavefront Sensor and (64x64) DM to achieve extreme AO correction inside AO188. We are progressing in the development of predictive control and sensor fusion algorithms across the system to improve performance and calibration. With the new upgrades, SCExAO will be able to image giant planets in reflected light with Subaru and validate technologies necessary to image habitable Earth-like planets with the Thirty Meter Telescope (TMT).", "date": "2018-07-11", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1070350", "id_number": "CaltechAUTHORS:20190110-081725460", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190110-081725460", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Thirty-Meter-Telescope" } ] }, "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": "10.1117/12.2314333", "primary_object": { "basename": "1070350.pdf", "url": "https://authors.library.caltech.edu/records/6gp6n-e1f80/files/1070350.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Sahoo, Ananya; Guyon, Olivier; 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/9yr1y-6vf24", "eprint_id": 98183, "eprint_status": "archive", "datestamp": "2023-08-19 10:23:10", "lastmod": "2024-01-14 21:54:03", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Cvetojevic-N", "name": { "family": "Cvetojevic", "given": "Nick" } }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "Elsa" } }, { "id": "Martin-Guillermo", "name": { "family": "Martin", "given": "Guillermo" } }, { "id": "Lacour-S", "name": { "family": "Lacour", "given": "Sylvestre" }, "orcid": "0000-0002-6948-0263" }, { "id": "Marchis-F", "name": { "family": "Marchis", "given": "Franck" }, "orcid": "0000-0001-7016-7277" }, { "id": "Lozi-J", "name": { "family": "Lozi", "given": "Julien" }, "orcid": "0000-0002-3047-1845" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Vievard-S", "name": { "family": "Vievard", "given": "S\u00e9bastien" } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Gauchet-L", "name": { "family": "Gauchet", "given": "Lucien" } }, { "id": "Perrin-G", "name": { "family": "Perrin", "given": "Guy" } }, { "id": "Duch\u00eane-G", "name": { "family": "Duch\u00eane", "given": "Gaspard" } }, { "id": "Kotani-Takayuki", "name": { "family": "Kotani", "given": "Takayuki" } } ] }, "title": "FIRST, the pupil-remapping fiber interferometer at Subaru telescope: towards photonic beam-combination with phase control and on-sky commissioning results (Conference Presentation)", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE).", "abstract": "FIRST (Fibered Imager foR a Single Telescope) is a post-AO instrument module that enables high-contrast imaging and spectroscopy at sub-diffraction limited spatial scales. FIRST achieves this through a unique combination of sparse aperture masking, spatial filtering, pupil remapping Fizeau interferometry, and cross-dispersion in the visible. The telescope pupil is divided into sub-pupils using a honeycomb array of micro-electro-mechanical mirrors, and the light from each sub-pupil injected into a separate single mode fiber that provides spatial filtering. The fibers, which are pathlength-matched to within a few tens of micrometers, reformat the sub-apertures into a linear non-redundant array allowing for the extraction of fringes from each possible baseline as well as wavelength dispersion to create ~130 spectral channels for every baseline combination over the 600-900nm spectral range. In this presentation, we will first report on the latest on-sky results obtained with FIRST. In its current design, the instrument was successfully integrated on the 3-m telescope at Lick Observatory and is now a module of the SCExAO extreme adaptive optics instrument on the 8-m Subaru Telescope. The latest on-sky results obtained from commissioning data show the detection of the stellar companion of the Alpha Equu binary system at an angular separation of 0.6 \u03bb/D (11mas). Even at such a separation, the FIRST data delivers information on the companion spectrum, providing valuable constraints on the stellar parameters of the system such as the effective temperatures. The second part of this presentation will focus on the ongoing instrument upgrades with the aim of increasing the instrument's stability and sensitivity, thus improving the dynamic range. We initiated a comprehensive upgrade of FIRST's interferometric components to a new series of photonic on-chip beam combiners and automated optoelectronic delay lines for rapid phasing of each sub-pupil. The new photonic beam combining chips split light from each sub-aperture and combines them to provide a simultaneous measurement of the fringes from every baseline. Another function of the new photonic chips is the inclusion of waveguides in crystalline electro-optic material (Lithium niobate) that enable on-chip active phase control of the light at high speeds (up to kHz). This type of photonic architecture has not been implemented previously for astronomical interferometry of this kind and could potentially provide FIRST with key advantages (see Martin et al., these proceedings). While the beam-combiner output no longer requires non-redundancy, the fiber array that feeds the chip input still requires accurate pathlength-matching to achieve high fringe contrasts. The existing fibers were individually manufactured to ensure identical length. However, while this method was successful, it was not very flexible particularly if any photonic components are added that change the overall fiber length. Thus, another key FIRST upgrade is the use of actively controlled fiber delay lines capable of compensating for up to 100 mm of differential pathlength in each fiber, with sub-micron accuracy. This type of active pathlength control allows FIRST to not only correct for unwanted environmental phase delays, but also makes it entirely reconfigurable regardless of the back-end photonics used.", "date": "2018-07-10", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107010A", "id_number": "CaltechAUTHORS:20190823-134013379", "isbn": "9781510619555", "book_title": "Optical and Infrared Interferometry and Imaging VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190823-134013379", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Creech-Eakman-M-J", "name": { "family": "Creech-Eakman", "given": "Michelle J." } }, { "id": "Tuthill-P-G", "name": { "family": "Tuthill", "given": "Peter G." } }, { "id": "M\u00e9rand-A", "name": { "family": "M\u00e9rand", "given": "Antoine" } } ] }, "doi": "10.1117/12.2313262", "resource_type": "book_section", "pub_year": "2018", "author_list": "Cvetojevic, Nick; Huby, Elsa; et el." }, { "id": "https://authors.library.caltech.edu/records/2y118-kbt95", "eprint_id": 91394, "eprint_status": "archive", "datestamp": "2023-08-19 10:22:16", "lastmod": "2024-01-14 21:14:27", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Miller-Kelsey", "name": { "family": "Miller", "given": "Kelsey" } }, { "id": "Males-J-R", "name": { "family": "Males", "given": "Jared R." } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." }, "orcid": "0000-0002-2167-8246" }, { "id": "Doelman-D", "name": { "family": "Doelman", "given": "David" } }, { "id": "Snik-F", "name": { "family": "Snik", "given": "Frans" } }, { "id": "Por-E", "name": { "family": "Por", "given": "Emiel" } }, { "id": "Wilby-M-J", "name": { "family": "Wilby", "given": "Michael J." } }, { "id": "Bohlman-C", "name": { "family": "Bohlman", "given": "Chris" } }, { "id": "Lumbres-J", "name": { "family": "Lumbres", "given": "Jennifer" } }, { "id": "Van-Gorkom-K", "name": { "family": "Van Gorkom", "given": "Kyle" } }, { "id": "Kautz-M", "name": { "family": "Kautz", "given": "Maggie" } }, { "id": "Rodack-A-T", "name": { "family": "Rodack", "given": "Alexander" } }, { "id": "Knight-J-M", "name": { "family": "Knight", "given": "Justin" } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Morzinski-K-M", "name": { "family": "Morzinski", "given": "Katie" } }, { "id": "Schatz-L", "name": { "family": "Schatz", "given": "Lauren" } } ] }, "title": "Focal plane wavefront sensing and control strategies for high-contrast imaging on the MagAO-X instrument", "ispublished": "unpub", "full_text_status": "public", "keywords": "direct exoplanet imaging, high-contrast imaging, modal wavefront sensing (MWFS), wavefront control, low-order wavefront sensing (LOWFS), spatial linear dark field control (LDFC), vector apodizing phase\nplate (vAPP), MagAO-X", "note": "\u00a9 2018 Society of Photo-optical Instrumentation Engineers (SPIE). \n\nThis work was supported [in part] by NSF MRI Award #1625441 (MagAO-X).\n\nPublished - 107031T.pdf
Submitted - 1807.04381.pdf
", "abstract": "The Magellan extreme adaptive optics (MagAO-X) instrument is a new extreme adaptive optics (ExAO) system designed for operation in the visible to near-IR which will deliver high contrast-imaging capabilities. The main AO system will be driven by a pyramid wavefront sensor (PyWFS); however, to mitigate the impact of quasi-static and non-common path (NCP) aberrations, focal plane wavefront sensing (FPWFS) in the form of low-order wavefront sensing (LOWFS) and spatial linear dark field control (LDFC) will be employed behind a vector apodizing phase plate (vAPP) coronagraph using rejected starlight at an intermediate focal plane. These techniques will allow for continuous high-contrast imaging performance at the raw contrast level delivered by the vAPP coronagraph 6 x 10^(-5). We present simulation results for LOWFS and spatial LDFC with a vAPP coronagraph, as well as laboratory results for both algorithms implemented with a vAPP coronagraph at the University of Arizona Extreme Wavefront Control Lab.", "date": "2018-07-10", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107031T", "id_number": "CaltechAUTHORS:20181203-100625314", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181203-100625314", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1625441" } ] }, "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": "10.1117/12.2312809", "primary_object": { "basename": "107031T.pdf", "url": "https://authors.library.caltech.edu/records/2y118-kbt95/files/107031T.pdf" }, "related_objects": [ { "basename": "1807.04381.pdf", "url": "https://authors.library.caltech.edu/records/2y118-kbt95/files/1807.04381.pdf" } ], "resource_type": "book_section", "pub_year": "2018", "author_list": "Miller, Kelsey; Males, Jared R.; 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/mdex7-c9e53", "eprint_id": 91393, "eprint_status": "archive", "datestamp": "2023-08-19 10:22:09", "lastmod": "2024-01-14 21:14:24", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Males-J-R", "name": { "family": "Males", "given": "Jared R." } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } } ] }, "title": "MagAO-X: project status and first laboratory results", "ispublished": "unpub", "full_text_status": "public", "keywords": "adaptive optics, wavefront sensing, wavefront control, coronagraphs, high contrast imaging, exoplanets", "note": "\u00a9 2018 Society of Photo-optical Instrumentation Engineers (SPIE). \n\nWe are very grateful for support from the NSF MRI Award #1625441 (MagAO-X).\n\nPublished - 1070309.pdf
Submitted - 1807.04315.pdf
", "abstract": "MagAO-X is an entirely new extreme adaptive optics system for the Magellan Clay 6.5 m telescope, funded by the NSF MRI program starting in Sep 2016. The key science goal of MagAO-X is high-contrast imaging of accreting protoplanets at H\u03b1. With 2040 actuators operating at up to 3630 Hz, MagAO-X will deliver high Strehls (> 70%), high resolution (19 mas), and high contrast (< 1 \u00d7 10^(-4)) at H\u03b1 (656 nm). We present an overview of the MagAO-X system, review the system design, and discuss the current project status.", "date": "2018-07-10", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1070309", "id_number": "CaltechAUTHORS:20181203-100208750", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181203-100208750", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1625441" } ] }, "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": "10.1117/12.2312992", "primary_object": { "basename": "1070309.pdf", "url": "https://authors.library.caltech.edu/records/mdex7-c9e53/files/1070309.pdf" }, "related_objects": [ { "basename": "1807.04315.pdf", "url": "https://authors.library.caltech.edu/records/mdex7-c9e53/files/1807.04315.pdf" } ], "resource_type": "book_section", "pub_year": "2018", "author_list": "Males, Jared R. and Jovanovic, Nemanja" }, { "id": "https://authors.library.caltech.edu/records/kr0f1-x4617", "eprint_id": 91315, "eprint_status": "archive", "datestamp": "2023-08-19 10:21:54", "lastmod": "2024-01-14 21:13:50", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Knight-J-M", "name": { "family": "Knight", "given": "Justin M." } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Lozi-J", "name": { "family": "Lozi", "given": "Julien" }, "orcid": "0000-0002-3047-1845" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Males-J-R", "name": { "family": "Males", "given": "Jared R." } } ] }, "title": "Phase-induced amplitude apodization complex-mask coronagraph tolerancing and analysis", "ispublished": "unpub", "full_text_status": "public", "keywords": "stellar coronagraph, PIAACMC, focal plane mask, tolerancing, Monte Carlo", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis research is supported in part by a NASA TDEM grant and NSF MRI Award #1625441 (MagAO-X). A portion of the fabrication work was done in the ASU Nanfab Facility. A portion of the fabrication work was done in the Cornell NanoScale Science and Technology Facility.\n\nPublished - 107065O.pdf
Submitted - 1807.04379.pdf
", "abstract": "Phase-Induced Amplitude Apodization Complex Mask Coronagraphs (PIAACMC) offer high-contrast performance at a small inner-working angle (< 1 \u03bb/D) with high planet throughput (> 70%). The complex mask is a multi-zone, phase-shifting mask comprised of tiled hexagons which vary in depth. Complex masks can be difficult to fabricate as there are many micron-scale hexagonal zones (> 500 on average) with continuous depths ranging over a few microns. Ensuring the broadband PIAACMC design performance carries through to fabricated devices requires that these complex masks are manufactured to within well-defined tolerances. We report on a simulated tolerance analysis of a \"toy\" PIAACMC design which characterizes the effect of common microfabrication errors on on-axis contrast performance using a simple Monte Carlo method. Moreover, the tolerance analysis provides crucial information for choosing a fabrication process which yields working devices while potentially reducing process complexity. The common fabrication errors investigated are zone depth discretization, zone depth errors, and edge artifacts between zones.", "date": "2018-07-10", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107065O", "id_number": "CaltechAUTHORS:20181128-143703546", "isbn": "9781510619654", "book_title": "Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181128-143703546", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA" }, { "agency": "NSF", "grant_number": "AST-1625441" } ] }, "contributors": { "items": [ { "id": "Navarro-R", "name": { "family": "Navarro", "given": "Ram\u00f3n" } }, { "id": "Geyl-R", "name": { "family": "Geyl", "given": "Roland" } } ] }, "doi": "10.1117/12.2314139", "primary_object": { "basename": "107065O.pdf", "url": "https://authors.library.caltech.edu/records/kr0f1-x4617/files/107065O.pdf" }, "related_objects": [ { "basename": "1807.04379.pdf", "url": "https://authors.library.caltech.edu/records/kr0f1-x4617/files/1807.04379.pdf" } ], "resource_type": "book_section", "pub_year": "2018", "author_list": "Knight, Justin M.; Guyon, Olivier; et el." }, { "id": "https://authors.library.caltech.edu/records/ee8v2-k3z41", "eprint_id": 91338, "eprint_status": "archive", "datestamp": "2023-08-19 10:22:02", "lastmod": "2024-01-14 21:13:53", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Snik-F", "name": { "family": "Snik", "given": "Frans" } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Ygouf-M", "name": { "family": "Ygouf", "given": "Marie" }, "orcid": "0000-0001-7591-2731" } ] }, "title": "Review of high-contrast imaging systems for current and future ground-based and space-based telescopes III: technology opportunities and pathways", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, Exoplanets, Technology", "note": "\u00a9 2018 Society of Photo-optical Instrumentation Engineers (SPIE). \n\nThe authors would like to acknowledge the Lorentz Center for hosting and to a large extend funding the Optimal Optical Coronagraph workshop in Leiden 2017. Additional funding for the workshop was provided by the European Research Council under ERC Starting Grant agreement 678194 (FALCONER) granted to Frans Snik. This formed the platform where this work was carried out.\n\nPublished - 107062L.pdf
Submitted - 1807.07100.pdf
", "abstract": "The Optimal Optical CoronagraphWorkshop at the Lorentz Center in September 2017 in Leiden, the Netherlands gathered a diverse group of 30 researchers working on exoplanet instrumentation to stimulate the emergence and sharing of new ideas. This contribution is the final part of a series of three papers summarizing the outcomes of the workshop, and presents an overview of novel optical technologies and systems that are implemented or considered for high-contrast imaging instruments on both ground-based and space telescopes. The overall objective of high contrast instruments is to provide direct observations and characterizations of exoplanets at contrast levels as extreme as 10^(-10). We list shortcomings of current technologies, and identify opportunities and development paths for new technologies that enable quantum leaps in performance. Specifically, we discuss the design and manufacturing of key components like advanced deformable mirrors and coronagraphic optics, and their amalgamation in \"adaptive coronagraph\" systems. Moreover, we discuss highly integrated system designs that combine contrast-enhancing techniques and characterization techniques (like high-resolution spectroscopy) while minimizing the overall complexity. Finally, we explore extreme implementations using all-photonics solutions for ground-based telescopes and dedicated huge apertures for space telescopes.", "date": "2018-07-10", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107062L", "id_number": "CaltechAUTHORS:20181129-144758627", "isbn": "9781510619654", "book_title": "Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181129-144758627", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "678194" } ] }, "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" } ] }, "contributors": { "items": [ { "id": "Navarro-R", "name": { "family": "Navarro", "given": "Ram\u00f3n" } }, { "id": "Geyl-R", "name": { "family": "Geyl", "given": "Roland" } } ] }, "doi": "10.1117/12.2313957", "primary_object": { "basename": "107062L.pdf", "url": "https://authors.library.caltech.edu/records/ee8v2-k3z41/files/107062L.pdf" }, "related_objects": [ { "basename": "1807.07100.pdf", "url": "https://authors.library.caltech.edu/records/ee8v2-k3z41/files/1807.07100.pdf" } ], "resource_type": "book_section", "pub_year": "2018", "author_list": "Snik, Frans; Jovanovic, Nemanja; et el." }, { "id": "https://authors.library.caltech.edu/records/ycftf-hfn52", "eprint_id": 91398, "eprint_status": "archive", "datestamp": "2023-08-19 10:22:22", "lastmod": "2024-01-14 21:14:31", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Ygouf-M", "name": { "family": "Ygouf", "given": "Marie" }, "orcid": "0000-0001-7591-2731" } ] }, "title": "Review of high-contrast imaging systems for current and future ground-based and space-based telescopes: Part II. Common path wavefront sensing/control and coherent differential imaging", "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. \n\nThe authors would like to acknowledge the Lorentz Center for hosting and to a large extend funding the Optimal Optical Coronagraph workshop in Leiden 2017. Additional funding for the workshop was provided by the European Research Council under ERC Starting Grant agreement 678194 (FALCONER) granted to Frans Snik. This formed the platform where this work was carried out.\n\nPublished - 107031U.pdf
Submitted - 1807.07043.pdf
", "abstract": "The Optimal Optical Coronagraph (OOC) Workshop held at the Lorentz Center in September 2017 in Leiden, the Netherlands, gathered a diverse group of 25 researchers working on exoplanet instrumentation to stimulate the emergence and sharing of new ideas. In this second installment of a series of three papers summarizing the outcomes of the OOC workshop, we present an overview of common path wavefront sensing/control and Coherent Differential Imaging techniques, highlight the latest results, and expose their relative strengths and weaknesses. We layout critical milestones for the field with the aim of enhancing future ground/space based high contrast imaging platforms. Techniques like these will help to bridge the daunting contrast gap required to image a terrestrial planet in the zone where it can retain liquid water, in reflected light around a G type star from space.", "date": "2018-07-10", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107031U", "id_number": "CaltechAUTHORS:20181203-104212029", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181203-104212029", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "678194" } ] }, "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" } ] }, "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": "10.1117/12.2314260", "primary_object": { "basename": "107031U.pdf", "url": "https://authors.library.caltech.edu/records/ycftf-hfn52/files/107031U.pdf" }, "related_objects": [ { "basename": "1807.07043.pdf", "url": "https://authors.library.caltech.edu/records/ycftf-hfn52/files/1807.07043.pdf" } ], "resource_type": "book_section", "pub_year": "2018", "author_list": "Jovanovic, Nemanja; Ruane, Garreth; 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/vxmjf-t9z54", "eprint_id": 98182, "eprint_status": "archive", "datestamp": "2023-08-19 10:19:51", "lastmod": "2024-01-14 21:54:01", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Walter-A-B", "name": { "family": "Walter", "given": "Alex" } }, { "id": "Mazin-B-A", "name": { "family": "Mazin", "given": "Benjamin A." } }, { "id": "Bockstiegel-C", "name": { "family": "Bockstiegel", "given": "Clint" } }, { "id": "Fruitwala-N", "name": { "family": "Fruitwala", "given": "Neelay" } }, { "id": "Szypryt-P", "name": { "family": "Szypryt", "given": "Paul" } }, { "id": "Lipartito-I", "name": { "family": "Lipartito", "given": "Isabel" } }, { "id": "Meeker-S-R", "name": { "family": "Meeker", "given": "Seth" } }, { "id": "Zobrist-N", "name": { "family": "Zobrist", "given": "Nicholas" } }, { "id": "Collura-G", "name": { "family": "Collura", "given": "Giulia" } }, { "id": "Coiffard-G", "name": { "family": "Coiffard", "given": "Gr\u00e9goire" } }, { "id": "Strader-P", "name": { "family": "Strader", "given": "Paschal" } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Lozi-J", "name": { "family": "Lozi", "given": "Julien" }, "orcid": "0000-0002-3047-1845" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } } ] }, "title": "MEC: the MKID exoplanet camera for high contrast astronomy at Subaru (Conference Presentation)", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE).", "abstract": "Direct Imaging of exoplanets is one of the most technically difficult techniques used to study exoplanets, but holds immense promise for not just detecting but characterizing planets around the nearest stars. Ambitious instruments at the world's largest telescopes have been built to carry out this science: the Gemini Planet Imager (GPI), SPHERE at VLT, SCExAO at Subaru, and the P1640 and Stellar Double Coronagraph (SDC) at Palomar. These instruments share a common archetype consisting of an extreme AO system feeding a coronagraph for on-axis stellar light rejection followed by a focal plane Integral Field Spectrograph (IFS). They are currently limited by uncontrolled scattered and diffracted light which produces a coherent speckle halo in the image plane. A number of differential imaging schemes exist to mitigate these issues resulting in star-planet contrast ratios as deep as ~10^-6 at low angular separations. Surpassing this contrast limit requires high speed active speckle nullification from a focal plane wavefront sensor (FPWS) and new processing techniques. MEC, the Microwave Kinetic Inductance Detector (MKID) Exoplanet Camera, is a J-band IFS module behind Subaru Telescope's SCExAO system. MEC is capable of producing an image cube several thousand times a second without the read noise that dominates conventional high speed IFUs. This enables it to integrate with SCExAO as an extremely fast FPWS while eliminating non-common path aberrations by doubling as a science camera. Key science objectives can be further explored if longer wavelengths (H and K band) are simultaneously sent to CHARIS for high resolution spectroscopy. MEC, to be commissioned at Subaru in early 2018, is the second MKID IFS for high contrast imaging following DARKNESS' debut at Palomar in July 2016. MEC will follow up on young planets and debris disks discovered in the SEEDS survey or by Project 1640 as well as discover self-luminous massive planets. The increased sensitivity, combined with the advanced coronagraphs in SCExAO which have inner working angles (IWAs) as small as 0.03\" at 1.2 \u03bcm, allows young Jupiter-sized objects to be imaged as close as 4 AU from their host star. If the wavefront control enabled by MEC is fully realized, it may begin to probe the reflected light of giant planets around some nearby stars, opening a new parameter space for direct imaging targeting older stars. While direct imaging of reflected light exoplanets is the most challenging of the scientific goals, it is a promising long-term path towards characterization of habitable planets around nearby stars using Extremely Large Telescopes (ELTs). With diameters of about 30-m, an ELT can resolve the habitable zones of nearby M-type stars, for which an Earth-sized planet would be at ~10^(-7) contrast at 1 \u03bcm. This will complement future space-based high contrast optical imaging targeting the wider habitable zones of sun-like stars for ~10^(-10) contrast earth analogs. We will present lessons learned from the first few months of MEC's operation including initial lab and on-sky (weather permitting) results. We already have preliminary data from Palomar testing a new statistical speckle discrimination post-processing technique using the photon arrival time measured with MKIDs. Residual stellar light in the form of a speckle masquerading as a planetary companion is pulled from a modified Rician distribution and can be statistically discerned from a true off-axis Poisson point source. Additionally, the progress of active focal plane wavefront control will be briefly discussed.", "date": "2018-07-09", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107020V", "id_number": "CaltechAUTHORS:20190823-134013267", "isbn": "9781510619579", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190823-134013267", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Christipher J." } }, { "id": "Simard-L", "name": { "family": "Simard", "given": "Luc" } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2311586", "resource_type": "book_section", "pub_year": "2018", "author_list": "Walter, Alex; Mazin, Benjamin A.; et el." }, { "id": "https://authors.library.caltech.edu/records/m98k0-xbe82", "eprint_id": 92050, "eprint_status": "archive", "datestamp": "2023-08-19 10:18:25", "lastmod": "2024-01-14 21:24:11", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Tuthill-P-G", "name": { "family": "Tuthill", "given": "Peter" } }, { "id": "Bendek-E-A", "name": { "family": "Bendek", "given": "Eduardo" } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Horton-A", "name": { "family": "Horton", "given": "Anthony" } }, { "id": "Jeffries-B", "name": { "family": "Jeffries", "given": "Bryn" } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Klupar-P", "name": { "family": "Klupar", "given": "Pete" } }, { "id": "Larkin-K", "name": { "family": "Larkin", "given": "Kieran" } }, { "id": "Norris-B", "name": { "family": "Norris", "given": "Barnaby" } }, { "id": "Pope-B-J-S", "name": { "family": "Pope", "given": "Benjamin" } }, { "id": "Shao-Michael", "name": { "family": "Shao", "given": "Mike" } } ] }, "title": "The TOLIMAN space telescope", "ispublished": "unpub", "full_text_status": "public", "keywords": "Astrometry, Exoplanet detection, high precision astronomical measurement", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe original scientific impetus as well as critical financial and logistical support for this research program were provided by the Breakthrough Prize Foundation. The authors also acknowledge the University of Sydney who are joint partners in the study which produced the results presented.\n\nPublished - 107011J.pdf
", "abstract": "The TOLIMAN space telescope is a low-cost, agile mission concept dedicated to astrometric detection of exoplanets in the near-solar environment, and particularly targeting the Alpha Cen system. Although successful discovery technologies are now populating exoplanetary catalogs into the thousands, contemporary astronomy is still poorly equipped to answer the basic question of whether there are any rocky planets orbiting any particular star system. Toliman will make a first study of stars within 10 PC of the sun by deploying an innovative optical and signal encoding architecture that leverages the most promising technology to deliver data on this critical stellar sample: high precision astrometric monitoring. Here we present results from the Foundational Mission Study, jointly funded by the Breakthrough Prize Foundation and the University of Sydney which has translated innovative underlying design principles into error budgets and potential spacecraft systems designs.", "date": "2018-07-09", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107011J", "id_number": "CaltechAUTHORS:20190103-153503732", "isbn": "9781510619555", "book_title": "Optical and Infrared Interferometry and Imaging VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190103-153503732", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Breakthrough Prize Foundation" } ] }, "contributors": { "items": [ { "id": "Creech-Eakman-M-J", "name": { "family": "Creech-Eakman", "given": "Michelle J." } }, { "id": "Tuthill-P-G", "name": { "family": "Tuthill", "given": "Peter G." } }, { "id": "M\u00e9rand-A", "name": { "family": "M\u00e9rand", "given": "Antoine" } } ] }, "doi": "10.1117/12.2313269", "primary_object": { "basename": "107011J.pdf", "url": "https://authors.library.caltech.edu/records/m98k0-xbe82/files/107011J.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Tuthill, Peter; Bendek, Eduardo; et el." }, { "id": "https://authors.library.caltech.edu/records/9bp15-vq674", "eprint_id": 92131, "eprint_status": "archive", "datestamp": "2023-08-19 10:16:14", "lastmod": "2024-01-14 21:24:43", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Rains-A-D", "name": { "family": "Rains", "given": "Adam D." } }, { "id": "Ireland-M-J", "name": { "family": "Ireland", "given": "Michael J." }, "orcid": "0000-0002-6194-043X" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Bento-J", "name": { "family": "Bento", "given": "Joao" } }, { "id": "Feger-T", "name": { "family": "Feger", "given": "Tobias" } }, { "id": "Lozi-J", "name": { "family": "Lozi", "given": "Julien" }, "orcid": "0000-0002-3047-1845" }, { "id": "Schwab-C", "name": { "family": "Schwab", "given": "Christian" }, "orcid": "0000-0002-4046-987X" }, { "id": "Coutts-D-W", "name": { "family": "Coutts", "given": "David W." } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Arriola-A", "name": { "family": "Arriola", "given": "Alexander" } }, { "id": "Gross-S", "name": { "family": "Gross", "given": "Simon" }, "orcid": "0000-0001-5130-183X" }, { "id": "Harris-J-E", "name": { "family": "Harris", "given": "Jonathan E." } } ] }, "title": "Development of the single-mode fiber integral field unit for the RHEA Spectrograph", "ispublished": "unpub", "full_text_status": "public", "keywords": "spectrograph, radial velocity, optical fibers, fiber injection, diffraction-limited spectrograph, high\nresolution, integral field unit", "note": "\u00a9 2018 Society of Photo-optical Instrumentation Engineers (SPIE). \n\nThis work was partially funded by the Australian Research Council Discovery Project DP120103751. We would like to thank Macquarie Engineering and Technical Services (METS) and the RSAA Manufacturing Workshop for their work in machining parts to complete the spectrograph assembly. Furthermore we thank Dr Benjamin Johnston, Dr Martin Ams and Alex Stokes from OptoFab for their assistance in constructing the fiber cable used for RHEA@Subaru, as well as OptoFab for use of the Nanosecond Laser Micro-Fabrication Facility, and Optical Device Characterisation Suite. ADR acknowledges support from the Australian Government Research Training Program, and the RSAA top up scholarship. We would like to thank the Subaru Telescope and the National Astronomical Observatory of Japan for granting us the opportunity to undertake this project and for their continued assistance throughout. 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 - 107025J.pdf
", "abstract": "RHEA is a single-mode \u00e9chelle spectrograph designed to be a replicable and cost effective method of undertaking precision radial velocity measurements. The instrument has a novel fiber feed with an integral field unit injecting into a grid of single-mode fibers reformatted to form a pseudo-slit, increasing throughput and enabling highspatial resolution observations when operating behind Subaru and the SCExAO adaptive optics system. The past 18 months have seen a replacement cable constructed for the instrument to address modal noise caused by closely packed fibers with similar path lengths. Here we detail the cable fabrication procedure, design improvements, increased precision in meeting the required sub-micron optical tolerances, throughput gains, and known remaining issues.", "date": "2018-07-06", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107025J", "id_number": "CaltechAUTHORS:20190108-094225132", "isbn": "9781510619579", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190108-094225132", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Australian Research Council", "grant_number": "DP120103751" }, { "agency": "Australian Government Research Training Program" } ] }, "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": "10.1117/12.2314336", "primary_object": { "basename": "107025J.pdf", "url": "https://authors.library.caltech.edu/records/9bp15-vq674/files/107025J.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Rains, Adam D.; Ireland, Michael J.; 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/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/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/8fjrd-1yn30", "eprint_id": 84864, "eprint_status": "archive", "datestamp": "2023-08-19 05:01:47", "lastmod": "2024-01-14 19:31:09", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Groff-T-D", "name": { "family": "Groff", "given": "Tyler" }, "orcid": "0000-0001-5978-3247" }, { "id": "Chilcote-J-K", "name": { "family": "Chilcote", "given": "Jeffrey" }, "orcid": "0000-0001-6305-7272" }, { "id": "Brandt-T-D", "name": { "family": "Brandt", "given": "Timothy" }, "orcid": "0000-0003-2630-8073" }, { "id": "Kasdin-N-J", "name": { "family": "Kasdin", "given": "N. Jeremy" } }, { "id": "Galvin-M", "name": { "family": "Galvin", "given": "Michael" } }, { "id": "Loomis-C-P", "name": { "family": "Loomis", "given": "Craig" } }, { "id": "Rizzo-M-J", "name": { "family": "Rizzo", "given": "Maxime" } }, { "id": "Knapp-G-R", "name": { "family": "Knapp", "given": "Gillian" }, "orcid": "0000-0002-9259-1164" }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Lozi-J", "name": { "family": "Lozi", "given": "Julien" }, "orcid": "0000-0002-3047-1845" }, { "id": "Currie-T", "name": { "family": "Currie", "given": "Thayne" }, "orcid": "0000-0002-7405-3119" }, { "id": "Takato-Naruhisa", "name": { "family": "Takato", "given": "Naruhisa" } }, { "id": "Hayashi-Masahiko", "name": { "family": "Hayashi", "given": "Masahiko" } } ] }, "title": "First light of the CHARIS high-contrast integral-field spectrograph", "ispublished": "unpub", "full_text_status": "public", "keywords": "Extreme Adaptive Optics, High Contrast Imaging, Integral Field Spectrograph, Exoplanets", "note": "\u00a9 2017 SPIE.\n\nThis work was performed under a Grant-in-Aid for Scientific Research on Innovative Areas from MEXT of the Japanese government (Number 23103002).\n\nPublished - 1040016.pdf
", "abstract": "One of the leading direct Imaging techniques, particularly in ground-based imaging, uses a coronagraphic system and integral field spectrograph (IFS). The Coronagraphic High Angular Resolution Imaging Spectrograph (CHARIS) is an IFS that has been built for the Subaru telescope. CHARIS has been delivered to the observatory and now sits behind the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) system. CHARIS has 'high' and 'low' resolution operating modes. The high-resolution mode is used to characterize targets in J, H, and K bands at R70. The low-resolution prism is meant for discovery and spans J+H+K bands (1.15-2.37 microns) with a spectral resolution of R18. This discovery mode has already proven better than 15-sigma detections of HR8799c,d,e when combining ADI+SDI. Using SDI alone, planets c and d have been detected in a single 24 second image. The CHARIS team is optimizing instrument performance and refining ADI+SDI recombination to maximize our contrast detection limit. In addition to the new observing modes, CHARIS has demonstrated a design with high robustness to spectral crosstalk. CHARIS has completed commissioning and is open for science observations.", "date": "2017-09-01", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "id_number": "CaltechAUTHORS:20180216-091350453", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180216-091350453", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Ministry of Education, Culture, Sports, Science and Technology (MEXT)", "grant_number": "23103002" } ] }, "contributors": { "items": [ { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2273525", "primary_object": { "basename": "1040016.pdf", "url": "https://authors.library.caltech.edu/records/8fjrd-1yn30/files/1040016.pdf" }, "resource_type": "book_section", "pub_year": "2017", "author_list": "Groff, Tyler; Chilcote, Jeffrey; et el." }, { "id": "https://authors.library.caltech.edu/records/mayqs-vxv47", "eprint_id": 97335, "eprint_status": "archive", "datestamp": "2023-08-19 18:16:09", "lastmod": "2024-01-14 21:50:29", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Haynes-R", "name": { "family": "Haynes", "given": "Roger" } }, { "id": "McNamara-P", "name": { "family": "McNamara", "given": "Pam" } }, { "id": "Marcel-J", "name": { "family": "Marcel", "given": "Jackie" } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } } ] }, "title": "Advances in infrared and imaging fibres for astronomical instrumentation", "ispublished": "unpub", "full_text_status": "public", "keywords": "Infrared fibres, imaging fibre bundles, infrared spectroscopy, photonic fibres, fluoride fibres", "note": "\u00a9 2006 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nPublished - 62733U.pdf
Submitted - 0606295.pdf
", "abstract": "Optical fibres have already played a huge part in ground based astronomical instrumentation, however, with the revolution in photonics currently taking place new fibre technologies and integrated optical devices are likely to have a profound impact on the way we manipulate light in the future. The Anglo Australian Observatory, along with partners at the Optical Fibre Technology Centre of the University of Sydney, is investigating some of the developing technologies as part of our Astrophotonics programme. In this paper we discuss the advances that have been made with infrared transmitting fibre, both conventional and microstructured, in particular those based on fluoride glasses. Fluoride glasses have a particularly wide transparent region from the UV through to around 7\u03bcm, whereas silica fibres, commonly used in astronomy, only transmit out to about 2\u03bcm. We discuss the impact of advances in fibre manufacture that have greatly improved the optical, chemical resistance and physical properties of the fluoride fibres. We also present some encouraging initial test results for a modern imaging fibre bundle and imaging fibre taper.", "date": "2006-07-06", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 62733U", "id_number": "CaltechAUTHORS:20190722-160316520", "isbn": "9780819463388", "book_title": "Optomechanical Technologies for Astronomy", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190722-160316520", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Atad-Ettedgui-E", "name": { "family": "Atad-Ettedgui", "given": "Eli" } }, { "id": "Antebi-J", "name": { "family": "Antebi", "given": "Joseph" } }, { "id": "Lemke-D", "name": { "family": "Lemke", "given": "Dietrich" } } ] }, "doi": "10.1117/12.671025", "primary_object": { "basename": "0606295.pdf", "url": "https://authors.library.caltech.edu/records/mayqs-vxv47/files/0606295.pdf" }, "related_objects": [ { "basename": "62733U.pdf", "url": "https://authors.library.caltech.edu/records/mayqs-vxv47/files/62733U.pdf" } ], "resource_type": "book_section", "pub_year": "2006", "author_list": "Haynes, Roger; McNamara, Pam; et el." } ]