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SCExAO: a testbed for developing high-contrast imaging technologies for ELTs

Ahn, Kyohoon and Guyon, Olivier and Lozi, Julien and Vievard, Sébastien and Deo, Vincent and Skaf, Nour and Belikov, Ruslan and Bos, Steven P. and Bottom, Michael and Currie, Thayne and Frazin, Richard and Gorkom, Kyle V. and Groff, Tyler D. and Haffert, Sebastiaan Y. and Jovanovic, Nemanja and Kawahara, Hajime and Kotani, Takayuki and Males, Jared R. and Martinache, Frantz and Mazin, Ben and Miller, Kelsey and Norris, Barnaby and Rodack, Alexander and Wong, Alison (2021) SCExAO: a testbed for developing high-contrast imaging technologies for ELTs. In: Techniques and Instrumentation for Detection of Exoplanets X. Proceedings of SPIE. No.11823. Society of Photo-optical Instrumentation Engineers , Bellingham, WA, Art. No. 1182303. ISBN 9781510644847.

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To directly detect exoplanets and protoplanetary disks, the development of high accuracy wavefront sensing and control (WFS&C) technologies is essential, especially for ground-based Extremely Large Telescopes (ELTs). The Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument is a high-contrast imaging platform to discover and characterize exoplanets and protoplanetary disks. It also serves as a testbed to validate and deploy new concepts or algorithms for high-contrast imaging approaches for ELTs, using the latest hardware and software technologies on an 8-meter class telescope. SCExAO is a multi-band instrument, using light from 600 to 2500 nm, and delivering a high Strehl ratio (>80% in median seeing in H-band) downstream of a low-order correction provided by the facility AO188. Science observations are performed with coronagraphs, an integral field spectrograph, or single aperture interferometers. The SCExAO project continuously reaches out to the community for development and upgrades. Existing operating testbeds such as the SCExAO are also unique opportunities to test and deploy the new technologies for future ELTs. We present and show a live demonstration of the SCExAO capabilities (Real-time predictive AO control, Focal plane WFS&C, etc) as a host testbed for the remote collaborators to test and deploy the new WFS&C concepts or algorithms. We also present several high-contrast imaging technologies that are under development or that have already been demonstrated on-sky.

Item Type:Book Section
Related URLs:
URLURL TypeDescription Paper
Ahn, Kyohoon0000-0002-1094-852X
Guyon, Olivier0000-0002-1097-9908
Lozi, Julien0000-0002-3047-1845
Vievard, Sébastien0000-0003-4018-2569
Deo, Vincent0000-0003-4514-7906
Skaf, Nour0000-0002-9372-5056
Bottom, Michael0000-0003-1341-5531
Currie, Thayne0000-0002-7405-3119
Groff, Tyler D.0000-0001-5978-3247
Haffert, Sebastiaan Y.0000-0001-5130-9153
Jovanovic, Nemanja0000-0001-5213-6207
Kawahara, Hajime0000-0003-3309-9134
Kotani, Takayuki0000-0001-6181-3142
Males, Jared R.0000-0002-2346-3441
Martinache, Frantz0000-0003-1180-4138
Mazin, Ben0000-0003-0526-1114
Norris, Barnaby0000-0002-8352-7515
Additional Information:© 2021 Society of Photo-Optical Instrumentation Engineers (SPIE). This work is based on data collected at Subaru Telescope, which is operated by the National Astronomical Observatory of Japan. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. The authors also wish to acknowledge the critical importance of the current and recent Subaru Observatory daycrew, technicians, telescope operators, computer support, and office staff employees. Their expertise, ingenuity, and dedication is indispensable to the continued successful operation of these observatories. The development of SCExAO was supported by the Japan Society for the Promotion of Science (Grant-in-Aid for Research #23340051, #26220704, #23103002, #19H00703 & #19H00695), the Astrobiology Center of the National Institutes of Natural Sciences, Japan, the Mt Cuba Foundation and the director’s contingency fund at Subaru Telescope. KA acknowledges support from the Heising-Simons foundation.
Funding AgencyGrant Number
Japan Society for the Promotion of Science (JSPS)23340051
Japan Society for the Promotion of Science (JSPS)26220704
Japan Society for the Promotion of Science (JSPS)23103002
Japan Society for the Promotion of Science (JSPS)19H00703
Japan Society for the Promotion of Science (JSPS)19H00695
National Institutes of Natural Sciences of JapanUNSPECIFIED
Mt. Cuba Astronomical FoundationUNSPECIFIED
Subaru TelescopeUNSPECIFIED
Heising-Simons FoundationUNSPECIFIED
Subject Keywords:Exoplanet, Extreme Adaptive Optics, Astronomical Instrumentation, Coronagraphy, High-Contrast Imaging, Wavefront Sensing&Control
Series Name:Proceedings of SPIE
Issue or Number:11823
Record Number:CaltechAUTHORS:20211006-191556283
Persistent URL:
Official Citation:Kyohoon Ahn, Olivier Guyon, Julien Lozi, Sébastien Vievard, Vincent Deo, Nour Skaf, Ruslan Belikov, Steven P. Bos, Michael Bottom, Thayne Currie, Richard Frazin, Kyle V. Gorkom, Tyler D. Groff, Sebastiaan Y. Haffert, Nemanja Jovanovic, Hajime Kawahara, Takayuki Kotani, Jared R. Males, Frantz Martinache, Ben Mazin, Kelsey Miller, Barnaby Norris, Alexander Rodack, and Alison Wong "SCExAO: a testbed for developing high-contrast imaging technologies for ELTs", Proc. SPIE 11823, Techniques and Instrumentation for Detection of Exoplanets X, 1182303 (1 September 2021);
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:111250
Deposited By: Tony Diaz
Deposited On:06 Oct 2021 20:16
Last Modified:06 Oct 2021 20:16

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