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First light of the CHARIS high-contrast integral-field spectrograph

Groff, Tyler and Chilcote, Jeffrey and Brandt, Timothy and Kasdin, N. Jeremy and Galvin, Michael and Loomis, Craig and Rizzo, Maxime and Knapp, Gillian and Guyon, Olivier and Jovanovic, Nemanja and Lozi, Julien and Currie, Thayne and Takato, Naruhisa and Hayashi, Masahiko (2017) First light of the CHARIS high-contrast integral-field spectrograph. In: Techniques and Instrumentation for Detection of Exoplanets VIII. Proceedings of SPIE. No.10400. Society of Photo-Optical Instrumentation Engineers , Bellingham, WA, Art. No. 1040016.

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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.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Groff, Tyler0000-0001-5978-3247
Chilcote, Jeffrey0000-0001-6305-7272
Brandt, Timothy0000-0003-2630-8073
Knapp, Gillian0000-0002-9259-1164
Guyon, Olivier0000-0002-1097-9908
Lozi, Julien0000-0002-3047-1845
Currie, Thayne0000-0002-7405-3119
Additional Information:© 2017 SPIE. This work was performed under a Grant-in-Aid for Scientific Research on Innovative Areas from MEXT of the Japanese government (Number 23103002).
Funding AgencyGrant Number
Ministry of Education, Culture, Sports, Science and Technology (MEXT)23103002
Subject Keywords:Extreme Adaptive Optics, High Contrast Imaging, Integral Field Spectrograph, Exoplanets
Series Name:Proceedings of SPIE
Issue or Number:10400
Record Number:CaltechAUTHORS:20180216-091350453
Persistent URL:
Official Citation:Tyler Groff, Jeffrey Chilcote, Timothy Brandt, N. Jeremy Kasdin, Michael Galvin, Craig Loomis, Maxime Rizzo, Gillian Knapp, Olivier Guyon, Nemanja Jovanovic, Julien Lozi, Thayne Currie, Naruhisa Takato, Masahiko Hayashi, "First light of the CHARIS high-contrast integral-field spectrograph", Proc. SPIE 10400, Techniques and Instrumentation for Detection of Exoplanets VIII, 1040016 (1 September 2017); doi: 10.1117/12.2273525;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84864
Deposited By: Tony Diaz
Deposited On:20 Feb 2018 21:28
Last Modified:15 Nov 2021 20:23

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