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Proceedings Paper

First light of the CHARIS high-contrast integral-field spectrograph
Author(s): 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
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Paper 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.

Paper Details

Date Published: 1 September 2017
PDF: 6 pages
Proc. SPIE 10400, Techniques and Instrumentation for Detection of Exoplanets VIII, 1040016 (1 September 2017); doi: 10.1117/12.2273525
Show Author Affiliations
Tyler Groff, NASA Goddard Space Flight Ctr. (United States)
Jeffrey Chilcote, Univ. of Toronto (Canada)
Timothy Brandt, Univ. of California, Santa Barbara (United States)
N. Jeremy Kasdin, Princeton Univ. (United States)
Michael Galvin, Princeton Univ. (United States)
Craig Loomis, Princeton Univ. (United States)
Maxime Rizzo, NASA Goddard Space Flight Ctr. (United States)
Gillian Knapp, Princeton Univ. (United States)
Olivier Guyon, Subaru Telescope, National Astronomical Observatory of Japan (United States)
Nemanja Jovanovic, California Institute of Technology (United States)
Julien Lozi, Subaru Telescope, National Astronomical Observatory of Japan (United States)
Thayne Currie, Subaru Telescope, National Astronomical Observatory of Japan (United States)
Naruhisa Takato, Subaru Telescope, National Astronomical Observatory of Japan (United States)
Masahiko Hayashi, Subaru Telescope, National Astronomical Observatory of Japan (Japan)


Published in SPIE Proceedings Vol. 10400:
Techniques and Instrumentation for Detection of Exoplanets VIII
Stuart Shaklan, Editor(s)

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