1 September 2017 First light of the CHARIS high-contrast integral-field spectrograph
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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.
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Tyler Groff, Tyler Groff, Jeffrey Chilcote, Jeffrey Chilcote, Timothy Brandt, Timothy Brandt, N. Jeremy Kasdin, N. Jeremy Kasdin, Michael Galvin, Michael Galvin, Craig Loomis, Craig Loomis, Maxime Rizzo, Maxime Rizzo, Gillian Knapp, Gillian Knapp, Olivier Guyon, Olivier Guyon, Nemanja Jovanovic, Nemanja Jovanovic, Julien Lozi, Julien Lozi, Thayne Currie, Thayne Currie, Naruhisa Takato, Naruhisa Takato, Masahiko Hayashi, 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; https://doi.org/10.1117/12.2273525
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