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Published September 1, 2017 | Version Published
Book Section - Chapter Open

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

Creators

  • 1. ROR icon Goddard Space Flight Center
  • 2. ROR icon University of Toronto
  • 3. ROR icon University of California, Santa Barbara
  • 4. ROR icon Princeton University
  • 5. ROR icon National Astronomical Observatory of Japan

Contributors

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.

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).

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Additional details

Identifiers

Eprint ID
84864
Resolver ID
CaltechAUTHORS:20180216-091350453

Funding

Ministry of Education, Culture, Sports, Science and Technology (MEXT)
23103002

Dates

Created
2018-02-20
Created from EPrint's datestamp field
Updated
2021-11-15
Created from EPrint's last_modified field

Caltech Custom Metadata

Series Name
Proceedings of SPIE
Series Volume or Issue Number
10400