Scientific design of a high contrast integral field spectrograph for the Subaru telescope

Michael W. McElwain, Timothy D. Brandt, Markus Janson, Gillian R. Knapp, Mary Anne Peters, Adam S. Burrows, Alexis Carlotti, Michael A. Carr, Tyler Groff, James E. Gunn, Olivier Guyon, Masahiko Hayashi, N. Jeremy Kasdin, Masayuki Kuzuhara, Robert H. Lupton, Frantz Martinache, David Spiegel, Naruhisa Takato, Motohide Tamura, Edwin Lewis TurnerRobert J. Vanderbeib

Research output: Chapter in Book/Report/Conference proceedingConference contribution

22 Scopus citations


Ground-based telescopes equipped with adaptive-optics (AO) systems and specialized science cameras are now capable of directly detecting extrasolar planets. We present the expected scientific capabilities of CHARIS, the Coronagraphic High Angular Resolution Imaging Spectrograph, which is being built for the Subaru 8.2 m telescope of the National Astronomical Observatory of Japan. CHARIS will be implemented behind the new extreme adaptive optics system at Subaru, SCExAO, and the existing 188-actuator system AO188. CHARIS will offer three observing modes over near-infrared wavelengths from 0.9 to 2.4 μm (the y-, J-, H-, and K-bands), including a low-spectral-resolution mode covering this entire wavelength range and a high-resolution mode within a single band. With these capabilities, CHARIS will offer exceptional sensitivity for discovering giant exoplanets, and will enable detailed characterization of their atmospheres. CHARIS, the only planned high-contrast integral field spectrograph on an 8m-class telescope in the Northern Hemisphere, will complement the similar instruments such as Project 1640 at Palomar, and GPI and SPHERE in Chile.

Original languageEnglish (US)
Title of host publicationGround-Based and Airborne Instrumentation for Astronomy IV
StatePublished - 2012
EventGround-Based and Airborne Instrumentation for Astronomy IV - Amsterdam, Netherlands
Duration: Jul 1 2012Jul 6 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherGround-Based and Airborne Instrumentation for Astronomy IV

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


  • Adaptive optics
  • Coronagraphy
  • Exoplanets
  • High contrast imaging
  • Integral field spectrograph


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