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Proceedings Article

OSIRIS: a diffraction limited integral field spectrograph for Keck

[+] Author Affiliations
James Larkin, Matthew Barczys, Ted Aliado, George Brims, John Canfield, Chris Johnson, Evan Kress, Ken Magnone, Nick Magnone, Michael McElwain, Juleen Moon, Gunnar Skulason, Michael Spencer, Jason Weiss, Shelley Wright

Univ. of California, Los Angeles

Alfred Krabbe, Christof Iserlohe

Univ. Köln (Germany)

Sean Adkins, Paola Amico, Randy Campbell, Allan Honey, James Lyke

California Association for Research in Astronomy

Thomas Gasaway

Space Sciences Lab, Univ. of California, San Diego

David LaFreniere

Univ. de Montréal (Canada)

Andreas Quirrenbach

Sterrewacht Leiden (Netherlands)

Inseok Song

Gemini Observatory

Proc. SPIE 6269, Ground-based and Airborne Instrumentation for Astronomy, 62691A (June 28, 2006); doi:10.1117/12.672061
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From Conference Volume 6269

  • Ground-based and Airborne Instrumentation for Astronomy
  • Ian S. McLean; Masanori Iye
  • Orlando, Florida , USA | May 24, 2006

abstract

We present an overview of the OSIRIS integral field spectrograph which was recently commissioned on the Keck II Telescope. OSIRIS works with the Keck Adaptive Optics system and utilizes an infrared transmissive lenslet array to sample a rectangular field of view at close to the Keck diffraction limit. By packing the spectra close together (2 pixel rows per spectrum) and using the Rockwell Hawaii-2 detector (wavelengths between 1 and 2.5 microns), we achieve a relatively large field of view (up to 6."4) while maintaining full broad-band spectral coverage at a resolution of 3800. Among the challenges of the instrument are: a fully cryogenic design (approximately 250 kg are brought down to 55K); four spatial scales from 0."02 to 0."10; extremely low wavefront error (approximately 25 nm of non-common path error); large all aluminum optics for the spectrograph; extremely repeatable spectral formats; and a sophisticated data reduction pipeline. OSIRIS also serves as a starting point for our design of IRIS which is a planned integral field spectrograph for the Thirty Meter Telescope.

© (2006) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

James Larkin ; Matthew Barczys ; Alfred Krabbe ; Sean Adkins ; Ted Aliado, et al.
"OSIRIS: a diffraction limited integral field spectrograph for Keck", Proc. SPIE 6269, Ground-based and Airborne Instrumentation for Astronomy, 62691A (June 28, 2006); doi:10.1117/12.672061; http://dx.doi.org/10.1117/12.672061


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