OSIRIS: a diffraction limited integral field spectrograph for Keck
| Autor: | David Lafrenière, Evan Kress, Gunnar E. Skulason, Inseok Song, Michael W. McElwain, James E. Larkin, Allan Honey, Alfred Krabbe, George Brims, Michael Spencer, John Canfield, Nick Magnone, Jason Weiss, Thomas M. Gasaway, Matthew Barczys, Shelley A. Wright, Sean M. Adkins, James E. Lyke, Ted Aliado, Ken Magnone, Juleen Moon, Christof Iserlohe, Chris Johnson, Andreas Quirrenbach, Randy Campbell, Paola Amico |
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| Rok vydání: | 2006 |
| Předmět: |
Wavefront
Physics business.industry Astrophysics::Instrumentation and Methods for Astrophysics Field of view Astrophysics::Cosmology and Extragalactic Astrophysics law.invention Telescope Optics Integral field spectrograph law Astrophysics::Earth and Planetary Astrophysics Spectral resolution business Adaptive optics Spectrograph Astrophysics::Galaxy Astrophysics Thirty Meter Telescope |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.672061 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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