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Proceedings Paper

Performance modeling of an upgraded NIRSPEC on Keck
Author(s): Emily C. Martin; Michael P. Fitzgerald; Ian S. McLean; Sean M. Adkins; Ted Aliado; George Brims; Chris Johnson; Ken Magnone; Eric Wang; Jason Weiss
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Paper Abstract

NIRSPEC is a high-resolution near-infrared (1-5 micron) echelle spectrometer in use on the Keck II telescope. We are designing an upgrade to the spectrometer, and here we present modeling for the expected performance of the upgraded system. The planned upgrade will (1) replace the Aladdin III science detector with a Teledyne H2RG, (2) update the slitviewing camera (SCAM) detector to an H1RG and replace the optics, and (3) upgrade the instrument control electronics. The new spectrometer detector has smaller pixels but a larger format, and its improved noise characteristics will provide a dramatic increase in sensitivity, especially between OH lines in H-band and shorter wavelengths. Optical modeling shows that the upgraded system is expected to achieve higher spectral resolution and a larger spectral grasp. Also, preliminary modeling of the SCAM optical design aims to permit operation from 1-5 μm, overcoming a limitation with the existing system.

Paper Details

Date Published: 28 July 2014
PDF: 7 pages
Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 914781 (28 July 2014); doi: 10.1117/12.2056896
Show Author Affiliations
Emily C. Martin, Univ. of California, Los Angeles (United States)
Michael P. Fitzgerald, Univ. of California, Los Angeles (United States)
Ian S. McLean, Univ. of California, Los Angeles (United States)
Sean M. Adkins, W. M. Keck Observatory (United States)
Ted Aliado, Univ. of California, Los Angeles (United States)
George Brims, Univ. of California, Los Angeles (United States)
Chris Johnson, Univ. of California, Los Angeles (United States)
Ken Magnone, Univ. of California, Los Angeles (United States)
Eric Wang, Univ. of California, Los Angeles (United States)
Jason Weiss, Univ. of California, Los Angeles (United States)


Published in SPIE Proceedings Vol. 9147:
Ground-based and Airborne Instrumentation for Astronomy V
Suzanne K. Ramsay; Ian S. McLean; Hideki Takami, Editor(s)

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