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Proceedings Paper

An overview of the NIRSPEC upgrade for the Keck II telescope
Author(s): Emily C. Martin; Michael P. Fitzgerald; Ian S. McLean; Gregory Doppmann; Marc Kassis; Ted Aliado; John Canfield; Chris Johnson; Evan Kress; Kyle Lanclos; Kenneth Magnone; Ji Man Sohn; Eric Wang; Jason Weiss
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Paper Abstract

NIRSPEC is a 1-5 um echelle spectrograph in use on the Keck II Telescope since 1999. The spectrograph is capable of both moderate (R=λ/▵λ~2000) and high (R~25,000) resolution observations and has been a workhorse instrument across many astronomical fields, from planetary science to extragalactic observations. In the latter half of 2018, we will upgrade NIRSPEC to improve the sensitivity and stability of the instrument and increase its lifetime. The major components of the upgrade include replacing the spectrometer and slit-viewing camera detectors with Teledyne H2RG arrays and replacing all transputer-based electronics. We present detailed design, testing, and analysis of the upgraded instrument, including the finalized optomechanical design of the new 1-5 μm slit-viewing camera, detector characterization of the science and Engineering A grade arrays, electronics systems, and updated software design. The optomechanical design of the slit-viewing camera and replacement detector head assembly have both been assembled and cold-tested in our lab. We also show results from the GigE interface to the SAM/ASIC boards to control the H2RG. The upgrade will continue NIRSPEC’s legacy as a powerful near-infrared spectrograph behind one of the world’s most scientifically productive telescopes.

Paper Details

Date Published: 16 August 2018
PDF: 12 pages
Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 107020A (16 August 2018); doi: 10.1117/12.2312266
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)
Gregory Doppmann, W. M. Keck Observatory (United States)
Marc Kassis, W. M. Keck Observatory (United States)
Ted Aliado, Univ. of California, Los Angeles (United States)
John Canfield, Univ. of California, Los Angeles (United States)
Chris Johnson, Univ. of California, Los Angeles (United States)
Evan Kress, Univ. of California, Los Angeles (United States)
Kyle Lanclos, W. M. Keck Observatory (United States)
Kenneth Magnone, Univ. of California, Los Angeles (United States)
Ji Man Sohn, 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. 10702:
Ground-based and Airborne Instrumentation for Astronomy VII
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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