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Proceedings Paper

Performance and results with the NIRSPEC echelle spectrograph on the Keck II telescope
Author(s): Ian S. McLean; James R. Graham; Eric E. Becklin; Donald Frank Figer; James E. Larkin; N. A. Levenson; Harry I. Teplitz
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Paper Abstract

This paper describes the performance of NIRSPEC, the cryogenic cross-dispersed IR echelle spectrograph for the Keck II telescope on Mauna Kea. NIRSPEC employs a 1024 by 1024 InSb array, diamond-machined metal optics and closed- cycle refrigeration on achieve high throughput and low backgrounds. The instrument operates directly at the f/15 Nasmyth focus, but can also be used in conjunction with the Keck adaptive optics system. First Light was obtained on April 25, 1999. As expected, the performance is detector- limited at short wavelengths and background-limited at longer wavelengths. All of the design goals have been met and result illustrating the optical performance and sensitivity are reported.

Paper Details

Date Published: 16 August 2000
PDF: 8 pages
Proc. SPIE 4008, Optical and IR Telescope Instrumentation and Detectors, (16 August 2000); doi: 10.1117/12.395422
Show Author Affiliations
Ian S. McLean, Univ. of California/Los Angeles (United States)
James R. Graham, Univ. of California/Berkeley (United States)
Eric E. Becklin, Univ. of California/Los Angeles (United States)
Donald Frank Figer, Space Telescope Science Institute (United States)
James E. Larkin, Univ. of California/Los Angeles (United States)
N. A. Levenson, Johns Hopkins Univ. (United States)
Harry I. Teplitz, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 4008:
Optical and IR Telescope Instrumentation and Detectors
Masanori Iye; Alan F. M. Moorwood, Editor(s)

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