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Proceedings Paper

Four years of good SpeX
Author(s): John T Rayner; Peter M. Onaka; Michael C. Cushing; William D. Vacca
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Paper Abstract

SpeX is a cross-dispersed medium-resolution 0.8-5.5 micron spectrograph in operation at the NASA Infrared Telescope Facility (IRTF) on Mauna Kea, Hawaii. The instrument uses prism cross-dispersers and gratings to provide resolving powers of up to R~2000 simultaneously across 0.8-2.4 micron or ~2-5.4 micron. An autonomous infrared slit-viewer is used for object acquisition, guiding, and scientific imaging. The spectrograph employs a 1024x1024 Aladdin 3 InSb array and the imager a 512x512 Aladdin 2 InSb array. Since it was commissioned in June 2000, SpeX has been used for about 45% of all telescope time. We give an overview of the design, followed by details of the use and performance of the Aladdin arrays, observing techniques, maintenance issues and lessons learned.

Paper Details

Date Published: 30 September 2004
PDF: 12 pages
Proc. SPIE 5492, Ground-based Instrumentation for Astronomy, (30 September 2004); doi: 10.1117/12.551107
Show Author Affiliations
John T Rayner, Univ. of Hawaii (United States)
Peter M. Onaka, Univ. of Hawaii (United States)
Michael C. Cushing, Univ. of Hawaii (United States)
William D. Vacca, Universities Space Research Association (United States)

Published in SPIE Proceedings Vol. 5492:
Ground-based Instrumentation for Astronomy
Alan F. M. Moorwood; Masanori Iye, Editor(s)

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