A high-efficiency near-infrared spectrograph for the Apache Point 3.5 m telescope

Alan Uomoto; Stephen A. Smee; Robert H. Barkhouser

doi:10.1117/12.552841

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30 September 2004 A high-efficiency near-infrared spectrograph for the Apache Point 3.5 m telescope

Alan Uomoto, Stephen A. Smee, Robert H. Barkhouser

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Proceedings Volume 5492, Ground-based Instrumentation for Astronomy; (2004) https://doi.org/10.1117/12.552841
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

Abstract

A point-source spectrograph under development for the APO 3.5 m telescope offers resolving powers (R = λ/Δλ) of 1000 and 4000 in the near-IR (0.85-2.5 μm) while using wide slits matched to the seeing disk. The use of diamond-turned aluminum and crystal optics in a straightforward optical path coupled with a Hawaii-1RG detector provides excellent end-to-end efficiency of 32%-39% (including the telescope optics). Designed primarily for follow-up studies of brown dwarf and high redshift quasar candidates identified by wide-field surveys such as SDSS and 2MASS, this instrument will afford the 3.5 m telescope superb capability for a wide variety of science programs. In this paper we present the goals and design of the spectrograph and its expected performance.

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Alan Uomoto, Stephen A. Smee, and Robert H. Barkhouser "A high-efficiency near-infrared spectrograph for the Apache Point 3.5 m telescope", Proc. SPIE 5492, Ground-based Instrumentation for Astronomy, (30 September 2004); https://doi.org/10.1117/12.552841

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