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

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

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004spie.5492.1411u&link_type=abstract

Ground-based Instrumentation for Astronomy. Edited by Alan F. M. Moorwood and Iye Masanori. Proceedings of the SPIE, Volume 5492

Astronomy and Astrophysics

Astronomy

2

Scientific paper

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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