Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008pasj...60.1347s&link_type=abstract
Publications of the Astronomical Society of Japan, Vol.60, No.6, pp.1347--1362
Astronomy and Astrophysics
Astronomy
37
Infrared: General, Instrumentation: Detectors
Scientific paper
MOIRCS is a fully cryogenic near-infrared instrument for the 8.2 m Subaru Telescope. MOIRCS has two observation modes: a wide-field imaging mode and a multiobject spectroscopy mode. This paper describes the imaging mode, its specifications, and actual performances that we confirmed through laboratory tests and commissioning observations. The imaging mode provides a 4' × 7' field of view with a pixel scale of 0''.117pixel-1 in the wavelength range of 0.85 to 2.5 µm using cooled optics and two 2048 × 2048 HgCdTe HAWAII-2 focal plane arrays. Good-quality images are obtained over the entire field of view with practically no chromatic aberration. The limiting magnitudes for a point source estimated from observed background brightness and throughput are 23.7 in the J band, 23.0 in the H, and 22.6 in the KS band (Vega) with S / N = 5, 0''.5 seeing, 1''.0 aperture, and 1hr exposure.
Ichikawa Takashi
Konishi Masahiro
Nishimura Tetsuo
Omata Koji
Suzuki Ryuji
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