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Title:
Multi-Object Infrared Camera and Spectrograph (MOIRCS) for the Subaru Telescope I. Imaging
Authors:
Suzuki, Ryuji; Tokoku, Chihiro; Ichikawa, Takashi; Uchimoto, Yuka Katsuno; Konishi, Masahiro; Yoshikawa, Tomohiro; Tanaka, Ichi; Yamada, Toru; Omata, Koji; Nishimura, Tetsuo
Affiliation:
AA(Subaru Telescope, National Astronomical Observatory of Japan, 650 North A'ohoku Place, Hilo, HI 96720, USA; Astronomical Institute, Tohoku University, Aramaki, Aoba-ku, Sendai, 980-8578; ) AB(Subaru Telescope, National Astronomical Observatory of Japan, 650 North A'ohoku Place, Hilo, HI 96720, USA; Astronomical Institute, Tohoku University, Aramaki, Aoba-ku, Sendai, 980-8578) AC(Astronomical Institute, Tohoku University, Aramaki, Aoba-ku, Sendai, 980-8578) AD(Subaru Telescope, National Astronomical Observatory of Japan, 650 North A'ohoku Place, Hilo, HI 96720, USA; Astronomical Institute, Tohoku University, Aramaki, Aoba-ku, Sendai, 980-8578; Institute of Astronomy, The University of Tokyo, Osawa, Mitaka, Tokyo 181-0015) AE(Subaru Telescope, National Astronomical Observatory of Japan, 650 North A'ohoku Place, Hilo, HI 96720, USA; Astronomical Institute, Tohoku University, Aramaki, Aoba-ku, Sendai, 980-8578) AF(Subaru Telescope, National Astronomical Observatory of Japan, 650 North A'ohoku Place, Hilo, HI 96720, USA; Astronomical Institute, Tohoku University, Aramaki, Aoba-ku, Sendai, 980-8578) AG(Subaru Telescope, National Astronomical Observatory of Japan, 650 North A'ohoku Place, Hilo, HI 96720, USA; Astronomical Institute, Tohoku University, Aramaki, Aoba-ku, Sendai, 980-8578) AH(Subaru Telescope, National Astronomical Observatory of Japan, 650 North A'ohoku Place, Hilo, HI 96720, USA; Astronomical Institute, Tohoku University, Aramaki, Aoba-ku, Sendai, 980-8578) AI(Subaru Telescope, National Astronomical Observatory of Japan, 650 North A'ohoku Place, Hilo, HI 96720, USA) AJ(Subaru Telescope, National Astronomical Observatory of Japan, 650 North A'ohoku Place, Hilo, HI 96720, USA)
Publication:
Publications of the Astronomical Society of Japan, Vol.60, No.6, pp.1347--1362 (PASJ Homepage)
Publication Date:
12/2008
Origin:
PASJ
Keywords:
infrared: general, instrumentation: detectors
Bibliographic Code:
2008PASJ...60.1347S

Abstract

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.
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