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Proceedings Paper

Design and status of a near-infrared multi-object spectrograph for the TAO 6.5-m Telescope
Author(s): Masahiro Konishi; Kentaro Motohara; Mamoru Doi; Shigeyuki Sako; Koji Toshikawa; Natsuko Mitani; Tsutomu Aoki; Toshihiro Handa; Yoshifusa Ita; Daisuke Kato; Kimiaki Kawara; Kotaro Kohno; Shintaro Koshida; Takeo Minezaki; Takashi Miyata; Takao Soyano; Toshihiko Tanabe; Masuo Tanaka; Ken'ichi Tarusawa; Yuzuru Yoshii
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Paper Abstract

We describe the design and current status of a near-infrared multi-object spectrograph for the University of Tokyo Atacama Observatory (TAO) project, which is to construct a 6.5m infrared telescope on the summit of Co. Chajnantor (altitude of 5,460m) in the northern Chile. The instrument, named SWIMS (Simultaneous-color Wide-field Infrared Multi-object Spectrograph), covers a wavelength range from 0.9 to 2.5 μm with a field of view of 9.6 in diameter using 4096 × 4096 pixels with a pixel scale of 0.13 pixel-1. It has two observation modes: a wide-field imager and a multi-object spectrograph (MOS). The MOS mode adopts cooled multi-slit masks with 30 slits at a maximum, and achieves a spectral resolution of λ/▵λ~ 1000. Up to 20 masks can be installed in a mask storage dewar. In both modes, two wavelength ranges of 0.9-1.4 μm and 1.4-2.5 μm are observed simultaneously with a dichroic mirror placed in the collimated beam. This will provide us data covering the wide spectral range under same conditions such as weather, telescope pointing, and so on. Such data are important not only for redshift surveys of distant galaxies but also for rapidly time-variable events such as gamma-ray bursts. As SWIMS is expected to be completed before the construction of the 6.5m telescope, we plan to carry out performance verification and early scientific observations on the Subaru Telescope at Hawaii.

Paper Details

Date Published: 20 July 2010
PDF: 8 pages
Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 77356T (20 July 2010); doi: 10.1117/12.856230
Show Author Affiliations
Masahiro Konishi, Institute of Astronomy, The Univ. of Tokyo (Japan)
Kentaro Motohara, Institute of Astronomy, The Univ. of Tokyo (Japan)
Mamoru Doi, Institute of Astronomy, The Univ. of Tokyo (Japan)
Shigeyuki Sako, Institute of Astronomy, The Univ. of Tokyo (Japan)
Koji Toshikawa, Institute of Astronomy, The Univ. of Tokyo (Japan)
Natsuko Mitani, Institute of Astronomy, The Univ. of Tokyo (Japan)
Tsutomu Aoki, Kiso Observatory, The Univ. of Tokyo (Japan)
Toshihiro Handa, Institute of Astronomy, The Univ. of Tokyo (Japan)
Yoshifusa Ita, National Astronomical Observatory of Japan (Japan)
Astronomical Institute, Tohoku Univ. (Japan)
Daisuke Kato, The Univ. of Tokyo (Japan)
Institute of Space and Astronautical Science (Japan)
Kimiaki Kawara, Institute of Astronomy, The Univ. of Tokyo (Japan)
Kotaro Kohno, Institute of Astronomy, The Univ. of Tokyo (Japan)
Shintaro Koshida, Institute of Astronomy, The Univ. of Tokyo (Japan)
Takeo Minezaki, Institute of Astronomy, The Univ. of Tokyo (Japan)
Takashi Miyata, Institute of Astronomy, The Univ. of Tokyo (Japan)
Takao Soyano, Kiso Observatory, The Univ. of Tokyo (Japan)
Toshihiko Tanabe, Institute of Astronomy, The Univ. of Tokyo (Japan)
Masuo Tanaka, Institute of Astronomy, The Univ. of Tokyo (Japan)
Ken'ichi Tarusawa, Kiso Observatory, The Univ. of Tokyo (Japan)
Yuzuru Yoshii, Institute of Astronomy, The Univ. of Tokyo (Japan)


Published in SPIE Proceedings Vol. 7735:
Ground-based and Airborne Instrumentation for Astronomy III
Ian S. McLean; Suzanne K. Ramsay; Hideki Takami, Editor(s)

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