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TRISPEC: A Simultaneous Optical and Near‐Infrared Imager, Spectrograph, and Polarimeter

2005; Institute of Physics; Volume: 117; Issue: 834 Linguagem: Inglês

10.1086/431914

1538-3873

Makoto Watanabe, Hidehiko Nakaya, Tomoyasu Yamamuro, Takahiro Zenno, Miki Ishii, Makoto Okada, Atsushi Yamazaki, Yusuke Yamanaka, Mikio Kurita, Masaru Kino, Ryuta Ijiri, T. Hirao, Tetsuya Nagata, Shuji Sato, Toshihide Kawai, Youko Nakamura, Toshikazu Satō, Noboru Ebizuka, J. H. Hough, A. Chrysostomou,

Astrophysics and Star Formation Studies

We present the design, construction, and performance of TRISPEC (Triple Range Imager and Spectrograph), a simultaneous optical and near‐infrared imager, spectrograph, and polarimeter. This instrument splits the incoming light from a telescope into the three beams—one optical channel (0.45–0.90 μm) and two infrared channels (0.90–1.85 and 1.85–2.5 μm)—by means of two dichroic mirrors. It is capable of simultaneous three‐band imaging or spectroscopy, with or without polarimetry. Low‐resolution grisms (R∼70–360) cover a wide wavelength range of 0.46–2.5 μm, simultaneously. The instrument employs three arrays—one 512 × 512 SITe CCD and two 256 × 256 SBRC InSb arrays—to cover the three channels. It has been commissioned in the imaging, spectroscopic, and polarimetric modes on the United Kingdom Infrared Telescope, the University of Hawaii 2.2 m telescope, and the Okayama Astrophysical Observatory 1.88 m telescope since 1999 June.