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Proceedings Paper

Development of a new mid-infrared instrument for the TAO 6.5-m Telescope
Author(s): Takashi Miyata; Shigeyuki Sako; Tomohiko Nakamura; Kentaro Asano; Mizuho Uchiyama; Takashi Onaka; Itsuki Sakon; Hirokazu Kataza; Yoshifusa Ita; Tsutomu Aoki; Mamoru Doi; Toshihiro Handa; Daisuke Kato; Kimiaki Kawara; Kotaro Kohno; Masahiro Konishi; Shintaro Koshida; Takeo Minezaki; Natsuko Mitani; Kentaro Motohara; Takao Soyano; Toshihiko Tanabe; Masuo Tanaka; Ken'ichi Tarusawa; Yuzuru Yoshii
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Paper Abstract

Ground-based mid-infrared observations have two distinct advantages over space observations despite relatively lower sensitivity. One is the high spatial resolution and the other is the monitoring capability. These advantages can be emphasized particularly for the next coming ground-based infrared project University of Tokyo Atacama Observatory (TAO). Thanks to the low water vapor of the TAO site (5,640m) and the large aperture of the telescope (6.5meter), we can observe at 30 micron with a spatial resolution of 1 arcsec. It is about ten times higher than that of current space telescopes. The TAO is also useful for monitoring observations because of the ample observing time. To take these advantages we are now developing a new mid-infrared infrared instrument for the TAO 6.5-meter telescope. This covers a wide wavelength range from 2 to 38 micron with three detectors (Si:As, Si:Sb, and InSb). Diffraction limited spatial resolution can be achieved at wavelengths longer than 7 micron. Low-resolution spectroscopy can also be carried out with grisms. This instrument equips a newly invented "field stacker" for monitoring observations. It is an optical system that consists of two movable pick-up mirrors and a triangle shaped mirror, and combine two discrete fields of the telescope into camera's field of view. It will enable us to apply a differential photometry method and dramatically improve the accuracy and increase the feasibility of the monitoring observations at the mid-infrared wavelengths.

Paper Details

Date Published: 20 July 2010
PDF: 8 pages
Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 77353P (20 July 2010); doi: 10.1117/12.856744
Show Author Affiliations
Takashi Miyata, The Univ. of Tokyo (Japan)
Shigeyuki Sako, The Univ. of Tokyo (Japan)
Tomohiko Nakamura, The Univ. of Tokyo (Japan)
Kentaro Asano, The Univ. of Tokyo (Japan)
Mizuho Uchiyama, The Univ. of Tokyo (Japan)
Takashi Onaka, The Univ. of Tokyo (Japan)
Itsuki Sakon, The Univ. of Tokyo (Japan)
Hirokazu Kataza, Institute of Space and Astronautical Science (Japan)
Yoshifusa Ita, National Astronomical Observatory of Japan (Japan)
Tsutomu Aoki, Kiso Observatory, The Univ. of Tokyo (Japan)
Mamoru Doi, The Univ. of Tokyo (Japan)
Toshihiro Handa, The Univ. of Tokyo (Japan)
Daisuke Kato, Institute of Space and Astronautical Science (Japan)
Kimiaki Kawara, The Univ. of Tokyo (Japan)
Kotaro Kohno, The Univ. of Tokyo (Japan)
Masahiro Konishi, The Univ. of Tokyo (Japan)
Shintaro Koshida, The Univ. of Tokyo (Japan)
Takeo Minezaki, The Univ. of Tokyo (Japan)
Natsuko Mitani, The Univ. of Tokyo (Japan)
Kentaro Motohara, The Univ. of Tokyo (Japan)
Takao Soyano, The Univ. of Tokyo (Japan)
Toshihiko Tanabe, The Univ. of Tokyo (Japan)
Masuo Tanaka, The Univ. of Tokyo (Japan)
Ken'ichi Tarusawa, Kiso Observatory, The Univ. of Tokyo (Japan)
Yuzuru Yoshii, 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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