20 July 2010 Development of a new mid-infrared instrument for the TAO 6.5-m Telescope
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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.
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Takashi Miyata, Takashi Miyata, Shigeyuki Sako, Shigeyuki Sako, Tomohiko Nakamura, Tomohiko Nakamura, Kentaro Asano, Kentaro Asano, Mizuho Uchiyama, Mizuho Uchiyama, Takashi Onaka, Takashi Onaka, Itsuki Sakon, Itsuki Sakon, Hirokazu Kataza, Hirokazu Kataza, Yoshifusa Ita, Yoshifusa Ita, Tsutomu Aoki, Tsutomu Aoki, Mamoru Doi, Mamoru Doi, Toshihiro Handa, Toshihiro Handa, Daisuke Kato, Daisuke Kato, Kimiaki Kawara, Kimiaki Kawara, Kotaro Kohno, Kotaro Kohno, Masahiro Konishi, Masahiro Konishi, Shintaro Koshida, Shintaro Koshida, Takeo Minezaki, Takeo Minezaki, Natsuko Mitani, Natsuko Mitani, Kentaro Motohara, Kentaro Motohara, Takao Soyano, Takao Soyano, Toshihiko Tanabe, Toshihiko Tanabe, Masuo Tanaka, Masuo Tanaka, Ken'ichi Tarusawa, Ken'ichi Tarusawa, Yuzuru Yoshii, Yuzuru Yoshii, "Development of a new mid-infrared instrument for the TAO 6.5-m Telescope", Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 77353P (20 July 2010); doi: 10.1117/12.856744; https://doi.org/10.1117/12.856744
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