1996•Publications of the Astronomical Society of JapanRequires access
The IRTS (Infrared Telescope in Space) Mission
Hiroshi Murakami, Minoru M. Freund, Ken M. Ganga, Hongfeng Guo, T. Hirao, Norihisa Hiromoto, Mitsunobu Kawada, Andrew E. Lange, Sin’itirou Makiuti, Hideo Matsuhara, Toshio Matsumoto, Shuji Matsuura, Masahide Murakami, Takao Nakagawa, Masanao Narita, Manabu Noda, Haruyuki Okuda, Kenichi Okumura, Takashi Onaka, Thomas L. Roellig, Shinji Sato, Hiroshi Shibai, Beverly J. Smith, Toshihiko Tanabé, Masahiro Tanaka, Toyoki Watabe, I. Yamamura, Lunming Yuen
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Abstract
The Japanese satellite-borne infrared telescope, the Infrared Telescope in Space (IRTS), has completed a successful survey of a portion of the infrared sky. The IRTS consists of a 15 cm telescope cooled with superfluid liquid helium, and is installed on board the Space Flyer Unit (SFU) spacecraft. The SFU was launched on 1995 March 18 UT. The sky survey by the IRTS started on March 29 UT, and was completed on April 25 UT after exhausting its liquid helium. The cryogenic system operated as designed, and maintained the telescope and the focal-plane instruments at a stable temperature of 1.9 K for 38 days. The four focal-plane instruments, which together covered almost the entire infrared wavelength range, observed a sky area of about 2700 deg2 and returned a wealth of new data on a variety of objects, including the zodiacal light, interstellar gas and dust, near-infrared cosmic background light and point sources.