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Proceedings Paper

The Mt. Fuji submillimeter-wave telescope
Author(s): Yutaro Sekimoto; Yuji Arikawa; Yoshiyuki Aso; Hideo Fujiwara; Masafumi Ikeda; Junji Inatani; Tetsuya Ito; Mituhiro Iwata; Kazuhisa Kamegai; Hiroyuki Maezawa; Takashi Noguchi; Masatoshi Ohishi; Tomoharu Oka; Hiroyuki Ozeki; Gaku Saito; Shuji Saito; Takeshi Sakai; Sheng-Cai Shi; Ken'ichi Tatematsu; Satoshi Yamamoto
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Paper Abstract

The Mt. Fuji submillimeter-wave telescope has been operated since November 1998 to survey neutral atomic carbon (CI) toward the Milky Way. It has a 1.2 m main reflector with a surface accuracy of 10 micrometer in rms. A dual polarization superconductor-insulator-superconductor (SIS) mixer receiver mounted on the Nasmyth focus receives 810/492/345 GHz bands in DSB simultaneously. An acousto-optical spectrometer (AOS) has 1024 channels for 0.8 GHz bandwidth. The telescope was installed with a helicopter and bulldozers at the summit of Mt. Fuji (alt. 3725 m) in July 1998 after a test operation at Nobeyama for a year. It has been remotely operated via a satellite communication from Tokyo or Nobeyama. Atmospheric opacity at Mt. Fuji was 0.4 - 1.0 at 492 GHz in 30% of time and 0.07 - 0.5 at 345 GHz in 60% of time during winter five months. The system noise temperature was typically 1200 K (SSB) at 492 GHz and 500 K (DSB) at 345 GHz. The beam size was measured to be 2.'2 and 3.'1 at 492 and 345 GHz, respectively. We have conducted a large-scale survey of the CI (492 GHz) and CO (3 - 2: 345 GHz) emission from nearby molecular clouds with total area of 10 square degrees. We describe the telescope system and report the performance obtained in the 1998 winter.

Paper Details

Date Published: 3 July 2000
PDF: 12 pages
Proc. SPIE 4015, Radio Telescopes, (3 July 2000); doi: 10.1117/12.390411
Show Author Affiliations
Yutaro Sekimoto, Nobeyama Radio Observatory (Japan)
Yuji Arikawa, Nobeyama Radio Observatory (Japan)
Yoshiyuki Aso, Nobeyama Radio Observatory (Japan)
Hideo Fujiwara, Univ. of Tokyo (Japan)
Masafumi Ikeda, Univ. of Tokyo (Japan)
Junji Inatani, National Space Development Agency of Japan (Japan)
Tetsuya Ito, Univ. of Tokyo (Japan)
Mituhiro Iwata, Univ. of Tokyo (Japan)
Kazuhisa Kamegai, Univ. of Tokyo (Japan)
Hiroyuki Maezawa, Univ. of Tokyo (Japan)
Takashi Noguchi, Nobeyama Radio Observatory (Japan)
Masatoshi Ohishi, National Astronomical Observatory of Japan (Japan)
Tomoharu Oka, Univ. of Tokyo (Japan)
Hiroyuki Ozeki, National Space Development Agency of Japan (Japan)
Gaku Saito, Univ. of Tokyo (Japan)
Shuji Saito, Fukui Univ. (Japan)
Takeshi Sakai, Univ. of Tokyo (Japan)
Sheng-Cai Shi, Purple Mountain Observatory (China)
Ken'ichi Tatematsu, Nobeyama Radio Observatory (Japan)
Satoshi Yamamoto, Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 4015:
Radio Telescopes
Harvey R. Butcher, Editor(s)

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