In-orbit performance of the Suzaku wide-band all-sky monitor

Kazutaka Yamaoka*, Satoshi Sugita, Masanori Ohno, Takuya Takahashi, Yasushi Fukazawa, Yukikatsu Terada, Tohru Tamagawa, Keiichi Abe, Yasuhiko Endo, Kaori Onda, Satoshi Matsumura, Makoto Tashiro, Hong Soojirig, Goro Sato, Kazuhiro Nakazawa, Tadayuki Takahashi, Ryohei Miyawaki, Teruaki Enoto, Motohide Kokubun, Kazuo MakishimaToshio Murakami

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


The X-ray astronomical satellite Suzaku was successfully launched in July 2005. The onboard Wideband All-sky Monitor (WAM) is designed as the second function of the large, thick BGO anti-coincidence shields of the Hard X-ray Detectors (HXD). It views about half of the whole sky and has a geometrical area of 800 cm2 per side, with a large effective area of 400 cm 2 even at 1 MeV. Hence, the WAM is expected to provide unique opportunities to detect high energy emission from GRBs and solar flares in the MeV range. In fact, the WAM has detected at least 47 GRBs, although the fine-tuning of the GRB functions is still in progress. The most impressive GRB result is the bright, hard spectrum GRB 051008, which was detected up to 1 MeV with the WAM. We will present here the in-flight performance of the HXD/WAM during the initial eight-months of operations. The in-flight energy response, spectral and timing capabilities, and in-orbit background are described in this paper.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume6266 II
Publication statusPublished - 2006
EventSpace Telescopes and Instrumentation II: Ultraviolet to Gamma Ray - Orlando, FL
Duration: 2006 May 242006 May 31


OtherSpace Telescopes and Instrumentation II: Ultraviolet to Gamma Ray
CityOrlando, FL


  • Gamma-ray Astronomy
  • Gamma-ray bursts
  • Space Instrumentation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics


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