Gas slit camera (GSC) onboard MAXI on ISS

Tatehiro Mihara*, Motoki Nakajima, Mutsumi Sugizaki, Motoko Serino, Masaru Matsuoka, Mitsuhiro Kohama, Kazuyoshi Kawasaki, Hiroshi Tomida, Shiro Ueno, Nobuyuki Kawai, Jun Kataoka, Mikio Morii, Atsumasa Yoshida, Kazutaka Yamaoka, Satoshi Nakahira, Hitoshi Negoro, Naoki Isobe, Makoto Yamauchi, Ikuya Sakurai

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

127 Citations (Scopus)


The Gas Slit Camera (GSC) is an X-ray instrument on the MAXI (Monitor of All-sky X-ray Image) mission aboard the International Space Station. It is designed to scan the entire sky every 92-minute orbital period in the 2-30 keV band and to achieve the highest sensitivity among the X-ray all-sky monitors ever flown so far. The GSC employs large-area position-sensitive proportional counterswith a total detector area of 5350cm2. The on-board data processor has functions to format telemetry data as well as to control the high voltage of the proportional counters so as to protect them from particle irradiation. This paper describes the instruments, on-board data processing, telemetry data formats, and performance specifications expected from ground calibration tests.

Original languageEnglish
Pages (from-to)S623-S634
JournalPublications of the Astronomical Society of Japan
Issue numberSPEC. ISSUE 3
Publication statusPublished - 2011 Nov 25


  • Instrumentation: Detectors
  • Space vehicles: Instruments
  • X-rays: General

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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