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
TL;DR
The Gas Slit Camera (GSC) on MAXI aboard the ISS is a highly sensitive X-ray instrument that scans the entire sky every 92 minutes in the 2-30 keV range, with advanced data processing and calibration.
Contribution
This paper details the design, data processing, and performance specifications of the GSC instrument on MAXI, highlighting its high sensitivity and sky coverage capabilities.
Findings
Achieves the highest sensitivity among X-ray all-sky monitors
Successfully scans the entire sky every 92 minutes
Demonstrates effective on-board data processing and calibration
Abstract
The Gas Slit Camera (GSC) is an X-ray instrument on the MAXI (Monitor of All-sky X-ray Image) mission on 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 counters with the total detector area of 5350 cm. The on-board data processor has functions to format telemetry data as well as to control the high voltage of the proportional counters to protect them from the particle irradiation. The paper describes the instruments, on-board data processing, telemetry data formats, and performance specifications expected from the ground calibration tests.
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