MAXI: all-sky observation from the International Space Station
Tatehiro Mihara, Mutsumi Sugizaki, Masaru Matsuoka, Hiroshi Tomida,, Shiro Ueno, Hitoshi Negoro, Atsumasa Yoshida, Hiroshi Tsunemi, Motoki, Nakajima, Yoshihiro Ueda, Makoto Yamauchi

TL;DR
MAXI is an all-sky X-ray monitor on the ISS that has been detecting and cataloging X-ray sources since 2009, despite technical challenges, and has discovered several new black holes and X-ray phenomena.
Contribution
This paper reports the operational experience, technical challenges, and scientific discoveries of MAXI, including the detection of new black holes and diffuse X-ray emissions over 4.5 years.
Findings
Detected 500 sources above ~0.6 mCrab in 4-10 keV
Discovered 6 of 12 new black holes
Identified two types of outburst behaviors in black holes
Abstract
Monitor of All-sky X-ray Image (MAXI) is mounted on the International Space Station (ISS). Since 2009 it has been scanning the whole sky in every 92 minutes with ISS rotation. Due to high particle background at high latitude regions the carbon anodes of three GSC cameras were broken. We limit the GSC operation to low-latitude region around equator. GSC is suffering a double high background from Gamma-ray altimeter of Soyuz spacecraft. MAXI issued the 37-month catalog with 500 sources above ~0.6 mCrab in 4-10 keV. MAXI issued 133 to Astronomers Telegram and 44 to Gammaray burst Coordinated Network so far. One GSC camera had a small gas leak by a micrometeorite. Since 2013 June, the 1.4 atm Xe pressure went down to 0.6 atm in 2014 May 23. By gradually reducing the high voltage we keep using the proportional counter. SSC with X-ray CCD has detected diffuse soft X-rays in the all-sky, such…
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