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Large X-ray Flares on Stars Detected with MAXI/GSC: A Universal Correlation between the Duration of a Flare and its X-ray Luminosity
Yohko Tsuboi, Kyohei Yamazaki, Yasuharu Sugawara +39
23 giant flares from 13 active stars (eight RS CVn systems, one Algol system, three dMe stars and one YSO) were detected during the first two years of our all-sky X-ray monitoring…
Maxi observations of long X-ray bursts
Motoko Serino, Wataru Iwakiri, Toru Tamagawa +5
We report nine long X-ray bursts from neutron stars, detected with Monitor of All-sky X-ray Image (MAXI). Some of these bursts lasted for hours, and hence are qualified as superbur…
Repetitive Patterns in Rapid Optical Variations in the Nearby Black-hole Binary V404 Cygni
Mariko Kimura, Keisuke Isogai, Taichi Kato +65
How black holes accrete surrounding matter is a fundamental, yet unsolved question in astrophysics. It is generally believed that matter is absorbed into black holes via accretion…
CALET Upper Limits on X-ray and Gamma-ray Counterparts of GW 151226
O. Adriani, Y. Akaike, K. Asano +89
We present upper limits in the hard X-ray and gamma-ray bands at the time of the LIGO gravitational-wave event GW 151226 derived from the CALorimetric Electron Telescope (CALET) ob…
The First MAXI/SSC Catalog of X-ray Sources in 0.7--7.0~keV
Hiroshi Tomida, Daiki Uchida, Hiroshi Tsunemi +5
We present the first source catalog of the Solid-state Slit Camera (SSC) of the Monitor of All-sky X-ray Image (MAXI) mission on the International Space Station, using the 45-month…
MAXI observations of long-term variations of Cygnus X-1 in the low/hard and the high/soft states
Juri Sugimoto, Tatehiro Mihara, Shunji Kitamoto +5
Long-term X-ray variability of the black hole binary, Cygnus X-1, was studied with five years of MAXI data from 2009 to 2014, which include substantial periods of the high/soft sta…