Publications (67)
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…
Sudden End of X-Ray Outbursts around Periastron of Circinus X-1 Observed with MAXI
Kazumi Asai, Tatehiro Mihara, Masaru Matsuoka +5
MAXI/GSC observed 21 outbursts from Circinus X-1 between 2009 August and 2013 December. Although 14 outbursts showed ordinary gradual decays, in 7 outbursts we found sudden luminos…
Multiwavelength Observations of the Black Hole X-ray Binary MAXI J1820070 in the Rebrightening Phase
Tomohiro Yoshitake, Megumi Shidatsu, Yoshihiro Ueda +14
We report the results of quasi-simultaneous multiwavelength (near-infrared, optical, UV, and X-ray) observations of the Galactic X-ray black hole binary MAXI J1820+070 performed in…
X-ray and Optical Monitoring of State Transitions in MAXI J1820+070
Megumi Shidatsu, Satoshi Nakahira, Katsuhiro L. Murata +4
We report results from the X-ray and optical monitoring of the black hole candidate MAXI J1820+070 (=ASSASN-18ey) over the entire period of its outburst from March to October 2018.…
MAXI observations of GRBs
Motoko Serino, Takanori Sakamoto, Nobuyuki Kawai +40
Monitor of all-sky image (MAXI) Gas Slit Camera (GSC) detects gamma-ray bursts (GRBs) including the bursts with soft spectra, such as X-ray flashes (XRFs). MAXI/GSC is sensitive to…
Accretion spin-up and a strong magnetic field in the slow-spinning Be X-ray binary MAXI J0655-013
Sean N. Pike, Mutsumi Sugizaki, Jakob van den Eijnden +8
We present MAXI and NuSTAR observations of the Be X-ray binary, MAXI J0655-013, in outburst. NuSTAR observed the source once early in the outburst, when spectral analysis yields a…