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NuSTAR Discovery of Dead Quasar Engine in Arp 187
Kohei Ichikawa, Taiki Kawamuro, Megumi Shidatsu +7
Recent active galactic nucleus (AGN) and quasar surveys have revealed a population showing rapid AGN luminosity variability by a factor of . Here we present the most drasti…
X-ray and Optical Observations of the Black Hole Candidate MAXI J1828-249
Sonoe Oda, Megumi Shidatsu, Satoshi Nakahira +8
We report results from X-ray and optical observations of the Galactic black hole candidate MAXI J1828-249, performed with Suzaku and the Kanata telescope around the X-ray flux peak…
Application of the Thermal Wind Model to Absorption Features in the Black Hole X-ray Binary H 1743-322
M. Shidatsu, C. Done
High inclination black hole X-ray binaries exhibit blueshifted ionized absorption lines from disk winds, whose launching mechanism is still in debate. The lines are predominantly o…
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.…