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Narrow Fe-K Reverberation Mapping Unveils the Deactivated Broad-Line Region in a Changing-Look Active Galactic Nucleus
Hirofumi Noda, Taisei Mineta, Takeo Minezaki +11
"Changing-look active galactic nuclei" (CLAGNs) are known to change their apparent types between types 1 and 2, usually accompanied by a drastic change in their luminosity on times…
Origin of the Characteristic X-ray Spectral Variations of IRAS 132243809
Hiroki Yamasaki, Misaki Mizumoto, Ken Ebisawa +1
The Narrow-line Seyfert 1 galaxy (NLS1) IRAS 132243809 is known to exhibit significant X-ray spectral variation, a sharp spectral drop at 7 keV, strong soft excess emissi…
Origin of the Broad Iron Line Feature and the Soft X-ray Variation in Seyfert Galaxies
Naoki Iso, Ken Ebisawa, Hiroaki Sameshima +4
Many Seyfert galaxies are known to exhibit significant X-ray spectral variations and seemingly broad iron K-emission line features. In this paper, we show that the "variable partia…
Observations of Gamma-ray Bursts with ASTRO-H and Fermi
M. Ohno, T. Kawano, M. S. Tashiro +9
ASTRO-H, the sixth Japanese X-ray observatory, which is scheduled to be launched by the end of Japanese fiscal year 2015 has a capability to observe the prompt emission from Gamma-…
Interpretation of the X-ray Spectral Variation of 1H0707-495 with a Variable Double Partial Covering Model
Misaki Mizumoto, Ken Ebisawa, Hiroaki Sameshima
The Narrow-line Seyfert 1 galaxy 1H0707-495 is known to exhibit significant X-ray spectral variations. Its X-ray energy spectrum is characterized by a strong soft excess emission,…