52 citations · 157 across the 8 of their papers we have counts for
8 papers
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…
A Variable Partial Covering Model for the Seyfert 1 Galaxy MCG-6-30-15
Takehiro Miyakawa, Ken Ebisawa, Hajime Inoue
We propose a simple spectral model for the Seyfert 1 Galaxy MCG-6-30-15 that can explain most of the 1 - 40 keV spectral variation by change of the partial covering fraction, simil…
On the light-bending model of X-ray variability of MCG-6-30-15
P. T. Zycki, K. Ebisawa, A. Niedzwiecki +1
We apply the light bending model of X-ray variability to Suzaku data of the Seyfert 1 galaxy MCG-6-30-15. We analyze the energy dependence of the root mean square (rms) variability…
Spectral Variation of the Seyfert 1 Galaxy MCG-6-30-15 observed with Suzaku
Takehiro Miyakawa, Ken Ebisawa, Yuichi Terashima +3
We have investigated spectral variation of the Seyfert 1 galaxy MCG-6-30-15 observed with Suzaku in January 2006 for three separate periods spreading over fourteen days. We found t…
GR models of the X-ray spectral variability of MCG--6-30-15
A. Niedzwiecki, T. Miyakawa
We study in detail the GR models of the X-ray spectral variability for various geometries of the X-ray source and with various relativistic effects being the dominant cause of spec…
Luminosity dependence of the electron temperature in the bright hard state of the black hole candidate GX 339--4
Takehiro Miyakawa, Kazutaka Yamaoka, Jeroen Homan +4
We have analyzed 200 Rossi X-ray Timing Explorer observations of the black hole candidate GX 339--4, all from the bright hard state periods between 1996 and 2005. Purpose of our st…