Takehiro Miyakawa

Spectral Variation of the Seyfert 1 Galaxy MCG-6-30-15 observed with Suzaku (2009)

Miyakawa, Takehiro, Ebisawa, Ken, Terashima, Yuichi, Tsuchihashi, Fuminori, Inoue, Hajime, Zycki, Piotr

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 that the...

Luminosity dependence of the electron temperature in the bright hard state of the black hole candidate GX 339--4 (2008)

Miyakawa, Takehiro, Yamaoka, Kazutaka, Homan, Jeroen, Saito, Koji, Dotani, Tadayasu, Yoshida, Atsumasa, ...

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 study is to...