The Black Hole Spin and Soft X-ray Excess of the Luminous Seyfert Galaxy Fairall 9. (arXiv:1209.0468v1 [astro-ph.HE])

The Black Hole Spin and Soft X-ray Excess of the Luminous Seyfert Galaxy Fairall 9. (arXiv:1209.0468v1 [astro-ph.HE]):
We present an analysis of all XMM-Newton and Suzaku X-ray spectra of the
nearby luminous Seyfert galaxy Fairall 9. Confirming previous analyses, we find
robust evidence for a broad iron line associated with X-ray reflection from the
innermost accretion disk. By fitting a spectral model that includes a
relativistically ionized reflection component, we examine the constraints on
the inclination of the inner accretion disk and the black hole spin, and the
complications introduced by the presence of a photoionized emission line
system. Employing multi-epoch fitting, we attempt to obtain robust and
concordant measures of the accretion disk parameters. We also clearly see a
soft X-ray excess in Fairall 9. During certain epochs, the soft excess can be
described with same disk reflection component that produces the iron line.
However, there are epochs where an additional soft component is required. This
can be attributed to either an additional highly-ionized, strongly blurred disk
reflection component, or a new X-ray continuum component.