Exploring the X-ray spectral variability of MCG-6-30-15 with XMM-Newton

Details Exploring the X-ray spectral variability of MCG-6-30-15 with XMM-Newton Exploring the X-ray spectral variability of MCG-6-30-15 with XMM-Newton

2007-01-19

arxiv.org/abs/astro-ph/0701567v1

Mon.Not.Roy.Astron.Soc.376:348-352,2007

Astronomy and Astrophysics

Astrophysics

6 pages, 7 figures, accepted by MNRAS

Scientific paper

10.1111/j.1365-2966.2007.11436.x

We present a study of the spectral variability of the Seyfert I galaxy MCG-6-30-15 based on the two long XMM-Newton observations from 2000 and 2001. The X-ray spectrum and variability properties of the 2001 data have previously been well described with a two-component model consisting of a variable power law and a much less variable reflection component, containing a broad relativistic iron line from the accretion disc around a rapidly rotating Kerr black hole. The lack of variability of the reflection component has been interpreted as an effect of strong gravitational light bending very close to the central black hole. Using an improved reflection model, we fit the two-component model to time-resolved spectra of both observations. Assuming that the photon index of the power law is constant we reconfirm the old result and show that this does not depend on the time-scale of the analysis.

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