Bulletin of Taras Shevchenko National University of Kyiv. Astronomy, no. 52, p. 39-43 (2015)

Correlation of the X-ray spectral parameters for a sample of active galactic nuclei using the data of Swift/BAT AGNs catalog

A. Vasylenko, postgrad. stud.,
E. Fedorova, Ph.D.,
V. Zhdanov, Dr. Sci., Prof.,
Taras Shevchenko National University of Kyiv, Kyiv

We treated a homogeneous sample of 65 active galactic nuclei, which are part of the Swift/BAT AGN catalogue. For this sample we analyzed Xray spectra from XMM-Newton and INTEGRAL satellites thus allowing us to extend the spectral range to 0,5-300 keV. The spectral parameters, suchas the photon index Г, relative reflection R, equivalent width of Fe K line, neutral absorption and intrinsic luminosity I are determined for objects of this sample. We determined correlations Г-R, EWFeK-I, Г-Ec, EWFeK-NH. Dependence of “power-law index – relative reflection” for Seyfert ½ galaxies were investigated separately. We found that this dependence is not clearly approximated by linear model. Also, we found that the relative reflection parameter at low power-law indexes for Seyfert 2 galaxies systematically higher than in Seyfert 1. This can be explained by increasingcontribution of reflected radiation from the gas-dust torus.

Active galactic nucleus

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