Bulletin of Taras Shevchenko National University of Kyiv. Astronomy, no. 51, p. 10-15 (2014)

The X-ray spectral parameters for a sample of 65 active nuclei galaxies of BAT AGNs

A. Vasylenko, postgrad. stud.,
V. Zhdanov, Dr. Phys. and Math. Sciences,
E. Fedorova, Ph.D. in Phys. and Math. Sciences
Taras Shevchenko National University of Kyiv

We present 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 simultaneously, thus allowing us to extend the spectral range 0,5-300 keV. The spectralparameters, such as power-law indexes, relativity reflection R, equivalent width of Fe K line, neutral absorption and intrinsic luminosity aredetermined for this sample. We built and examine such dependences as “power-law index – relativity reflection”; “equivalent width of Fe Kα line –intrinsic luminosity” (Baldwin effect) in middle 2-10 keV and hard 20-100 keV energy ranges; “power-law index – cut-off energy” and “absorptionvalue-equivalent width of Fe Kα line”. Dependence of “power-law index – relativity reflection” for Seyfert 1/2 galaxies were investigated separately.We found that this dependence is not clearly approximated by linear model. Also, we found that the relativity reflection parameter at low power-lawindexes for Seyfert 2 galaxies systematically higher than in Seyfert 1. This can be explained by increasing contribution of reflected radiation fromthe gas-dust torus.

Galaxy, spectral parameters

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