X-ray spectral parameters for a sample of 95 active galactic nuclei

Abstract

We present a broadband X-ray analysis of a new homogeneous sample of 95 active galactic nuclei (AGN) from the 22-month Swift/BAT all-sky survey. For this sample we treated jointly the X-ray spectra observed by XMM-Newton and INTEGRAL missions for the total spectral range of 0.5–250 keV. Photon index Γ, relative reflection R, equivalent width of Fe Kα line EWFeK, hydrogen column density NH, exponential cut-off energy Ec and intrinsic luminosity Lcorr are determined for all objects of the sample. We investigated correlations Γ–R, EWFeK–Lcorr, Γ–Ec, EWFeK–NH. Dependence "Γ–R" for Seyfert 1/2 galaxies has been investigated separately. We found that the relative reflection parameter at low power-law indexes for Seyfert 2 galaxies is systematically higher than for Seyfert 1 ones. This can be related to an increasing contribution of the reflected radiation from the gas-dust torus. Our data show that there exists some anticorrelation between EWFeK and Lcorr, but it is not strong. We have not found statistically significant deviations from the AGN Unified Model.