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Abstract <p>We present the results of our analysis of the X-ray spectra for 101 active galactic nuclei (AGNs) from the catalog of sources detected by the Mikhail Pavlinsky ART-XC telescope onboard the SRG orbital observatory during the first five all-sky surveys (ARTSS1–5). This study has been performed to create a statistically complete AGN population database based on this catalog. The Swift/XRT archival data in the 1–10 keV energy band have been used. We have fitted the spectra by a power-law model with absorption and, for six sources, also considered a model with an additional component of the radiation reflected from a dusty torus. For all of the objects we have estimated the slope of the power-law continuum, the intrinsic absorption column density, and the absorption-corrected X-ray flux for the first time. Most of the investigated AGNs are characterized by weak intrinsic absorption; the absorption column density is <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(N_{\textrm{H}}&gt;10^{22}\)</EquationSource> <!--Letters2570055Sokolov-m1--> </InlineEquation> cm<InlineEquation ID="IEq2"> <EquationSource Format="TEX">\({}^{-2}\)</EquationSource> <!--Letters2570055Sokolov-m2--> </InlineEquation> only in 15 objects.</p>

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Characteristics of the X-ray Spectra for Active Galactic Nuclei from the SRG/ART-XC All-Sky Survey Based on Swift/XRT Archival Data

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • A. D. Sokolov,
  • S. Yu. Sazonov,
  • G. S. Uskov

摘要

Abstract

We present the results of our analysis of the X-ray spectra for 101 active galactic nuclei (AGNs) from the catalog of sources detected by the Mikhail Pavlinsky ART-XC telescope onboard the SRG orbital observatory during the first five all-sky surveys (ARTSS1–5). This study has been performed to create a statistically complete AGN population database based on this catalog. The Swift/XRT archival data in the 1–10 keV energy band have been used. We have fitted the spectra by a power-law model with absorption and, for six sources, also considered a model with an additional component of the radiation reflected from a dusty torus. For all of the objects we have estimated the slope of the power-law continuum, the intrinsic absorption column density, and the absorption-corrected X-ray flux for the first time. Most of the investigated AGNs are characterized by weak intrinsic absorption; the absorption column density is \(N_{\textrm{H}}>10^{22}\) cm \({}^{-2}\) only in 15 objects.