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Survey of Bare Active Galactic Nuclei in the local universe (z < 0.2): I. On the origin of Soft-Excess
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Survey of Bare Active Galactic Nuclei in the local universe (z < 0.2): I. On the origin of Soft-Excess

Prantik Nandi, Arka Chatterjee, Arghajit Jana, Sandip K Chakrabarti, Sachindra Naik, Samar Safi-Harb, Hsiang-Kuang Chang and Jeremy Heyl
16/08/2023

Abstract

Physics - Astrophysics of Galaxies Physics - High Energy Astrophysical Phenomena
We analyse a sample of 21 `bare' Seyfert~1 Active Galactic Nuclei (AGNs), a sub-class of Seyfert~1s, with intrinsic absorption$\mathrm{N_{H}} \sim 10^{20}~ \mathrm{cm}^{-2}$ , in the local universe (z$<$0.2) using ıt XMM-Newton and ıt Swift/XRT observations. The luminosities of the primary continuum, the X-ray emission in the 3 to 10 keV energy range and the soft-excess, the excess emission that appears above the low-energy extrapolation of the power-law fit of 3 to 10 keV X-ray spectra, are calculated. Our spectral analysis reveals that the long-term intrinsic luminosities of the soft-excess and the primary continuum are tightly correlated$(L_{PC}\propto L_{SE}^{1.1\pm0.04})$ . We also found that the luminosities are correlated for each source. This result suggests that both the primary continuum and soft excess emissions exhibit a dependency on the accretion rate in a similar way.

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