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Variations of the X-ray INTEGRAL spectrum of the active galactic nucleus of NGC 4945

Fedorova, E. V.; Zhdanov, V. I.

Results of 11-year-long X-ray INTEGRAL observations of the nucleus of Seyfert galaxy NGC 4945 in the 3–500 keV range were processed. A two-component spectrum model, which includes strong radiation absorption in the Compton-thick torus around the AGN "central engine" and secondary radiation reflected from the torus walls, was used in the analysis. …