AbstractShort-term variability of X-ray spectra has been reported for several Active Galactic Nuclei. Significant X-ray flux variations are observed within time scales down to 104–105s. We discuss short variability time scales in the framework of the X-ray flare model, which assumes the release of a large hard X-ray flux above a small portion of the accretion disk. The resulting observed X-ray spectrum is composed of the primary radiation as well as a reprocessed/Compton reflection component that we model performing numerical radiative transfer simulations. We conduct Monte-Carlo simulations of large flare distributions across the disk including relativistic corrections of the observed radiation and discuss general implications on AGN spectra and their variability.


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    Title :

    X-ray variability of active galactic nuclei and the flare model


    Contributors:
    Goosmann, R.W. (author) / Czerny, B. (author) / Dumont, A.-M. (author) / Mouchet, M. (author) / Różańska, A. (author) / Karas, V. (author) / Dovčiak, M. (author)

    Published in:

    Advances in Space Research ; 38 , 7 ; 1398-1402


    Publication date :

    2005-04-06


    Size :

    5 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English






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