Bulletin of Taras Shevchenko National University of Kyiv. Astronomy, no. 52, p. 32-35 (2015)
X-ray properties of distant radio-loud quasars from the XMM-Newton and Swift/XRT data
E. Fedorova, Ph. D.
Taras Shevchenko National University of Kyiv, Kyiv
Abstract
The X-ray data of XMM-Newton and Swift/XRT observations of the sample of radio-loud quasars with the redshifts z>1 from thecross-correlation of PKS radio catalog and Veron-Veron AGN catalog are processed and analyzed. The model the reflected andabsorbed power-law spectrum with an exponential cut-off at high energies was applied to fit the main part of the spectra of thesequasars in the energy range 0.3–10 кеВ, except only gravitational lens system PKS1830-211 to which the broken power-law wasused. The mean values of the parameters over the set are: photon index Г = 1.59±0.04, high-energy cut-off EC = 77 keV, reflectionparameter R=3.2 and column density of the absorbing material NH = 4.2*1021 cm-2. All the objects of the set, except PKS2000-330,demonstrate the exponential cut-off below 100 keV in the spectrum, as it is prescribed to the RL AGNs within the spin-paradigm.
Keywords
AGN, quasars, X-ray observations
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