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X-ray emission properties of BLAGN in the XMM-2dF Wide Angle Survey

Published online by Cambridge University Press:  01 August 2006

S. Mateos ,
M. G. Watson ,
J. A. Tedds ,
F. J. Carrera ,
M. Page  and
A. Corral
S. Mateos
Affiliation:
Department of Physics and Astronomy, University of Leicester, LE1 7RH, UK email: [email protected]
M. G. Watson
Affiliation:
Department of Physics and Astronomy, University of Leicester, LE1 7RH, UK email: [email protected]
J. A. Tedds
Affiliation:
Department of Physics and Astronomy, University of Leicester, LE1 7RH, UK email: [email protected]
F. J. Carrera
Affiliation:
Instituto de Física de Cantabria (CSIC-UC), Avenida de los Castros, 39005 Santander, Spain
M. Page
Affiliation:
Mullard Space Science Laboratory, UCL, Holmbury St. Mary, Surrey, RH5 6NT, UK
A. Corral
Affiliation:
Instituto de Física de Cantabria (CSIC-UC), Avenida de los Castros, 39005 Santander, Spain
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Abstract

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We present the preliminary results of the X-ray spectral analysis of one of the largest samples of X-ray selected BLAGN assembled so far from the XMM-2dF Wide Angle Survey. The sample, with 641 spectroscopically identified BLAGN, provides a unique resource to carry out a statistical analysis of the emission properties of these objects over a broad range of X-ray luminosities and redshifts. The X-ray spectra of the majority of the objects were best fitted with a power law with a near constant mean spectral photon index. No obvious trend of this spectral parameter with X-ray luminosity or redshift was found.

We measured the mean photon index of our objects to be ∼1.96 ± 0.05 with an intrinsic dispersion σ=0.22±0.03. X-ray absorption was detected in ∼8% of the sources, with no preferred luminosity or redshift and having typical values of the absorbing column density ≤1022 cm−2.

Keywords

X-rays: general – X-ray surveys – galaxies: active
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S238: Black Holes from Stars to Galaxies – Across the Range of Masses , August 2006 , pp. 59 - 64
Copyright
Copyright © International Astronomical Union 2007

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