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Title: Searching for absorbed AGN in the 2XMM-Newton pre-release EPIC Serendipitous Source Catalogue
Authors: Memola, E.
Caccianiga, A.
Cocchia, F.
Della Ceca R
Maccacaro, T.
Severgnini, P.
Fyfe, D. J.
Mateos, S.
Watson, M. G.
Lamer, G.
First Published: Apr-2007
Publisher: EDP Sciences for European Southern Observatory (ESO)
Citation: Astronomy & Astrophysics, 2007, 465 (3), pp. 759-764
Abstract: Aims.We aim to test a method of efficiently selecting X-ray obscured AGN in the 2XMM-Newton EPIC Serendipitous Source Catalogue. Methods.By means of a strong correlation established using the XMM-Newton Hard Bright Sample between the intrinsic absorption and the hardness ratio to the 0.5-2.0 keV and 2.0-4.5 keV bands, an efficient way of selecting absorbed sources has been worked out. A hardness ratio selection based on the 2XMM-Newton pre-release Source Catalogue led us to the definition of candidates likely to be obscured in X-rays. Results.X-ray and optical spectral analysis were performed for three objects. Strong absorption ($N_{\rm H} > 10^{22}$ cm-2) was detected from the X-ray analysis, confirming the efficiency of the method used to select obscured sources. The presence of absorption is also revealed in the optical band, although at a significantly lower level than inferred from the X-ray band.
DOI Link: 10.1051/0004-6361:20066571
ISSN: 0004-6361
eISSN: 1432-0746
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2007 ESO. Reproduced with permission from Astronomy & Astrophysics, © ESO.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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