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dc.contributor.authorMemola, E.-
dc.contributor.authorCaccianiga, A.-
dc.contributor.authorCocchia, F.-
dc.contributor.authorDella Ceca R-
dc.contributor.authorMaccacaro, T.-
dc.contributor.authorSevergnini, P.-
dc.contributor.authorFyfe, D. J.-
dc.contributor.authorMateos, S.-
dc.contributor.authorWatson, M. G.-
dc.contributor.authorLamer, G.-
dc.identifier.citationAstronomy & Astrophysics, 2007, 465 (3), pp. 759-764-
dc.description.abstractAims.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.-
dc.publisherEDP Sciences for European Southern Observatory (ESO)-
dc.rightsCopyright © 2007 ESO. Reproduced with permission from Astronomy & Astrophysics, © ESO.-
dc.titleSearching for absorbed AGN in the 2XMM-Newton pre-release EPIC Serendipitous Source Catalogue-
dc.typeJournal Article-
dc.description.versionPublisher Version-
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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