SIMBAD references

2007A&A...465..759M - Astronomy and Astrophysics, volume 465, 759-764 (2007/4-3)

Searching for absorbed AGN in the 2XMM-Newton pre-release EPIC Serendipitous Source Catalogue.

MEMOLA E., CACCIANIGA A., COCCHIA F., DELLA CECA R., MACCACARO T., SEVERGNINI P., FYFE D.J., MATEOS S., WATSON M.G. and LAMER G.

Abstract (from CDS):

We aim to test a method of efficiently selecting X-ray obscured AGN in the 2XMM-Newton EPIC Serendipitous Source Catalogue. By means of a strong correlation established using the XMM-Newton Hard Bright Sample between the intrinsic absorption and the hardness ratio to the 0.5-2.0keV and 2.0-4.5keV 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. X-ray and optical spectral analysis were performed for three objects. Strong absorption (NH>1022cm–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.

Abstract Copyright:

Journal keyword(s): surveys - methods: data analysis - X-rays: galaxies - galaxies: active

Nomenclature: Tables 1, 2: 2XMMp JHHMMSS.s+DDMMSS N=3.

Simbad objects: 3

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