Obscured AGN and Type II QSOS in Chandra Cluster Fields

Details Obscured AGN and Type II QSOS in Chandra Cluster Fields Obscured AGN and Type II QSOS in Chandra Cluster Fields

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004mas..conf..231g&link_type=abstract

MULTIWAVELENGTH AGN SURVEYS. Proceedings of the Guillermo Haro Conference 2003. Held 8-12 December 2003 in Cozumel, Mexico. Edit

Astronomy and Astrophysics

Astronomy

Scientific paper

We present results on the first, wide-area study to concentrate on the properties of distant, powerful, X-ray selected, obscured AGN discovered serendipitously in 10-70 ks Chandra observations, We are able to study in detail three luminous type 2 quasars with LX-ray > 1044 erg s-1 & obscuring column density > 1023 cm-2 and identify more good examples of such sources, enabling us to derive a lower limit to the space density of QSO2s to be ~10 deg-2. The possibility of the existence of completely obscured AGN (4π covering fraction with little or no scattered light into the line-of-sight) is discussed through the example of a high resolution VLT spectrum of one such Seyfert 2 identified in our sample.

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