Discovering Compton-thick AGN over the Widest XMM-Newton Field

Details Discovering Compton-thick AGN over the Widest XMM-Newton Field Discovering Compton-thick AGN over the Widest XMM-Newton Field

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sptz.prop50818a&link_type=abstract

Spitzer Proposal ID #50818

Computer Science

Scientific paper

Deep X-ray surveys have identified large numbers of AGNs in a relatively obscuration-independent manner. However, there is considerable evidence that >50% of luminous AGNs remain undetected, most of which will be heavily obscured by Compton-thick material. We have used the widest XMM-Newton survey (the Serendipity Survey) to select AGNs in the SDSS that have luminous [OIII] emission but are X-ray undetected down to faint limits, implying ~two orders of magniude of extinction (i.e., likely to be Compton thick). Here we propose for Spitzer-IRS low-resolution spectroscopy and MIPS~24um and 70um observations of 15 objects to measure the dust-reradiated emission from AGN and star-formation components, to confirm if they are Compton-thick AGNs. The sample probes regions of the z-L_AGN plane (z~0.1-0.2; L_X, abs~3x10^41-3x10^43 erg/s) that are not well sampled by deeper narrow-field X-ray surveys.

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