The Resolved X-Ray Background in the Lockman Hole

Details The Resolved X-Ray Background in the Lockman Hole The Resolved X-Ray Background in the Lockman Hole

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004mas..conf..355w&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

Most of the soft, and a growing amount of the harder X-ray background (XRB) has been resolved into point sources but the resolved fraction above 7 keV has only been poorly probed. Using the 600 ks of XMM-Newton observations of the Lockman Hole, our aim has been to determine broad-band fluxes for all the detected objects. The goal has been to produce a robust result for the fraction of XRB flux that can be attributed to resolved sources, as a function of energy, particularly above ~ 7 keV. We found the resolved fraction to be 90% in the soft band but at harder energies the fraction was considerably lower - only ~ 50% in the 7.5-12 keV band. This would suggest there is an unresolved population of faint, hard sources.

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