Resolving the X-ray Spectral Paradox: XMM-Newton Spectra of Faint Sources in the Lockman Hole
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Using 100ks of XMM-Newton data on the Lockman Hole, we show how the X-ray background 'spectral paradox' is being resolved. We find the summed spectra of the Type I AGN, Type II AGN, and the unidentified objects. We conclude that the hard slope of the XRB is caused predominantly by latter sources, i.e. the Type II AGN and unidentified objects.
2 pages, 1 figure, to appear in the proceedings of the conference "New Century of X-ray Astronomy" held in Yokohama, Japan, March 2001
2 pages, 1 figure, to appear in the proceedings of the conference "New Century of X-ray Astronomy" held in Yokohama, Japan, March 2001