Isolating the Foreground of the X-Ray Background
Refregier, A. · Helfand, D. J. · McMahon, R. G.
Original · EN
The foreground component of the X-ray Background (XRB) can be studied by cross-correlating its intensity with galaxy catalogs. We computed the two-point cross-correlation function Wxg between 67 Einstein X-ray fields and the APM galaxy catalog. We detected a signal with an amplitude of Wxg =.04 ±.01, significant at the 3.5σ level. The reality of this signal was tested with a series of control data sets. We discuss how this signal can be used to constrain models of the XRB.
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