1995/12/07 by A. Refregier, D. J. Helfand, Refregier, A. +3
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9512042
To appear in Proc. of "Roentgenstrahlung from the Universe" held in Wuerzburg, Germany, in Sept. 1995. 2 pages, 2 figures included, uuencoded compressed Postscript
arxiv created 1995/12/07 · arxiv updated 2009/12/01
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 \em 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.