The foreground component of the X-ray background (XRB) can be studied by cross-correlating its intensity with galaxy catalogs. The authors computed the two-point cross-correlation function Wxg between 67 Einstein X-ray fields and the APM galaxy catalog. They detected a signal with an amplitude of Wxg = 0.04±0.01, significant at the 3.5σ level. The reality of this signal was tested with a series of control data sets. The authors discuss how this signal can be used to constrain models of the XRB.
Roentgenstrahlung from the Universe
- Pub Date:
- February 1996
- X-Ray Background;
- To appear in Proc. of "Roentgenstrahlung from the Universe" held in Wuerzburg, Germany, in Sept. 1995. 2 pages, 2 figures included, uuencoded compressed Postscript