Rosat reveals the large scale distribution of matter

Details Rosat reveals the large scale distribution of matter Rosat reveals the large scale distribution of matter

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..599..951s&link_type=abstract

X-RAY ASTRONOMY: Stellar Endpoints,AGN, and the Diffuse X-ray Background. Edited by Nicholas E. White, Giuseppe Malaguti, and G

Computer Science

Databases

X-Ray Sources, X-Ray Bursts, Background Radiations, Superclusters, Large-Scale Structure Of The Universe, Astronomical Catalogs, Atlases, Sky Surveys, Databases, Retrieval Systems, Archives, Etc., Galactic Nuclei, Circumnuclear Matter, And Bulges

Scientific paper

Fluctuations of the soft X-ray background (XRB) at angular scales of up to ~6° are measured using the ROSAT All-Sky Survey (RASS). At 1° the amplitude of the autocorrelation function (ACF) amounts to 0.0035+/-0.0007. In the range of 0°.3-4° the ACF slope γ=-1.1+/-0.2. These XRB variations are generated by the nonuniform spatial distribution of sources producing the XRB. The magnitude of the XRB fluctuations is used to estimate the level of clustering of X-ray sources. We show that the observed amplitude of the XRB fluctuations results from strong clustering of AGNs at redshifts where most of the XRB originates. .

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