Spatial fluctuations in the diffuse X ray background

Details Spatial fluctuations in the diffuse X ray background Spatial fluctuations in the diffuse X ray background

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.296..727w&link_type=abstract

In ESA, The 23rd ESLAB Symposium on Two Topics in X Ray Astronomy. Volume 2: AGN and the X Ray Background p 727-731 (SEE N90-258

Astronomy and Astrophysics

Astronomy

19

Background Radiation, Spatial Dependencies, Variations, X Ray Sources, Galactic Radiation, Heao 2, Spatial Resolution, Spectrum Analysis

Scientific paper

Recent measurements of spatial fluctuations in the diffuse X-ray background are shown to constrain the extragalactic log N-log S relation in the 2 to 10 keV energy band to a form close to the Euclidean prediction over the flux range 10-10 to 5 x 10-13 erg/sq cm/s. The normalization of the 2 to 10 keV source counts is a factor approximately 3 above that derived from the Einstein medium sensitivity survey if a spectral conversion is assumed which ignores absorption effects. Both this result and the spectral characteristics of the spatial fluctuations suggest that low luminosity active galaxies dominate the 2 to 10 keV source counts at intermediate flux levels.

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