Spatial Fluctuations in the Diffuse X-Ray Background
Abstract
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.
- Publication:
-
Two Topics in X-Ray Astronomy, Volume 1: X Ray Binaries. Volume 2: AGN and the X Ray Background
- Pub Date:
- November 1989
- Bibcode:
- 1989ESASP.296..727W
- Keywords:
-
- Background Radiation;
- Spatial Dependencies;
- Variations;
- X Ray Sources;
- Galactic Radiation;
- Heao 2;
- Spatial Resolution;
- Spectrum Analysis;
- Space Radiation