The X-ray log N-log S relationResults from various surveys are reviewed as regards X-ray source counts at high galactic latitudes and the luminosity functions determined for extragalactic sources. Constraints on the associated log N-log S relation provided by the extragalactic X-ray background are emphasized in terms of its spatial fluctuations and spectrum as well as absolute flux level. The large number of sources required for this background suggests that there is not a sharp boundary in the redshift distribution of visible matter.
Document ID
19890064051
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Boldt, Elihu (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Subject Category
Space Radiation
Meeting Information
Meeting: Large Scale Structure and Motions in the Universe