Image Details
 
                    Caption: Fig. 6.
Top: 20–100 keV flux distribution of AGNs contributing to the CXB at 30 keV for different bins of redshift (see labels in the bottom panel). Bottom: Fraction of the CXB contributed by sources brighter than the value in abscissa, for the different redshift shells.
© 2004. The American Astronomical Society. All rights reserved. Printed in U.S.A.