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Quasar X-Ray Spectra At z=1.5The predicted counts for ASCA observation was much higher than actually observed counts in the quasar. However, there are three weak hard x-ray sources in the GIS field. We are adding them to the source counts in modeling of hard x-ray background. The work is in progress. We have published a paper in Ap.J. on the luminosity function and the quasar evolution. Based on the theory described in this paper we are predicting a number of sources and their contribution to the x-ray background at different redshifts. These model predictions will be compared to the observed data in the final paper.
Document ID
20010019780
Document Type
Contractor or Grantee Report
Authors
Siemiginowska, Aneta (Smithsonian Astrophysical Observatory Cambridge, MA United States)
Date Acquired
August 20, 2013
Publication Date
January 1, 2001
Subject Category
Astronomy
Funding Number(s)
CONTRACT_GRANT: NAG5-3391
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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