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An X-ray survey of clusters of galaxies. IV - A survey of southern clusters and a compilation of upper limits for both Abell and southern clustersThe results of the HEAO 1 A-1 X-ray survey of galaxy clusters are reported. X-ray error boxes and intensities are presented for all clusters in the Abell catalog and for the catalog of southern clusters and groups compiled by Duus and Newell (1977). A correlation is derived on the basis of the X-ray luminosity function for 2-6 keV which may be used to calculate the contribution of clusters to the diffuse X-ray background at different energies. The cluster X-ray is estimated to be 9.3 percent (+ 1.9 or - 1.5 percent). Correlations between X-ray luminosity and other cluster properties are exmained, and it is found that the distribution of upper limits may be applied to obtaining a more precise estimate of the average X-ray luminosity of clusters. The Abell richness class and southern cluster concentrations were strongly correlated with X-ray luminosity. Correlations between optical x-ray luminosity and optical radius velocity dispersion, spiral fraction, and radio power are analyzed. The evidence for all these correlations was considered to be weak because of poor scatter in the data.
Document ID
19850035581
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Kowalski, M. P.
(Hulburt (E. O.) Center for Space Research Washington, DC, United States)
Cruddace, R. G.
(Hulburt (E. O.) Center for Space Research Washington, DC, United States)
Wood, K. S.
(U.S. Navy, E. O. Hulburt Center for Space Research, Washington DC, United States)
Ulmer, M. P.
(U.S. Navy, E. O. Hulburt Center for Space Research, Washington, DC; Northwestern University Evanston, IL, United States)
Date Acquired
August 12, 2013
Publication Date
December 1, 1984
Publication Information
Publication: Astrophysical Journal Supplement Series
Volume: 56
ISSN: 0067-0049
Subject Category
Astrophysics
Accession Number
85A17732
Funding Number(s)
CONTRACT_GRANT: NAS8-33010
CONTRACT_GRANT: NAG8-367
CONTRACT_GRANT: NAG8-326
CONTRACT_GRANT: DPR-7023A
CONTRACT_GRANT: NAG8-368
Distribution Limits
Public
Copyright
Other

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