Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...379..507m&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 379, Oct. 1, 1991, p. 507-516. Research supported by Ministero dell'Univers
Astronomy and Astrophysics
Astronomy
13
Background Radiation, Heao 1, Quasars, Sky Surveys (Astronomy), X Ray Sources, Active Galactic Nuclei, Galactic Clusters
Scientific paper
HEAO 1 A-2 all-sky survey data have been used to determine the amplitude of intensity fluctuations of the extragalactic 2-10 keV X-ray background (XRB) over an effective solid angle of 1.84 sq deg and their angular correlation function on angular scales of less than 3 deg. A good empirical fit to the data is obtained assuming that the integral counts in the A-2 band have a slope of 1.65 + 0.06 or - 0.07. Alternatively, the data may imply a significant clustering of extragalactic X-ray sources.
Boldt Elihu A.
Danese Lugi
de Zotti Gainfranco
Franceschini Alberto
Marshall Francis E.
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