Survey of intensity variability of strong galactic X-ray sources from UHURU

Details Survey of intensity variability of strong galactic X-ray sources from UHURU Survey of intensity variability of strong galactic X-ray sources from UHURU

Sep 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...208..849f&link_type=abstract

Astrophysical Journal, vol. 208, Sept. 15, 1976, pt. 1, p. 849-862.

Astronomy and Astrophysics

Astronomy

46

Binary Stars, Radiant Flux Density, Uhuru Satellite, X Ray Astronomy, Galactic Radiation, Milky Way Galaxy, Spaceborne Astronomy, Stellar Radiation, X Ray Sources, X Ray Stars

Scientific paper

X-ray observations made with the Uhuru satellite have been used to study the characteristics of the intensity of 19 strong galactic sources. On a time scale of 0.1-1.0 s, all but two these sources showed variability at a significance level greater than 3 sigmas. On longer time scales - minutes to hours - all but three sources showed variations above the 3-sigma level. In addition to characterizing in a systematic way the broad range of variability of the galactic X-ray sources, the results are applied to specific models of Cygnus X-1 and Cygnus X-3. Comments are also made on the similar nature of the strong galactic-center X-ray sources and the globular-cluster sources.

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