Abstract
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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