Short-term time variability of Cygnus X-1

Details Short-term time variability of Cygnus X-1 Short-term time variability of Cygnus X-1

Aug 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...199l.147w&link_type=abstract

Astrophysical Journal, vol. 199, Aug. 1, 1975, pt. 2, p. L147-L151.

Astronomy and Astrophysics

Astronomy

56

Binary Stars, Stellar Radiation, Variable Stars, X Ray Astronomy, X Ray Stars, Autocorrelation, Cross Correlation, Shot Noise, Spaceborne Astronomy, Uhuru Satellite

Scientific paper

Autocorrelation functions, power-density spectra, and cross-correlation functions were calculated for 71 observations of Cyg X-1 by the Uhuru satellite. The average autocorrelation function and power-density spectrum were found to be independent of energy and consistent with a shot-noise source with a characteristic time constant of 0.45 s. The data in different energy bands were found to be 100 percent correlated.

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