Evidence for short term changes in the intensity and spectrum of hard X-rays from CYG X-1

Details Evidence for short term changes in the intensity and spectrum of hard X-rays from CYG X-1 Evidence for short term changes in the intensity and spectrum of hard X-rays from CYG X-1

Dec 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ap%26ss..45..433j&link_type=abstract

Astrophysics and Space Science, vol. 45, Dec. 1976, p. 433-438. Research supported by the Department of Space.

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Energy Spectra, High Energy Interactions, Luminous Intensity, X Ray Sources, X Ray Spectra, Balloon Sounding, Binary Stars, Emission Spectra, Stellar Luminosity, X Ray Stars

Scientific paper

The paper presents experimental evidence for the existence of fast intensity fluctuations with time scales of the order of a minute in the X-ray emission from Cyg X-1 at energies greater than 29 keY. Spectral variations over time intervals of 20-25 mm are also observed in the same energy range. Whereas, similar intensity and spectral fluctuations have been reported earlier at lower energies the observations presented here is the first evidence for the existence of similar fluctuations at high energies

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