Anti-correlated hard and soft X-ray intensity variations of the black-hole candidates CYG X-1 and A0620-00

Details Anti-correlated hard and soft X-ray intensity variations of the black-hole candidates CYG X-1 and A0620-00 Anti-correlated hard and soft X-ray intensity variations of the black-hole candidates CYG X-1 and A0620-00

Feb 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976natur.259..544c&link_type=abstract

Nature, vol. 259, Feb. 19, 1976, p. 544, 545.

Astronomy and Astrophysics

Astronomy

49

Black Holes (Astronomy), Radiant Flux Density, Spectral Energy Distribution, X Ray Sources, X Ray Spectra, Ariel Satellites, Astronomical Models, Compton Effect, Spectrum Analysis, X Ray Astronomy

Scientific paper

A basic similarity in the unusual spectral time variations of Cyg X-1 and A0620-00 is pointed out which indicates that the two sources may have a common X-ray emission mechanism. Data obtained by the satellite Ariel V at a few thousand electron volts are presented which demonstrate that both sources switch between two states, a normal low-intensity state and an enhanced high-intensity state. It is suggested that inverse Compton scattering is a plausible common emission mechanism.

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