X-ray observations of the 1980 Cygnus X-1 'high state'

Details X-ray observations of the 1980 Cygnus X-1 'high state' X-ray observations of the 1980 Cygnus X-1 'high state'

Feb 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982natur.295..675o&link_type=abstract

Nature, vol. 295, Feb. 25, 1982, p. 675, 676. Research supported by Zonta International;

Astronomy and Astrophysics

Astronomy

38

Black Holes (Astronomy), Light Curve, Radiant Flux Density, X Ray Sources, Radiation Detectors, Spectral Correlation, X Ray Spectra

Scientific paper

Observations of intensity transitions in the X-ray emission from the black-hole candidate Cygnus X-1 were made by the Hakucho satellite during the summer of 1980 and are reported here. In addition, the results of hard (20-120 keV) X-ray observations of Cyg X-1 are reported. These data were obtained during the 'high' intensity state by balloon-borne mercuric iodide detectors, and are compared with data obtained at similar energies approximately 1 month earlier (A. Sheepmaker et al., in preparation) during the 'low' intensity state.

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