High-energy X-ray spectra of Cygnus XR-1 observed from OSO 8

Details High-energy X-ray spectra of Cygnus XR-1 observed from OSO 8 High-energy X-ray spectra of Cygnus XR-1 observed from OSO 8

Jun 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...230..551d&link_type=abstract

Astrophysical Journal, Part 1, vol. 230, June 1, 1979, p. 551-557.

Astronomy and Astrophysics

Astronomy

30

Astronomical Spectroscopy, Binary Stars, Cygnus Constellation, Oso-8, X Ray Sources, X Ray Spectra, High Energy Interactions, Spaceborne Astronomy, Stellar Mass Accretion

Scientific paper

X-ray spectra of Cygnus XR-1 were measured with the scintillation spectrometer aboard the OSO 8 satellite during a period of one-and-one-half to three weeks in each of the years from 1975 to 1977. Typical spectra of the source between 15 and 250 keV are presented and the spectra are found to be well represented by a single power-law expression whose photon number spectral index is different for the two intensity states that were considered. The observed pivoting effect is consistent with two-temperature accretion disk models of the X-ray emitting region.

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