Spectral variability of Cygnus X-3

Details Spectral variability of Cygnus X-3 Spectral variability of Cygnus X-3

Oct 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...201l...9s&link_type=abstract

Astrophysical Journal, vol. 201, Oct. 1, 1975, pt. 2, p. L9-L13.

Astronomy and Astrophysics

Astrophysics

65

Interstellar Matter, Stellar Spectra, X Ray Spectroscopy, Absorption Spectra, Binary Stars, Black Body Radiation, Line Spectra, Radiation Sources, Satellite Observation, Spectral Emission, Spectrum Analysis, Stellar Luminosity

Scientific paper

Spectra of Cyg X-3 from 1.7 to 40 keV, obtained about a year apart using the same rocket payload, show large spectral differences. The two observations suggest that while the luminosity of this source remains roughly the same, its spectrum can vary from a featureless blackbody distribution to a flat spectrum which includes strong iron line emission at approximately 6.7 keV. The flux in the line is 0.018 (plus or minus 0.004) photons per sq cm/sec, corresponding to an equivalent continuum width of 1.2 keV.

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