The 4.8 hour variation of Cygnus X-3 at high X-ray energies

Details The 4.8 hour variation of Cygnus X-3 at high X-ray energies The 4.8 hour variation of Cygnus X-3 at high X-ray energies

Jan 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...203l..67p&link_type=abstract

Astrophysical Journal, vol. 203, Jan. 15, 1976, pt. 2, p. L67-L69. Research supported by the Deutsche Forschungsgemeinschaft.

Astronomy and Astrophysics

Astrophysics

11

Binary Stars, Periodic Variations, X Ray Sources, X Ray Spectra, X Ray Stars, Balloon Flight, Curve Fitting, Light Curve, Sine Waves, Spectral Energy Distribution

Scientific paper

During a balloon observation of Cygnus X-3, an intensity variation has been found which is in phase with the low-energy X-ray 4.8-hour sinusoidal light curve. The measured relative amplitude in the energy range from 32 to 64 keV is 0.37 (+0.31, -0.29). Compared with the results at lower energies, there is no indication for an energy dependence of the relative amplitude up to 64 keV. The encountered low-intensity source spectrum is compared with previous measurements.

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