A change in light curve asymmetry and the ephemeris of Cygnus X-3

Details A change in light curve asymmetry and the ephemeris of Cygnus X-3 A change in light curve asymmetry and the ephemeris of Cygnus X-3

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....95l...5v&link_type=abstract

Astronomy and Astrophysics, vol. 95, no. 1, Feb. 1981, p. L5-L7. Research supported by the Netherlands Foundation for Astronomi

Astronomy and Astrophysics

Astronomy

78

Ephemerides, Light Curve, Stellar Radiation, X Ray Sources, Binary Stars, Cos-B Satellite, Spaceborne Astronomy

Scientific paper

Cygnus X-3 was observed in the 2-12 keV range for 40 days in May-June 1980. The mean 4.8 h light curve was seen to change significantly in a way suggestive of the existence of an underlying binary with an eclipse duration of 40 percent of the period. The observed time of X-ray minimum was found to increase the level of confidence of a period derivative when compared to the earlier measurements.

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