A 12.6-ms pulsar in Cygnus X-3

Details A 12.6-ms pulsar in Cygnus X-3 A 12.6-ms pulsar in Cygnus X-3

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.318..642c&link_type=abstract

Nature (ISSN 0028-0836), vol. 318, Dec. 26, 1985, p. 642-644. SERC-supported research.

Mathematics

Probability

82

Gamma Ray Astronomy, Pulsars, X Ray Binaries, Astronomical Models, Light Curve, Periodic Variations, Probability Theory

Scientific paper

The X-ray binary Cygnus X-3 has long been suspected of containing a fast, young pulsar, but previous observations at various wavelengths have failed to provide any evidence of a signal with a periodicity of less than 4.8 h (the well-known periodicity in the X-ray and infrared wavebands which is ascribed to orbital motion of a binary system). The authors report measurements of 1,000-GeV γ-rays which suggest a pulsar period of 12.5908±0.0003 ms, for data recorded in 1983 at the times of X-ray maximum in the 4.8-h cycle. The conservative probability of such a periodicity occurring by chance is 4×10-7 and, moreover, supportive evidence is provided by some earlier data.

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