Evidence of a 12 MS pulsar in Cygnus X-3

Details Evidence of a 12 MS pulsar in Cygnus X-3 Evidence of a 12 MS pulsar in Cygnus X-3

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.296..315b&link_type=abstract

In ESA, The 23rd ESLAB Symposium on Two Topics in X Ray Astronomy. Volume 1: X Ray Binaries p 315-319 (SEE N90-25711 19-89)

Astronomy and Astrophysics

Astronomy

1

Cygnus Constellation, Gamma Ray Astronomy, Pulsars, Data Processing, Emission Spectra, Ephemerides, Ephemeris Time, Gamma Ray Telescopes, Gamma Rays, Rayleigh Distribution, Stellar Spectra, Time Measurement

Scientific paper

Cygnus X-3 was observed in 1988 using the Durham University Mark 4 gamma ray telescope. Data shows further evidence for pulsed emission at a phase in the 4.8 hr cycle and with a pulsar period and secular period derivative. The conservative overall Rayleigh probability of uniformity of phase for this new result is 1.7 times 10 to the minus 6th power. A re-analysis of the data from observations of Cygnus X-3 from 1981 to 1985 using a new X-ray ephemeris of the 4.8 hr X-ray cycle suggests that from 1981 to 88 Cygnus X-3 is producing sporadic very high frequency gamma rays at a fixed time in the 4.8 hr X-ray cycle.

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