New measurements of the 12.6 millisecond pulsar in Cygnus X-3

Details New measurements of the 12.6 millisecond pulsar in Cygnus X-3 New measurements of the 12.6 millisecond pulsar in Cygnus X-3

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...350..745b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 350, Feb. 20, 1990, p. 745-753. Research supported by SERC.

Astronomy and Astrophysics

Astronomy

27

Gamma Ray Astronomy, Pulsars, X Ray Binaries, Cygnus Constellation, Ephemerides, Gamma Ray Spectra, Periodic Variations, Time Series Analysis

Scientific paper

Evidence for a 12.59 ms pulsar in Cygnus X-3 is presented on the basis of TeV gamma-ray observations. Evidence for pulsed emission at a phase in the 4.8 hr cycle and with a pulsar period and secular period derivative are compatible with earlier measurements (Chadwick et al., 1985). The conservative overall Rayleigh probability of uniformity of phase for this new result is 1.7 x 10 to the -6th. Data from observations of Cygnus X-3 from 1981 to 1985 are analyzed using a new X-ray ephemeris of the 4.8 hr X-ray cycle. This suggests that Cygnus X-3 is producing sporadic very high energy gamma rays at a fixed time in the 4.8 hr X-ray cycle.

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