The binary X-ray pulsar 3U 1223-62

Details The binary X-ray pulsar 3U 1223-62 The binary X-ray pulsar 3U 1223-62

Sep 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978mnras.184p..67w&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 184, Sept. 1978, p. 67P-72P.

Astronomy and Astrophysics

Astronomy

25

Binary Stars, Pulsars, X Ray Sources, Ariel 5 Satellite, Periodic Variations, Proportional Counters

Scientific paper

A 200-day Ariel 5 observation of the X-ray source 3U 1223-62 is presented. Variations in the phase of the 11.6-min pulse period have been studied. It is shown that the data are consistent with 3U 1223-62 being part of a 41-day binary system. Intrinsic increases and decreases in the pulse period of 0.5 s on a time scale of a month were also seen. The amplitude of the pulse profile was found to be greater at higher energies. The source exhibited marked and complex variations in intensity, including a 1-min burst of flux which peaked at the intensity of the Crab.

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