The binary X-ray pulsar 3U 1223-62.
Abstract
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.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- September 1978
- DOI:
- 10.1093/mnras/184.1.67P
- Bibcode:
- 1978MNRAS.184P..67W
- Keywords:
-
- Binary Stars;
- Pulsars;
- X Ray Sources;
- Ariel 5 Satellite;
- Periodic Variations;
- Proportional Counters;
- Astronomy;
- Binaries:X-Ray Sources;
- Periods:X-Ray Sources