A1118-61
Abstract
N. Lund, S. Brandt, and A. J. Castro-Tirado, communicate, on behalf of the Granat WATCH collaboration (Danish Space Research Institute, Lyngby, and Space Research Institute, Moscow): "The transient x-ray pulsar A1118-61, originally discovered by the Ariel V satellite in 1974, has been observed again by the WATCH all-sky monitor on Granat. The source was observed above the detection limit (about 100 mCrab) between Jan. 28 and 30. The peak flux in the 8- to 20-keV band was 500 mCrab. The period of the pulsar was determined as 406.4 +/- 0.2 s (Ariel V obtained 405.3 +/- 0.6 s). A1118-61 has been associated with the Be star He 3-640 (Henize 1976, Ap.J. Suppl. 30, 491). Follow-up observations are encouraged."
- Publication:
-
International Astronomical Union Circular
- Pub Date:
- February 1992
- Bibcode:
- 1992IAUC.5448....1L