Positions of galactic X-ray sources: 55° < lII < 320°
Abstract
PRECISE (20-40'') celestial positions of 10 galactic X-ray sources in the region 55° < lII < 320° are reported here. These positions were measured with the rotating modulation collimator detectors on the SAS-3 X-ray observatory. The data were taken as part of a systematic survey of the galactic plane1-7. Five positions reaffirm the identification of optical counterparts for 4U0614+09 (refs 8, 9), 2S0053+604 (refs 1, 10), 4U1145-61 (refs 1, 11-13), GX301-2 (refs 1, 12, 14), and GX304-1 (refs 1 15). Positions for the latter four sources and for 4U0142+61 are refinements of previously reported SAS-3 positions1,16. The position for 2S0114+650 has led to the discovery of an optical counterpart17,18. Positions for 4U0142+61, 4U0919-54, A1239-59, and 4U1254-69 are also presented, The optical counterparts of these sources are still to be discovered. The source 2S0114+650 was discovered as part of this work.
- Publication:
-
Nature
- Pub Date:
- June 1978
- DOI:
- 10.1038/273364a0
- Bibcode:
- 1978Natur.273..364D
- Keywords:
-
- Position (Location);
- Sas;
- Spaceborne Astronomy;
- X Ray Sources;
- Calibrating;
- Collimators;
- Satellite Observation;
- Temperature Effects;
- Astrophysics