Discovery., optical identification of 2S 0921-630.
Abstract
The discovery of a faint X-ray source at approximately 282 deg galactic longitude, -9 deg galactic latitude with the rotation modulation collimator X-ray detectors aboard SAS 3 is reported. The source is designated 2S 0921-630 and is tentatively identified, on the basis of an optical search, with a 17th magnitude star exhibiting the He II line at 4686 A and H-beta in emission. The optical spectrum of this star is shown to be similar to those of the optical counterparts of Sco X-1 and other such galactic X-ray sources. It is suggested that 2S 0921-630 may belong to the class of low-luminosity galactic X-ray binaries.
- Publication:
-
Nature
- Pub Date:
- December 1978
- DOI:
- 10.1038/276799a0
- Bibcode:
- 1978Natur.276..799L
- Keywords:
-
- Binary Stars;
- Stellar Magnitude;
- Visual Observation;
- X Ray Sources;
- Emission Spectra;
- Galactic Rotation;
- H Beta Line;
- Helium;
- Sas-3;
- X Ray Binaries;
- X Ray Stars;
- Astrophysics;
- BINARY STARS;
- STELLAR MAGNITUDE;
- VISUAL OBSERVATION;
- X RAY SOURCES;
- EMISSION SPECTRA;
- GALACTIC ROTATION;
- H BETA LINE;
- HELIUM;
- SAS-3;
- X RAY BINARIES;
- X RAY STARS