A study of four X-ray sources with properties similar to Sco X-1.
Abstract
Copernicus and Ariel V observations are reported for four X-ray sources which exhibit a correlation of intensity and spectral slope on timescales similar to that seen in Sco X-1. These sources include 3U 0614+09, 3U 1702-36 (Sco X-2), 3U 1728-16 (GX 9+9), and 3U 1758-25 (GX 5-1). The mean spectral parameters of each source are given, the short- and long-term behavior of different sources are described, and it is suggested that the similar X-ray characteristics of these four sources and Sco X-1 might indicate some degree of physical similarity as well as a similar optical and radio appearance. The observations are shown to strengthen the case for identifying 3U 0614+09 and 3U 1728-16 with relatively faint blue stars in or near their X-ray error boxes.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- December 1976
- DOI:
- 10.1093/mnras/177.3.513
- Bibcode:
- 1976MNRAS.177..513M
- Keywords:
-
- Spaceborne Astronomy;
- Stellar Spectra;
- X Ray Astronomy;
- X Ray Sources;
- Ariel 5 Satellite;
- Astrophysics;
- Binary Stars;
- Energy Spectra;
- Long Term Effects;
- Oao 3;
- Spectrum Analysis;
- Stellar Luminosity;
- Astrophysics