Extended observations of Vela X-1 by OSO 8.
Abstract
The Goddard Space Flight Center (GSFC) Cosmic X-Ray experiment aboard OSO 8 viewed the X-ray binary pulsar, Vela X-1, on three occasions from late 1975 through late 1976. The X-ray spectrum is well-represented by a power law modified by photoelectric absorption, a high-energy cutoff, and a line feature at about 6.8 keV. When combined with other observations, the reported measurements show that the pulse period is not decreasing monotonically. The three eclipses observed all indicate a significant eclipse flux.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- May 1978
- DOI:
- 10.1086/156094
- Bibcode:
- 1978ApJ...221..912B
- Keywords:
-
- Eclipsing Binary Stars;
- Oso-8;
- Pulsars;
- Spaceborne Astronomy;
- Stellar Spectrophotometry;
- X Ray Spectra;
- Absorption Spectra;
- Shock Waves;
- Stellar Spectra;
- Stellar Winds;
- Astrophysics;
- Periods:X-Ray Pulsars;
- X-Ray Binaries:X-Ray Spectra