The hard X-ray flux from GAM CAS during 1970-73.
Abstract
X-ray observations are presented of the Be star Gamma Cas obtained with the Uhuru satellite between December 27, 1970, and February 15, 1973. Though variable, the X-ray source (MX 0053+60) persisted throughout the life-time of the Uhuru satellite, with an average daily flux (2-6 keV) of 4.1 counts/s or 4.0 x 10 to the 32nd ergs/s if the star is at a distance of 220 pc. Variations on time scales of months, days, and hours were observed, but a pulsation period was not found. An analysis is made of the continuous X-ray spectrum, and the X-ray flux and its behavior during the early 1970s are compared with more recent observations from the SAS-3, Copernicus, HEAO-1, and Einstein satellites.
- Publication:
-
Publications of the Astronomical Society of the Pacific
- Pub Date:
- February 1982
- DOI:
- 10.1086/130955
- Bibcode:
- 1982PASP...94..157P
- Keywords:
-
- B Stars;
- Early Stars;
- Radiant Flux Density;
- Stellar Spectrophotometry;
- Uhuru Satellite;
- X Ray Sources;
- Bremsstrahlung;
- Cassiopeia Constellation;
- Data Reduction;
- Heao;
- Oao 3;
- Periodic Variations;
- Sas-3;
- Spectral Energy Distribution;
- Spectrum Analysis;
- Astrophysics