Short-term time variability of Cygnus X-1. III.
Abstract
Data from a SAS 3 observation of Cygnus X-1 have been analyzed, assuming a simple shot-noise model for the time variability. The results confirm the suggestion of Sutherland, Weisskopf, and Kahn that the shot parameters are constant when the source is in its low state. The first significant measurement of the time sense of the shot-noise pulses was performed, with the result that the average pulse shape is time-symmetric, not asymmetric as has been previously assumed.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- July 1978
- DOI:
- 10.1086/182717
- Bibcode:
- 1978ApJ...223L..17W
- Keywords:
-
- Bursts;
- Supergiant Stars;
- Time Series Analysis;
- X Ray Sources;
- Monte Carlo Method;
- Time Functions;
- Time Lag;
- Astrophysics;
- X-Ray Sources:Variations