RXTE Observation of Cygnus X-1: Spectra and Timing
Abstract
We present preliminary results from the analysis of an R.XTE observation of Cyg X-1 in the hard state. We show that the observed X-ray spectrum can be explained with a model for an accretion disk corona (ADC), in which a hot sphere is situated inside of a cold accretion disk (similar to an advection dominated model). ADC Models with a slab-geometry do not successfully fit the data. In addition to the spectral results we present the observed temporal properties of Cyg X-1, i.e. the coherence-function and the time-lags, and discuss the constraints the. temporal properties imply for the accretion geometry in Cyg X-1.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- January 1997
- Bibcode:
- 1997STIN...9924872W
- Keywords:
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- Cygnus Constellation;
- Accretion Disks;
- Coronas;
- Advection;
- Time Lag;
- Spheres;
- X Rays;
- Spectra;
- Astronomy