Results of Ginga/ROSAT Simultaneous Observation of the X-Ray Burst Source 1735-444
Abstract
We present a detailed analysis of simultaneous Ginga and ROSAT observations of the X-ray burst source 1735-444, during which the source was in an unusually high luminosity state. The source shows the characteristics of an atoll source in the high-intensity (banana) state, with a general correlation between intensity and spectral hardness. A blackbody component contributes ~15%-20% of the total flux when the conventional two-component model is used to fit the spectra. We also observed a bright burst with radius expansion at this very high luminosity. The burst spectrum could not be described by a simple blackbody model. We discuss possible explanations.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- April 1997
- DOI:
- 10.1086/303856
- Bibcode:
- 1997ApJ...479..398S
- Keywords:
-
- Stars: Binaries: Close;
- Stars: Individual: Alphanumeric: 1735-444;
- X-Rays: Bursts;
- X-Rays: Stars