Results of Ginga/ROSAT Simultaneous Observation of the X-Ray Burst Source 1735-444

Details Results of Ginga/ROSAT Simultaneous Observation of the X-Ray Burst Source 1735-444 Results of Ginga/ROSAT Simultaneous Observation of the X-Ray Burst Source 1735-444

Apr 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...479..398s&link_type=abstract

Astrophysical Journal v.479, p.398

Astronomy and Astrophysics

Astronomy

5

Stars: Binaries: Close, Stars: Individual Alphanumeric: 1735-444, X-Rays: Bursts, X-Rays: Stars

Scientific paper

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.

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