X-ray observations of SS433 by Ginga
Abstract
We observed SS433 with the X-ray astronomy satellite Ginga for five days, and detected a drop in X-ray intensity centered at the phase of the optical primary minimum. The intense broad line at E = 7 keV in the observed energy spectrum is considered to be the blue-shifted iron emission line from the jet. The intensity of the emission line changed almost proportionally to the continuum intensity at 5 - 10 keV during the eclipse. The spectral hardness also changed together with the intensity, which suggests that this is indeed an eclipse of a harder X-ray component near the base of the jet. The eclipse fraction of the line is ≅ 50%, indicating that the X-ray emission region of the jet is larger than the companion. Constraints on the mass of the compact object and the length of the X-ray emitting jet are derived from the geometrical analysis of the light curve.
- Publication:
-
Advances in Space Research
- Pub Date:
- 1990
- DOI:
- 10.1016/0273-1177(90)90128-M
- Bibcode:
- 1990AdSpR..10b.109K
- Keywords:
-
- Eclipsing Binary Stars;
- Ginga Satellite;
- Spaceborne Astronomy;
- X Ray Astronomy;
- X Ray Binaries;
- X Ray Spectra;
- Emission Spectra;
- Japanese Spacecraft;
- Light Curve;
- Astrophysics