GINGA and ROSAT Observations of the Cataclysmic Variable S193
Abstract
The cataclysmic variable S193 was observed with the Ginga and ROSAT satellites along with ground-based optical observations. The bremsstrahlung temperatures and the column densities derived from these two observations are noticeably different. However, since the observations were separated by 3 years and took place at different optical magnitudes, it is not clear whether this is related to an intrinsic change in the system or to a two component source of X-rays. While the x-ray data are not sufficient to accomplish a detailed analysis for periodicities, the Ginga data place an upper limit of 40% on the amplitude of any sinusoidal modulation. (SECTION: Stars)
- Publication:
-
Publications of the Astronomical Society of the Pacific
- Pub Date:
- June 1994
- DOI:
- 10.1086/133421
- Bibcode:
- 1994PASP..106..616S
- Keywords:
-
- Bremsstrahlung;
- Cataclysmic Variables;
- Plasma Density;
- X Ray Astronomy;
- X Ray Binaries;
- Amplitudes;
- Astronomical Photometry;
- Ginga Satellite;
- Light Curve;
- Modulation;
- Periodic Variations;
- Rosat Mission;
- Sky Surveys (Astronomy);
- Space Observations (From Earth);
- Stellar Magnitude;
- Astronomy;
- STARS: INDIVIDUAL: S193;
- CATACLYSMIC VARIABLES