GINGA and ROSAT observations of the cataclysmic variable S193

Details GINGA and ROSAT observations of the cataclysmic variable S193 GINGA and ROSAT observations of the cataclysmic variable S193

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994pasp..106..616s&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 106, no. 700, p. 616-618

Astronomy and Astrophysics

Astronomy

5

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

Scientific paper

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 yr 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.

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