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Title:
The HEAO-A2 soft X-ray survey of cataclysmic variable stars - EX Hydrae during optical quiescence
Authors:
Cordova, F. A.; Riegler, G. R.
Affiliation:
AA(California Institute of Technology, Pasadena, Calif.), AB(California Institute of Technology, Jet Propulsion Laboratory, Pasadena, Calif.)
Publication:
Monthly Notices of the Royal Astronomical Society, vol. 188, July 1979, p. 103-110. (MNRAS Homepage)
Publication Date:
07/1979
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
DWARF STARS, LIGHT CURVE, NOVAE, SPACEBORNE ASTRONOMY, VARIABLE STARS, X RAY SOURCES, CURVE FITTING, HEAO 1, LUMINOUS INTENSITY, OPTICAL ACTIVITY, X RAY STARS
Comment:
A&AA ID. AAA025.142.083
Bibliographic Code:
1979MNRAS.188..103C

Abstract

Results are reported for HEAO A2 soft X-ray (below 2 keV) scanning observations of the southern dwarf nova EX Hya. An X-ray light curve is presented which shows no apparent orbital modulation. The best-fitting spectral parameters are derived for the source, and the observations are compared with the spectral behavior of the dwarf nova SS Cyg during optical quiescence. The results are discussed in terms of models for X-ray production by accreting white dwarfs.

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