Variability of Soft X-Ray Emission of Ex Hydrae Observed with Einstein Observatory
The cataclysmic variable star EX Hydrae has been observed with the High Resolution Imager (HRI) and the Imaging Proportional Counter (IPC) onboard the Einstein Observatory. The X-ray position is coincident within 3 arcsec of the optical position as measured on Schmidt survey plates. During a 15 1/2 hour observation with IPC we have searched for a modulation of the X-ray flux. Strong evidence for a 67 min period (one of two known optical periods) has been found in the energy range 0.1–3.5 keV with the IPC. The time dependence of modulations is used to discuss a model and evolutionary status of this close binary system.
KeywordsHelium Tral Spectrophotometry Lawson Bital
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