Hard X-ray observations of the eclipsing binary EX Hydrae |
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| Authors: | K Beuermann J Osborne |
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| Institution: | (1) Institut für Astronomie und Astrophysik, TU Berlin, FRG;(2) MPI für Extraterrestrische Physik, Garching b. München, FRG;(3) ESOC, Darmstadt, FRG |
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| Abstract: | We present light curves of EX Hydrae in the 1–10 keV range obtained with the medium energy experiment of EXOSAT. The 67-min modulation was observed with a peak-to-peak amplitude of 36 % in the 1–4 keV range and of 24 % in the 4–9 keV range. Newly discovered was a partial X-ray eclipse of  3 min full width which coincides with the optical eclipse and is seen at all energies. The results are interpreted in terms of an intermediate-polar (DQ Her star) model of EX Hydrae. |
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