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Hard X-ray observations of the eclipsing binary EX Hydrae

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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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Authors and Affiliations

  1. Institut für Astronomie und Astrophysik, TU Berlin, FRG

    K. Beuermann

  2. MPI für Extraterrestrische Physik, Garching b. München, FRG

    K. Beuermann

  3. ESOC, Darmstadt, FRG

    J. Osborne

Authors
  1. K. Beuermann
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  2. J. Osborne
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Beuermann, K., Osborne, J. Hard X-ray observations of the eclipsing binary EX Hydrae. Space Sci Rev 40, 117–120 (1985). https://doi.org/10.1007/BF00212873

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