Hard X-ray balloon observations of compact galactic and extragalactic X-ray sources |
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| Authors: | R Staubert E Kendziorra W Pietsch R J Proctor C Reppin H Steinle J Trümper W Voges |
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| Institution: | (1) Astronomisches Institut der Universität Tübingen, Germany;(2) Max Planck-Institut für Physik und Astrophysik, Institut für Extraterrestrische Physik, Garching, Germany |
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| Abstract: | A balloon program in hard X-ray astronomy (20–200 keV) is jointly pursued by the Astronomisches Institut der Universität Tübingen (AIT) and the Max Planck-Institute für Extraterrestrische Physik in Garching (MPE). Since 1973 nine successful balloon flights have been performed from Texas and Australia. Here results on Centaurus A and on several galactic binary X-ray sources are summarized. In particular the high energy photon spectrum of Hercules X-1 and the evidence for the cyclotron line feature which was discovered by us in 1976 is reviewed. |
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