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Pravdo, S.H.; Bussard, R.W.; White, N.E.
National Aeronautics and Space Administration, Greenbelt, MD (USA). Goddard Space Flight Center1979
National Aeronautics and Space Administration, Greenbelt, MD (USA). Goddard Space Flight Center1979
AbstractAbstract
[en] The 6-18 keV and the 40-60 keV X-ray spectra of Hercules X-1 were simultaneously observed with the A-2 experiment on HEAO 1. By combining these measurements with the results of an earlier observation of this X-ray pulsar, evidence is found for a component of emission above 40 keV which is above an extrapolation from lower energies, by a factor which is pulse phase dependent. These data are compared to previous hard X-ray observations, and possible models are discussed
Original Title
6 to 18 and 40 to 60 keV
Primary Subject
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May 1979; 12 p; Available from NTIS., PC A02/MF A01
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Report
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