Pulse phase spectroscopy of Hercules X-1

Details Pulse phase spectroscopy of Hercules X-1 Pulse phase spectroscopy of Hercules X-1

May 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979stin...7928078p&link_type=abstract

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Astronomy and Astrophysics

Astronomy

Heao 1, Hercules Nova, X Ray Spectra, X Ray Spectroscopy, Astronomical Models, Astronomical Spectroscopy, Emission Spectra, Energy Spectra

Scientific paper

The 6-18 keV and the 40-60 keV X-ray spectrum 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.

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