Pulse-phase spectroscopy of Hercules X-1

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

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979mnras.188p...5p&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 188, Aug. 1979, p. 5P-9P.

Astronomy and Astrophysics

Astronomy

7

Heao 1, Pulsars, X Ray Sources, X Ray Spectroscopy, Emission Spectra, Light Curve

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 was found for a component of emission above 40 keV which is above an extrapolation from lower energies, by a factor which depends on the phase of the pulse. These data were compared to previous hard X-ray observations and possible models were discussed.

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