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Pulse phase spectroscopy of Hercules X-1. [6 to 18 and 40 to 60 keV]

Technical Report ·
OSTI ID:5364196
; ;
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.
Research Organization:
National Aeronautics and Space Administration, Greenbelt, MD (USA). Goddard Space Flight Center
OSTI ID:
5364196
Report Number(s):
N-79-28078
Country of Publication:
United States
Language:
English

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Related Subjects

640103* -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC RADIO SOURCES
COSMIC RAY SOURCES
COSMIC X-RAY SOURCES
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
ENERGY RANGE
ENERGY SPECTRA
HARD X RADIATION
IONIZING RADIATIONS
KEV RANGE
KEV RANGE 01-10
KEV RANGE 10-100
MATHEMATICAL MODELS
PULSARS
PULSES
RADIATIONS
SATELLITES
SPECTRA
STAR MODELS
X RADIATION
X-RAY SPECTRA