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X-ray spectra of Hercules X-1. 3: Pulse phase dependence in high energy continuumPulse phase-dependent spectral changes in the high energy (less than 20 keV) continuum of Hercules X-1 were observed. Cyclotron absorption of underlying continua can reproduce the observed angular dependence in the high energy cutoff. Implications of this model, which include the possibility of determining the angular separation between the line of sight and the neutron star magnetic field if the absorbing electron spectrum is known are discussed.
Document ID
19780016066
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Pravdo, S. H. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Bussard, R. W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Becker, R. H. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Boldt, E. A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Holt, S. S. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Serlemitsos, P. J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Swank, J. H. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 3, 2013
Publication Date
March 1, 1978
Subject Category
Astronomy
Report/Patent Number
NASA-TM-78107
Report Number: NASA-TM-78107
Accession Number
78N24009
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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