Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978grsa.rept..331t&link_type=abstract
In NASA. Goddard Space Flight Center Gamma Ray Spectry. in Astrophys. p 331-345 (SEE N78-31971 22-88)
Astronomy and Astrophysics
Astrophysics
2
Astronomical Spectroscopy, Cyclotron Radiation, Hercules Nova, Line Spectra, Spectral Line Width, X Ray Sources, Bremsstrahlung, Neutron Stars, Stellar Magnetic Fields, Stellar Mass Accretion, Telescopes
Scientific paper
Data obtained during four balloon flight observations of hard X-ray emission from Her X-1 provide strong support for the existence of a spectral line feature at 54 keV to 58 keV, while the existence of a second harmonic is uncomfirmed. Because it is difficult to explain the observed feature by a second continuum spectrum or by atomic or nuclear processes, an interpretation in terms of a cyclotron line seems likely. There are two possibilities. There may be a cyclotron absorption feature at approximately 42 keV, and a possible second one at approximately 80 keV. In particular there may be a rather broad absorption feature between the spectral break (25 keV) and approximately 40 keV.
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