Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982ans..conf..121m&link_type=abstract
In Max-Planck Inst. Phys. and Astrophys. Accreting Neutron Stars p 121-124 (SEE N83-15179 05-88)
Astronomy and Astrophysics
Astrophysics
Energy Spectra, Hercules Nova, Line Spectra, Periodic Variations, Pulse Rate, Time Dependence, X Ray Sources, Proportional Counters, Spectrum Analysis, X Ray Spectra
Scientific paper
The X-ray observations Her X-1 include the temporal and energy dependence of spectral features both continuum and line, during the pulse phase, binary phase and the 35 day ON-OFF cycle. The observations of the X-ray intensity and spectral features of the source during mid on 35 is also of considerable interest since it provides further constraints for the geometrical models of the X-ray source. There is no consistent model for the 35 day cyclic variation of the X-ray intensity. Also, little data is available about the variable nature of the emission feature. Two observations separated by a year in 1980 and 1981 were carried out during the mid on phase of Her X-1, by using xenon filled multiwire proportional chambers. The time averaged spectral results of Her X-1 in the 15-150 keV energy range are presented. The possible case of the line centroid variability seen during 1980 experiment is also discussed.
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