Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ssrv...30..327u&link_type=abstract
(European Space Agency, ESLAB Symposium on X-ray Astronomy, 15th, Amsterdam, Netherlands, June 22-26, 1981.) Space Science Revie
Astronomy and Astrophysics
Astronomy
1
Eclipsing Binary Stars, Pulsars, Stellar Spectra, Variable Stars, X Ray Astronomy, X Ray Sources, Balloon-Borne Instruments, Emission Spectra, Proportional Counters
Scientific paper
Hard X-ray measurements are presented of the Her X-1 spectrum during a mid turn-on in April 1980. Two multiwire spectroscopic proportional counters were used with a geometric area of 900 sq cm each in the range of 15 to 170 keV. Results confirm the presence of a strong emission line in Her X-1 even during the mid turn-on state, and the high value of the integral hard X-ray flux from the source can be correlated with the strong variability of the source.
Bazzano Angela
La Padula C.
Manchanda Ravi K.
Polcaro Vito Francesco
Ubertini Pietro
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