Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...355..468m&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 355, June 1, 1990, p. 468-472. Research supported by CNR.
Astronomy and Astrophysics
Astrophysics
7
Pulsars, Seyfert Galaxies, X Ray Binaries, Balloon-Borne Instruments, Compton Effect, Energy Spectra, Galactic Clusters
Scientific paper
Results of a balloon-borne experiment operating in the hard X-ray energy band and flown in 1981 are reported. In particular, measurements are presented of the 25-50 keV energy range flux from the binary system Cygnus X-2, the 27-65 keV flux from the X-ray pulsar Hercules X-1 detected during the short-on state, and the 25-80 keV flux from the Perseus cluster. An upper limit for the flux from the Seyfert 1 galaxy NGC 5548 in the 25-45 keV energy band is also given.
Costa Edgar
dal Fiume Daniele
Dusi Waldes
Frontera Filippo
Matt Giorgia
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