Computer Science – Sound
Scientific paper
Dec 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...234..477f&link_type=abstract
Astrophysical Journal, Part 1, vol. 234, Dec. 1, 1979, p. 477-480.
Computer Science
Sound
12
Balloon Sounding, Energy Spectra, Seyfert Galaxies, X Ray Sources, Background Radiation, Balloon Flight, Bremsstrahlung, Diffuse Radiation, Emission Spectra
Scientific paper
Results of the analysis of hard X-ray data obtained during a 1976 transatlantic balloon flight are reported. NGC 4151 was clearly detected with a power-law photon spectrum dN/dE proportional to E to the -(1.2 plus or minus 0.3) power. A new source was also detected in the vicinity of MCG 8-11-11. Association of this object with this Seyfert galaxy is suggested. The contribution of Seyfert galaxies to diffuse background in the hard X-ray range is discussed.
Frontera Filippo
Fuligni Franco
Morelli Ennio
Ventura Giulio
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