Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984ncimc...7..648f&link_type=abstract
(Convegno Nazionale di Fisica Cosmica, 2nd, L'Aquila, Italy, May 29-June 1, 1984) Nuovo Cimento C, Serie 1 (ISSN 0390-5551), vol
Astronomy and Astrophysics
Astronomy
1
Balloon-Borne Instruments, Crab Nebula, Pulsars, Scintillation Counters, X Ray Astronomy, X Ray Sources, Power Spectra, X Ray Spectra
Scientific paper
The aims and progress of the program of balloon-borne NaI(Tl)-scintillator-array hard-X-ray (20-200-keV) astronomical observations using the payload described by Frontera et al. (1982) are surveyed, and some sample results from the three flights undertaken since 1980 are presented. The observations of the Crab pulsar in October 1980 are characterized in detail, and a power-law spectrum K(E/100) to the -alpha photons/sq cm s keV is derived, with K = 0.000637 + or - 0.000031 and alpha = 2.27 + or - 0.14.
dal Fiume Daniele
Frontera Filippo
Morelli Ennio
Spada Giorgio
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