A search for high-energy cosmic gamma-ray bursts |
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Authors: | C Morello L Periale and G Navarra |
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Institution: | (1) Istituto di Cosmo-geofisica del C.N.R., Torino, Italia;(2) Istituto di Fisica Generale dell'Università, Torino, Italia |
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Abstract: | Summary A search has been made for excesses of cosmic-ray counting rates at primary energiesE
01>5 GeV andE
04>2·104 GeV over the time scalet=(1÷100) ms. The measurement was performed by means of a small extensive air shower array operating at mountain altitude (3500
m a.s.l.). During the running time 111 cosmic gamma-ray bursts were detected by satellites; 10 of them certainly (55 probably)
above the horizon of the detector. No significant counting rate excess has been recorded out of the statistical fluctuations.
Also the search for correlations with satellite events has given a negative result. The upper limit for high-energy cosmic
gamma-ray flux in bursts isϕ
1(E>E
01)<4·10−5 (t = time scale in ms),ϕ
4(E>E
04)<1.6·10−5erg/cm2.
Paper presented at the 2o Convegno Nazionale di Fisica Cosmica, held at L'Aquila, 29 May–2 June 1984. |
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Keywords: | Cosmic rays |
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