Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ap%26ss..75..211f&link_type=abstract
(Symposium on Cosmic Gamma-Ray Bursts, Toulouse, France, Nov. 26-29, 1979.) Astrophysics and Space Science, vol. 75, no. 1, Mar.
Astronomy and Astrophysics
Astronomy
1
Bursts, Gamma Ray Astronomy, Radiation Detectors, Balloon Flight, Cosmic Rays, Cosmic X Rays, Scintillation Counters, Time
Scientific paper
The detection of gamma-ray bursts of duration from 4 sec to over 1 min which are most likely due to phosphorescence within the detector rather than actual cosmic events is reported. The three bursts were detected at different times by only one of two independent hard X-ray detectors based on a NaI (Tl) crystal on board a transatlantic balloon flight acquiring data in two energy channels (20-150 and 150-300 keV) over 60 h of sky observation. The time profiles of the burst-like events are typical of celestial gamma-ray bursts, however their detection by only one of the detectors indicates that the bursts have another origin, possibly the interaction of high-Z, high-energy cosmic rays with a single detector. It is concluded that detections of gamma-ray bursts based only on a rate increase by a single scintillator should always be confirmed by at least one other instrument.
Frontera Filippo
Fuligni Franco
Morelli Ennio
Pizzichini Graziella
Ventura Giulio
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