Extensive Air Shower Arrays as Detectors of Prompt Gamma Rays from Supernovae Explosions

Details Extensive Air Shower Arrays as Detectors of Prompt Gamma Rays from Supernovae Explosions Extensive Air Shower Arrays as Detectors of Prompt Gamma Rays from Supernovae Explosions

Dec 1970

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970natur.228.1181o&link_type=abstract

Nature, Volume 228, Issue 5277, pp. 1181 (1970).

Computer Science

Scientific paper

SUPERNOVAE explosions with total energies of 1049 to 1052 ergs constitute the most energetic single events in our galaxy1,2. Pulsars, which now appear to be rotating neutron stars formed in supernovae, contain similar amounts of energy3,4, and it is believed that a large portion of this energy goes into accelerating relativistic particles, producing cosmic rays3-5. The acceleration mechanism models fall into two general classes: the gradual transfer of rotational energy through electromagnetic channels to particles4,6, and the shock wave hypothesis where most of the cosmic rays are accelerated during the initial explosion as the outer layers of the star are blown out at relativistic speeds5,7. As a consequence of the shock wave acceleration mechanism Colgate has shown that a burst of photons of total energy 5 × 1047 ergs per decade should accompany the explosion. The time width of this pulse is a fraction of a microsecond at the maximum photon energy of few GeV and proportionally longer at lower energies8. An experiment designed to detect this type of pulse using the atmospheric fluorescence method has already achieved the sensitivity and operation time necessary to observe such pulses, with negative results as yet9.

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