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Correlating prompt GRB photons with neutrinos · Around

2007

Correlating prompt GRB photons with neutrinos

Taboada, Ignacio, D'Agostino, Michelangelo V.

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It is standard in theoretical neutrino astrophysics to use a broken power law approximation, based on the Band function, to describe the average photon flux of the prompt emission of Gamma-Ray Bursts.

We will show that this approximation overestimates the contribution of high energy gamma-rays (and underestimates low energy gamma-rays).
As a consequence models that rely on this approximation overestimate neutrino event rate by a factor of approx 2 depending on Earth's column density in the direction of the GRB.
Furthermore the characteristic energy of neutrinos that trigger a km^3 detector is typically 10^{16} eV, higher than previously predicted.

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