Neutrino Afterglow from Gamma‐Ray Bursts: ∼1018eV

Abstract
We show that a significant fraction of the energy of a gamma-ray burst(GRB) is probably converted to a burst of 10^{17}-10^{19} eV neutrinos and multiple GeV gammas that follow the GRB by > 10 s . If, as previously suggested, GRB's accelerate protons to ~10^{20} eV, then both the neutrinos and the gammas may be detectable.Comment: Accepted ApJ; added sentence re: sterile neutrinos; related material at http://www.sns.ias.edu/~jn