Abstract
Gamma-ray bursts (GRBs) are the possible sources of ultra-high-energy cosmic rays (UHECRs), because of the extreme values of ultra-relativistic velocities and strong magnetic fields. In this paper we review the validity of GRBs as sources of UHECRs, and introduce our recent detailed studies of gamma-rays and neutrinos due to UHECRs utilizing comprehensive Monte Carlo codes. Future observations such as Fermi, ground-based telescopes and other facilities may provide constraints on the UHECR acceleration efficiency in GRBs. We also show a preliminary result of neutrino detection efficiency from a GRB with JEM-EUSO.
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