Author: Kohta Murase
Abstract: The neutrino is an important messenger to reveal connections with the cosmic-ray origin and mechanisms of energetic astrophysical explosions such as gamma-ray bursts (GRBs) and supernovae. I review implications of recent IceCube observations, which have started to constrain some theoretical models for prompt emission. In particular, such constraints are relevant to test the hypothesis that ultra-high-energy cosmic rays come from GRBs. Also, I consider predictions for different scenarios of the prompt emission (e.g., the photosphere scenario), and discuss the potential importance of other GRB classes (e.g., low-luminosity GRBs).