Neutrino energy distributions of astrophysical sources: the GRB example.

Neutrino astronomy is an emerging field allowing us to study the most energetic phenomena in the Universe. While some first neutrino sources have been recently identified, the origin of the full high-energy diffuse neutrino flux is still unknown. Gamma-ray bursts (GRBs) were believed to be a promising candidate to contribute to the diffuse flux. However, no significant counterpart neutrinos were observed in association with GRBs, despite numerous searches. To assess if GRBs are capable of emitting high-energy neutrinos, more refined analyses are now required. This project proposes an original approach based on the construction of "Neutrino Energy Distributions" (NEDs), which can be considered as the neutrino analog of spectral energy distributions in electromagnetic astronomy. By combining theoretical predictions from various models, NEDs provide a powerful tool to perform detailed, multi-energy studies. This contribution will first motivate the necessity of NEDs in neutrino astronomy, then review the theoretical neutrino emission processes in Gamma-ray Bursts and finally present two practical analyses examples.