The Bright and Choked Gamma-Ray Burst Contribution to the IceCube and ANTARES Low-Energy Excess

Understand

The increasing statistics of the high-energy neutrino flux observed by the IceCube Observatory points towards an excess of events above the atmospheric neutrino background in the 30--400 TeV energy range.

• Such an excess is compatible with the findings of the ANTARES Telescope and it would naturally imply the possibility that more than one source class contributes to the observed flux.
• Electromagnetically hidden sources have been invoked to interpret this excess of events at low energies.
• By adopting a unified model for the electromagnetically bright and choked gamma-ray bursts and taking into account particle acceleration at the internal and collimation shock radii, we discuss whether bright and choked bursts are viable candidates.