Potential Signatures of High-Energy Neutrinos Produced by Relativistic Jets in Gamma-Ray Bursts and Core-Collapse Supernovae

It will be shown that high-energy neutrinos produced by relativistic jets can be annihilated with thermal neutrinos emitted by the associated accretion disks in gamma-ray bursts and core-collapse supernovae. For a broad range of conditions, the emerging all-flavor spectrum for neutrinos above 0.1 PeV is modified by a power of energy with an index of -0.4 to -0.5. Flavor evolution of accretion-disk neutrinos does not affect this result but can change the emerging flavor composition of high-energy neutrinos. The above signatures provide potential tests of detailed models by IceCube.