Catalog of neutrino emissions

This excess, inconsistent with the background hypothesis in the Northern Hemisphere at the 3.3{sigma} level, is associated with four sources: NGC1068, TXS0506+056, PKS1424+240, and GB6J1542+6129. This Letter presents two time-dependent neutrino emission searches on the same data sample and catalog: a point-source search that looks for the most significant time-dependent source of the catalog by combining space, energy, and time information of the events, and a population test based on binomial statistics that looks for a cumulative time-dependent neutrino excess from a subset of sources.

Compared to previous time-dependent searches, these analyses enable a feature to possibly find multiple flares from a single direction with an unbinned maximum-likelihood method. M87 is found to be the most significant time-dependent source of this catalog at the level of 1.7{sigma} post-trial, and TXS0506+056 is the only source for which two flares are reconstructed. The binomial test reports a cumulative time-dependent neutrino excess in the Northern Hemisphere at the level of 3.0{sigma} associated with four sources: M87, TXS0506+056, GB6J1542+6129, and NGC1068.