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The search of astrophysical impulsive sources emitting low-energy neutrinos and Gravitational Waves (GWs) can be challenging for different reasons: weak signals at the source, large distance of the source, high background inside the detectors. A joint search in a network of GWs and $\nu$ detectors can provide several benefits: temporal coincidences of GWs and MeV $\nu$ bursts improve sensitivity and confidence of detection and a correlation studies of the two probes provide complementary informations on the physical mechanisms at work inside the source. In this paper we summarise the strategy for such a combined search defined during the last years. Moreover, we apply, for the first time in this context, a novel method that increases the probability of identifying impulsive astrophysical bursts of low-energy neutrinos. The proposed approach exploits the temporal structure differences between astrophysical bursts and background fluctuations and it allows us to pinpoint weak signals otherwise unlikely to be detected.

Combined search of MeV ν and gravitational waves from astrophysical impulsive sources