Timing coincidence search for supernovae neutrinos with optical transient surveys*

Neutrinos allow us to peer into the inner workings of stars during core collapse, teaching us about the different stages and processes occurring. Currently, there has only been a single observed event that is a source of supernova neutrinos, SN1987A. Since then, most studies on supernova neutrinos have looked at different distance regimes, Galactic/local supernovae and the diffuse supernova neutrino background. We propose an intermediate distance regime in which there exists two separate approaches for detecting core-collapse supernova neutrinos at next generation detectors like Hyper-Kamiokande. The first approach relies on a close supernova that results in at least one measurable neutrino event. Transient surveys that focus on nearby galaxies, such as DLT40, will be able to provide the needed information regarding the timing of transience. The second approach relies on stacking core-collapse supernovae such that their summed events yield a detectable amount of neutrinos. Large transient surveys such as the upcoming LSST will be able to observe large amounts of supernovae over its 10 year lifetime. In both of these approaches, it is vitally important for the surveys to be able to pinpoint the time of core collapse to within the timescales of hours for confident neutrino detections.