Features of Kamiokande-II, IMB and Baksan observations and their interpretation in a two-component model for the signal

TL;DR

This paper analyzes SN1987A neutrino detection data from multiple observatories, fitting them with a simple two-component model consistent with supernova explosion expectations and predicting relic neutrino signals.

Contribution

It introduces a straightforward two-component model that fits SN1987A data well and supports standard supernova explosion scenarios.

Findings

Data fit supports standard supernova models

Electron antineutrino flux predictions align with expectations

Relic neutrino signal estimates are provided

Abstract

We consider the time, angular and energy distributions of SN1987A events discussing the quality of their agreement with the expectations. A global interpretation is performed considering a simple model, based on the standard scenario for the explosion. Despite the contrasting and confusing indications, a straightforward fit to the data provides a result that does not contradict but rather supports the expectations. The calculated electron antineutrino flux is applied to predict the relic neutrino signal.