Are there critical aspects in the time, energy and angular distributions of SN1987A?

TL;DR

This paper refines the analysis of SN1987A neutrino data by introducing a new emission model and evaluating its fit to observed energy, time, and angular distributions, enhancing understanding of supernova neutrino emission.

Contribution

It proposes a new parameterized model of electron antineutrino emission and assesses its effectiveness in describing SN1987A observations.

Findings

Derived parameter values with uncertainty intervals

Assessment of model adequacy in fitting data

Insights into supernova neutrino emission characteristics

Abstract

Supernova neutrinos are of considerable importance for ongoing research in astrophysics, nuclear and particle physics. Existing simulations of this complex event are increasingly sophisticated, but the accuracy with which they describe the emission is unknown. The only event observed so far with neutrino telescopes, SN1987A, still plays a crucial role and deserves to be studied meticulously. With this in mind, we have undertaken a refined analysis of the observations, taking into account the knowledge gained over the past decades. In this work, we consider a new parameterised model of electron antineutrino emission and test its adequacy in describing the observed distributions of energy, time and angle. The values of the model parameters derived from the data and their uncertainty intervals are presented and their significance is discussed.