Observing Supernova Neutrino Light Curves with Super-Kamiokande. IV. Development of SPECIAL BLEND: a New Public Analysis Code for Supernova Neutrinos

TL;DR

This paper introduces SPECIAL BLEND, a new public analysis code that accurately estimates supernova parameters from neutrino light curves, enhancing preparedness for future supernova observations.

Contribution

The paper presents a novel, publicly available analysis code that improves supernova parameter estimation from neutrino data compared to previous methods.

Findings

Estimates supernova parameters within 10% accuracy up to 20 kpc.

Achieves ~60% accuracy at 60 kpc with Hyper Kamiokande.

Provides a user-friendly web-based tool for the community.

Abstract

Supernova neutrinos are invaluable signals that offer information about the interior of supernovae. Because a nearby supernova can occur at any time, preparing for future supernova neutrino observation is an urgent task. For the prompt analysis of supernova neutrinos, we have developed a new analysis code, ``Supernova Parameter Estimation Code based on Insight on Analytic Late-time Burst Light curve at Earth Neutrino Detector (SPECIAL BLEND)''. This code estimates the parameters of supernova based on an analytic model of supernova neutrinos from the proto-neutron star cooling phase. For easy availability to the community, this code is public and easily runs on web environments. SPECIAL BLEND can estimate the parameters better than the analysis pipeline we developed in the previous paper. By using SPECIAL BLEND, we can estimate the supernova parameters within $10\%$ precision up to $\sim 20\,{\rm kpc}$ and $\sim 60\,{\rm kpc}$ (Large Magellanic Cloud contained) with Super Kamiokande and Hyper Kamiokande, respectively.