SNEWS 2.0: A Next-Generation SuperNova Early Warning System for Multi-messenger Astronomy

TL;DR

SNEWS 2.0 is an upgraded supernova early warning system designed to leverage multi-messenger astronomy, enhancing detection sensitivity and scientific insights from the next Galactic supernova through improved neutrino detection and coordination.

Contribution

The paper proposes a next-generation SNEWS 2.0 system that enhances early supernova detection capabilities by integrating multi-messenger data and optimizing neutrino detection sensitivity.

Findings

Design of an upgraded SNEWS 2.0 system.

Enhanced sensitivity to supernova neutrino signals.

Framework for multi-messenger coordination during supernova events.

Abstract

The next core-collapse supernova in the Milky Way or its satellites will represent a once-in-a-generation opportunity to obtain detailed information about the explosion of a star and provide significant scientific insight for a variety of fields because of the extreme conditions found within. Supernovae in our galaxy are not only rare on a human timescale but also happen at unscheduled times, so it is crucial to be ready and use all available instruments to capture all possible information from the event. The first indication of a potential stellar explosion will be the arrival of a bright burst of neutrinos. Its observation by multiple detectors worldwide can provide an early warning for the subsequent electromagnetic fireworks, as well as signal to other detectors with significant backgrounds so they can store their recent data. The Supernova Early Warning System (SNEWS) has been operating as a simple coincidence between neutrino experiments in automated mode since 2005. In the current era of multi-messenger astronomy there are new opportunities for SNEWS to optimize sensitivity to science from the next Galactic supernova beyond the simple early alert. This document is the product of a workshop in June 2019 towards design of SNEWS 2.0, an upgraded SNEWS with enhanced capabilities exploiting the unique advantages of prompt neutrino detection to maximize the science gained from such a valuable event.