# The core collapse supernova rate from 24 years of data of the Large Volume Detector

## TL;DR

This paper reports a 24-year search for supernova neutrino bursts using the Large Volume Detector, setting an upper limit on the core collapse supernova rate in the Milky Way due to no positive detections.

## Contribution

The study provides a comprehensive 24-year neutrino data analysis from LVD, establishing an upper limit on supernova rates in our galaxy.

## Key findings

- No supernova neutrino bursts detected in 24 years
- Upper limit of 0.1 supernovae per year in the Milky Way
- Extended the observational constraints on galactic supernova rates

## Abstract

The Large Volume Detector (LVD) at INFN Laboratori Nazionali del Gran Sasso, Italy is a 1 kt liquid scintillator neutrino observatory mainly designed to study low energy neutrinos from Gravi- tational Stellar Collapses (GSC) with 100% efficiency over the entire Galaxy. Here we summarize the results of the search for supernova neutrino bursts over the full data set lasting from June 1992 to May 2016 for a total live time of 8211 days. In the lack of a positive observation, either in standalone mode or in coincidence with other experiments, we establish the upper limit to the rate of GSC event in the Milky Way: 0.1/year at 90% c.l.