# Supernova Neutrino Burst Monitor at the Baksan Underground Scintillation Telescope

## TL;DR

This paper reports on a long-term neutrino burst monitoring experiment at the Baksan Underground Scintillation Telescope, analyzing background stability and setting an upper limit on supernovae frequency in our galaxy over 33 years.

## Contribution

It provides a comprehensive overview of the experiment's operation, background analysis, and establishes an upper bound on galactic supernova rate based on 33 years of data.

## Key findings

- No supernova neutrino burst detected during the observation period.
- Background events and operational stability have been characterized.
- Upper limit of 0.070 supernovae per year in our galaxy set at 90% confidence level.

## Abstract

The experiment on recording neutrino bursts operates since the mid-1980. As the target, we use two parts of the facility with the total mass of 240 tons. The current status of the experiment and some results related to the investigation of background events and the stability of facility operation are presented. Over the period of June 30, 1980 to December 31, 2018, the actual observational time is 33.02 years. No candidate for the stellar core collapse has been detected during the observation period. An upper bound of the mean frequency of core collapse supernovae in our Galaxy is 0.070 year$^{-1}$ (90\% CL).