  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).
