Irregularities in the rate of generation of giant pulses from the Crab pulsar observed at 111 MHz.

In this paper we present our results concerning the rate of generation of the giant radio pulses (GPs) from the Crab pulsar (B0531+21). One of the main goal of this investigation was to search for a possible connection between pulsar glitches and the process of GP generation. We used for our analysis results of 9 years of daily observations at frequency 111 MHz at the Large Phased Array radio telescope of Pushchino Radio Astronomy Observatory. It was shown that the observed rate of GPs is quite unstable during the entire span of observations. We have found a significant increase in the rate of GPs with flux density larger than 80 Jy around the epoch MJD 58064, when the largest glitch ever observed in the Crab pulsar happened. Although a considerable fraction of this enhancement could have been caused by the propagation effects that have taken place in the nebula itself, we have found indications that the pulsar had demonstrated rather high degree of intrinsic irregularity in the emission of the GPs, especially the stronger ones.