Irregularities in the rate of generation of giant pulses from the Crab pulsar observed at 111 MHz. (arXiv:1905.05261v1 [astro-ph.HE])

Irregularities in the rate of generation of giant pulses from the Crab pulsar observed at 111 MHz. (arXiv:1905.05261v1 [astro-ph.HE])
<a href="http://arxiv.org/find/astro-ph/1/au:+Kazantsev_A/0/1/0/all/0/1">A. N. Kazantsev</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Potapov_V/0/1/0/all/0/1">V. A. Potapov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Pshirkov_M/0/1/0/all/0/1">M. S. Pshirkov</a>

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.

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.

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