Search for Giant Pulses of radio pulsars at frequency 111 MHz with LPA radio telescope

TL;DR

This study used the LPA radio telescope to observe 71 pulsars at 111 MHz, discovering new giant pulses and analyzing their statistical properties, revealing complex behaviors and extremely strong pulses from low magnetic field pulsars.

Contribution

First detection of giant pulses from pulsars B0301+09 and B1237+25 at 111 MHz, with analysis of their statistical properties and behavior over time.

Findings

Discovered giant pulses from B0301+09 and B1237+25.

Detected the strongest low magnetic field pulsar giant pulse at 16.8 kJy.

Found that GRP energy distribution spectra are complex and sometimes unstable.

Abstract

We have used the unique low frequency sensitivity of the Large Phased Array radio telescope of Pushchino Radio Astronomy Observatory to collect dataset of the single pulse observations of second period pulsars of the Northern hemisphere. During observational sessions of 2011 - 2017 yrs. We have collected data on 71 pulsars at 111 MHz frequency using digital pulsar receiver. We have discovered Giant Radio Pulses (GRP) from pulsars B0301+09 and B1237+25, and confirmed early reported generation of anomalously strong (probable giant) pulses from B1133+16 on statistically significant dataset. Data for these pulsars and from B0950+08, B1112+50, early reported as pulsars generating GRPs were analyzed to evaluate their behavior on long time intervals. It was found that statistical criterion (power-law spectrum of GRPs distribution on energy and peak flux density) seems not to be strict for pulsars with the low magnetic field on light cylinder. Moreover, spectra of some of these pulsars demonstrate unstable behavior with the time and have complex multicomponent shape. In the dataset of B0950+08 we have detected strongest GRP from pulsars with the low magnetic field on light cylinder ever reported having the peak flux density as strong as 16.8 kJy.