Search for giant pulses of radio pulsars at frequency 111 MHz with LPA radio telescope

• 来源期刊: 天文和天体物理学研究
• 年，卷（期）: 2018,（8）
• 页码范围: 71-82
• 页数: 12页
• 语种: 英文
• DOI: 10.1088/1674-4527/18/8/97

摘要

We have used the unique low frequency sensitivity of the Large Phased Array (LPA) radio telescope of Pushchino Radio Astronomy Observatory to collect a dataset consisting of single pulse observations of second period pulsars in the Northern Hemisphere.During observation sessions in 2011-2017,we collected data on 71 pulsars at a frequency of 111 MHz using a digital pulsar receiver.We have discovered Giant Radio Pulses (GRPs) from pulsars B0301+09 and B 1237+25,and confirmed earlier reported generation of anomalously strong (probable giant) pulses from B 1133+16 in a statistically significant dataset.Data for these pulsars and from B0950+08 and B 1112+50,earlier reported as pulsars generating GRPs,were analyzed to evaluate their behavior over long time intervals.It was found that the statistical criterion (power-law spectrum of GRP distribution of energy and peak flux density) seems not to be strict for pulsars with a low magnetic field at their light cylinder.Moreover,spectra of some of these pulsars demonstrate unstable behavior with time and have a complex multicomponent shape.In the dataset for B0950+08,we have detected the strongest GRP from a pulsar with a low magnetic field at its light cylinder ever reported,having a peak flux density as strong as 16.8 kJy.