Observations of giant pulses from B1237+25 (J1239+2453) at 111 MHz. Detection and classification
- Authors: Kazantsev A.N.1,2, Potapov V.A.2
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Affiliations:
- Pushchino State Natural Sciences Institute
- Pushchino Radio Astronomy Observatory, Astro Space Center
- Issue: Vol 61, No 9 (2017)
- Pages: 747-759
- Section: Article
- URL: https://journals.rcsi.science/1063-7729/article/view/191004
- DOI: https://doi.org/10.1134/S1063772917080054
- ID: 191004
Cite item
Abstract
An analysis of data from monitoring of individual pulses of the second-period pulsar PSR B1237+25 (J1239+2453) carried out on the Large Phased Array (LPA) of the Pushchino Radio Astronomy Observatory at 111 MHz during 2012–2015 is presented. The aim of this observing program is a search for anomalously strong and giant pulses. The regular generation of powerful individual pulses at the longitudes of three of five components in the main profile of PSR B1237+25 has been detected. The distribution of these strong pulses in flux density is bimodal, and has the power-law form characteristic for giant pulses, with power-law indices n = −1.26 ± 0.05 and −3.36 ± 0.34, which differentiates them from the regular pulses of pulsars, having a log–normal distribution. The characteristic pulse widths at the half-intensity level are 3–5 ms, which comprises 50–100% of the width of the corresponding component in the mean profile. The most powerful of the detected pulses had a peak flux density of 900 ± 160 Jy, and the strongest pulse exceeded the session-mean profile by a factor of 65.
About the authors
A. N. Kazantsev
Pushchino State Natural Sciences Institute; Pushchino Radio Astronomy Observatory, Astro Space Center
Author for correspondence.
Email: kaz.prao@bk.ru
Russian Federation, Pushchino; Pushchino
V. A. Potapov
Pushchino Radio Astronomy Observatory, Astro Space Center
Email: kaz.prao@bk.ru
Russian Federation, Pushchino
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