Detection of Two New RRATs at 111 MHz

V. A. Samodurov; Самодуров В. А.; S. A. Tyul’bashev; Тюльбашев С. А.; M. O. Toropov; Торопов М. О.; A. V. Dolgushev; Долгушев А. В.; V. V. Oreshko; Орешко В. В.; S. V. Logvinenko; Логвиненко С. В.

doi:10.31857/S0004629923070071

Detection of Two New RRATs at 111 MHz

Authors: Samodurov V.A.¹^,2, Tyul’bashev S.A.², Toropov M.O.³, Dolgushev A.V.⁴, Oreshko V.V.², Logvinenko S.V.²
Affiliations:
1. National Research University Higher School of Economics
2. Lebedev Physical Institute, Astro Space Center, Pushchino Radio Astronomical Observatory
3. TEK Inform
4. Yandex
Issue: Vol 100, No 6 (2023)
Pages: 517-523
Section: Articles
URL: https://ruspoj.com/0004-6299/article/view/647528
DOI: https://doi.org/10.31857/S0004629923070071
EDN: https://elibrary.ru/MDAIQC
ID: 647528

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Abstract

At the LPA LPI radio telescope, a search was conducted for pulse signals in a specific area with declinations +52°<δ<+55°. The processing involved ten months of observations recorded in six frequency channels, each with a channel width of 415 kHz and a total bandwidth of 2.5 MHz. The analysis of the data revealed 22 000 events, exhibiting a pronounced dispersion delay of signals over the frequency channels, which are indicative of pulsar pulses. These pulses were found to belong to four known pulsars and two new rotating radio transients (RRAT). Additional pulse search was carried out in 32-channel data with a channel width of 78 kHz. This led to the discovery of 8 pulses for the transient J0249+52 and 7 pulses for the transient J0744+55. No periodic emission of transients was detected. The analysis of the observations indicates a high probability that the identified RRATs are pulsars with nullings, where the fraction of nullings is greater than 99.9%.

Keywords

processing methods, rotating radio transient (RRAT), pulsar

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