Detection of Two New RRATs at 111 MHz

At the LPA LPI radio telescope, a search was conducted for pulse signals in a specific area with declinations . 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 revea...

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Bibliographic Details
Published in:Astronomy reports 2023-06, Vol.67 (6), p.590-595
Main Authors: Samodurov, V. A., Tyul’bashev, S. A., Toropov, M. O., Dolgushev, A. V., Oreshko, V. V., Logvinenko, S. V.
Format: Article
Language:English
Subjects:
Astronomy
Channels
Emission analysis
Observations and Techniques
Physics
Physics and Astronomy
Pulsars
Radio telescopes
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Summary:At the LPA LPI radio telescope, a search was conducted for pulse signals in a specific area with declinations . 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%.
ISSN:1063-7729
1562-6881
DOI:10.1134/S1063772923070077