Detection of two new RRATs at 111 MHz

TL;DR

This study reports the discovery of two new rotating radio transients (RRATs) at 111 MHz, identified through a detailed analysis of ten months of radio telescope data, expanding knowledge of transient radio sources.

Contribution

The paper presents the first detection of two new RRATs at 111 MHz, using a novel multi-channel search method and analysis of nulling behavior, contributing to pulsar and transient radio source research.

Findings

Discovered two new RRATs at 111 MHz

RRATs likely represent pulsars with high nulling fractions

No periodic signals detected from the transients

Abstract

A search for pulse signals in a area with declinations of $+52\degr <\delta <+55\degr$ was carried out on the LPA LPI radio telescope. When processing ten months of observations recorded in six frequency channels with a channel width of 415 kHz and a total bandwidth of 2.5 MHz, 22 thousand events were found with a pronounced dispersion delay of signals over frequency channels, i.e. having signs of pulsar pulses. It turned out that the found pulses belong to four known pulsars and two new rotating radio transients (RRATs). An additional pulse search conducted in 32-channel data with a channel width of 78 kHz revealed 8 pulses for the transient J0249+52 and 7 pulses for the transient J0744+55. Periodic radiation of transients was not detected. The analysis of observations shows that the found RRATs are most likely pulsars with nullings, where the proportion of nulling is greater than 99.9\%.