Detection of Fast Radio Bursts on the Large Scanning Antenna of the Lebedev Physical Institute

TL;DR

This study reports the detection of three fast radio bursts (FRBs) at 111 MHz using the Lebedev Physical Institute's Large Scanning Antenna over nearly six years, contributing valuable low-frequency FRB data.

Contribution

It presents a long-term search for FRBs at 111 MHz, identifying three new bursts and demonstrating the effectiveness of their detection method at low radio frequencies.

Findings

Detected three FRBs with dispersion measures of 247, 570, and 1767 pc·cm^-3.

Analyzed 355 hours of observational data per beam.

Confirmed the presence of FRBs at low radio frequencies.

Abstract

Results of a search for individual impulsive signals on the Large Scanning Antenna of the Lebedev Physical Institute at 111 MHz carried out from July 2012 through May 2018 are presented. The data were convolved with a template of a specified form and convolved with a test dispersion measure. A region of sky with central coordinates $\alpha = 05^h 32^m;$ $\delta = +41.72^\circ$ and also a region of sky around the coordinates fixed earlier for FRB 121102 ($\alpha = 05^h 32^m;$ $\delta = +33.1^\circ$) were chosen for the analysis. In all, 355 hours of observations were processed for each beam. Three radio bursts with dispersion measures of $247$ $pc \cdot cm^{-3}$, $570$ $ pc \cdot cm^{-3}$, $1767$ $ pc \cdot cm^{-3}$ were detected in the course of reducing the data.