Hunting the gamma-ray emission from Fast Radio Burst with Fermi-LAT

TL;DR

This study uses over 12 years of Fermi-LAT data to search for gamma-ray emissions from Fast Radio Bursts, aiming to identify potential GeV counterparts and understand their high-energy properties.

Contribution

It is the first to perform a stacking analysis of gamma-ray data for FRBs, providing new constraints on their gamma-ray emission characteristics.

Findings

No gamma-ray counterparts detected for individual FRBs.

Stacking analysis constrains gamma-ray emission levels from FRBs.

Results inform models predicting gamma-ray emission from FRBs.

Abstract

Fast radio bursts (FRBs) are one of the most exciting new mysteries of astrophysics. Their origin is still unknown, but recent observations seem to link them to soft gamma repeaters and, in particular, to magnetar giant flares (MGFs). The recent detection of a MGF at GeV energies by the Fermi Large Area Telescope (LAT) motivated the search for GeV counterparts to the >100 currently known FRBs. To date, none of these has a known gamma-ray counterpart. Taking advantage of more than 12 years of Fermi-LAT data, we perform a search for gamma-ray emission from almost all the reported repeating and non-repeating FRBs. We analyze on different time scales the Fermi-LAT data for each individual source separately and perform a cumulative analysis on the repeating ones. In addition, we perform the first stacking analysis at GeV energies of this class of sources in order to constrain the gamma-ray properties of the FRBs. The stacking analysis is a powerful method that allows for a possible detection from below-threshold FRBs providing important information on these objects. In this proceeding we present preliminary results of our study and we discuss their implications for the predictions of gamma-ray emission from this class of sources.