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

TL;DR

This study searches for gamma-ray emission from Fast Radio Bursts using over 12 years of Fermi-LAT data, employing individual, cumulative, and stacking analyses to detect potential GeV counterparts and constrain their high-energy properties.

Contribution

It is the first to perform a stacking analysis of FRBs at GeV energies, providing new constraints on gamma-ray emission from these sources.

Findings

No significant gamma-ray emission detected from individual FRBs.

Stacking analysis constrains gamma-ray emission from undetected FRBs.

Results inform models of FRB high-energy emission.

Abstract

Fast radio bursts (FRBs) are one of the most exciting new mysteries of astrophysics. Their origin is still unknown, but recent observations seems 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 \textit{Fermi} Large Area Telescope (LAT) motivated the search for GeV counterparts to the >100 currently known FRBs. Taking advantage of more than 12 years of \textit{Fermi}-LAT data, we perform a search for gamma-ray emission from all the reported repeating and non-repeating FRBs. We analyse on different-time scales the \textit{Fermi}-LAT data of each individual source separately, including 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 that are undetected at high energies. The stacking analysis is a powerful method that allow a possible detection from below-threshold FRBs providing important information on these objects. In this talk we present the preliminary results of our study and we discuss their implications for the predictions of gamma-ray emission from this class of sources