# Search for GeV counterparts to fast radio bursts with Fermi

## TL;DR

This study searched for GeV gamma-ray counterparts to non-repeating fast radio bursts using Fermi LAT but found no significant emissions, setting upper limits on possible energetic afterglows and discussing future observational prospects.

## Contribution

First comprehensive search for GeV counterparts to all non-repeating FRBs with Fermi LAT, establishing upper limits and constraining models of FRB-related high-energy emissions.

## Key findings

- No significant GeV emission detected from any FRB
- Set upper limits on GeV fluences and blast wave energies
- Future observations could better constrain FRB-GRB connection

## Abstract

The non-repeating fast radio bursts (FRBs) could arise from catastrophic stellar explosions or magnetar giant flares, so relativistic blast waves might be produced in these events. Motivated by this, we here search for GeV counterparts to all non-repeating FRBs with Fermi Large Area Telescope (LAT), including FRB 131104 that is claimed to be possibly associated with a gamma-ray transient candidate detected by Swift Burst Alert Telescope (BAT). FRB 131104 enters the field of view (FoV) of LAT ~5000s after the burst time, so we are only able to search for the GeV afterglow emission during this period, but no significant GeV emission is detected. We also perform a search for GeV emissions from other FRBs, but no significant GeV emissions are detected either. Upper limit fluences in the range of (4.7-29.2)x10^(-7) erg/cm2 are obtained, and then the upper limits of the isotropic blast wave kinetic energy of about (1-200)x10^(53) erg are inferred under certain assumptions. Although the current limits on the isotropic blast wave energy are not sufficiently stringent to rule out the connection between FRBs and GRB-like transients, future more sensitive observations with Fermi or Imaging Atmospheric Cherenkov Telescopes might be able to constrain the connection.