# A Search for High-Energy Counterparts to Fast Radio Bursts

## TL;DR

This study searches for high-energy counterparts to fast radio bursts using multiple space observatories, finds no significant associations, and sets upper limits that inform models of FRB origins.

## Contribution

It provides the first comprehensive upper limits on high-energy emissions associated with FRBs across multiple timescales and discusses implications for progenitor models.

## Key findings

- No significant high-energy counterparts detected.
- Upper limits constrain FRB progenitor models.
- Results inform future high-energy observational strategies.

## Abstract

We report on a search for high-energy counterparts to fast radio bursts (FRBs) with the Fermi Gamma-ray Burst Monitor (GBM), Fermi Large Area Telescope (LAT), and the Neil Gehrels Swift Observatory Burst Alert Telescope (BAT). We find no significant associations for any of the 23 FRBs in our sample, but report upper limits to the high-energy fluence for each on timescales of 0.1, 1, 10, and 100 s. We report lower limits on the ratio of the radio to high-energy fluence, $\frac{f_{r}}{f_{\gamma}}$, for timescales of 0.1 and 100 s. We discuss the implications of our non-detections on various proposed progenitor models for FRBs, including analogs of giant pulses from the Crab pulsar and hyperflares from magnetars. This work demonstrates the utility of analyses of high-energy data for FRBs in tracking down the nature of these elusive sources.