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 , \nicefrac { { 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 .