A Search for Coincident Neutrino Emission from Fast Radio Bursts with Seven Years of IceCube Cascade Events

TL;DR

This study searches for neutrinos coinciding with 23 FRBs using seven years of IceCube cascade data, finding no significant signals but setting upper limits on neutrino emission.

Contribution

It introduces the first search for FRB-associated neutrinos using IceCube cascade events over an extended period, complementing previous track-based analyses.

Findings

No significant neutrino-FRB coincidences detected.

Upper limits established on neutrino flux from FRBs.

Extended timescale analysis enhances sensitivity.

Abstract

This paper presents the results of a search for neutrinos that are spatially and temporally coincident with 22 unique, non-repeating Fast Radio Bursts (FRBs) and one repeating FRB (FRB121102). FRBs are a rapidly growing class of Galactic and extragalactic astrophysical objects that are considered a potential source of high-energy neutrinos. The IceCube Neutrino Observatory's previous FRB analyses have solely used track events. This search utilizes seven years of IceCube's cascade events which are statistically independent of the track events. This event selection allows probing of a longer range of extended timescales due to the low background rate. No statistically significant clustering of neutrinos was observed. Upper limits are set on the time-integrated neutrino flux emitted by FRBs for a range of extended time-windows.