# A single fast radio burst localized to a massive galaxy at cosmological distance

## TL;DR

This paper reports the precise localization of a non-repeating fast radio burst to a specific galaxy, providing insights into the burst's origin and the intergalactic medium.

## Contribution

It presents the first interferometric localization of a single, non-repeating FRB to a host galaxy, enabling detailed study of its environment and cosmic web.

## Key findings

- FRB 180924 is localized to a galaxy at redshift 0.3214
- The burst's properties differ from other localized FRBs
- The line-of-sight electron density matches intergalactic medium models

## Abstract

Fast Radio Bursts (FRBs) are brief radio emissions from distant astronomical sources. Some are known to repeat, but most are single bursts. Non-repeating FRB observations have had insufficient positional accuracy to localize them to an individual host galaxy. We report the interferometric localization of the single pulse FRB 180924 to a position 4 kpc from the center of a luminous galaxy at redshift 0.3214. The burst has not been observed to repeat. The properties of the burst and its host are markedly different from the only other accurately localized FRB source. The integrated electron column density along the line of sight closely matches models of the intergalactic medium, indicating that some FRBs are clean probes of the baryonic component of the cosmic web.