# The detection of an extremely bright fast radio burst in a phased array feed survey

## TL;DR

This paper reports the discovery of an ultra-bright fast radio burst using the Australian Square Kilometre Array Pathfinder, demonstrating the effectiveness of wide-field phased-array-feed surveys in detecting bright FRBs.

## Contribution

It presents the first detection of an ultra-bright FRB with a wide-field phased-array-feed survey, highlighting the survey's capability to find bright FRBs efficiently.

## Key findings

- Detected an ultra-bright FRB with 58 Jy ms fluence.
- Constrained the FRB's position to an 8'x8' region.
- Observed a spectral cutoff above 1400 MHz.

## Abstract

We report the detection of an ultra-bright fast radio burst (FRB) from a modest, 3.4-day pilot survey with the Australian Square Kilometre Array Pathfinder. The survey was conducted in a wide-field fly's-eye configuration using the phased-array-feed technology deployed on the array to instantaneously observe an effective area of $160$ deg$^2$, and achieve an exposure totaling $13200$ deg$^2$ hr. We constrain the position of FRB 170107 to a region $8'\times8'$ in size (90% containment) and its fluence to be $58\pm6$ Jy ms. The spectrum of the burst shows a sharp cutoff above $1400$ MHz, which could be either due to scintillation or an intrinsic feature of the burst. This confirms the existence of an ultra-bright ($>20$ Jy ms) population of FRBs.