# A Southern sky search for repeating Fast Radio Bursts using the Australian SKA Pathfinder

## TL;DR

This study used ASKAP to search the southern sky for repeating Fast Radio Bursts, detecting one FRB but finding no repeaters, thus constraining the local universe volume where such repeaters could exist.

## Contribution

First large-area survey with ASKAP targeting repeating FRBs in the southern sky, setting constraints on nearby repeating FRB populations.

## Key findings

- Detected one FRB (FRB 180515)
- No repeating FRBs found in 158 antenna days
- Excluded nearby repeating FRBs similar to FRB 121102 within z=0.004

## Abstract

We have conducted a search for bright repeating Fast Radio Bursts in our nearby Universe with the Australian Square Kilometer Array Pathfinder (ASKAP) in single-dish mode. We used eight ASKAP 12-m dishes, each equipped with a Chequerboard Phased Array Feed forming 36 beams on the sky, to survey $\sim$30,000 deg$^{2}$ of the southern sky ($-90^{\circ} < \delta < +30^{\circ}$) in 158 antenna days. The fluence limit of the survey is 22 Jyms. We report the detection of FRB 180515 in our survey. We found no repeating FRBs in a total mean observation of 3hrs per pointing divided into one-hour intervals, which were separated in time ranging between a day to a month. Using our non-detection, we exclude the presence of a repeating FRB similar to FRB 121102 closer than $z=0.004$ in the survey area --- a volume of at least $9.4 \times 10^4$Mpc$^3$ --- at 95% confidence.