Discovery of 30 Repeating Fast Radio Burst Sources and Uniform Population Statistics of 80 Repeating Sources from CHIME/FRB
Amanda M. Cook (1, 2, and 3), Kaitlyn Shin (4), Ziggy Pleunis (3, 5), Maxwell Fine (1, 2), Naman Jain (1, 2), Derek Bingham (6), Alice P. Curtin (1, 2, and 3), Gwendolyn Eadie (7, 8, and 9), B. M. Gaensler (10, 11, and 7), Jason W. T. Hessels (1, 2, 3, and 5), Calvin Leung (12

TL;DR
This paper reports the discovery of 30 new repeating fast radio burst sources by CHIME/FRB, analyzes their properties, and finds that the population of repeaters and non-repeaters may be similar in their burst rate distributions.
Contribution
The study presents 30 new repeating FRB sources, expands the total to 80, and provides a population analysis suggesting similar burst rate distributions for repeaters and non-repeaters.
Findings
30 new repeating FRB sources discovered by CHIME/FRB.
Evidence of linear DM variations in four repeaters over years.
No significant difference in burst rate distributions between repeaters and non-repeaters.
Abstract
We present 30 newly discovered repeating fast radio burst (FRB) sources from the second catalog of bursts detected by the FRB backend on the Canadian Hydrogen Intensity Mapping Experiment (CHIME/FRB). These repeaters have extragalactic dispersion measures (DMs) spanning and burst rates between and hr scaled to a fluence threshold of 5 Jy ms. We report evidence of monotonic, linear DM variations in four repeaters on years-long timescales. The newly discovered sources bring CHIME/FRB's total number of observed repeating FRBs to 80, 79 of which were discovered by CHIME/FRB, between 2018 July 25 and 2023 September 15. In the full CHIME/FRB sample, only 2.4 of sources have been observed to repeat, and we do not find evidence for significant evolution of this value over the duration of the experiment. We find no…
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