The First CHIME/FRB Fast Radio Burst Catalog

Author:

Amiri MandanaORCID,Andersen Bridget C.ORCID,Bandura KevinORCID,Berger SabrinaORCID,Bhardwaj MohitORCID,Boyce Michelle M.ORCID,Boyle P. J.ORCID,Brar CharanjotORCID,Breitman DanielaORCID,Cassanelli TomasORCID,Chawla PragyaORCID,Chen TianyueORCID,Cliche J.-F.ORCID,Cook AmandaORCID,Cubranic DavorORCID,Curtin Alice P.ORCID,Deng MeilingORCID,Dobbs MattORCID,(Adam) Dong FengqiuORCID,Eadie GwendolynORCID,Fandino MateusORCID,Fonseca EmmanuelORCID,Gaensler B. M.ORCID,Giri UtkarshORCID,Good Deborah C.ORCID,Halpern MarkORCID,Hill Alex S.ORCID,Hinshaw GaryORCID,Josephy AlexanderORCID,Kaczmarek Jane F.ORCID,Kader ZarifORCID,Kania Joseph W.ORCID,Kaspi Victoria M.ORCID,Landecker T. L.ORCID,Lang DustinORCID,Leung CalvinORCID,Li DongziORCID,Lin Hsiu-HsienORCID,Masui Kiyoshi W.ORCID,Mckinven RyanORCID,Mena-Parra JuanORCID,Merryfield MarcusORCID,Meyers Bradley W.ORCID,Michilli DanieleORCID,Milutinovic NikolaORCID,Mirhosseini ArashORCID,Münchmeyer MoritzORCID,Naidu ArunORCID,Newburgh LauraORCID,Ng CherryORCID,Patel ChitrangORCID,Pen Ue-LiORCID,Petroff EmilyORCID,Pinsonneault-Marotte TristanORCID,Pleunis ZiggyORCID,Rafiei-Ravandi MasoudORCID,Rahman MubdiORCID,Ransom Scott M.ORCID,Renard AndreORCID,Sanghavi PranavORCID,Scholz PaulORCID,Shaw J. RichardORCID,Shin KaitlynORCID,Siegel Seth R.ORCID,Sikora Andrew E.ORCID,Singh SaurabhORCID,Smith Kendrick M.ORCID,Stairs IngridORCID,Tan Chia MinORCID,Tendulkar S. P.ORCID,Vanderlinde KeithORCID,Wang HaochenORCID,Wulf DallasORCID,Zwaniga A. V.ORCID

Abstract

Abstract We present a catalog of 536 fast radio bursts (FRBs) detected by the Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst (CHIME/FRB) Project between 400 and 800 MHz from 2018 July 25 to 2019 July 1, including 62 bursts from 18 previously reported repeating sources. The catalog represents the first large sample, including bursts from repeaters and nonrepeaters, observed in a single survey with uniform selection effects. This facilitates comparative and absolute studies of the FRB population. We show that repeaters and apparent nonrepeaters have sky locations and dispersion measures (DMs) that are consistent with being drawn from the same distribution. However, bursts from repeating sources differ from apparent nonrepeaters in intrinsic temporal width and spectral bandwidth. Through injection of simulated events into our detection pipeline, we perform an absolute calibration of selection effects to account for systematic biases. We find evidence for a population of FRBs—composing a large fraction of the overall population—with a scattering time at 600 MHz in excess of 10 ms, of which only a small fraction are observed by CHIME/FRB. We infer a power-law index for the cumulative fluence distribution of α = 1.40 ± 0.11 ( stat. ) 0.09 + 0.06 ( sys. ) , consistent with the −3/2 expectation for a nonevolving population in Euclidean space. We find that α is steeper for high-DM events and shallower for low-DM events, which is what would be expected when DM is correlated with distance. We infer a sky rate of [ 820 ± 60 ( stat. ) 200 + 220 ( sys. ) ] / sky / day above a fluence of 5 Jy ms at 600 MHz, with a scattering time at 600 MHz under 10 ms and DM above 100 pc cm−3.

Funder

Canada Foundation for Innovation

Gouvernement du Canada ∣ Natural Sciences and Engineering Research Council of Canada

National Science Foundation

Canadian Institute for Advanced Research

Fonds de recherche du Québec – Nature et technologies

DOD ∣ National Defense Science and Engineering Graduate

Publisher

American Astronomical Society

Subject

Space and Planetary Science,Astronomy and Astrophysics

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