The Second CHIME/FRB Catalog of Fast Radio Bursts
Abstract
We present a catalog of 4539 fast radio bursts (FRBs) observed with the Canadian Hydrogen Intensity Mapping Experiment (CHIME) telescope between 25 July 2018 and 15 September 2023. These bursts originate from 3641 unique sources, including 981 bursts from 83 known repeating sources. For each FRB, the catalog provides a estimate of sky location along with corresponding measurements of cumulative exposure time and survey sensitivity over the observing period. It includes a total-intensity dynamic spectrum between 400 and 800 MHz at 0.983 ms resolution. From this spectrum, we constrain a model of the burst morphology and measure key parameters such as arrival time, intrinsic temporal width, dispersion measure, scattering time, and flux density. This second catalog includes all FRBs from the first catalog, with every event reprocessed using a uniform and improved analysis framework. We show that previously published inferences remain valid under the updated measurements. We assess consistency of the detection rate across observational parameters, present initial distributions of burst properties, and outline ongoing and future studies that will use this catalog to investigate the nature of FRBs and their utility as astrophysical and cosmological probes.
Cite
@article{arxiv.2601.09399,
title = {The Second CHIME/FRB Catalog of Fast Radio Bursts},
author = {FRB Collaboration and Thomas Abbott and Bridget C. Andersen and Shion Andrew and Kevin Bandura and Mohit Bhardwaj and Yash Bhusare and Charanjot Brar and Tomas Cassanelli and Shami Chatterjee and Jean-Francois Cliche and Amanda M. Cook and Alice Curtin and Matt Dobbs and Fengqiu Adam Dong and Gwendolyn Eadie and Tarraneh Eftekhari and Emmanuel Fonseca and B. M. Gaensler and Deborah Good and Mark Halpern and Jason W. T. Hessels and Adaeze Ibik and Naman Jain and Ronniy C. Joseph and Zarif Kader and Victoria M. Kaspi and Afrokk Khan and Bikash Kharel and Ajay Kumar and T. L. Landecker and Dustin Lang and Adam E. Lanman and Magnus L'Argent and Mattias Lazda and Calvin Leung and Dong Zi Li and Chris J. Lintott and Robert Main and Kiyoshi W. Masui and Sujay Mate and Kyle McGregor and Ryan Mckinven and Juan Mena-Parra and Bradley W. Meyers and Daniele Michilli and Cherry Ng and Mason Ng and Kenzie Nimmo and Gavin Noble and Ayush Pandhi and Swarali S. Patil and Aaron B. Pearlman and Ue-Li Pen and Ziggy Pleunis and J. Xavier Prochaska and Masoud Rafiei-Ravandi and Scott Ransom and Andre Renard and Mawson W. Sammons and Ketan R. Sand and Paul Scholz and Vishwangi Shah and Kaitlyn Shin and Seth R. Siegel and Sloane Sirota and Kendrick Smith and Ingrid Stairs and David C. Stenning and Shriharsh P. Tendulkar and Keith Vanderlinde and Mike Walmsley and Haochen Wang and Dallas Wulf},
journal= {arXiv preprint arXiv:2601.09399},
year = {2026}
}
Comments
36 pages, 15 figures, 4 tables. Extended figures and data at http://www.chime-frb.ca/catalog2