Title:	The Second CHIME/FRB Catalog of Fast Radio Bursts
Authors:	The CHIME/FRB Collaboration Abbott, Thomas Andersen, Bridget C Andrew, Shion Bandura, Kevin Bhardwaj, Mohit Bhusare, Yash Brar, Charanjot Cassanelli, Tomas Chatterjee, Shami Cliche, Jean-Francois Cook, Amanda M Curtin, Alice Dobbs, Matt Dong, Fengqiu Adam Eadie, Gwendolyn Eftekhari, Tarraneh Fonseca, Emmanuel Gaensler, B M Good, Deborah Halpern, Mark Hessels, Jason W T Ibik, Adaeze Jain, Naman Joseph, Ronniy C Kader, Zarif Kaspi, Victoria M Khan, Afrokk Kharel, Bikash Kumar, Ajay Landecker, T L Lang, Dustin Lanman, Adam E L’Argent, Magnus Lazda, Mattias Leung, Calvin Li, Dong Zi Lintott, Chris J Main, Robert Masui, Kiyoshi W Mate, Sujay McGregor, Kyle Mckinven, Ryan Mena-Parra, Juan Meyers, Bradley W Michilli, Daniele Ng, Cherry Ng, Mason Nimmo, Kenzie Noble, Gavin Pandhi, Ayush Patil, Swarali S Pearlman, Aaron B Pen, Ue-Li Pleunis, Ziggy Prochaska, J Xavier Rafiei-Ravandi, Masoud Ransom, Scott Renard, Andre Sammons, Mawson W Sand, Ketan R Scholz, Paul Shah, Vishwangi Shin, Kaitlyn Siegel, Seth R Sirota, Sloane Smith, Kendrick Stairs, Ingrid Stenning, David C Tendulkar, Shriharsh P Vanderlinde, Keith Walmsley, Mike Wang, Haochen Wulf, Dallas
Issue Date:	2-Mar-2026
Publisher:	American Astronomical Society
Citation:	The Astrophysical Journal Supplement Series, 2026, Vol. 283 (1), AR No. 34
Abstract:	We present a catalog of 4539 fast radio bursts (FRBs) observed with the Canadian Hydrogen Intensity Mapping Experiment telescope between 2018 July 25 and 2023 September 15. These bursts originate from 3641 unique sources, including 981 bursts from 83 known repeating sources. For each FRB, the catalog provides an O(10') 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.
Description:	Open Access. Also available at arXiv.org (one of the alternative locations)
URI:	http://hdl.handle.net/2289/8689
ISSN:	1538-4357
Alternative Location:	https://ui.adsabs.harvard.edu/abs/2025AAS...24631703S/abstract https://doi.org/10.48550/arXiv.2601.09399 http://doi.org/10.3847/1538-4365/ae3828
Copyright:	© 2026 The Author(s)
Appears in Collections:	Research Papers (A&A)

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