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Updating the first CHIME/FRB catalog of fast radio bursts with baseband data

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arxiv 2311.00111 v2 pith:JHZBF2PF submitted 2023-10-31 astro-ph.HE

The CHIME/FRB Collaboration: Mandana Amiri , Bridget C. Andersen , Shion Andrew , Kevin Bandura , Mohit Bhardwaj , P. J. Boyle , Charanjot Brar , Daniela Breitman
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Tomas Cassanelli Pragya Chawla Amanda M. Cook Alice P. Curtin Matt Dobbs Fengqiu Adam Dong Gwendolyn Eadie Emmanuel Fonseca B. M. Gaensler Utkarsh Giri Antonio Herrera-Martin Hans Hopkins Adaeze L. Ibik Ronniy C. Joseph J. F. Kaczmarek Zarif Kader Victoria M. Kaspi Adam E. Lanman Mattias Lazda Calvin Leung Siqi Liu Kiyoshi W. Masui Ryan Mckinven Juan Mena-Parra Marcus Merryfield Daniele Michilli Cherry Ng Kenzie Nimmo Gavin Noble Ayush Pandhi Chitrang Patel Aaron B. Pearlman Ue-Li Pen Emily Petroff Ziggy Pleunis Masoud Rafiei-Ravandi Mubdi Rahman Scott M. Ransom Ketan R. Sand Paul Scholz Vishwangi Shah Kaitlyn Shin Yuliya Shpunarska Seth R. Siegel Kendrick Smith Ingrid Stairs David C. Stenning Keith Vanderlinde Haochen Wang Henry White Dallas Wulf
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In 2021, a catalog of 536 fast radio bursts (FRBs) detected with the Canadian Hydrogen Intensity Mapping Experiment (CHIME) radio telescope was released by the CHIME/FRB Collaboration. This large collection of bursts, observed with a single instrument and uniform selection effects, has advanced our understanding of the FRB population. Here we update the results for 140 of these FRBs for which channelized raw voltage ('baseband') data are available. With the voltages measured by the telescope's antennas, it is possible to maximize the telescope sensitivity in any direction within the primary beam, an operation called 'beamforming'. This allows us to increase the signal-to-noise ratio (S/N) of the bursts and to localize them to sub-arcminute precision. The improved localization is also used to correct the beam response of the instrument and to measure fluxes and fluences with a ~10% uncertainty. Additionally, the time resolution is increased by three orders of magnitude relative to that in the first CHIME/FRB catalog, and, applying coherent dedispersion, burst morphologies can be studied in detail. Polarization information is also available for the full sample of 140 FRBs, providing an unprecedented dataset to study the polarization properties of the population. We release the baseband data beamformed to the most probable position of each FRB. These data are analyzed in detail in a series of accompanying papers.

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Forward citations

Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Characterising the response of an International LOFAR Station

    astro-ph.IM 2026-07 conditional novelty 6.0 of 10

    International LOFAR stations are 20–45% more sensitive to sources on the rising side of the sky than the setting side, an asymmetry observed in all 11 tracked pulsars and across three stations.

  2. Fast Radio Bursts Trace Cosmic Star Formation with Little Delay

    astro-ph.HE 2026-07 conditional novelty 6.0 of 10

    Hierarchical Bayesian analysis of CHIME/FRB finds the FRB volumetric rate peaks with the cosmic star-formation history at mean delays of 0.1–0.3 Gyr, consistent with zero delay and ruling out multi-Gyr merger-like delays.

  3. Searching for Gamma Ray Bursts associated with CHIME Fast Radio bursts

    astro-ph.HE 2026-04 unverdicted novelty 6.0 of 10

    Using CHIME localization maps plus redshift and time constraints, no statistically significant FRB–GRB association survives.

  4. The Cosmic Evolution of Fast Radio Bursts Inferred from the CHIME/FRB Baseband Catalog 1

    astro-ph.HE 2025-01 conditional novelty 6.0 of 10

    CHIME/FRB baseband data imply an FRB energy slope near -2 and a mixed source population with about 2 Gyr delays, plus telescope specs for detecting reionization-era FRBs.

  5. Semi-supervised morphological classification of fast radio bursts from the second CHIME/FRB catalogue

    astro-ph.HE 2026-07 conditional novelty 5.0 of 10

    A simulation-trained convolutional autoencoder identifies three distinct FRB morphological classes and classifies repeatability with 86% recall.

  6. Fast Radio Bursts and the radio perspective on multi-messenger gravitational lensing

    astro-ph.HE 2024-12 unverdicted

    This review lays out how gravitationally lensed fast radio bursts could be identified and used to measure the Hubble constant and the compact-object content of dark matter.

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