Nine New Repeating Fast Radio Burst Sources from CHIME/FRB

A. Josephy; A. Naidu; A. V. Zwaniga; B. C. Andersen; B. M. Gaensler; C. Brar; C. Leung; C. Ng; C. Patel; D. C. Good

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Nine New Repeating Fast Radio Burst Sources from CHIME/FRB

E. Fonseca, B. C. Andersen, M. Bhardwaj, P. Chawla, D. C. Good, A. Josephy, V. M. Kaspi, K. W. Masui

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High Energy Astrophysical Phenomena · Submitted 10 Jan 2020

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim However, as previously reported, the burst widths appear statistically significantly larger than the thus far non-repeating CHIME/FRB events, further supporting the notion of inherently different emission mechanisms and/or local environments.

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arXiv ID2001.03595 (version 2)

Pith ID6A6KKNYA, Pith's permanent record of this paper and its review

CitationA. Josephy, A. Naidu, A. V. Zwaniga, B. C. Andersen, B. M. Gaensler, C. Brar, C. Leung, C. Ng, C. Patel, D. C. Good, D. Cubranic, D. Michilli, D. Z. Li, E. Fonseca, F. Q. Dong, G. Hinshaw, H.-H. Lin, I. H. Stairs, J. Mena-Parra, K. M. Bandura, K. M. Smith, K. Shin, K. Vanderlinde, K. W. Masui, M. Bhardwaj, M. Dobbs, M. Merryfield, M. Rafiei-Ravandi, M. Rahman, P. Chawla, P. J. Boyle, P. Scholz, P. Yadav, R. Mckinven, S. M. Ransom, S. P. Tendulkar, T. Cassanelli, T. L. Landecker, U. Pen, V. M. Kaspi, Z. Pleunis. "Nine New Repeating Fast Radio Burst Sources from CHIME/FRB." arXiv:2001.03595 (2020). https://pith.science/paper/6A6KKNYA

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We report on the discovery and analysis of bursts from nine new repeating fast radio burst (FRB) sources found using the Canadian Hydrogen Intensity Mapping Experiment (CHIME) telescope. These sources span a dispersion measure (DM) range of 195 to 1380 pc cm$^{-3}$. We detect two bursts from three of the new sources, three bursts from four of the new sources, four bursts from one new source, and five bursts from one new source. We determine sky coordinates of all sources with uncertainties of $\sim$10$^\prime$. We detect Faraday rotation measures for two sources, with values $-20(1)$ and $-499.8(7)$ rad m$^{-2}$, that are substantially lower than the RM derived from bursts emitted by FRB 121102. We find that the DM distribution of our events, combined with the nine other repeaters discovered by CHIME/FRB, is indistinguishable from that of thus far non-repeating CHIME/FRB events. However, as previously reported, the burst widths appear statistically significantly larger than the thus far non-repeating CHIME/FRB events, further supporting the notion of inherently different emission mechanisms and/or local environments. These results are consistent with previous work, though are now derived from 18 repeating sources discovered by CHIME/FRB during its first year of operation. We identify candidate galaxies that may contain FRB 190303.J1353+48 (DM = 222.4 pc cm$^{-3}$).

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#	sentence	role	the authors' own work	states the main conclusion	strength
s0	We report on the discovery and analysis of bursts from nine new repeating fast radio burst (FRB) sources found using the Canadian Hydrogen Intensity Mapping Experiment (CHIME) telescope.	contribution 0.98	0.97	0.53	asserted 1.00
s1	These sources span a dispersion measure (DM) range of 195 to 1380 pc cm$^{-3}$.	result 1.00	0.84	0.04	asserted 1.00
s2	We detect two bursts from three of the new sources, three bursts from four of the new sources, four bursts from one new source, and five bursts from one new source.	result 0.99	0.97	0.05	asserted 1.00
s3	We determine sky coordinates of all sources with uncertainties of $\sim$10$^\prime$.	result 0.96	0.97	0.04	asserted 1.00
s4	We detect Faraday rotation measures for two sources, with values $-20(1)$ and $-499.8(7)$ rad m$^{-2}$, that are substantially lower than the RM derived from bursts emitted by FRB 121102.	result 1.00	0.97	0.07	asserted 1.00
s5	We find that the DM distribution of our events, combined with the nine other repeaters discovered by CHIME/FRB, is indistinguishable from that of thus far non-repeating CHIME/FRB events.	result 0.95	0.91	0.22	asserted 1.00
s6	However, as previously reported, the burst widths appear statistically significantly larger than the thus far non-repeating CHIME/FRB events, further supporting the notion of inherently different emission mechanisms and/or local environments.	interpretation 0.69	0.65	0.21	asserted 0.88
s7	These results are consistent with previous work, though are now derived from 18 repeating sources discovered by CHIME/FRB during its first year of operation.	interpretation 0.68	0.79	0.17	hedged possibility 0.85
s8	We identify candidate galaxies that may contain FRB 190303.J1353+48 (DM = 222.4 pc cm$^{-3}$).	result 0.90	0.94	0.05	hedged possibility 0.94

What kind of paper the classifier reports this is: empirical study 1.00 · evidence from observation or experiment 0.98.

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The paper

Original abstract

We report on the discovery and analysis of bursts from nine new repeating fast radio burst (FRB) sources found using the Canadian Hydrogen Intensity Mapping Experiment (CHIME) telescope. These sources span a dispersion measure (DM) range of 195 to 1380 pc cm$^{-3}$. We detect two bursts from three of the new sources, three bursts from four of the new sources, four bursts from one new source, and five bursts from one new source. We determine sky coordinates of all sources with uncertainties of $\sim$10$^\prime$. We detect Faraday rotation measures for two sources, with values $-20(1)$ and $-499.8(7)$ rad m$^{-2}$, that are substantially lower than the RM derived from bursts emitted by FRB 121102. We find that the DM distribution of our events, combined with the nine other repeaters discovered by CHIME/FRB, is indistinguishable from that of thus far non-repeating CHIME/FRB events. However, as previously reported, the burst widths appear statistically significantly larger than the thus far non-repeating CHIME/FRB events, further supporting the notion of inherently different emission mechanisms and/or local environments. These results are consistent with previous work, though are now derived from 18 repeating sources discovered by CHIME/FRB during its first year of operation. We identify candidate galaxies that may contain FRB 190303.J1353+48 (DM = 222.4 pc cm$^{-3}$).

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References

Forward citations

Cited by 5 Pith papers

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

A bright millisecond-duration radio burst from a Galactic magnetar
astro-ph.HE 2020-05 accept novelty 8.0 of 10

A bright millisecond radio burst from the Galactic magnetar SGR 1935+2154 reaches energies within one to two orders of magnitude of fast radio bursts, directly linking magnetars to at least some FRBs.
FRB 20210601A: Extreme Temporal Clustering in a Repeating Fast Radio Burst Source as Evidence for a Hidden Class of Episodic Repeaters
astro-ph.HE 2026-10 conditional novelty 6.0 of 10

FRB 20210601A fired nine bursts in 106.5 seconds and none in roughly 320 hours of later monitoring, evidence that some repeating fast radio bursts are episodic storm emitters rather than steady repeaters.
Searching for Gravitational Waves with Strongly Lensed Repeating Fast Radio Bursts
astro-ph.CO 2020-09 conditional novelty 6.0 of 10

Strongly lensed repeating fast radio bursts could act as cosmological clocks whose image-arrival time delays are shifted by passing long-wavelength gravitational waves, enabling a new search channel especially for sou...
A Bayesian Framework for Constraining Magnetar Magnetic Fields from Repeating FRB Statistics
astro-ph.HE 2026-08 conditional novelty 5.0 of 10

Bayesian inference from burst waiting times and energies constrains magnetar magnetic fields in repeating FRBs to 10^13-10^15 G, with FRB 20200120E requiring a weaker field.
Rotation Measure Evolution of the Repeating Fast Radio Burst Source FRB 121102
astro-ph.HE 2020-09 conditional novelty 5.0 of 10

The rotation measure of repeating fast radio burst FRB 121102 fell by about 34 percent over 2.6 years with week-scale jumps, and the decline is best matched by young magnetar-nebula models rather than a uniform supern...

How later papers used it

154 later papers cite it

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1 later paper by other authors is listed below: 1 used its data or values. 1 more paper by the same authors is listed: 1 used its data or values.

Uses its data or values 2 of 22 papers with this label · 1 by the same authors

Retrieved and analyzed previously published data for two other sources discovered by the CHIME/FRB Collaboration, namely FRB 20180916B and FRB 20180814A.

Evidence of a shared spectro-temporal law between sources of repeating fast radio bursts (2020) · 0.87 · paraphrased: the licence does not allow quoting

By the same authors

For known repeating bursts, and , we have used measured width parameters and scattering parameters reported in [ref] and [ref] ; for the potential repeaters, we have used the measured parameters from [ref] .

Non-detection of CHIME/FRB sources with the Arecibo Observatory (2022) (same authors) · Understanding Sensitivity Limits · 1.00

How the literature uses it

29 arXiv papers cite this in 44 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

Papers citing it · 28 sentences without a confident label

Uses its method or tool 1 paper

The off-pulse per-channel RMS values are used as weights for the polarization analysis [ref] .

A bright millisecond-duration radio burst from a Galactic magnetar · Algonquin Park 10-m Radio Telescope Observations · 1.00

Uses its data or values 4 papers

We collect the data of repeating FRBs from the observation of CHIME [ref] , which is the largest sample of repeating FRBs observed by the same telescope.

The rarity of repeating fast radio bursts from binary neutron star mergers · Method · 0.97
The current CHIME/FRB dataset [ref] reports the DM as well as the excess DM of FRBs, which we use to estimate the redshifts of these FRBs.

Gravitational Lensing in Modified Gravity: A case study for Fast Radio Bursts · Effect of modified gravity in lensing of fast radio bursts · 0.99
Note that 18 of the 30 FRBs observed by CHIME we considered here are repeaters [ref] .

Joint inference on the redshift distribution of fast radio burst and on the intergalactic baryon content · Discussion · 0.94

Compares with it 1 paper

The $∼$1-ms measured durations of the subcomponents are typical of the widths of bursts from the 18 CHIME-discovered repeating FRB sources [ref] .

A bright millisecond-duration radio burst from a Galactic magnetar · Introduction · 0.91

Cites it as support 2 papers

This is supported by the detection of 18 more repeaters by the Canadian Hydrogen Intensity Mapping Experiment [ref] .

Implications of CHIME repeating fast radio bursts · Introduction · 0.96
The detection of repeating FRB sources [ref] , the deficiency of likely cataclysmic progenitors such as neutron star mergers [ref] in supplying the occurrence rate of the FRBs per unit volume [ref] and population studies [ref] suggest FRBs are non-catastrophic events.

Stimulated-emission based model of fast radio bursts · Introduction · 0.98

Cites it as background 5 papers

Up to now, above 100 FRBs have been discovered [ref] , see [ref] for a catalog of published FRBs [http://frbcat.org/]. 20 of them show repeating behaviors, including FRB 121102 [ref] , FRB 180814.J0422+73 [ref] , FRB 171019 [ref] , and 17 FRBs recently discovered by the Canadian Hydrogen Intensity Mapping Experiment [ref] .

Persistent Radio Emission from Synchrotron Heating by a Repeating Fast Radio Burst Source in a Nebula · Introduction · 0.86
Fast radio bursts (FRBs) are extragalactic radio transients with millisecond durations, large dispersion measures (DMs) and extremely high brightness temperatures [ref] .

Are persistent emission luminosity and rotation measure of fast radio bursts related? · Introduction · 1.00
Some FRBs have also been observed to repeat; the first discovered, and most observed so far, is [ref] , and more repeating FRBs have been detected by the Canadian Hydrogen Intensity Mapping Experiment (CHIME) radio telescope [ref] and the Australian Square Kilometre Array Pathfinder [ref] .

Rotation Measure Evolution of the Repeating Fast Radio Burst Source FRB 121102 · introduction · 0.96

What it cites · 4 sentences without a confident label

Uses the method or tool of 1 paper

In order to characterise the inter-day sensitivity variation of the CHIME/FRB system, we used the method described in [ref] .

CHIME/FRB Detection of the Original Repeating Fast Radio Burst Source FRB 121102 · Fluence Completeness Determination · 1.00

Compares with 1 paper

This approach is in contrast to the method used in [ref] , which combined measurements from pulsars detected on the same UTC day.

CHIME/FRB Detection of the Original Repeating Fast Radio Burst Source FRB 121102 · Fluence Completeness Determination · 0.94

Cites as background 3 papers

Recently proposed models typically include young, highly magnetised neutron stars that likely interact with their environments, such as supernova remnants [ref] or massive black holes [ref] , or bursting due to internal magnetar instabilities affecting the magnetosphere [ref] .

Fast radio bursts as synchrotron maser emission from decelerating relativistic blast waves · Introduction · 0.88
Recently proposed models typically include young, highly magnetised neutron stars that likely interact with their environments, such as supernova remnants [ref] or massive black holes [ref] , or bursting due to internal magnetar instabilities affecting the magnetosphere [ref] .

Radius-to-frequency mapping and FRB frequency drifts · Introduction · 0.88
Such extreme characteristics have resulted in a diverse and evolving landscape of physical models that differ in progenitor and emission-mechanism types, with possible interpretations ranging from compact objects to cosmic strings [ref] .

A Living Theory Catalogue for Fast Radio Bursts · Introduction · 0.99

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