Which bright fast radio bursts repeat?

James, C. W.; Osłowski, S.; Flynn, Chris; Kumar, P.; Bannister, K. W.; Bhandari, Shivani; Farah, W.; Kerr, M.; Lorimer, D. R.; Macquart, Jean–Pierre; Ng, Cherry; Phillips, Chris; Price, Danny C.; Qiu, Hao; Shannon, R. M.; Spiewak, R.

doi:10.1093/mnras/staa1361

Cited by 44 publications

(28 citation statements)

References 54 publications

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“…Wang et al, 2016). Indeed, the volumetric rate of bright FRBs -only two of which have been observed to repeat despite significant follow-up observations (Kumar et al, 2019(Kumar et al, , 2020James et al, 2020) -is remarkably consistent with that of the SGRB population (James et al, 2019c).…”

Section: Introductionmentioning

confidence: 52%

Murchison Widefield Array rapid-response observations of the short GRB 180805A

Anderson,

Hancock,

Rowlinson

et al. 2021

Preprint

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Here we present stringent low-frequency (185 MHz) limits on coherent radio emission associated with a short-duration gamma-ray burst (SGRB). Our observations of the short gamma-ray burst (GRB) 180805A were taken with the upgraded Murchison Widefield Array (MWA) rapid-response system, which triggered within 20 s of receiving the transient alert from the Swift Burst Alert Telescope, corresponding to 83.7 s post-burst. The SGRB was observed for a total of 30 min, resulting in a 3σ persistent flux density upper-limit of 40.2 mJy beam −1 . Transient searches were conducted at the Swift position of this GRB on 0.5 s, 5 s, 30 s and 2 min timescales, resulting in 3σ limits of 570 − 1830, 270 − 630, 200 − 420, and 100 − 200 mJy beam −1 , respectively. We also performed a dedispersion search for prompt signals at the position of the SGRB with a temporal and spectral resolution of 0.5 s and 1.28 MHz, respectively, resulting in a 6σ fluence upper-limit range from 570 Jy ms at DM= 3000 pc cm −3 (z ∼ 2.5) to 1750 Jy ms at DM= 200 pc cm −3 (z ∼ 0.1), corresponding to the known redshift range of SGRBs. We compare the fluence prompt emission limit and the persistent upper-limit to SGRB coherent emission models assuming the merger resulted in a stable magnetar remnant. Our observations were not sensitive enough to detect prompt emission associated with the alignment of magnetic fields of a binary neutron star just prior to the merger, from the interaction between the relativistic jet and the interstellar medium (ISM) or persistent pulsar-like emission from the spin-down of the magnetar. However, in the case of a more powerful SGRB (a gamma-ray fluence an order of magnitude higher than GRB 180805A and/or a brighter X-ray counterpart), our MWA observations may be sensitive enough to detect coherent radio emission from the jet-ISM interaction and/or the magnetar remnant. Finally, we demonstrate that of all current low frequency radio telescopes, only the MWA has the sensitivity and response times capable of probing prompt emission models associated with the initial SGRB merger event.

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Section: Introductionmentioning

confidence: 52%

Murchison Widefield Array rapid-response observations of the short GRB 180805A

Anderson,

Hancock,

Rowlinson

et al. 2021

Preprint

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“…These were each localised from a single burst detection, and have not been found to repeat despite extensive follow-up in the same fields (James et al 2020). Although it is possible that one or more of them emit repeat bursts, we note that all 3 had pulse widths somewhat smaller than found in the known repeaters (The CHIME/FRB Collaboration 2019b), as well as differing in their time-frequency structure and polarization properties (Day et al, in prep.…”

Section: Introductionmentioning

confidence: 73%

A search for supernova-like optical counterparts to ASKAP-localised fast radio bursts

Marnoch

Ryder

Bannister

et al. 2020

A&A

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Fast radio bursts (FRBs) are millisecond-scale radio pulses, which originate in distant galaxies and are produced by unknown sources. The mystery remains partially because of the typical difficulty in localising FRBs to host galaxies. Accurate localisations delivered by the Commensal Real-time ASKAP Fast Transients (CRAFT) survey now provide an opportunity to study the host galaxies and potential transient counterparts of FRBs at a large range of wavelengths. In this work, we investigate whether the first three FRBs accurately localised by CRAFT have supernova-like transient counterparts. We obtained two sets of imaging epochs with the Very Large Telescope for three host galaxies, one soon after the burst detection and one several months later. After subtracting these images no optical counterparts were identified in the associated FRB host galaxies, so we instead place limits on the brightness of any potential optical transients. A Monte Carlo approach, in which supernova light curves were modelled and their base properties randomised, was used to estimate the probability of a supernova associated with each FRB going undetected. We conclude that Type Ia and IIn supernovae are unlikely to accompany every apparently non-repeating FRB.

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“…Of the ∼600 published FRBs 3 , ∼24 FRBs have been seen to repeat so far [56,57], suggesting that at least a subset have progenitors that can survive the energetic events causing them, e.g., [49]. It is presently unclear whether all FRBs repeat, and if repeating and apparently non-repeating FRBs form a unified population [58][59][60]. In addition to providing real-time, wide field-of-view instruments, the software and instrumentation developments have also resulted in the discovery of remarkable temporal structure on the microsecond level in pulses where high-time resolution data were available [61,62].…”

Section: A Primer Of Frb Science From 2007-2020mentioning

confidence: 99%

A Decade and a Half of Fast Radio Burst Observations

Caleb

Keane

2021

Universe

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Fast radio bursts (FRBs) have a story which has been told and retold many times over the past few years as they have sparked excitement and controversy since their pioneering discovery in 2007. The FRB class encompasses a number of microsecond- to millisecond-duration pulses occurring at Galactic to cosmological distances with energies spanning about 8 orders of magnitude. While most FRBs have been observed as singular events, a small fraction of them have been observed to repeat over various timescales leading to an apparent dichotomy in the population. ∼50 unique progenitor theories have been proposed, but no consensus has emerged for their origin(s). However, with the discovery of an FRB-like pulse from the Galactic magnetar SGR J1935+2154, magnetar engine models are the current leading theory. Overall, FRB pulses exhibit unique characteristics allowing us to probe line-of-sight magnetic field strengths, inhomogeneities in the intergalactic/interstellar media, and plasma turbulence through an assortment of extragalactic and cosmological propagation effects. Consequently, they are formidable tools to study the Universe. This review follows the progress of the field between 2007 and 2020 and presents the science highlights of the radio observations.

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Which bright fast radio bursts repeat?

Cited by 44 publications

References 54 publications

Murchison Widefield Array rapid-response observations of the short GRB 180805A

Murchison Widefield Array rapid-response observations of the short GRB 180805A

A search for supernova-like optical counterparts to ASKAP-localised fast radio bursts

A Decade and a Half of Fast Radio Burst Observations

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