| DOI | Resolve DOI: https://doi.org/10.1093/mnras/staa3436 |
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| Author | Search for: Kumar, P.1ORCID identifier: https://orcid.org/0000-0003-1913-3092; Search for: Shannon, R. M.1, 2ORCID identifier: https://orcid.org/0000-0002-7285-6348; Search for: Flynn, C.ORCID identifier: https://orcid.org/0000-0003-1110-0712; Search for: Osłowski, S.ORCID identifier: https://orcid.org/0000-0003-0289-0732; Search for: Bhandari, S.ORCID identifier: https://orcid.org/0000-0003-3460-506X; Search for: Day, C. K.ORCID identifier: https://orcid.org/0000-0002-8101-3027; Search for: Deller, A. T.ORCID identifier: https://orcid.org/0000-0001-9434-3837; Search for: Farah, W.ORCID identifier: https://orcid.org/0000-0002-0161-7243; Search for: Kaczmarek, J. F.3ORCID identifier: https://orcid.org/0000-0003-4810-7803; Search for: Kerr, M.ORCID identifier: https://orcid.org/0000-0002-0893-4073; Search for: Phillips, C.ORCID identifier: https://orcid.org/0000-0002-5851-5264; Search for: Price, D. C.ORCID identifier: https://orcid.org/0000-0003-2783-1608; Search for: Qiu, H.ORCID identifier: https://orcid.org/0000-0002-9586-7904; Search for: Thyagarajan, N.ORCID identifier: https://orcid.org/0000-0003-1602-7868 |
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| Affiliation | - Centre for Astrophysics and Supercomputing, Swinburne University of Technology, P.O. Box 218, Hawthorn, VIC 3122, Australia
- ARC Centre of Excellence for Gravitational Wave Discovery (OzGrav), Australia
- National Research Council of Canada. Herzberg Astronomy and Astrophysics
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| Funder | Search for: Australian Research Council |
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| Format | Text, Article |
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| Subject | methods: data analysis; methods: observational; fast radio bursts |
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| Abstract | The fast radio burst (FRB) population is observationally divided into sources that have been observed to repeat and those that have not. There is tentative evidence that the bursts from repeating sources have different properties than the non-repeating ones. In order to determine the occurrence rate of repeating sources and characterize the nature of repeat emission, we have been conducting sensitive searches for repetitions from bursts detected with the Australian Square Kilometre Array Pathfinder (ASKAP) with the 64-m Parkes radio telescope, using the recently commissioned Ultra-wideband Low (UWL) receiver system, over a band spanning 0.7–4.0 GHz. We report the detection of a repeat burst from the source of FRB 20190711A. The detected burst is 1 ms wide and has a bandwidth of just 65 MHz. We find no evidence of any emission in the remaining part of the 3.3 GHz UWL band. While the emission bandwidths of the ASKAP and UWL bursts show ν⁻⁴ scaling consistent with a propagation effect, the spectral occupancy is inconsistent with diffractive scintillation. This detection rules out models predicting broad-band emission from the FRB 20190711A source and puts stringent constraints on the emission mechanism. The low spectral occupancy highlights the importance of sub-banded search methods in detecting FRBs. |
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| Publication date | 2020-11-25 |
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| Publisher | Oxford Academic |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 308f83a4-629b-442a-b2f3-d69d6876b08a |
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| Record created | 2023-01-16 |
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| Record modified | 2023-01-16 |
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