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dc.contributor.authorRhodes, L.
dc.contributor.authorHorst, A.J.V.D.
dc.contributor.authorFender, R.
dc.contributor.authorMonageng, I.M.
dc.contributor.authorAnderson, Gemma
dc.contributor.authorAntoniadis, J.
dc.contributor.authorBietenholz, M.F.
dc.contributor.authorBöttcher, M.
dc.contributor.authorBright, J.S.
dc.contributor.authorGreen, D.A.
dc.contributor.authorKouveliotou, C.
dc.contributor.authorKramer, M.
dc.contributor.authorMotta, S.E.
dc.contributor.authorWijers, R.A.M.J.
dc.contributor.authorWilliams, D.R.A.
dc.contributor.authorWoudt, P.A.
dc.date.accessioned2023-02-02T06:28:27Z
dc.date.available2023-02-02T06:28:27Z
dc.date.issued2020
dc.identifier.citationRhodes, L. and Horst, A.J.V.D. and Fender, R. and Monageng, I.M. and Anderson, G.E. and Antoniadis, J. and Bietenholz, M.F. et al. 2020. Radio afterglows of very high-energy gamma-ray bursts 190829A and 180720B. Monthly Notices of the Royal Astronomical Society. 496 (3): pp. 3326-3335.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/90303
dc.identifier.doi10.1093/MNRAS/STAA1715
dc.description.abstract

We present high-cadence multifrequency radio observations of the long gamma-ray burst (GRB) 190829A, which was detected at photon energies above 100 GeV by the High Energy Stereoscopic System (H.E.S.S.). Observations with the Meer Karoo Array Telescope (MeerKAT, 1.3 GHz) and ArcminuteMicrokelvin Imager-Large Array (AMI-LA, 15.5 GHz) began one day post-burst and lasted nearly 200 d. We used complementary data from Swift X-Ray Telescope (XRT), which ran to 100 d post-burst. We detected a likely forward shock component with bothMeerKAT and XRT up to over 100 d post-burst. Conversely, the AMI-LA light curve appears to be dominated by reverse shock emission until around 70 d post-burst when the afterglow flux drops below the level of the host galaxy. We also present previously unpublished observations of the other H.E.S.S.-detected GRB, GRB 180720B from AMILA, which shows likely forward shock emission that fades in less than 10 d. We present a comparison between the radio emission from the three GRBs with detected very high energy (VHE) gamma-ray emission and a sensitivity-limited radio afterglow sample. GRB 190829A has the lowest isotropic radio luminosity of any GRB in our sample, but the distribution of luminosities is otherwise consistent, as expected, with the VHE GRBs being drawn from the same parent distribution as the other radio-detected long GRBs.

dc.languageEnglish
dc.publisherOXFORD UNIV PRESS
dc.relation.sponsoredbyhttp://purl.org/au-research/grants/arc/DE180100346
dc.subjectScience & Technology
dc.subjectPhysical Sciences
dc.subjectAstronomy & Astrophysics
dc.subjectradio continuum: transients
dc.subjectgamma-ray burst: individual: GRB 180720B
dc.subjectgamma-ray burst: individual: GRB 190829A
dc.subjectLIGHT CURVES
dc.subjectGRB 970508
dc.subjectIMAGER
dc.subjectDEEP
dc.subjectGHZ
dc.titleRadio afterglows of very high-energy gamma-ray bursts 190829A and 180720B
dc.typeJournal Article
dcterms.source.volume496
dcterms.source.number3
dcterms.source.startPage3326
dcterms.source.endPage3335
dcterms.source.issn0035-8711
dcterms.source.titleMonthly Notices of the Royal Astronomical Society
dc.date.updated2023-02-02T06:28:27Z
curtin.note

This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2020 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

curtin.departmentSchool of Elec Eng, Comp and Math Sci (EECMS)
curtin.accessStatusOpen access
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidAnderson, Gemma [0000-0001-6544-8007]
dcterms.source.eissn1365-2966
curtin.contributor.scopusauthoridAnderson, Gemma [10045028200]


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