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dc.contributor.authorRowlinson, A.
dc.contributor.authorGourdji, K.
dc.contributor.authorMeulen, K. van der
dc.contributor.authorMeyers, Z. S.
dc.contributor.authorShimwell, T. W.
dc.contributor.authorVeen, S. ter
dc.contributor.authorWijers, R. A. M. J.
dc.contributor.authorKuiack, M. J.
dc.contributor.authorShulevski, A.
dc.contributor.authorBroderick, J. W.
dc.contributor.authorHorst, A. J. van der
dc.contributor.authorTasse, C.
dc.contributor.authorHardcastle, M. J.
dc.contributor.authorMechev, A. P.
dc.contributor.authorWilliams, W. L.
dc.date.accessioned2019-11-28T01:10:30Z
dc.date.available2019-11-28T01:10:30Z
dc.date.issued2019-10-21
dc.identifier.citationRowlinson , A , Gourdji , K , Meulen , K V D , Meyers , Z S , Shimwell , T W , Veen , S T , Wijers , R A M J , Kuiack , M J , Shulevski , A , Broderick , J W , Horst , A J V D , Tasse , C , Hardcastle , M J , Mechev , A P & Williams , W L 2019 , ' LOFAR early-time search for coherent radio emission from GRB 180706A ' , Monthly Notices of the Royal Astronomical Society , vol. 490 , no. 3 , pp. 3483–3492 . https://doi.org/10.1093/mnras/stz2866
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 17369296
dc.identifier.otherPURE UUID: 2a37d02d-3cd7-4bd8-bd4e-9af4db248fa6
dc.identifier.otherArXiv: http://arxiv.org/abs/1909.02958v1
dc.identifier.otherORCID: /0000-0001-7315-1596/work/65312418
dc.identifier.otherScopus: 85079600166
dc.identifier.urihttp://hdl.handle.net/2299/21941
dc.description© 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.
dc.description.abstractThe nature of the central engines of gamma-ray bursts (GRBs) and the composition of their relativistic jets are still under debate. If the jets are Poynting flux dominated rather than baryon dominated, a coherent radio flare from magnetic re-connection events might be expected with the prompt gamma-ray emission. There are two competing models for the central engines of GRBs; a black hole or a newly formed milli-second magnetar. If the central engine is a magnetar it is predicted to produce coherent radio emission as persistent or flaring activity. In this paper, we present the deepest limits to date for this emission following LOFAR rapid response observations of GRB 180706A. No emission is detected to a 3$\sigma$ limit of 1.7 mJy beam$^{-1}$ at 144 MHz in a two-hour LOFAR observation starting 4.5 minutes after the gamma-ray trigger. A forced source extraction at the position of GRB 180706A provides a marginally positive (1 sigma) peak flux density of $1.1 \pm 0.9$ mJy. The data were time-sliced into different sets of snapshot durations to search for FRB like emission. No short duration emission was detected at the location of the GRB. We compare these results to theoretical models and discuss the implications of a non-detection.en
dc.format.extent10
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.rightsOpen
dc.subjectastro-ph.HE
dc.titleLOFAR early-time search for coherent radio emission from GRB 180706Aen
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeFinal Accepted Version
dcterms.dateAccepted2019-10-21
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1093/mnras/stz2866
rioxxterms.licenseref.uriOther
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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