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dc.contributor.authorBroderick, J. W.
dc.contributor.authorShimwell, T. W.
dc.contributor.authorGourdji, K.
dc.contributor.authorRowlinson, A.
dc.contributor.authorNissanke, S.
dc.contributor.authorHotokezaka, K.
dc.contributor.authorJonker, P. G.
dc.contributor.authorTasse, C.
dc.contributor.authorHardcastle, M. J.
dc.contributor.authorOonk, J. B. R.
dc.contributor.authorFender, R. P.
dc.contributor.authorWijers, R. A. M. J.
dc.contributor.authorShulevski, A.
dc.contributor.authorStewart, A. J.
dc.contributor.authorVeen, S. ter
dc.contributor.authorMoss, V. A.
dc.contributor.authorWiel, M. H. D. van der
dc.contributor.authorNichols, D. A.
dc.contributor.authorPiette, A.
dc.contributor.authorCarbone, D.
dc.contributor.authorCorbel, S.
dc.contributor.authorEislöffel, J.
dc.contributor.authorGrießmeier, J. -M.
dc.contributor.authorKeane, E. F.
dc.contributor.authorLaw, C. J.
dc.contributor.authorMuñoz-Darias, T.
dc.contributor.authorPietka, M.
dc.contributor.authorSerylak, M.
dc.contributor.authorHorst, A. J. van der
dc.contributor.authorLeeuwen, J. van
dc.contributor.authorWijnands, R.
dc.contributor.authorZarka, P.
dc.contributor.authorAnderson, J. M.
dc.contributor.authorBentum, M. J.
dc.contributor.authorBlaauw, R.
dc.contributor.authorBrouw, W. N.
dc.contributor.authorBrüggen, M.
dc.contributor.authorCiardi, B.
dc.contributor.authorVos, M. de
dc.contributor.authorDuscha, S.
dc.contributor.authorFallows, R. A.
dc.contributor.authorFranzen, T. M. O.
dc.contributor.authorGarrett, M. A.
dc.contributor.authorGunst, A. W.
dc.contributor.authorHoeft, M.
dc.contributor.authorHörandel, J. R.
dc.contributor.authorIacobelli, M.
dc.contributor.authorJütte, E.
dc.contributor.authorKoopmans, L. V. E.
dc.contributor.authorKrankowski, A.
dc.contributor.authorMaat, P.
dc.contributor.authorMann, G.
dc.contributor.authorMulder, H.
dc.contributor.authorNelles, A.
dc.contributor.authorPaas, H.
dc.contributor.authorPandey-Pommier, M.
dc.contributor.authorPekal, R.
dc.contributor.authorReich, W.
dc.contributor.authorRöttgering, H. J. A.
dc.contributor.authorSchwarz, D. J.
dc.contributor.authorSmirnov, O.
dc.contributor.authorSoida, M.
dc.contributor.authorToribio, M. C.
dc.contributor.authorHaarlem, M. P. van
dc.contributor.authorWeeren, R. J. van
dc.contributor.authorVocks, C.
dc.contributor.authorWucknitz, O.
dc.contributor.authorZucca, P.
dc.date.accessioned2020-08-05T00:09:17Z
dc.date.available2020-08-05T00:09:17Z
dc.date.issued2020-06-01
dc.identifier.citationBroderick , J W , Shimwell , T W , Gourdji , K , Rowlinson , A , Nissanke , S , Hotokezaka , K , Jonker , P G , Tasse , C , Hardcastle , M J , Oonk , J B R , Fender , R P , Wijers , R A M J , Shulevski , A , Stewart , A J , Veen , S T , Moss , V A , Wiel , M H D V D , Nichols , D A , Piette , A , Carbone , D , Corbel , S , Eislöffel , J , Grießmeier , J -M , Keane , E F , Law , C J , Muñoz-Darias , T , Pietka , M , Serylak , M , Horst , A J V D , Leeuwen , J V , Wijnands , R , Zarka , P , Anderson , J M , Bentum , M J , Blaauw , R , Brouw , W N , Brüggen , M , Ciardi , B , Vos , M D , Duscha , S , Fallows , R A , Franzen , T M O , Garrett , M A , Gunst , A W , Hoeft , M , Hörandel , J R , Iacobelli , M , Jütte , E , Koopmans , L V E , Krankowski , A , Maat , P , Mann , G , Mulder , H , Nelles , A , Paas , H , Pandey-Pommier , M , Pekal , R , Reich , W , Röttgering , H J A , Schwarz , D J , Smirnov , O , Soida , M , Toribio , M C , Haarlem , M P V , Weeren , R J V , Vocks , C , Wucknitz , O & Zucca , P 2020 , ' LOFAR 144-MHz follow-up observations of GW170817 ' , Monthly Notices of the Royal Astronomical Society , vol. 494 , no. 4 , staa950 , pp. 5110–5117 . https://doi.org/10.1093/mnras/staa950
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 20706531
dc.identifier.otherPURE UUID: a6f7c624-e34e-4af5-ba83-58ae2961b54a
dc.identifier.otherArXiv: http://arxiv.org/abs/2004.01726v1
dc.identifier.urihttp://hdl.handle.net/2299/23036
dc.descriptionThis article has been accepted for publication in Monthly Notices of the Royal Astronomical Society, Volume 494, Issue 4, June 2020, Pages 5110–5117, ©: 2020 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
dc.description.abstractWe present low-radio-frequency follow-up observations of AT 2017gfo, the electromagnetic counterpart of GW170817, which was the first binary neutron star merger to be detected by Advanced LIGO-Virgo. These data, with a central frequency of 144 MHz, were obtained with LOFAR, the Low-Frequency Array. The maximum elevation of the target is just 13.7 degrees when observed with LOFAR, making our observations particularly challenging to calibrate and significantly limiting the achievable sensitivity. On time-scales of 130-138 and 371-374 days after the merger event, we obtain 3$\sigma$ upper limits for the afterglow component of 6.6 and 19.5 mJy beam$^{-1}$, respectively. Using our best upper limit and previously published, contemporaneous higher-frequency radio data, we place a limit on any potential steepening of the radio spectrum between 610 and 144 MHz: the two-point spectral index $\alpha^{610}_{144} \gtrsim -2.5$. We also show that LOFAR can detect the afterglows of future binary neutron star merger events occurring at more favourable elevations.en
dc.format.extent8
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.subjectastro-ph.HE
dc.titleLOFAR 144-MHz follow-up observations of GW170817en
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
rioxxterms.versionAM
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.1093/mnras/staa950
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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