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dc.contributor.authorWilliams, W. L.
dc.contributor.authorHardcastle, M. J.
dc.contributor.authorBest, P. N.
dc.contributor.authorSabater, J.
dc.contributor.authorCroston, J. H.
dc.contributor.authorDuncan, K. J.
dc.contributor.authorShimwell, T. W.
dc.contributor.authorRöttgering, H. J. A.
dc.contributor.authorNisbet, D.
dc.contributor.authorGürkan, G.
dc.contributor.authorAlegre, L.
dc.contributor.authorCochrane, R. K.
dc.contributor.authorGoyal, A.
dc.contributor.authorHale, C. L.
dc.contributor.authorJackson, N.
dc.contributor.authorJamrozy, M.
dc.contributor.authorKondapally, R.
dc.contributor.authorKunert-Bajraszewska, M.
dc.contributor.authorMahatma, V. H.
dc.contributor.authorMingo, B.
dc.contributor.authorMorabito, L. K.
dc.contributor.authorPrandoni, I.
dc.contributor.authorRoskowinski, C.
dc.contributor.authorShulevski, A.
dc.contributor.authorSmith, D. J. B.
dc.contributor.authorTasse, C.
dc.contributor.authorUrquhart, S.
dc.contributor.authorWebster, B.
dc.contributor.authorWhite, G. J.
dc.contributor.authorBeswick, R. J.
dc.contributor.authorCallingham, J. R.
dc.contributor.authorChyży, K. T.
dc.contributor.authorGasperin, F. de
dc.contributor.authorHarwood, J. J.
dc.contributor.authorHoeft, M.
dc.contributor.authorIacobelli, M.
dc.contributor.authorMcKean, J. P.
dc.contributor.authorMechev, A. P.
dc.contributor.authorMiley, G. K.
dc.contributor.authorSchwarz, D. J.
dc.contributor.authorWeeren, R. J. van
dc.date.accessioned2019-01-10T14:45:14Z
dc.date.available2019-01-10T14:45:14Z
dc.date.issued2018-11-09
dc.identifier.citationWilliams , W L , Hardcastle , M J , Best , P N , Sabater , J , Croston , J H , Duncan , K J , Shimwell , T W , Röttgering , H J A , Nisbet , D , Gürkan , G , Alegre , L , Cochrane , R K , Goyal , A , Hale , C L , Jackson , N , Jamrozy , M , Kondapally , R , Kunert-Bajraszewska , M , Mahatma , V H , Mingo , B , Morabito , L K , Prandoni , I , Roskowinski , C , Shulevski , A , Smith , D J B , Tasse , C , Urquhart , S , Webster , B , White , G J , Beswick , R J , Callingham , J R , Chyży , K T , Gasperin , F D , Harwood , J J , Hoeft , M , Iacobelli , M , McKean , J P , Mechev , A P , Miley , G K , Schwarz , D J & Weeren , R J V 2018 , ' The LOFAR Two-metre Sky Survey (LoTSS) III. First Data Release: optical/IR identifications and value-added catalogue ' , Astronomy & Astrophysics , pp. 1-23 . https://doi.org/10.1051/0004-6361/201833564
dc.identifier.issn0004-6361
dc.identifier.otherPURE: 15704564
dc.identifier.otherPURE UUID: a7e83a63-449e-4d62-9d44-5bfa940c0877
dc.identifier.otherArXiv: http://arxiv.org/abs/1811.07927v1
dc.identifier.otherScopus: 85062046128
dc.identifier.urihttp://hdl.handle.net/2299/20954
dc.description8 figures, 5 tables and 23 pages. This paper is part of the LOFAR surveys data release 1 and has been accepted for publication in a special edition of A&A that will appear in Feb 2019, volume 622. The catalogues and images from the data release will be publicly available at https://lofar-surveys.org/ upon publication in the journal. Reproduced with permission from Astronomy & Astrophysics. © 2019 ESO.
dc.description.abstractThe LOFAR Two-metre Sky Survey (LoTSS) is an ongoing sensitive, high-resolution 120-168 MHz survey of the Northern sky with diverse and ambitious science goals. Many of the scientific objectives of LoTSS rely upon, or are enhanced by, the association or separation of the sometimes incorrectly catalogued radio components into distinct radio sources, and the identification and characterisation of the optical counterparts to these sources. Here we present the source associations and optical and/or IR identifications for sources in the first data release, which are made using a combination of statistical techniques and visual association and identification. We document in detail the colour- and magnitude-dependent likelihood ratio method used for statistical identification as well as the Zooniverse project, called LOFAR Galaxy Zoo, used for the visual classification. We describe the process used to select which of these two different methods is most appropriate for each LoTSS source. The final LoTSS-DR1-IDs value-added catalogue presented contains 318,520 radio sources, of which 231,716 (73%) have optical and/or IR identifications in Pan-STARRS and WISE. The value-added catalogue is available online at https://lofar-surveys.org/, as part of this data release.en
dc.format.extent23
dc.language.isoeng
dc.relation.ispartofAstronomy & Astrophysics
dc.rightsOpen
dc.subjectastro-ph.GA
dc.subjectastro-ph.CO
dc.subjectastro-ph.HE
dc.titleThe LOFAR Two-metre Sky Survey (LoTSS) III. First Data Release: optical/IR identifications and value-added catalogueen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeFinal Accepted Version
dcterms.dateAccepted2018-11-09
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1051/0004-6361/201833564
rioxxterms.licenseref.uriOther
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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