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dc.contributor.authorShimwell, T.W.
dc.contributor.authorTasse, C.
dc.contributor.authorHardcastle, M.J.
dc.contributor.authorMechev, A.P.
dc.contributor.authorWilliams, W.L.
dc.contributor.authorBest, P.N.
dc.contributor.authorRöttgering, H.J.A.
dc.contributor.authorCallingham, J.R.
dc.contributor.authorDijkema, T.J.
dc.contributor.authorDe Gasperin, F.
dc.contributor.authorHoang, D.N.
dc.contributor.authorHugo, B.
dc.contributor.authorMirmont, M.
dc.contributor.authorOonk, J.B.R.
dc.contributor.authorPrandoni, I.
dc.contributor.authorRafferty, D.
dc.contributor.authorSabater, J.
dc.contributor.authorSmirnov, O.
dc.contributor.authorVan Weeren, R.J.
dc.contributor.authorWhite, G.J.
dc.contributor.authorAtemkeng, M.
dc.contributor.authorBester, L.
dc.contributor.authorBonnassieux, E.
dc.contributor.authorBrüggen, M.
dc.contributor.authorBrunetti, G.
dc.contributor.authorChy, K.T.
dc.contributor.authorCochrane, R.
dc.contributor.authorConway, J.E.
dc.contributor.authorCroston, J.H.
dc.contributor.authorDanezi, A.
dc.contributor.authorDuncan, K.
dc.contributor.authorHaverkorn, M.
dc.contributor.authorHeald, G.H.
dc.contributor.authorIacobelli, M.
dc.contributor.authorIntema, Huib
dc.contributor.authorJackson, N.
dc.contributor.authorJamrozy, M.
dc.contributor.authorJarvis, M.J.
dc.contributor.authorLakhoo, R.
dc.contributor.authorMevius, M.
dc.contributor.authorMiley, G.K.
dc.contributor.authorMorabito, L.
dc.contributor.authorMorganti, R.
dc.contributor.authorNisbet, D.
dc.contributor.authorOrrú, E.
dc.contributor.authorPerkins, S.
dc.contributor.authorPizzo, R.F.
dc.contributor.authorSchrijvers, C.
dc.contributor.authorSmith, D.J.B.
dc.contributor.authorVermeulen, R.
dc.contributor.authorWise, M.W.
dc.contributor.authorAlegre, L.
dc.contributor.authorBacon, D.J.
dc.contributor.authorVan Bemmel, I.M.
dc.contributor.authorBeswick, R.J.
dc.contributor.authorBonafede, A.
dc.contributor.authorBotteon, A.
dc.contributor.authorBourke, S.
dc.contributor.authorBrienza, M.
dc.contributor.authorCalistro Rivera, G.
dc.contributor.authorCassano, R.
dc.contributor.authorClarke, A.O.
dc.contributor.authorConselice, C.J.
dc.contributor.authorDettmar, R.J.
dc.contributor.authorDrabent, A.
dc.contributor.authorDumba, C.
dc.contributor.authorEmig, K.L.
dc.contributor.authorEnßlin, T.A.
dc.contributor.authorFerrari, C.
dc.contributor.authorGarrett, M.A.
dc.contributor.authorGénova-Santos, R.T.
dc.contributor.authorGoyal, A.
dc.contributor.authorGürkan, G.
dc.contributor.authorHale, C.
dc.contributor.authorHarwood, J.J.
dc.contributor.authorHeesen, V.
dc.contributor.authorHoeft, M.
dc.contributor.authorHorellou, C.
dc.contributor.authorJackson, Carole
dc.contributor.authorKokotanekov, G.
dc.contributor.authorKondapally, R.
dc.contributor.authorKunert-Bajraszewska, M.
dc.contributor.authorMahatma, V.
dc.contributor.authorMahony, E.K.
dc.contributor.authorMandal, S.
dc.contributor.authorMcKean, J.P.
dc.contributor.authorMerloni, A.
dc.contributor.authorMingo, B.
dc.contributor.authorMiskolczi, A.
dc.contributor.authorMooney, S.
dc.contributor.authorNikiel-Wroczyński, B.
dc.contributor.authorO'Sullivan, S.P.
dc.contributor.authorQuinn, J.
dc.contributor.authorReich, W.
dc.contributor.authorRoskowiński, C.
dc.contributor.authorRowlinson, A.
dc.contributor.authorSavini, F.
dc.contributor.authorSaxena, A.
dc.contributor.authorSchwarz, D.J.
dc.contributor.authorShulevski, A.
dc.date.accessioned2019-07-22T01:51:18Z
dc.date.available2019-07-22T01:51:18Z
dc.date.issued2019
dc.identifier.citationShimwell, T.W. and Tasse, C. and Hardcastle, M.J. and Mechev, A.P. and Williams, W.L. and Best, P.N. and Röttgering, H.J.A. et al. 2019. The LOFAR Two-metre Sky Survey: II. First data release. Astronomy and Astrophysics. 622: ARTN A1.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/76023
dc.identifier.doi10.1051/0004-6361/201833559
dc.description.abstract

The LOFAR Two-metre Sky Survey (LoTSS) is an ongoing sensitive, high-resolution 120-168 MHz survey of the entire northern sky for which observations are now 20% complete. We present our first full-quality public data release. For this data release 424 square degrees, or 2% of the eventual coverage, in the region of the HETDEX Spring Field (right ascension 10h45m00s to 15h30m00s and declination 45°00′00″ to 57°00′00″) were mapped using a fully automated direction-dependent calibration and imaging pipeline that we developed. A total of 325 694 sources are detected with a signal of at least five times the noise, and the source density is a factor of ∼10 higher than the most sensitive existing very wide-area radio-continuum surveys. The median sensitivity is S144 MHz = 71 μJy beam -1 and the point-source completeness is 90% at an integrated flux density of 0.45 mJy. The resolution of the images is 6″ and the positional accuracy is within 0.2″. This data release consists of a catalogue containing location, flux, and shape estimates together with 58 mosaic images that cover the catalogued area. In this paper we provide an overview of the data release with a focus on the processing of the LOFAR data and the characteristics of the resulting images. In two accompanying papers we provide the radio source associations and deblending and, where possible, the optical identifications of the radio sources together with the photometric redshifts and properties of the host galaxies. These data release papers are published together with a further ∼20 articles that highlight the scientific potential of LoTSS.

dc.languageEnglish
dc.publisherEDP SCIENCES S A
dc.subjectScience & Technology
dc.subjectPhysical Sciences
dc.subjectAstronomy & Astrophysics
dc.subjectsurveys
dc.subjectcatalogs
dc.subjectradio continuum: general
dc.subjecttechniques: image processing
dc.subjectUNDERSTANDING RADIO POLARIMETRY
dc.subjectFLUX-DENSITY SCALE
dc.subjectCLUSTER ENVIRONMENTS
dc.subjectIMAGING SURVEY
dc.subjectSOUTHERN SKY
dc.subjectGALAXY
dc.subjectCALIBRATION
dc.subjectDISCOVERY
dc.subjectEMISSION
dc.subjectAGN
dc.titleThe LOFAR Two-metre Sky Survey: II. First data release
dc.typeJournal Article
dcterms.source.volume622
dcterms.source.issn0004-6361
dcterms.source.titleAstronomy and Astrophysics
dc.date.updated2019-07-22T01:51:18Z
curtin.note

Reproduced with permission from Astronomy & Astrophysics, © ESO

curtin.departmentSchool of Elec Eng, Comp and Math Sci (EECMS)
curtin.accessStatusOpen access
curtin.contributor.orcidIntema, Huib [0000-0002-5880-2730]
curtin.contributor.researcheridIntema, Huib [D-1438-2012]
curtin.identifier.article-numberARTN A1
dcterms.source.eissn1432-0746
curtin.contributor.scopusauthoridIntema, Huib [55958431900] [8549469700]
curtin.contributor.scopusauthoridJackson, Carole [35795630300]


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