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- Shimwell, T. W.Netherlands Institute for Radio Astronomy (ASTRON) (author)
The LOFAR Two-metre Sky Survey: II. First data release
- Article/chapterEnglish2019
Publisher, publication year, extent ...
- 2019-02-19
- EDP Sciences,2019
- electronicrdacarrier
Numbers
- LIBRIS-ID:oai:research.chalmers.se:59964866-f885-42b1-80ab-e49f6aa20ed7
- https://research.chalmers.se/publication/520666URI
- https://doi.org/10.1051/0004-6361/201833559DOI
Supplementary language notes
- Language:English
- Summary in:English
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- SwePubSwePub
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Notes
- 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.
Subject headings and genre
- NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
- NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
- Radio continuum: general
- Catalogs
- Techniques: image processing
- Surveys
Added entries (persons, corporate bodies, meetings, titles ...)
- Tasse, C.Observatoire de Paris-Meudon (author)
- Hardcastle, M. J.University of Hertfordshire (author)
- Mechev, A. P.Universiteit Leiden (UL),Leiden University (UL) (author)
- Williams, W. L.University of Hertfordshire (author)
- Best, P.N.Royal Observatory (author)
- Rottgering, H.Universiteit Leiden (UL),Leiden University (UL) (author)
- Callingham, J. R.Netherlands Institute for Radio Astronomy (ASTRON) (author)
- Dijkema, T. J.Netherlands Institute for Radio Astronomy (ASTRON) (author)
- De Gasperin, F.Universiteit Leiden (UL),Leiden University (UL) (author)
- Hoang, D. N.Universiteit Leiden (UL),Leiden University (UL) (author)
- Hugo, B.Rhodes University (author)
- Mirmont, M. (author)
- Oonk, J. B. R.Netherlands Institute for Radio Astronomy (ASTRON) (author)
- Prandoni, I.Istituto di Radioastronomia (author)
- Rafferty, D.Universität Hamburg,University of Hamburg (author)
- Sabater, J.Royal Observatory (author)
- Smirnov, O.Rhodes University (author)
- van Weeren, R.Universiteit Leiden (UL),Leiden University (UL) (author)
- White, G.Open University (author)
- Atemkeng, M.Rhodes University (author)
- Bester, L.Rhodes University (author)
- Bonnassieux, E. (author)
- Brueggen, M.Universität Hamburg,University of Hamburg (author)
- Brunetti, G.Istituto di Radioastronomia (author)
- Chy, K. T.Jagiellonian University in Kraków, Poland (author)
- Cochrane, R.Royal Observatory (author)
- Conway, John,1963Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)jconway (author)
- Croston, J. H.Open University (author)
- Danezi, A.Surfsara Bv (author)
- Duncan, K.Universiteit Leiden (UL),Leiden University (UL) (author)
- Haverkorn, M.Radboud Universiteit,Radboud University (author)
- Heald, G.Commonwealth Scientific and Industrial Research Organisation (CSIRO) (author)
- Iacobelli, M.Netherlands Institute for Radio Astronomy (ASTRON) (author)
- Intema, H. T.Universiteit Leiden (UL),Leiden University (UL) (author)
- Jackson, N.University of Manchester (author)
- Jamrozy, M.Jagiellonian University in Kraków, Poland (author)
- Jarvis, M.J.University Of Oxford (author)
- Lakhoo, R.University Of Oxford (author)
- Mevius, M.Netherlands Institute for Radio Astronomy (ASTRON) (author)
- Miley, G.Universiteit Leiden (UL),Leiden University (UL) (author)
- Morabito, L.University Of Oxford (author)
- Morganti, R.Netherlands Institute for Radio Astronomy (ASTRON) (author)
- Nisbet, D.Royal Observatory (author)
- Orrú, E.Netherlands Institute for Radio Astronomy (ASTRON) (author)
- Perkins, S. (author)
- Pizzo, R.Surfsara Bv (author)
- Schrijvers, C.University of Hertfordshire (author)
- Smith, D. J.B.Netherlands Institute for Radio Astronomy (ASTRON) (author)
- Vermeulen, R.Netherlands Institute for Radio Astronomy (ASTRON) (author)
- Wise, M. W.Royal Observatory (author)
- Alegre, L.University of Portsmouth (author)
- Bacon, D.J.Joint Institute for VLBI in Europe (JIVE) (author)
- van Bemmel, I.University of Manchester (author)
- Beswick, R. J.Universität Hamburg,University of Hamburg (author)
- Bonafede, A.Istituto di Radioastronomia (author)
- Botteon, A. (author)
- Bourke, S.Netherlands Institute for Radio Astronomy (ASTRON) (author)
- Brienza, M.Universiteit Leiden (UL),Leiden University (UL) (author)
- Calistro Rivera, G.Istituto di Radioastronomia (author)
- Cassano, R.University of Manchester (author)
- Clarke, A. O.University Of Nottingham (author)
- Conselice, C.Ruhr-Universität Bochum (author)
- Dettmar, R. J.Thüringer Landessternwarte Tautenburg (author)
- Drabent, A.Thüringer Landessternwarte Tautenburg (author)
- Dumba, C.Thüringer Landessternwarte Tautenburg (author)
- Emig, K.L.Universiteit Leiden (UL),Leiden University (UL) (author)
- Enßlin, T.A.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
- Ferrari, C.Observatoire de la Cote d'Azur (author)
- Garrett, M. A.University of Manchester (author)
- Génova-Santos, R.T.Universiteit Leiden (UL),Leiden University (UL) (author)
- Goyal, A.Instituto de Astrofísica de Canarias (author)
- Gurkan, G.Universidad de la Laguna,University of La Laguna (author)
- Hale, C.Rhodes University (author)
- Harwood, J. J.Commonwealth Scientific and Industrial Research Organisation (CSIRO) (author)
- Heesen, V.University Of Oxford (author)
- Hoeft, M.University of Hertfordshire (author)
- Horellou, Cathy,1967Universität Hamburg,University of Hamburg(Swepub:cth)horellou (author)
- Jackson, C.Thüringer Landessternwarte Tautenburg (author)
- Kokotanekov, G. (author)
- Kondapally, R.Netherlands Institute for Radio Astronomy (ASTRON) (author)
- Kunert-Bajraszewska, M.Universiteit Van Amsterdam,University of Amsterdam (author)
- Mahatma, V.Royal Observatory (author)
- Mahony, E.Uniwersytet Mikolaja Kopernika w Toruniu,Nicolaus Copernicus University (author)
- Mandal, S.University of Hertfordshire (author)
- McKean, J.Commonwealth Scientific and Industrial Research Organisation (CSIRO) (author)
- Merloni, A.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
- Mingo, B.LESIA - Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique (author)
- Miskolczi, A.Ruhr-Universität Bochum (author)
- Mooney, S.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
- Nikiel-Wroczyński, B.University College Dublin, National University Of Ireland (author)
- O'Sullivan, Shane P.Jagiellonian University in Kraków, Poland (author)
- Quinn, J.Universität Hamburg,University of Hamburg (author)
- Reich, W.University College Dublin, National University Of Ireland (author)
- Roskowiński, C.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
- Rowlinson, A.Uniwersytet Mikolaja Kopernika w Toruniu,Nicolaus Copernicus University (author)
- Savini, F.Universität Hamburg,University of Hamburg (author)
- Saxena, A.Universiteit Leiden (UL),Leiden University (UL) (author)
- Schwarz, D. J.Universität Bielefeld,Bielefeld University (author)
- Shulevski, A.Netherlands Institute for Radio Astronomy (ASTRON) (author)
- Sridhar, S. S.Netherlands Institute for Radio Astronomy (ASTRON) (author)
- Stacey, H.R.Netherlands Institute for Radio Astronomy (ASTRON) (author)
- Urquhart, S.Open University (author)
- van der Wiel, M. H. D.Netherlands Institute for Radio Astronomy (ASTRON) (author)
- Varenius, Eskil,1986Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)varenius (author)
- Webster, B.Open University (author)
- Wilber, A.Universität Hamburg,University of Hamburg (author)
- Netherlands Institute for Radio Astronomy (ASTRON)Observatoire de Paris-Meudon (creator_code:org_t)
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