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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/27207
Title: The LOFAR Two-metre Sky Survey. I. Survey description and preliminary data release
Authors: Shimwell, T. W.
Röttgering, H. J. A.
Best, P. N.
Williams, W. L.
Dijkema, T. J.
de Gasperin, F.
Hardcastle, M. J.
Heald, G. H.
Hoang, D. N.
Horneffer, A.
Intema, H.
Mahony, E. K.
Mandal, S.
Mechev, A. P.
Morabito, L.
Oonk, J. B. R.
Rafferty, D.
Retana-Montenegro, E.
Sabater, J.
Tasse, C.
van Weeren, R. J.
Brüggen, M.
BRUNETTI, GIANFRANCO 
Chyży, K. T.
Conway, J. E.
Haverkorn, M.
Jackson, N.
Jarvis, M. J.
McKean, J. P.
Miley, G. K.
Morganti, R.
White, G. J.
Wise, M. W.
van Bemmel, I. M.
Beck, R.
BRIENZA, MARISA 
BONAFEDE, ANNALISA 
Calistro Rivera, G.
CASSANO, Rossella 
Clarke, A. O.
Cseh, D.
Deller, A.
Drabent, A.
van Driel, W.
Engels, D.
Falcke, H.
Ferrari, C.
Fröhlich, S.
Garrett, M. A.
Harwood, J. J.
Heesen, V.
Hoeft, M.
Horellou, C.
Israel, F. P.
Kapińska, A. D.
Kunert-Bajraszewska, M.
McKay, D. J.
Mohan, N. R.
Orrú, E.
Pizzo, R. F.
PRANDONI, ISABELLA 
Schwarz, D. J.
Shulevski, A.
Sipior, M.
Smith, D. J. B.
Sridhar, S. S.
Steinmetz, M.
Stroe, A.
Varenius, E.
van der Werf, P. P.
Zensus, J. A.
Zwart, J. T. L.
Issue Date: 2017
Journal: ASTRONOMY & ASTROPHYSICS 
Number: 598
First Page: A104
Abstract: The LOFAR Two-metre Sky Survey (LoTSS) is a deep 120-168 MHz imaging survey that will eventually cover the entire northern sky. Each of the 3170 pointings will be observed for 8 h, which, at most declinations, is sufficient to produce 5″ resolution images with a sensitivity of 100 μJy/beam and accomplish the main scientific aims of the survey, which are to explore the formation and evolution of massive black holes, galaxies, clusters of galaxies and large-scale structure. Owing to the compact core and long baselines of LOFAR, the images provide excellent sensitivity to both highly extended and compact emission. For legacy value, the data are archived at high spectral and time resolution to facilitate subarcsecond imaging and spectral line studies. In this paper we provide an overview of the LoTSS. We outline the survey strategy, the observational status, the current calibration techniques, a preliminary data release, and the anticipated scientific impact. The preliminary images that we have released were created using a fully automated but direction-independent calibration strategy and are significantly more sensitive than those produced by any existing large-area low-frequency survey. In excess of 44 000 sources are detected in the images that have a resolution of 25″, typical noise levels of less than 0.5 mJy/beam, and cover an area of over 350 square degrees in the region of the HETDEX Spring Field (right ascension 10h45m00s to 15h30m00s and declination 45°00'00″ to 57°00'00″). <P />The catalogue (full Table 3) is only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (<A href="http://130.79.128.5">http://130.79.128.5</A>) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/598/A104">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/598/A104
URI: http://hdl.handle.net/20.500.12386/27207
URL: http://arxiv.org/abs/1611.02700v1
https://www.aanda.org/articles/aa/abs/2017/02/aa29313-16/aa29313-16.html
ISSN: 0004-6361
DOI: 10.1051/0004-6361/201629313
Bibcode ADS: 2017A&A...598A.104S
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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Shimwell+2017 (1).pdfPdf editoriale pt. 17.76 MBAdobe PDFView/Open
Shimwell+2017 (2).pdfPdf editoriale pt. 29.6 MBAdobe PDFView/Open
Shimwell+2017 (3).pdfPdf editoriale pt. 33.28 MBAdobe PDFView/Open
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