Academic Journal
The LOFAR Two-metre Sky Survey: II. First data release
| العنوان: | The LOFAR Two-metre Sky Survey: II. First data release |
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| المؤلفون: | Shimwell, T.W., Tasse, C., Hardcastle, M.J., Mechev, A.P., Williams, W.L., Best, P.N., Röttgering, H.J.A., Callingham, J.R., Dijkema, T.J., de Gasperin, F., Hoang, D.N., Hugo, B., Mirmont, M., Oonk, J.B.R., Prandoni, I., Rafferty, D., Sabater, J., Smirnov, O., van Weeren, R.J., White, G.J., Atemkeng, M., Bester, L., Bonnassieux, E., Brüggen, M., Brunetti, G., Chyży, K.T., Cochrane, R., Conway, J.E., Croston, J.H., Danezi, A., Duncan, K., Haverkorn, M., Heald, G.H., Iacobelli, M., Intema, H.T., Jackson, N., Jamrozy, M., Jarvis, M.J., Lakhoo, R., Mevius, M., Miley, G.K., Morabito, L., Morganti, R., Nisbet, D., Orrú, E., Perkins, S., Pizzo, R.F., Schrijvers, C., Smith, D.J.B., Vermeulen, R., Wise, M.W., Alegre, L., Bacon, D.J., van Bemmel, I.M., Beswick, R.J., Bonafede, A., Botteon, A., Bourke, S., Brienza, M., Rivera, G. Calistro, Cassano, R., Clarke, A.O., Conselice, C.J., Dettmar, R.J., Drabent, A., Dumba, C., Emig, K.L., Ensslin, T.A., Ferrari, C., Garrett, M.A., Génova-Santos, R.T., Goyal, A., Gürkan, G., Hale, C., Harwood, J.J., Heesen, V., Hoeft, M., Horellou, C., Jackson, C., Kokotanekov, G., Kondapally, R., Kunert-Bajraszewska, M., Mahatma, V., Mahony, E.K., Mandal, S., Mckean, J.P., Merloni, A., Mingo, B., Miskolczi, A., Mooney, S., Nikiel-Wroczyński, B., O'Sullivan, S.P., Quinn, J., Reich, W., Roskowiński, C., Rowlinson, A., Savini, F., Saxena, A., Schwarz, D.J., Shulevski, A., Sridhar, S.S., Stacey, H.R., Urquhart, S., van Der Wiel, M.H.D., Varenius, E., Webster, B., Wilber, A. |
| المساهمون: | Galaxies, Etoiles, Physique, Instrumentation (GEPI), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Centre National de la Recherche Scientifique (CNRS)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Sciences et Lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Centre National de la Recherche Scientifique (CNRS)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Sciences et Lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Joseph Louis LAGRANGE (LAGRANGE), Université Nice Sophia Antipolis (1965 - 2019) (UNS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UniCA)-Université Côte d'Azur (UniCA)-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | Astron.Astrophys. ; https://hal.science/hal-01991273 ; Astron.Astrophys., 2019, 622, pp.A1. ⟨10.1051/0004-6361/201833559⟩ |
| بيانات النشر: | CCSD |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | surveys, catalogs, radio continuum: general, techniques: image processing, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] |
| الوصف: | International audience ; 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.Key words: surveys / catalogs / radio continuum: general / techniques: image processing⋆ LoTSS.⋆⋆ The catalogue is only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/622/A1 |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/arxiv/1811.07926; ARXIV: 1811.07926; INSPIRE: 1704425 |
| DOI: | 10.1051/0004-6361/201833559 |
| الاتاحة: | https://hal.science/hal-01991273 https://hal.science/hal-01991273v1/document https://hal.science/hal-01991273v1/file/aa33559-18.pdf https://doi.org/10.1051/0004-6361/201833559 |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.4FFFE80D |
| قاعدة البيانات: | BASE |
| DOI: | 10.1051/0004-6361/201833559 |
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