The LOFAR Two-metre Sky Survey - II. First data release

T. W. Shimwell; C. Tasse; M. J. Hardcastle; A. P. Mechev; W. L. Williams; P. N. Best; H. J. A. Röttgering; J. R. Callingham; T. J. Dijkema; F. de Gasperin; D. N. Hoang; B. Hugo; M. Mirmont; J. B. R. Oonk; I. Prandoni; D. Rafferty; J. Sabater; O. Smirnov; R. J. van Weeren; G. J. White; M. Atemkeng; L. Bester; E. Bonnassieux; M. Brüggen; G. Brunetti; K. T. Chyży; R. Cochrane; J. E. Conway; J. H. Croston; A. Danezi; K. Duncan; M. Haverkorn; G. H. Heald; M. Iacobelli; H. T. Intema; N. Jackson; M. Jamrozy; M. J. Jarvis; R. Lakhoo; M. Mevius; G. K. Miley; L. Morabito; R. Morganti; D. Nisbet; E. Orrú; S. Perkins; R. F. Pizzo; C. Schrijvers; D. J. B. Smith; R. Vermeulen; M. W. Wise; L. Alegre; D. J. Bacon; I. M. van Bemmel; R. J. Beswick; A. Bonafede; A. Botteon; S. Bourke; M. Brienza; G. Calistro Rivera; R. Cassano; A. O. Clarke; C. J. Conselice; R. J. Dettmar; A. Drabent; C. Dumba; K. L. Emig; T. A. Enßlin; C. Ferrari; M. A. Garrett; R. T. Génova-Santos; A. Goyal; G. Gürkan; C. Hale; J. J. Harwood; V. Heesen; M. Hoeft; C. Horellou; C. Jackson; G. Kokotanekov; R. Kondapally; M. Kunert-Bajraszewska; V. Mahatma; E. K. Mahony; S. Mandal; J. P. McKean; A. Merloni; B. Mingo; A. Miskolczi; S. Mooney; B. Nikiel-Wroczyński; S. P. O’Sullivan; J. Quinn; W. Reich; C. Roskowiński; A. Rowlinson; F. Savini; A. Saxena; D. J. Schwarz; A. Shulevski; S. S. Sridhar; H. R. Stacey; S. Urquhart; M. H. D. van der Wiel; E. Varenius; B. Webster; A. Wilber

doi:10.1051/0004-6361/201833559

LOFAR Surveys: a new window on the Universe

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Fig. 3.

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Self-calibration loop of LoTSS-DR1. From left to right and top to bottom: 60 SBs without any DDE correction, 60 SBs after applying DDE phase calibration, 60 SBs after applying DDE phase and amplitude calibration, and 240 SB image after applying DDE phase and amplitude calibration. The colour scales are proportional to the square root of the number of SBs and the black lines show the facets used by kMS and DDFacet.

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