W
Wendy L. Williams
Researcher at Leiden University
Publications - 119
Citations - 5769
Wendy L. Williams is an academic researcher from Leiden University. The author has contributed to research in topics: LOFAR & Galaxy. The author has an hindex of 36, co-authored 119 publications receiving 4196 citations. Previous affiliations of Wendy L. Williams include Council for Scientific and Industrial Research & University of Hertfordshire.
Papers
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Journal ArticleDOI
The LOFAR Two-metre Sky Survey. I. Survey description and preliminary data release
Timothy W. Shimwell,Huub Röttgering,Philip Best,Wendy L. Williams,T. J. Dijkema,F. de Gasperin,Martin J. Hardcastle,George Heald,D. N. Hoang,A. Horneffer,Huib Intema,Elizabeth K. Mahony,Elizabeth K. Mahony,Subhash C. Mandal,A. P. Mechev,Leah K. Morabito,J. B. R. Oonk,J. B. R. Oonk,D. A. Rafferty,E. Retana-Montenegro,J. Sabater,Cyril Tasse,Cyril Tasse,R. J. van Weeren,Marcus Brüggen,Gianfranco Brunetti,Krzysztof T. Chyzy,John Conway,Marijke Haverkorn,Neal Jackson,Matt J. Jarvis,Matt J. Jarvis,John McKean,George K. Miley,Raffaella Morganti,Raffaella Morganti,Glenn J. White,Glenn J. White,Michael W. Wise,Michael W. Wise,I. van Bemmel,Rainer Beck,Marisa Brienza,Annalisa Bonafede,G. Calistro Rivera,Rossella Cassano,A. O. Clarke,D. Cseh,Adam Deller,A. Drabent,W. van Driel,W. van Driel,D. Engels,Heino Falcke,Heino Falcke,Chiara Ferrari,S. Fröhlich,M. A. Garrett,Jeremy J. Harwood,Volker Heesen,Matthias Hoeft,Cathy Horellou,Frank P. Israel,Anna D. Kapińska,Anna D. Kapińska,Magdalena Kunert-Bajraszewska,D. J. McKay,D. J. McKay,N. R. Mohan,Emanuela Orru,R. Pizzo,R. Pizzo,Isabella Prandoni,Dominik J. Schwarz,Aleksandar Shulevski,M. Sipior,Daniel J. Smith,S. S. Sridhar,S. S. Sridhar,Matthias Steinmetz,Andra Stroe,Eskil Varenius,P. van der Werf,J. A. Zensus,Jonathan T. L. Zwart,Jonathan T. L. Zwart +85 more
TL;DR: The LOFAR Two-metre Sky Survey (LoTSS) as mentioned in this paper is a deep 120-168 MHz imaging survey that will eventually cover the entire northern sky, where 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?Jy/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.
Journal ArticleDOI
The LOFAR Two-metre Sky Survey - II. First data release
Timothy W. Shimwell,Timothy W. Shimwell,C. Tasse,C. Tasse,Martin J. Hardcastle,A. P. Mechev,Wendy L. Williams,Philip Best,Huub Röttgering,Joseph R. Callingham,T. J. Dijkema,F. de Gasperin,F. de Gasperin,D. N. Hoang,B. Hugo,M. Mirmont,J. B. R. Oonk,J. B. R. Oonk,Isabella Prandoni,D. A. Rafferty,J. Sabater,Oleg Smirnov,R. J. van Weeren,Glenn J. White,Glenn J. White,Marcellin Atemkeng,L. Bester,E. Bonnassieux,Marcus Brüggen,Gianfranco Brunetti,Krzysztof T. Chyzy,Rachel Cochrane,John Conway,Judith H. Croston,A. Danezi,Kenneth Duncan,Marijke Haverkorn,George Heald,Marco Iacobelli,Huib Intema,Neal Jackson,Marek Jamrozy,Matt J. Jarvis,Matt J. Jarvis,R. Lakhoo,M. Mevius,George K. Miley,Leah K. Morabito,R. Morganti,R. Morganti,D. Nisbet,Emanuela Orru,Simon Perkins,R. Pizzo,C. Schrijvers,Daniel J. Smith,R. C. Vermeulen,Michael W. Wise,Michael W. Wise,L. Alegre,David Bacon,I. van Bemmel,Robert Beswick,Annalisa Bonafede,Annalisa Bonafede,A. Botteon,A. Botteon,Stephen Bourke,Marisa Brienza,Marisa Brienza,G. Calistro Rivera,Rossella Cassano,A. O. Clarke,Christopher J. Conselice,R.-J. Dettmar,A. Drabent,C. Dumba,K. L. Emig,Torsten A. Enßlin,Chiara Ferrari,M. A. Garrett,M. A. Garrett,Ricardo Genova-Santos,Ricardo Genova-Santos,Arti Goyal,G. Gürkan,C. L. Hale,Jeremy J. Harwood,Volker Heesen,Matthias Hoeft,Cathy Horellou,C. A. Jackson,G. Kokotanekov,R. Kondapally,Magdalena Kunert-Bajraszewska,V. H. Mahatma,Elizabeth K. Mahony,Subhash C. Mandal,John McKean,John McKean,Andrea Merloni,Beatriz Mingo,Arpad Miskolczi,S. Mooney,Błażej Nikiel-Wroczyński,Shane O'Sullivan,John L. Quinn,Wolfgang Reich,C. Roskowinski,Antonia Rowlinson,Antonia Rowlinson,F. Savini,A. Saxena,Dominik J. Schwarz,Aleksandar Shulevski,Aleksandar Shulevski,S. S. Sridhar,H. R. Stacey,H. R. Stacey,S. Urquhart,M. H. D. van der Wiel,Eskil Varenius,Eskil Varenius,B. Webster,A. Wilber +124 more
TL;DR: 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 as discussed by the authors.
Journal ArticleDOI
LOFAR 150-MHz observations of the Boötes field: catalogue and source counts
Wendy L. Williams,Wendy L. Williams,Wendy L. Williams,R. J. van Weeren,Huub Röttgering,Philip Best,T. J. Dijkema,F. de Gasperin,Martin J. Hardcastle,George Heald,George Heald,Isabella Prandoni,J. Sabater,Timothy W. Shimwell,C. Tasse,I. van Bemmel,Marcus Brüggen,Gianfranco Brunetti,John Conway,Torsten A. Enßlin,D. Engels,Heino Falcke,Heino Falcke,Chiara Ferrari,Marijke Haverkorn,Marijke Haverkorn,N. J. Jackson,Matt J. Jarvis,Anna D. Kapińska,Anna D. Kapińska,Elizabeth K. Mahony,George K. Miley,Leah K. Morabito,R. Morganti,R. Morganti,Emanuela Orrú,E. Retana-Montenegro,S. S. Sridhar,S. S. Sridhar,M. C. Toribio,Glenn J. White,Glenn J. White,Michael W. Wise,Michael W. Wise,Jonathan T. L. Zwart,Jonathan T. L. Zwart +45 more
TL;DR: In this paper, the authors presented the first wide area (19 deg(2)), deep (a parts per thousand 120-150 mu Jy beam(-1)), high-resolution (5.6 x 7.4 arcsec) LOFAR High Band Antenna image of the Bootes field made at 130-169 MHz.
Journal ArticleDOI
LOFAR facet calibration
R. J. van Weeren,Wendy L. Williams,Wendy L. Williams,Wendy L. Williams,Martin J. Hardcastle,Timothy W. Shimwell,D. A. Rafferty,J. Sabater,George Heald,S. S. Sridhar,S. S. Sridhar,T. J. Dijkema,Gianfranco Brunetti,Marcus Brüggen,Felipe Andrade-Santos,Georgiana A. Ogrean,Huub Röttgering,William A. Dawson,William R. Forman,F. de Gasperin,Christine Jones,George K. Miley,Lawrence Rudnick,Craig L. Sarazin,Annalisa Bonafede,Philip Best,Laura Birzan,Rossella Cassano,Krzysztof T. Chyzy,Judith H. Croston,Torsten A. Ensslin,Chiara Ferrari,Matthias Hoeft,Cathy Horellou,Matt J. Jarvis,Ralph P. Kraft,M. Mevius,Huib Intema,Huib Intema,S. S. Murray,S. S. Murray,Emanuela Orru,R. Pizzo,Aurora Simionescu,Andra Stroe,S. van der Tol,Glenn J. White,Glenn J. White +47 more
TL;DR: In this article, a new calibration scheme, which is called facet calibration, is presented to obtain deep high-resolution LOFAR High Band Antenna images using the Dutch part of the array.
Dataset
LOFAR Two-metre Sky Survey
Timothy W. Shimwell,Huub Röttgering,P. N. Best,Wendy L. Williams,T. J. Dijkema,F. de Gasperin,Martin J. Hardcastle,George Heald,D. N. Hoang,A. Horneffer,Huib Intema,Elizabeth K. Mahony,S. Mandal,A. P. Mechev,Leah K. Morabito,J. B. R. Oonk,D. A. Rafferty,E. Retana-Montenegro,J. Sabater,C. Tasse,R. J. van Weeren,Marcus Brüggen,Gianfranco Brunetti,Krzysztof T. Chyzy,John Conway,Marijke Haverkorn,Neal Jackson,Matt J. Jarvis,John McKean,George K. Miley,Raffaella Morganti,Glenn J. White,Michael W. Wise,I. M. van Bemmel,Ron Beck,M. Brienza,Annalisa Bonafede,G. Calistro Rivera,Rossella Cassano,A. O. Clarke,D. Cseh,Adam Deller,A. Drabent,W. van Driel,D. Engels,Heino Falcke,C. Ferrari,S. Fröhlich,Garrett,Jeremy J. Harwood,Volker Heesen,Matthias Hoeft,Cathy Horellou,Frank P. Israel,Anna D. Kapińska,Magdalena Kunert-Bajraszewska,D. J. McKay,N. R. Mohan,Emanuela Orrú,Roberto Pizzo,Isabella Prandoni,Dominik J. Schwarz,Aleksandar Shulevski,M. Sipior,Daniel J. Smith,S. S. Sridhar,Matthias Steinmetz,Andra Stroe,Eskil Varenius,P. van der Werf,J. A. Zensus,Jonathan T. L. Zwart +71 more
TL;DR: 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 as discussed by the authors.