G
Georgiana A. Ogrean
Researcher at Harvard University
Publications - 38
Citations - 2243
Georgiana A. Ogrean is an academic researcher from Harvard University. The author has contributed to research in topics: Galaxy cluster & Galaxy. The author has an hindex of 26, co-authored 38 publications receiving 2045 citations. Previous affiliations of Georgiana A. Ogrean include Stanford University & Jacobs University Bremen.
Papers
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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.
Journal ArticleDOI
LOFAR, VLA, and Chandra Observations of the Toothbrush Galaxy Cluster
R. J. van Weeren,G. Brunetti,Marcus Brüggen,Felipe Andrade-Santos,Georgiana A. Ogrean,Wendy L. Williams,H. J. A. Röttgering,William A. Dawson,William R. Forman,F. de Gasperin,Martin J. Hardcastle,Christine Jones,George K. Miley,D. Rafferty,Lawrence Rudnick,J. Sabater,Craig L. Sarazin,Timothy W. Shimwell,Annalisa Bonafede,Philip Best,L. Bîrzan,Rossella Cassano,Krzysztof T. Chyzy,Judith H. Croston,T. J. Dijkema,Torsten A. Enßlin,Chiara Ferrari,George Heald,Matthias Hoeft,Cathy Horellou,Matt J. Jarvis,Ralph P. Kraft,Maaijke Mevius,Hubertus Intema,Stephen S. Murray,Emanuela Orrú,Roberto Pizzo,S. S. Sridhar,Aurora Simionescu,Andra Stroe,S. van der Tol,Glenn J. White +41 more
TL;DR: In this article, the authors presented deep LOFAR observations between 120 and 181 MHz of the "Toothbrush" (RX J0603.3+ 4214), a cluster that contains one of the brightest radio relic sources known.
Journal ArticleDOI
The case for electron re-acceleration at galaxy cluster shocks
Reinout J. van Weeren,Felipe Andrade-Santos,William A. Dawson,Nathan Golovich,Dharam V. Lal,Hyesung Kang,Dongsu Ryu,Dongsu Ryu,Marcus Brüggen,Georgiana A. Ogrean,William R. Forman,Christine Jones,Vinicius M. Placco,Rafael M. Santucci,David Wittman,David Wittman,M. James Jee,Ralph P. Kraft,David Sobral,David Sobral,Andra Stroe,Kevin Fogarty +21 more
TL;DR: In this paper, a direct connection between a radio relic and a radio galaxy in the merging galaxy cluster Abell 3411-3412 was made by combining radio, X-ray and optical observations.
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 paper, a new calibration scheme, which is named facet calibration, was proposed to obtain deep high-resolution LOFAR High Band Antenna images using the Dutch part of the array.
Journal ArticleDOI
LOFAR, VLA, and Chandra observations of the Toothbrush galaxy cluster
R. J. van Weeren,G. Brunetti,Marcus Brüggen,Felipe Andrade-Santos,Georgiana A. Ogrean,Wendy L. Williams,H. J. A. Röttgering,William A. Dawson,William R. Forman,F. de Gasperin,Martin J. Hardcastle,Christine Jones,G. K. Miley,D. A. Rafferty,Lawrence Rudnick,J. Sabater,Craig L. Sarazin,Timothy W. Shimwell,Annalisa Bonafede,Philip Best,Laura Birzan,Rossella Cassano,Krzysztof T. Chyzy,Judith H. Croston,T. J. Dijkema,Torsten A. Ensslin,Chiara Ferrari,George Heald,Matthias Hoeft,Cathy Horellou,Matt J. Jarvis,Ralph P. Kraft,Maaijke Mevius,Hubertus Intema,S. S. Murray,Emanuela Orrú,Roberto Pizzo,S. S. Sridhar,Aurora Simionescu,Andra Stroe,S. van der Tol,Glenn J. White +41 more
TL;DR: In this paper, the authors presented deep LOFAR observations between 120-181 MHz of the "Toothbrush" (RX J0603.3+4214), a cluster that contains one of the brightest radio relic sources known.