K
Karen E. Williamson
Researcher at Boston University
Publications - 23
Citations - 942
Karen E. Williamson is an academic researcher from Boston University. The author has contributed to research in topics: Blazar & Very Long Baseline Array. The author has an hindex of 11, co-authored 22 publications receiving 802 citations.
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Journal ArticleDOI
A tight connection between gamma-ray outbursts and parsec-scale jet activity in the quasar 3c 454.3
Svetlana G. Jorstad,Svetlana G. Jorstad,Alan P. Marscher,Paul S. Smith,Valeri M. Larionov,Valeri M. Larionov,Iván Agudo,Iván Agudo,Mark Gurwell,Ann E. Wehrle,Anne Lähteenmäki,Maria G. Nikolashvili,Gary D. Schmidt,Arkady A. Arkharov,Dmitry A. Blinov,K. Blumenthal,Carolina Casadio,R. A. Chigladze,N. V. Efimova,Joseph R. Eggen,José L. Gómez,Dirk Grupe,Vladimir A. Hagen-Thorn,Vladimir A. Hagen-Thorn,Manasvita Joshi,Givi N. Kimeridze,Tatiana S. Konstantinova,Evgenia N. Kopatskaya,Omar M. Kurtanidze,Sofia O. Kurtanidze,Elena G. Larionova,L. V. Larionova,Lorand A. Sigua,Nicholas R. MacDonald,Jeremy D. Maune,Ian M. McHardy,H. Richard Miller,Sol N. Molina,Daria A. Morozova,Terri L. Scott,Brian W. Taylor,Brian W. Taylor,Merja Tornikoski,Ivan S. Troitsky,Clemens Thum,G. Walker,Karen E. Williamson,Stephanie Sallum,Santina Consiglio,V. Strelnitski +49 more
TL;DR: In this paper, the authors analyzed the multi-frequency behavior of the quasar 3C.454.3 during three prominent γ-ray outbursts: 2009 Autumn, 2010 Spring, and 2010 Autumn.
Journal ArticleDOI
A Tight Connection between Gamma-Ray Outbursts and Parsec-Scale Jet Activity in the Quasar 3C 454.3
Svetlana G. Jorstad,Alan P. Marscher,Paul S. Smith,Valeri M. Larionov,Ivan Agudo,Mark Gurwell,Ann E. Wehrle,Anne Lähteenmäki,Maria G. Nikolashvili,Gary D. Schmidt,Arkady A. Arkharov,Dmitry A. Blinov,K. Blumenthal,Carolina Casadio,R. A. Chigladze,Natatia V. Efimova,Joseph R. Eggen,José L. Gómez,Dirk Grupe,Vladimir A. Hagen-Thorn,Manasvita Joshi,Givi N. Kimeridze,Tatiana S. Konstantinova,Evgenia N. Kopatskaya,Omar M. Kurtanidze,Sofia O. Kurtanidze,Elena G. Larionova,L. V. Larionova,Sigua A. Lorand,Nicholas R. MacDonald,Jeremy D. Maune,Ian M. McHardy,H. Richard Miller,Sol N. Molina,Daria A. Morozova,Terri L. Scott,Brian W. Taylor,Merja Tornikoski,Ivan S. Troitsky,Clemens Thum,G. Walker,Karen E. Williamson,Stephanie Sallum,Santina Consiglio,V. Strelnitski +44 more
TL;DR: In this paper, the authors analyzed the multiscale behavior of the quasar 3C 454.3 during three prominent gamma-ray outbursts: 2009 Autumn, 2010 Spring, and 2010 Autumn.
Journal ArticleDOI
Multiwavelength Variations of 3C 454.3 during the 2010 November to 2011 January Outburst
Ann E. Wehrle,Alan P. Marscher,Svetlana G. Jorstad,Svetlana G. Jorstad,Mark Gurwell,Manasvita Joshi,Nicholas R. MacDonald,Karen E. Williamson,Iván Agudo,Iván Agudo,Dirk Grupe +10 more
TL;DR: In this article, the authors present multi-wavelength data of the blazar 3C 454.3 obtained during an extremely bright outburst from 2010 November through 2011 January, and form a series of 52 spectral energy distributions (SEDs) spanning nearly two months that are unprecedented in time coverage and breadth of frequency.
Journal ArticleDOI
Multiwavelength Variations of 3C 454.3 during the November 2010 to January 2011 Outburst
Ann E. Wehrle,Alan P. Marscher,Svetlana G. Jorstad,Mark Gurwell,Manasvita Joshi,Nicholas R. MacDonald,Karen E. Williamson,Ivan Agudo,Dirk Grupe +8 more
TL;DR: In this article, the authors present multi-wavelength data of the blazar 3C 454.3 obtained during an extremely bright outburst from November 2010 through January 2011, and propose a model in which turbulent plasma crosses a conical standing shock in the parsec-scale region of the jet.
Journal ArticleDOI
A Multi-wavelength Polarimetric Study of the Blazar CTA 102 during a Gamma-Ray Flare in 2012
Carolina Casadio,José L. Gómez,Svetlana G. Jorstad,Svetlana G. Jorstad,Alan P. Marscher,Valeri M. Larionov,Valeri M. Larionov,Paul S. Smith,Mark Gurwell,Anne Lähteenmäki,Ivan Agudo,Sol N. Molina,Vishal Bala,Manasvita Joshi,Brian Taylor,Karen E. Williamson,Arkady A. Arkharov,Dmitry A. Blinov,Dmitry A. Blinov,G. A. Borman,Andrea Di Paola,T. S. Grishina,Vladimir A. Hagen-Thorn,Ryosuke Itoh,Evgenia N. Kopatskaya,Elena G. Larionova,L. V. Larionova,Daria A. Morozova,Elizaveta Rastorgueva-Foi,Elizaveta Rastorgueva-Foi,Sergey G. Sergeev,Merja Tornikoski,Ivan S. Troitsky,Clemens Thum,Helmut Wiesemeyer +34 more
TL;DR: In this paper, the authors performed a multi-wavelength polarimetric study of the quasar CTA 102 during an extraordinarily bright γ-ray outburst detected by the Fermi Large Area Telescope in 2012 September-October when the source reached a flux of F{sub >100} {sub MeV} = 5.2 ± 0.4 × 10.4