Roger A. Chevalier
University of Virginia
288 Papers
3K Citations
Roger A. Chevalier is an academic researcher from University of Virginia. The author has contributed to research in topics: Supernova & Supernova remnant. The author has an hindex of 87, co-authored 284 publications. Previous affiliations of Roger A. Chevalier include Kitt Peak National Observatory & Advanced Technology Center.
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Papers
Multi-Wavelength Observations of GRB 050820A: An Exceptionally Energetic Event Followed from Start to Finish
S. B. Cenko,M. M. Kasliwal,Fiona A. Harrison,V. Pal'Shin,Dale A. Frail,P. B. Cameron,Edo Berger,D. B. Fox,Avishay Gal-Yam,S. R. Kulkarni,D.-S. Moon,Ehud Nakar,Eran O. Ofek,Bryan E. Penprase,P. A. Price,Ramazan Sari,Brian P. Schmidt,Alicia Soderberg,R. Aptekar,D. D. Frederiks,S. Golenetskii,D. N. Burrows,Roger A. Chevalier,N. Gehrels,P. J. McCarthy,J. A. Nousek,S. E. Persson,Tsvi Piran +27 more
TL;DR: In this article, the gamma-ray light curve is marked by a soft precursor pulse some 200 s before the main event; the lack of any intervening emission suggests that it is due to a physical mechanism distinct from the GRB itself.
A Deep Search for Prompt Radio Emission from Thermonuclear Supernovae with the Very Large Array
Laura Chomiuk,Alicia M. Soderberg,Roger A. Chevalier,S. Bruzewski,Ryan J. Foley,Jerod Parrent,Jay Strader,Carles Badenes,Claes Fransson,Atish Kamble,Raffaella Margutti,Michael P. Rupen,Joshua D. Simon +12 more
TL;DR: In this article, the authors present the largest, most sensitive, and spectroscopically diverse study of prompt (delta t <~ 1 yr) radio observations of 85 thermonuclear SNe, including 25 obtained by their team with the unprecedented depth of the Karl G. Jansky Very Large Array.
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X-ray illumination of the ejecta of supernova 1987A.
Josefin Larsson,Claes Fransson,Göran Östlin,Per Gröningsson,Anders Jerkstrand,Cecilia Kozma,Jesper Sollerman,P. Challis,Robert P. Kirshner,Roger A. Chevalier,Kevin Heng,Richard McCray,Nicholas B. Suntzeff,Patrice Bouchet,Arlin P. S. Crotts,J. Danziger,Eli Dwek,P. M. Garnavich,Stephen S. Lawrence,Bruno Leibundgut,Peter Lundqvist,Nino Panagia,C. S. J. Pun,Nathan Smith,George Sonneborn,Ling-Jun Wang,John C Wheeler +26 more
TL;DR: Observations that show the transition to this phase in the supernova SN 1987A in the Large Magellanic Cloud show that the flux started to increase, more than doubling by the end of 2009, and it is shown that this increase is the result of heat deposited by X-rays produced as the ejecta interacts with the surrounding material.
Hubble Space Telescope WFPC-2 Imaging of Cassiopeia A
Robert A. Fesen,Jon A. Morse,Roger A. Chevalier,Kazimierz J. Borkowski,Christopher L. Gerardy,Stephen S. Lawrence,Sidney van den Bergh +6 more
TL;DR: The young SNR Cassiopeia A was imaged with WFPC-2 through four filters selected to capture the complete velocity range of the remnant's main shell in several important emission lines.
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The signature of the central engine in the weakest relativistic explosions: GRB100316D
R. Margutti,Alicia Soderberg,M. H. Wieringa,Philip G. Edwards,Roger A. Chevalier,Brian J. Morsony,R. Barniol Duran,Lorenzo Sironi,B. A. Zauderer,Dan Milisavljevic,Atish Kamble,Elena Pian +11 more
TL;DR: In this paper, a broad-band analysis of the gamma-ray burst (GRB)100316D associated with supernova (SN) 2010bh is presented, showing that it is coupled to a quasi-spherical ejecta, expanding into a medium previously shaped by the progenitor mass-loss with rate Mdot ~10^-5 Msun yr^-1 (for wind velocity v_w = 1000 km s.
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