B
B. Degrange
Researcher at École Polytechnique
Publications - 269
Citations - 23601
B. Degrange is an academic researcher from École Polytechnique. The author has contributed to research in topics: High Energy Stereoscopic System & Blazar. The author has an hindex of 76, co-authored 268 publications receiving 22350 citations. Previous affiliations of B. Degrange include Centre national de la recherche scientifique & Purdue University.
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Journal ArticleDOI
An Exceptional Very High Energy Gamma-Ray Flare of PKS 2155-304
Felix Aharonian,A. G. Akhperjanian,A. R. Bazer-Bachi,M. Beilicke,Wystan Benbow,David Berge,Konrad Bernlöhr,Catherine Boisson,O. Bolz,V. Borrel,Ilana M. Braun,E. Brion,A. M. Brown,Rolf Bühler,I. Büsching,Timothé Boutelier,Svenja Carrigan,P. M. Chadwick,L.-M. Chounet,G. Coignet,R. Cornils,Luigi Costamante,B. Degrange,Hugh Dickinson,A. Djannati-Ataï,L. O'Connor-Drury,Guillaume Dubus,Kathrin Egberts,Dimitrios Emmanoulopoulos,P. Espigat,C. Farnier,F. Feinstein,E. Ferrero,A. Fiasson,G. Fontaine,Seb. Funk,M. Fuling,Y. A. Gallant,B. Giebels,J.F. Glicenstein,B. Glück,P. Goret,C. Hadjichristidis,D. Hauser,M. Hauser,G. Heinzelmann,Gilles Henri,German Hermann,Jim Hinton,A. Hoffmann,Werner Hofmann,M. Holleran,S. Hoppe,Dieter Horns,A. Jacholkowska,O. C. de Jager,Eckhard Kendziorra,M. Kerschhaggl,B. Khélifi,Nu. Komin,K. Kosack,G. Lamanna,I. J. Latham,R. Le Gallou,Anne Lemiere,M. Lemoine-Goumard,Thomas Lohse,Jean Michel Martin,Olivier Martineau-Huynh,A. Marcowith,Conor Masterson,Gilles Maurin,T. J. L. McComb,Emmanuel Moulin,M. de Naurois,D. Nedbal,S. J. Nolan,A. Noutsos,J.-P. Olive,K. J. Orford,J. L. Osborne,M. Panter,Guy Pelletier,P.-O. Petrucci,S. Pita,G. Pühlhofer,Michael Punch,S. Ranchon,B. C. Raubenheimer,M. Raue,S. M. Rayner,A. Reimer,Olaf Reimer,J. Ripken,L. Rob,L. Rolland,S. Rosier-Lees,Gavin Rowell,V. Sahakian,Andrea Santangelo,L. Saugé,S. Schlenker,Reinhard Schlickeiser,R. Schröder,U. Schwanke,S. Schwarzburg,S. Schwemmer,A. Shalchi,Helene Sol,D. Spangler,Felix Spanier,R. Steenkamp,C. Stegmann,G. Superina,P. H. Tam,J. P. Tavernet,Regis Terrier,M. Tluczykont,C. van Eldik,G. Vasileiadis,Christo Venter,J. P. Vialle,P. Vincent,Heinrich J. Völk,Stefan Wagner,Martin Ward +125 more
TL;DR: In this paper, the average flux observed during an extreme gamma-ray outburst is I(>200 GeV) = (1.72$\pm$$0.05_{\rm stat}
Journal ArticleDOI
Observations of the Crab nebula with HESS
Felix Aharonian,A. G. Akhperjanian,A. R. Bazer-Bachi,M. Beilicke,Wystan Benbow,David Berge,Konrad Bernlöhr,Catherine Boisson,O. Bolz,V. Borrel,Ilana M. Braun,F. Breitling,A. M. Brown,Rolf Bühler,I. Büsching,Svenja Carrigan,P. M. Chadwick,L.-M. Chounet,R. Cornils,Luigi Costamante,B. Degrange,Hugh Dickinson,A. Djannati-Ataï,L. O'c. Drury,Guillaume Dubus,Kathrin Egberts,Dimitrios Emmanoulopoulos,P. Espigat,F. Feinstein,E. Ferrero,A. Fiasson,G. Fontaine,Seb. Funk,Stefan Funk,Y. A. Gallant,B. Giebels,J.F. Glicenstein,P. Goret,C. Hadjichristidis,D. Hauser,M. Hauser,G. Heinzelmann,Gilles Henri,German Hermann,Jim Hinton,Werner Hofmann,M. Holleran,Dieter Horns,A. Jacholkowska,O. C. de Jager,B. Khélifi,Nu. Komin,A. Konopelko,Karl Kosack,I. J. Latham,R. Le Gallou,Anne Lemiere,M. Lemoine-Goumard,Thomas Lohse,Jean Michel Martin,Olivier Martineau-Huynh,A. Marcowith,Conor Masterson,T. J. L. McComb,M. de Naurois,D. Nedbal,S. J. Nolan,A. Noutsos,K. J. Orford,J. L. Osborne,M. Ouchrif,M. Panter,G. Pelletier,S. Pita,G. Pühlhofer,Michael Punch,B. C. Raubenheimer,M. Raue,S. M. Rayner,A. Reimer,Olaf Reimer,J. Ripken,L. Rob,L. Rolland,Gavin Rowell,V. Sahakian,L. Saugé,S. Schlenker,Reinhard Schlickeiser,U. Schwanke,Helene Sol,D. Spangler,Felix Spanier,R. Steenkamp,C. Stegmann,G. Superina,J.-P. Tavernet,Regis Terrier,C. G. Théoret,M. Tluczykont,C. van Eldik,G. Vasileiadis,Christo Venter,P. Vincent,Heinrich J. Völk,S. J. Wagnern,Martin Ward +106 more
TL;DR: In this paper, the Crab nebula was observed with the H.E.S. stereoscopic Cherenkov-telescope array between 2003 and 2005 for a total of 22.9 hours (after data quality selection).
Journal ArticleDOI
Energy Spectrum of Cosmic-Ray Electrons at TeV Energies
Felix Aharonian,A. G. Akhperjanian,U. Barres de Almeida,A. R. Bazer-Bachi,Yvonne Becherini,B. Behera,Wystan Benbow,Konrad Bernlöhr,Catherine Boisson,A. Bochow,V. Borrel,Ilana M. Braun,E. Brion,J. Brucker,Pierre Brun,Rolf Bühler,Tomasz Bulik,I. Büsching,Timothé Boutelier,Svenja Carrigan,P. M. Chadwick,A. Charbonnier,R. C. G. Chaves,A. Cheesebrough,L.-M. Chounet,A. C. Clapson,G. Coignet,Luigi Costamante,M. Dalton,B. Degrange,Christoph Deil,Hugh Dickinson,A. Djannati-Ataï,W. Domainko,Luke O'c. Drury,Franky Dubois,Guillaume Dubus,J. Dyks,M. Dyrda,Kathrin Egberts,Dimitrios Emmanoulopoulos,P. Espigat,C. Farnier,F. Feinstein,A. Fiasson,A. Förster,G. Fontaine,M. Fussling,Stefano Gabici,Y. A. Gallant,L. Gérard,B. Giebels,J.F. Glicenstein,B. Glück,P. Goret,C. Hadjichristidis,D. Hauser,M. Hauser,S. Heinz,G. Heinzelmann,Gilles Henri,German Hermann,Jim Hinton,A. Hoffmann,Werner Hofmann,M. Holleran,S. Hoppe,Dieter Horns,A. Jacholkowska,O. C. de Jager,I. Jung,K. Katarzyński,Sarah Kaufmann,Eckhard Kendziorra,M. Kerschhaggl,Dmitry Khangulyan,B. Khélifi,D. Keogh,Nu. Komin,K. Kosack,G. Lamanna,J.-P. Lenain,Thomas Lohse,V. Marandon,Jean Michel Martin,Olivier Martineau-Huynh,A. Marcowith,David Maurin,T. J. L. McComb,C. Medina,Rafał Moderski,Emmanuel Moulin,M. Naumann-Godo,M. de Naurois,D. Nedbal,D. Nekrassov,Jacek Niemiec,S. J. Nolan,Stefan Ohm,J-F. Olive,E. D. Wilhelmi,K. J. Orford,J. L. Osborne,Michał Ostrowski,M. Panter,G. Pedaletti,G. Pelletier,P.-O. Petrucci,S. Pita,G. Pühlhofer,Michael Punch,Andreas Quirrenbach,B. C. Raubenheimer,M. Raue,S. M. Rayner,Matthieu Renaud,Frank M. Rieger,J. Ripken,L. Rob,S. Rosier-Lees,Gavin Rowell,B. Rudak,Cameron B Rulten,J. Ruppel,V. Sahakian,Andrea Santangelo,Reinhard Schlickeiser,F. M. Schöck,R. Schröder,U. Schwanke,S. Schwarzburg,S. Schwemmer,A. Shalchi,J. L. Skilton,Helene Sol,D. Spangler,L. Stawarz,R. Steenkamp,C. Stegmann,G. Superina,P. H. Tam,J. P. Tavernet,Regis Terrier,O. Tibolla,C. van Eldik,G. Vasileiadis,Christo Venter,J. P. Vialle,P. Vincent,M. Vivier,Heinrich J. Völk,Francesca Volpe,Stefan Wagner,Martin Ward,Andrzej A. Zdziarski,A. Zech +155 more
TL;DR: In this measurement, the first of this type, the High Energy Stereoscopic System is able to extend the measurement of the electron spectrum beyond the range accessible to direct measurements, finding evidence for a substantial steepening in the energy spectrum above 600 GeV compared to lower energies.
Journal ArticleDOI
A low level of extragalactic background light as revealed by gamma-rays from blazars.
Felix Aharonian,A. G. Akhperjanian,A. R. Bazer-Bachi,M. Beilicke,Wystan Benbow,David Berge,Konrad Bernlöhr,Konrad Bernlöhr,Catherine Boisson,O. Bolz,V. Borrel,Ilana M. Braun,F. Breitling,A. M. Brown,P. M. Chadwick,L.-M. Chounet,R. Cornils,Luigi Costamante,B. Degrange,Hugh Dickinson,A. Djannati-Ataï,L. O'c. Drury,Guillaume Dubus,Dimitrios Emmanoulopoulos,P. Espigat,F. Feinstein,G. Fontaine,Y. Fuchs,Stefan Funk,Y. A. Gallant,B. Giebels,Stefan Gillessen,J. F. Glicenstein,P. Goret,C. Hadjichristidis,D. Hauser,M. Hauser,G. Heinzelmann,Gilles Henri,G. Hermann,Jim Hinton,Werner Hofmann,M. Holleran,Dieter Horns,A. Jacholkowska,O. C. de Jager,B. Khélifi,Sven Klages,Nu. Komin,A. Konopelko,I. J. Latham,R. Le Gallou,Anne Lemiere,M. Lemoine-Goumard,N. Leroy,Thomas Lohse,Jean Michel Martin,O. Martineau-Huynh,A. Marcowith,Conor Masterson,T. J. L. McComb,M. de Naurois,S. J. Nolan,A. Noutsos,K. J. Orford,J. L. Osborne,M. Ouchrif,M. Panter,Guy Pelletier,S. Pita,G. Pühlhofer,Michael Punch,B. C. Raubenheimer,Martin Raue,J. Raux,S. M. Rayner,A. Reimer,Olaf Reimer,J. Ripken,L. Rob,L. Rolland,Gavin Rowell,V. Sahakian,L. Saugé,S. Schlenker,Reinhard Schlickeiser,C. Schuster,Ullrich Schwanke,M. Siewert,Helene Sol,D. Spangler,R. Steenkamp,C. Stegmann,J.-P. Tavernet,Regis Terrier,C. G. Théoret,M. Tluczykont,C. van Eldik,G. Vasileiadis,Christo Venter,P. Vincent,Heinrich J. Völk,Stefan Wagner +102 more
TL;DR: In this paper, an alternative approach is proposed based on the detection and identification of EBL absorption features in high-energy spectra of objects of known redshift, which provides the most stringent upper limit to date on the EBL in the Opt-NIR band, which appears significantly lower than expected from the current direct estimates and very close to the absolute lower limit represented by the integrated light of resolved galaxies.
Journal ArticleDOI
The H.E.S.S. Survey of the Inner Galaxy in Very High Energy Gamma Rays
Felix Aharonian,A. G. Akhperjanian,A. R. Bazer-Bachi,M. Beilicke,Wystan Benbow,David Berge,Konrad Bernlöhr,Konrad Bernlöhr,Catherine Boisson,O. Bolz,V. Borrel,Ilana M. Braun,F. Breitling,A. M. Brown,P. M. Chadwick,L.-M. Chounet,R. Cornils,Luigi Costamante,Luigi Costamante,B. Degrange,Hugh Dickinson,A. Djannati-Ataï,L. O'c. Drury,Guillaume Dubus,Dimitrios Emmanoulopoulos,P. Espigat,F. Feinstein,G. Fontaine,Y. Fuchs,Seb. Funk,Y. A. Gallant,B. Giebels,Stefan Gillessen,J. F. Glicenstein,P. Goret,C. Hadjichristidis,M. Hauser,G. Heinzelmann,Gilles Henri,G. Hermann,Jim Hinton,Werner Hofmann,M. Holleran,Dieter Horns,A. Jacholkowska,O. C. de Jager,B. Khélifi,Nu. Komin,A. Konopelko,A. Konopelko,I. J. Latham,R. Le Gallou,A. Lemière,M. Lemoine-Goumard,N. Leroy,Thomas Lohse,Jean Michel Martin,Olivier Martineau-Huynh,A. Marcowith,Conor Masterson,Conor Masterson,T. J. L. McComb,M. de Naurois,S. J. Nolan,A. Noutsos,K. J. Orford,J. L. Osborne,M. Ouchrif,M. Panter,Guy Pelletier,S. Pita,Gerd Pühlhofer,Michael Punch,B. C. Raubenheimer,Martin Raue,J. Raux,S. M. Rayner,A. Reimer,Olaf Reimer,J. Ripken,L. Rob,L. Rolland,Gavin Rowell,V. Sahakian,L. Saugé,S. Schlenker,Reinhard Schlickeiser,C. Schuster,Ullrich Schwanke,M. Siewert,Helene Sol,D. Spangler,R. Steenkamp,C. Stegmann,J.-P. Tavernet,R. Terrier,C. G. Théoret,M. Tluczykont,M. Tluczykont,G. Vasileiadis,Christo Venter,Pascal Vincent,Heinrich J. Völk,Stefan Wagner +103 more
TL;DR: The distribution in Galactic latitude of the detected sources appears to be consistent with a scale height in the Galactic disk for the parent population smaller than 100 pc, consistent with expectations for supernova remnants and/or pulsar wind nebulae.