D
D. Keogh
Researcher at Durham University
Publications - 73
Citations - 6919
D. Keogh is an academic researcher from Durham University. The author has contributed to research in topics: Crab Nebula & High Energy Stereoscopic System. The author has an hindex of 44, co-authored 73 publications receiving 6535 citations.
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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
Probing the ATIC peak in the cosmic-ray electron spectrum with H.E.S.S.
Felix Aharonian,A. G. Akhperjanian,Gisela Anton,U. Barres de Almeida,A. R. Bazer-Bachi,Yvonne Becherini,B. Behera,Konrad Bernlöhr,A. Bochow,C. Boisson,J. Bolmont,V. Borrel,J. Brucker,Francois Brun,Pierre Brun,Rolf Bühler,T. Bulik,I. Büsching,Timothé Boutelier,P. M. Chadwick,A. Charbonnier,R. C. G. Chaves,A. Cheesebrough,L.-M. Chounet,G. Coignet,M. Dalton,M. K. Daniel,I. D. Davids,I. D. Davids,B. Degrange,Christoph Deil,Hugh Dickinson,A. Djannati-Ataï,W. Domainko,L. O'c. Drury,Franky Dubois,Guillaume Dubus,J. Dyks,M. Dyrda,Kathrin Egberts,Dimitrios Emmanoulopoulos,P. Espigat,Christian Farnier,F. Feinstein,A. Fiasson,A. Förster,Gerard Fontaine,M. Füßling,Stefano Gabici,Y. A. Gallant,L. Gérard,D. Gerbig,B. Giebels,J. F. Glicenstein,B. Glück,P. Goret,D. Göring,D. Hauser,M. Hauser,S. Heinz,G. Heinzelmann,Gilles Henri,G. Hermann,Jim Hinton,A. Hoffmann,Werner Hofmann,M. Holleran,S. Hoppe,Dieter Horns,A. Jacholkowska,O. C. de Jager,C. Jahn,I. Jung,K. Katarzyński,Uli Katz,Sarah Kaufmann,Eckhard Kendziorra,M. Kerschhaggl,D. Khangulyan,B. Khélifi,D. Keogh,W. Klu'Zniak,T. Kneiske,Nu. Komin,Karl Kosack,R. Kossakowski,G. Lamanna,J.-P. Lenain,Thomas Lohse,V. Marandon,J. M. Martin,Olivier Martineau-Huynh,Alexandre Marcowith,Julien Masbou,David Maurin,T. J. L. McComb,M. C. Medina,R. Moderski,Emmanuel Moulin,M. Naumann-Godo,M. de Naurois,D. Nedbal,D. Nekrassov,B. Nicholas,Jacek Niemiec,S. J. Nolan,Stefan Ohm,J-F. Olive,E. de O˜na,K. J. Orford,Michał Ostrowski,M. Panter,M. Paz Arribas,G. Pedaletti,G. Pelletier,P.-O. Petrucci,S. Pita,Gerd Pühlhofer,Michael Punch,Andreas Quirrenbach,B. C. Raubenheimer,Martin Raue,S. M. Rayner,Olaf Reimer,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. Sch¨ock,R. Schröder,Ullrich Schwanke,S. Schwarzburg,S. Schwemmer,A. Shalchi,J. L. Skilton,Helene Sol,D. Spangler,L. Stawarz,R. Steenkamp,C. Stegmann,F. Stinzing,G. Superina,Anna Szostek,P. H. Tam,J.-P. Tavernet,Regis Terrier,O. Tibolla,M. Tluczykont,C. van Eldik,G. Vasileiadis,Christo Venter,L. Venter,J. P. Vialle,Pascal Vincent,M. Vivier,Heinrich J. Völk,Francesca Volpe,Stefan Wagner,Martin Ward,A. A. Zdziarski,A. Zech +168 more
TL;DR: In this article, the authors present a measurement of the cosmic-ray electron spectrum with H.E.S. starting at 340 GeV and show no indication of a structure in the electron spectrum, but rather a power-law spectrum with spectral index of 3.0 +- 0.1 (stat.) + − 0.3 (syst.) which steepens at about 1 TeV.
Journal ArticleDOI
Search for a Dark Matter annihilation signal from the Galactic Center halo with H.E.S.S
A. Abramowski,Fabio Acero,Felix Aharonian,A. G. Akhperjanian,Gisela Anton,Anna Barnacka,U. Barres de Almeida,A. R. Bazer-Bachi,Yvonne Becherini,J. K. Becker,B. Behera,Konrad Bernlöhr,A. Bochow,Catherine Boisson,J. Bolmont,P. Bordas,V. Borrel,J. Brucker,Francois Brun,P. Brun,Tomasz Bulik,I. Büsching,Svenja Carrigan,Sabrina Casanova,Matteo Cerruti,P. M. Chadwick,A. Charbonnier,R. C. G. Chaves,A. Cheesebrough,L.-M. Chounet,A. C. Clapson,G. Coignet,J. Conrad,M. Dalton,M. K. Daniel,I. D. Davids,B. Degrange,Christoph Deil,H. J. Dickinson,A. Djannati-Ataï,W. Domainko,L. O'c. Drury,Franky Dubois,Guillaume Dubus,J. Dyks,M. Dyrda,K. Egberts,P. Eger,P. Espigat,L. Fallon,Christian Farnier,S. Fegan,F. Feinstein,M. V. Fernandes,A. Fiasson,G. Fontaine,A. Förster,M. Füßling,Y. A. Gallant,H. Gast,L. Gérard,D. Gerbig,B. Giebels,J. F. Glicenstein,B. Glück,P. Goret,D. Göring,J. D. Hague,D. Hampf,M. Hauser,S. Heinz,G. Heinzelmann,Gilles Henri,G. Hermann,Jim Hinton,A. Hoffmann,Werner Hofmann,P. Hofverberg,Dieter Horns,A. Jacholkowska,O. C. de Jager,C. Jahn,Marek Jamrozy,I. Jung,M. A. Kastendieck,Krzysztof Katarzynski,U. F. Katz,S. Kaufmann,D. Keogh,M. Kerschhaggl,D. Khangulyan,B. Khélifi,D. Klochkov,W. Kluźniak,T. Kneiske,Nu. Komin,K. Kosack,R. Kossakowski,H. Laffon,G. Lamanna,Dirk Lennarz,Thomas Lohse,A. Lopatin,Chia-Chun Lu,V. Marandon,A. Marcowith,Julien Masbou,David Maurin,N. Maxted,T. J. L. McComb,M. C. Medina,J. Mehault,R. Moderski,Emmanuel Moulin,C. L. Naumann,M. Naumann-Godo,M. de Naurois,D. Nedbal,D. Nekrassov,N. Nguyen,B. Nicholas,Jacek Niemiec,S. J. Nolan,Stefan Ohm,J-F. Olive,E. de Oña Wilhelmi,B. Opitz,M. Ostrowski,M. Panter,M. Paz Arribas,G. Pedaletti,G. Pelletier,P.-O. Petrucci,S. Pita,G. Pühlhofer,Michael Punch,Andreas Quirrenbach,Martin Raue,S. M. Rayner,A. Reimer,Olaf Reimer,M. Renaud,R. de los Reyes,Frank M. Rieger,Joachim Ripken,L. Rob,S. Rosier-Lees,Gavin Rowell,B. Rudak,C. B. Rulten,J. Ruppel,Felix Ryde,V. Sahakian,Andrea Santangelo,Reinhard Schlickeiser,F. M. Schöck,A. Schönwald,Ullrich Schwanke,S. Schwarzburg,S. Schwemmer,A. Shalchi,M. Sikora,J. L. Skilton,Helene Sol,G. Spengler,Ł. Stawarz,Riaan Steenkamp,Christian Stegmann,F. Stinzing,I. Sushch,Anna Szostek,J.-P. Tavernet,Regis Terrier,O. Tibolla,M. Tluczykont,K. Valerius,C. van Eldik,G. Vasileiadis,Christo Venter,J. P. Vialle,A. Viana,Pascal Vincent,M. Vivier,Heinrich J. Völk,Francesca Volpe,Serguei Vorobiov,M. J. Vorster,Stefan Wagner,Martin Ward,Alicja Wierzcholska,Anna Zajczyk,A. A. Zdziarski,A. Zech,H.-S. Zechlin +193 more
TL;DR: Limits are derived on the velocity-weighted annihilation cross section (σv) as a function of the DM particle mass that are among the best reported so far for this energy range and in particular differ only little between the chosen density profile parametrizations.
Journal ArticleDOI
Detection of Gamma Rays from a Starburst Galaxy
Fabio Acero,Felix Aharonian,Felix Aharonian,A. G. Akhperjanian,Gisela Anton,U. Barres de Almeida,A. R. Bazer-Bachi,Yvonne Becherini,B. Behera,Konrad Bernlöhr,Konrad Bernlöhr,A. Bochow,Catherine Boisson,J. Bolmont,V. Borrel,J. Brucker,F. Brun,Pierre Brun,Rolf Bühler,Tomasz Bulik,I. Büsching,Timothé Boutelier,P. M. Chadwick,A. Charbonnier,R. C. G. Chaves,A. Cheesebrough,L.-M. Chounet,A. C. Clapson,G. Coignet,M. Dalton,M. K. Daniel,I. D. Davids,I. D. Davids,B. Degrange,Christoph Deil,Hugh Dickinson,A. Djannati-Ataï,W. Domainko,L. O'c. Drury,F. Dubois,Guillaume Dubus,J. Dyks,Michal Dyrda,Kathrin Egberts,Dimitrios Emmanoulopoulos,P. Espigat,Christian Farnier,Stephen Fegan,F. Feinstein,A. Fiasson,A. Förster,G. Fontaine,M. Füßling,Stefano Gabici,Y. A. Gallant,L. Gérard,D. Gerbig,B. Giebels,J.F. Glicenstein,B. Glück,P. Goret,D. Göring,D. Hauser,M. Hauser,S. Heinz,G. Heinzelmann,Gilles Henri,German Hermann,Jim Hinton,A. Hoffmann,Werner Hofmann,Petter Hofverberg,S. Hoppe,Dieter Horns,A. Jacholkowska,O. C. de Jager,C. Jahn,I. Jung,K. Katarzyński,U. F. Katz,Sarah Kaufmann,M. Kerschhaggl,Dmitry Khangulyan,B. Khélifi,D. Keogh,D. Klochkov,W. Kluźniak,T. Kneiske,Nu. Komin,K. Kosack,R. Kossakowski,G. Lamanna,J.-P. Lenain,Thomas Lohse,V. Marandon,Olivier Martineau-Huynh,Alexandre Marcowith,Julien Masbou,David Maurin,T. J. L. McComb,M. C. Medina,J. Mehault,R. Moderski,Emmanuel Moulin,M. Naumann-Godo,M. de Naurois,D. Nedbal,D. Nekrassov,B. Nicholas,Jacek Niemiec,S. J. Nolan,Stefan Ohm,J-F. Olive,E. de Oña Wilhelmi,K. J. Orford,Michał Ostrowski,M. Panter,M. Paz Arribas,G. Pedaletti,Guy Pelletier,P.-O. Petrucci,S. Pita,G. Pühlhofer,G. Pühlhofer,Michael Punch,Andreas Quirrenbach,B. C. Raubenheimer,M. Raue,S. M. Rayner,Olaf Reimer,M. Renaud,M. 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,U. Schwanke,S. Schwarzburg,S. Schwemmer,A. Shalchi,M. Sikora,J. L. Skilton,Helene Sol,Łukasz Stawarz,R. Steenkamp,C. Stegmann,F. Stinzing,G. Superina,Anna Szostek,Anna Szostek,P. H. Tam,J. P. Tavernet,Regis Terrier,O. Tibolla,M. Tluczykont,C. van Eldik,G. Vasileiadis,Christo Venter,L. Venter,J. P. Vialle,P. Vincent,M. Vivier,Heinrich J. Völk,Francesca Volpe,Stefan Wagner,Martin Ward,A. A. Zdziarski,A. Zech +175 more
TL;DR: In this paper, the authors reported the detection of gamma rays from the starburst galaxy NGC 253 using the H.E.S. array of imaging atmospheric Cherenkov telescopes.
Journal ArticleDOI
New constraints on the mid-IR EBL from the HESS discovery of VHE gamma-rays from 1ES 0229+200
Felix Aharonian,A. G. Akhperjanian,U. Barres de Almeida,A. R. Bazer-Bachi,B. Behera,M. Beilicke,Wystan Benbow,Konrad Bernlöhr,C. Boisson,O. Bolz,V. Borrel,Ilana M. Braun,E. Brion,A. M. Brown,Rolf Bühler,T. Bulik,I. Büsching,Timothé Boutelier,Svenja Carrigan,P. M. Chadwick,L.-M. Chounet,A. C. Clapson,G. Coignet,R. Cornils,Luigi Costamante,M. Dalton,B. Degrange,Hugh Dickinson,A. Djannati-Ataï,W. Domainko,L. O'c. Drury,F. Dubois,Guillaume Dubus,J. Dyks,Kathrin Egberts,Dimitrios Emmanoulopoulos,P. Espigat,C. Farnier,F. Feinstein,A. Fiasson,A. Förster,Gerard Fontaine,Seb. Funk,M. Füßling,Y. A. Gallant,B. Giebels,J. F. Glicenstein,B. Glück,P. Goret,C. Hadjichristidis,D. Hauser,M. Hauser,G. Heinzelmann,Gilles Henri,G. Hermann,Jim Hinton,A. Hoffmann,Werner Hofmann,M. Holleran,S. Hoppe,Dieter Horns,A. Jacholkowska,O. C. de Jager,I. Jung,K. Katarzyński,Eckhard Kendziorra,M. Kerschhaggl,B. Khélifi,D. Keogh,Nu. Komin,Karl Kosack,G. Lamanna,I. J. Latham,Anne Lemiere,M. Lemoine-Goumard,J.-P. Lenain,Thomas Lohse,Jean Michel Martin,Olivier Martineau-Huynh,A. Marcowith,Conor Masterson,David Maurin,Gilles Maurin,T. J. L. McComb,Rafal Moderski,Emmanuel Moulin,M. de Naurois,D. Nedbal,S. J. Nolan,Stefan Ohm,J.-P. Olive,E. de Oña Wilhelmi,K. J. Orford,J. L. Osborne,Michał Ostrowski,M. Panter,G. Pedaletti,G. Pelletier,P.-O. Petrucci,S. Pita,Gerd Pühlhofer,Michael Punch,S. Ranchon,B. C. Raubenheimer,Martin Raue,S. M. Rayner,Matthieu Renaud,J. Ripken,L. Rob,L. Rolland,S. Rosier-Lees,Gavin Rowell,B. Rudak,J. Ruppel,V. Sahakian,Andrea Santangelo,Reinhard Schlickeiser,F. Schock,R. Schröder,Ullrich Schwanke,S. Schwarzburg,S. Schwemmer,A. Shalchi,Helene Sol,D. Spangler,L. Stawarz,R. Steenkamp,C. Stegmann,G. Superina,P. H. Tam,J.-P. Tavernet,Regis Terrier,C. van Eldik,G. Vasileiadis,Christo Venter,J. P. Vialle,Pascal Vincent,M. Vivier,Heinrich J. Völk,Francesca Volpe,Stefan Wagner,Martin Ward,A. A. Zdziarski,A. Zech +143 more
TL;DR: In this paper, a very high energy (VHE: >100 GeV) γ-ray emission from the high-frequency peaked BL Lac 1ES 0229+200 was detected at the 6.6σ level in the HESS observations (41.8 h live time).