W
Werner Hofmann
Researcher at Max Planck Society
Publications - 793
Citations - 56940
Werner Hofmann is an academic researcher from Max Planck Society. The author has contributed to research in topics: High Energy Stereoscopic System & HEGRA. The author has an hindex of 100, co-authored 777 publications receiving 51945 citations. Previous affiliations of Werner Hofmann include University of California, Berkeley & Heidelberg University.
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Journal ArticleDOI
Spectral analysis and interpretation of the \gamma-ray emission from the Starburst galaxy NGC 253
A. Abramowski,Fabio Acero,Felix Aharonian,A. G. Akhperjanian,Gisela Anton,A. Balzer,Anna Barnacka,Yvonne Becherini,J. K. Becker,Konrad Bernlöhr,E. Birsin,Jonathan Biteau,A. Bochow,C. Boisson,J. Bolmont,P. Bordas,J. Brucker,Francois Brun,Pierre Brun,Tomasz Bulik,I. Büsching,Svenja Carrigan,Sabrina Casanova,Matteo Cerruti,P. M. Chadwick,A. Charbonnier,R. C. G. Chaves,A. Cheesebrough,G. Cologna,Jan Conrad,C. Couturier,M. Dalton,M. K. Daniel,Isak Delberth Davids,B. Degrange,Christoph Deil,Hugh Dickinson,A. Djannati-Ataï,W. Domainko,L. O'c. Drury,Guillaume Dubus,K. Dutson,J. Dyks,Michal Dyrda,K. Egberts,Peter Eger,P. Espigat,L. Fallon,S. J. Fegan,F. Feinstein,M. V. Fernandes,A. Fiasson,Gerard Fontaine,A. Förster,M. Füßling,M. Gajdus,Y. A. Gallant,T. Garrigoux,Henning Gast,L. Gérard,B. Giebels,J. F. Glicenstein,B. Glück,D. Göring,M.-H. Grondin,S. Häffner,J. D. Hague,Joachim Hahn,Daniel Hampf,J. Harris,M. Hauser,S. Heinz,G. Heinzelmann,Gilles Henri,G. Hermann,Andreas Hillert,Jim Hinton,Werner Hofmann,Petter Hofverberg,Markus Holler,Dieter Horns,A. Jacholkowska,C. Jahn,Marek Jamrozy,I. Jung,M. A. Kastendieck,Krzysztof Katarzynski,U. F. Katz,Sarah Kaufmann,B. Khélifi,D. Klochkov,W. Kluźniak,T. Kneiske,Nu. Komin,K. Kosack,R. Kossakowski,F. Krayzel,H. Laffon,G. Lamanna +98 more
TL;DR: In this paper, very high-energy (VHE; E >100 GeV) and high energy (HE; 100 MeV < E < 100 GeV), data from gamma-ray observations performed with the H.E.S. telescope array and the Fermi-LAT instrument, respectively, are analyzed in order to investigate the non-thermal processes in the starburst galaxy NGC 253.
Journal ArticleDOI
Revisiting the Westerlund 2 Field with the H.E.S.S. Telescope Array
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,C. Boisson,J. Bolmont,P. Bordas,V. Borrel,J. Brucker,Francois Brun,Pierre Brun,T. Bulik,I. Büsching,Timothé Boutelier,Sabrina Casanova,Matteo Cerruti,P. M. Chadwick,A. Charbonnier,R. C. G. Chaves,A. Cheesebrough,Jan Conrad,L.-M. Chounet,A. C. Clapson,G. Coignet,M. Dalton,M. K. Daniel,Isak Delberth Davids,B. Degrange,Christoph Deil,Hugh Dickinson,A. Djannati-Ataï,W. Domainko,L. O'c. Drury,Franky Dubois,Guillaume Dubus,J. Dyks,Michal Dyrda,K. Egberts,Peter Eger,P. Espigat,L. Fallon,C. Farnier,S. J. Fegan,F. Feinstein,M. V. Fernandes,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,J. D. Hague,Daniel Hampf,M. Hauser,S. Heinz,G. Heinzelmann,Gilles Henri,G. Hermann,Jim Hinton,A. Hoffmann,Werner Hofmann,Petter Hofverberg,M. Holleran,S. Hoppe,Dieter Horns,A. Jacholkowska,O. C. de Jager,C. Jahn,I. Jung,Krzysztof Katarzynski,U. Katz,Sarah Kaufmann,M. Kerschhaggl,D. Khangulyan,B. Khélifi,D. Keogh,D. Klochkov,W. Kluźniak,T. Kneiske,Nu. Komin,K. Kosack,R. Kossakowski,G. Lamanna,J.-P. Lenain,Dirk Lennarz,Thomas Lohse,C.-C. Lu,V. Marandon,A. Marcowith,Julien Masbou,David Maurin,T. J. L. McComb,M. C. Medina,J. Mehault,R. Moderski,E. Moulin,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,K. J. Orford,Michal 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,I. Sushch,M. Sikora,J. L. Skilton,Helene Sol,G. Spengler,Łukasz Stawarz,Riaan Steenkamp,Christian Stegmann,F. Stinzing,Anna Szostek,P. H. Tam,J.-P. Tavernet,Regis Terrier,O. Tibolla,M. Tluczykont,K. Valerius,C. van Eldik,G. Vasileiadis,Christo Venter,J. P. Vialle,Aion Viana,Pascal Vincent,M. Vivier,Heinrich J. Völk,Francesca Volpe,Serguei Vorobiov,Stefan Wagner,Martin Ward,A. A. Zdziarski,A. Zech,H.-S. Zechlin,Y. Fukui,Naoko Furukawa,Akio Ohama,Hidetoshi Sano,Joanne Dawson,Akiko Kawamura +195 more
TL;DR: In this paper, a new very high-energy (VHE; E>100 GeV) γ-ray source, HESSJ1026-582, was discovered with a statistical significance of 7σ.
Journal ArticleDOI
The technical performance of the HEGRA system of imaging air Cherenkov telescopes
Gerd Pühlhofer,O. Bolz,N. Götting,A. Heusler,Dieter Horns,A. Kohnle,H. Lampeitl,M. Panter,M. Tluczykont,Felix Aharonian,A. G. Akhperjanian,M. Beilicke,Konrad Bernlöhr,H. Börst,H. Bojahr,T. Coarasa,Jose Luis Contreras,Juan Cortina,S. Denninghoff,M.V. Fonseca,M. Girma,G. Heinzelmann,G. Hermann,Werner Hofmann,I. Jung,R. Kankanyan,M. Kestel,A. Konopelko,H. Kornmeyer,D. Kranich,Marcos Lopez,E. Lorenz,F. Lucarelli,O. Mang,H. Meyer,R. Mirzoyan,Abelardo Moralejo,E. Ona-Wilhelmi,A. Plyasheshnikov,R. de los Reyes,W. Rhode,J. Ripken,Gavin Rowell,V. Sahakian,M. Samorski,M. Schilling,M. Siems,D. Sobzynska,W. Stamm,V. Vitale,Heinrich J. Völk,C. A. Wiedner,W. Wittek +52 more
TL;DR: In this article, the HEGRA collaboration operated a stereoscopic system of four (later five) imaging atmospheric Cherenkov telescopes, which had an energy threshold of 500 GeV for observations at zenith and under optimum detector conditions.
Journal ArticleDOI
Revealing x-ray and gamma ray temporal and spectral similarities in the GRB 190829A afterglow
Hassan Abdalla,Felix Aharonian,Felix Aharonian,Felix Aharonian,F. Ait Benkhali,E. O. Angüner,C. Arcaro,Celine Armand,Tom Armstrong,H. Ashkar,Michael Backes,Michael Backes,V. Baghmanyan,V. Barbosa Martins,Anna Barnacka,Monica Barnard,Yvonne Becherini,D. Berge,Konrad Bernlöhr,B. Bi,Elisabetta Bissaldi,Elisabetta Bissaldi,Markus Böttcher,Catherine Boisson,J. Bolmont,M. de Bony de Lavergne,Mischa Breuhaus,F. Brun,Pierre Brun,M. Bryan,M. Büchele,Tomasz Bulik,Thomas Bylund,S. Caroff,A. Carosi,Sabrina Casanova,T. Chand,S. Chandra,A. W. Chen,Garret Cotter,M. Curyło,J. Damascene Mbarubucyeye,Isak Delberth Davids,Jim Davies,Christoph Deil,J. Devin,L. Dirson,A. Djannati-Ataï,A. Dmytriiev,Axel Donath,Victor Doroshenko,Lente Dreyer,Christopher J. Duffy,J. Dyks,K. Egberts,F. Eichhorn,Sabrina Einecke,G. Emery,J.-P. Ernenwein,Kirsty Feijen,S. Fegan,A. Fiasson,G. Fichet de Clairfontaine,G. Fontaine,Stefan Funk,M. Füßling,Stefano Gabici,Y. A. Gallant,Gianluca Giavitto,L. Giunti,L. Giunti,D. Glawion,J.F. Glicenstein,M.-H. Grondin,Joachim Hahn,Maria Haupt,G. Hermann,Jim Hinton,Werner Hofmann,Clemens Hoischen,Tim Holch,Markus Holler,M. Hörbe,Dieter Horns,D. Huber,Marek Jamrozy,D. Jankowsky,Felix Jankowsky,Armelle Jardin-Blicq,V. Joshi,I. Jung-Richardt,E. Kasai,M. A. Kastendieck,K. Katarzyński,U. Katz,Dmitry Khangulyan,Bruno Khelifi,Stefan Klepser,Włodek Kluźniak,Nu. Komin,R. Konno,K. Kosack,Dmitriy Kostunin,Michael Kreter,G. Lamanna,A. Lemiere,M. Lemoine-Goumard,J.-P. Lenain,Fabian Leuschner,C. Levy,Thomas Lohse,Iryna Lypova,Jonathan Mackey,Jhilik Majumdar,D. Malyshev,V. Marandon,Paolo Marchegiani,Alexandre Marcowith,Arnaud Mares,G. Martí-Devesa,R. Marx,R. Marx,G. Maurin,P. J. Meintjes,Manuel Meyer,Alison Mitchell,Rafal Moderski,L. Mohrmann,A. Montanari,C. Moore,P. Morris,E. Moulin,J. Muller,Thomas Murach,K. Nakashima,A. Nayerhoda,M. de Naurois,Hambeleleni Ndiyavala,Jacek Niemiec,L. Oakes,P. T. O'Brien,H. Odaka,Stefan Ohm,L. Olivera-Nieto,E. de Ona Wilhelmi,Michal Ostrowski,Sebastian Panny,M. Panter,R. D. Parsons,G. Peron,B. Peyaud,Q. Piel,S. Pita,V. Poireau,A. Priyana Noel,D. A. Prokhorov,H. Prokoph,G. Pühlhofer,Michael Punch,Michael Punch,Andreas Quirrenbach,S. Raab,R. Rauth,P. Reichherzer,A. Reimer,Olaf Reimer,Q. Remy,M. Renaud,Frank M. Rieger,L. Rinchiuso,Carlo Romoli,Gavin Rowell,B. Rudak,E. Ruiz-Velasco,V. Sahakian,S. Sailer,Heiko Salzmann,D. A. Sanchez,Andrea Santangelo,Misao Sasaki,M. Scalici,J. Schäfer,F. Schüssler,Hester Schutte,Ullrich Schwanke,M. Seglar-Arroyo,Mohanraj Senniappan,A. S. Seyffert,N. Shafi,Jimmy N.S. Shapopi,Kleopas Shiningayamwe,Rachel Simoni,A. Sinha,Helene Sol,Andreas Specovius,Samuel Timothy Spencer,M. Spir-Jacob,Łukasz Stawarz,Lei Sun,Riaan Steenkamp,Christian Stegmann,S. Steinmassl,Constantin Steppa,Tadayuki Takahashi,T. Tam,T. Tavernier,A.M. Taylor,Regis Terrier,J. H. E. Thiersen,Domenico Tiziani,M. Tluczykont,Lenka Tomankova,M. Tsirou,R. J. Tuffs,Yasunobu Uchiyama,D. J. van der Walt,C. van Eldik,C. van Rensburg,B. van Soelen,G. Vasileiadis,Johannes Veh,Christo Venter,P. Vincent,Jacco Vink,Heinrich J. Völk,Zorawar Wadiasingh,Stefan Wagner,James E. M. Watson,F. Werner,R. J. White,A. Wierzcholska,Yu Wun Wong,A. Yusafzai,M. Zacharias,M. Zacharias,Roberta Zanin,Davit Zargaryan,Davit Zargaryan,A. A. Zdziarski,A. Zech,Sylvia Zhu,J. Zorn,Samuel Zouari,Natalia Żywucka,P. A. Evans,K. L. Page +245 more
TL;DR: In this paper, the authors reported the detection of very high-energy gamma rays from the afterglow of GRB 190829A, between 4 and 56 hours after the trigger, using the High Energy Stereoscopic System.
Journal ArticleDOI
A multiwavelength view of the flaring state of PKS 2155-304 in 2006
A. Abramowski,Fabio Acero,Felix Aharonian,A. G. Akhperjanian,Gisela Anton,A. Balzer,Anna Barnacka,U. Barres de Almeida,Yvonne Becherini,J. K. Becker,B. Behera,Wystan Benbow,Konrad Bernlöhr,A. Bochow,C. Boisson,J. Bolmont,P. Bordas,Timothé Boutelier,J. Brucker,Francois Brun,Pierre 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,G. Cologna,Pierre Colom,Jan Conrad,N. Coudreau,M. Dalton,M. K. Daniel,Isak Delberth Davids,B. Degrange,Christoph Deil,Hugh Dickinson,A. Djannati-Ataï,W. Domainko,L. O'c. Drury,Franky Dubois,Guillaume Dubus,K. Dutson,J. Dyks,Michal Dyrda,Philip G. Edwards,K. Egberts,Peter Eger,P. Espigat,L. Fallon,C. Farnier,S. J. Fegan,F. Feinstein,M. V. Fernandes,A. Fiasson,Gerard Fontaine,A. Förster,M. Füßling,Y. A. Gallant,Henning Gast,Michael J. Gaylard,L. Gérard,D. Gerbig,B. Giebels,J. F. Glicenstein,B. Glück,P. Goret,D. Göring,S. Häffner,J. D. Hague,Daniel Hampf,M. Hauser,S. Heinz,G. Heinzelmann,Gilles Henri,G. Hermann,Jim Hinton,A. Hoffmann,Werner Hofmann,Petter Hofverberg,Markus Holler,Dieter Horns,A. Jacholkowska,O. C. de Jager,C. Jahn,Marek Jamrozy,I. Jung,M. A. Kastendieck,Krzysztof Katarzynski,U. F. Katz,Sarah Kaufmann,D. Keogh,D. Khangulyan,B. Khélifi,M. Klein,D. Klochkov,W. Kluźniak,T. Kneiske,Nu. Komin,K. Kosack,R. Kossakowski,Petr Kubánek,H. Laffon,G. Lamanna,Dirk Lennarz,J.-P. Lenain,Thomas Lohse,A. Lopatin,C.-C. Lu,V. Marandon,A. Marcowith,J. M. Martin,Julien Masbou,David Maurin,N. Maxted,T. J. L. McComb,M. C. Medina,J. Mehault,G. Melady,N. Nguyen,R. Moderski,B. Monard,E. Moulin,C. L. Naumann,M. Naumann-Godo,M. de Naurois,D. Nedbal,D. Nekrassov,B. Nicholas,Jacek Niemiec,S. J. Nolan,Stefan Ohm,E. de Oña Wilhelmi,B. Opitz,M. Ostrowski,Igor Oya,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,André Schulz,Ullrich Schwanke,S. Schwarzburg,S. Schwemmer,M. Sikora,J. L. Skilton,Helene Sol,G. Spengler,Ł. Stawarz,Riaan Steenkamp,Christian Stegmann,F. Stinzing,K. Stycz,I. Sushch,Anna Szostek,J.-P. Tavernet,Regis Terrier,M. Tluczykont,Anastasios Tzioumis,K. Valerius,C. van Eldik,G. Vasileiadis,Christo Venter,L. Venter,J. P. Vialle,Aion Viana,Pascal Vincent,Heinrich J. Völk,Francesca Volpe,Serguei Vorobiov,M. J. Vorster,Stefan Wagner,Martin Ward,R. White,Alicja Wierzcholska,Michael Zacharias,Anna Zajczyk,A. A. Zdziarski,A. Zech,H.-S. Zechlin +209 more
TL;DR: In this article, the authors used multwavelength observations of the blazar PKS 2155-304 during two weeks in July and August 2006, the period when two exceptional flares at very high energies (VHE, E>= 100 GeV) occurred, provide a detailed picture of the evolution of its emission.