A
A. Zech
Researcher at University of Paris
Publications - 293
Citations - 16735
A. Zech is an academic researcher from University of Paris. The author has contributed to research in topics: High Energy Stereoscopic System & Blazar. The author has an hindex of 60, co-authored 253 publications receiving 15068 citations. Previous affiliations of A. Zech include Janssen Pharmaceutica & Paris Diderot University.
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Journal ArticleDOI
Correlation of the highest-energy cosmic rays with nearby extragalactic objects.
J. Abraham,P. Abreu,Marco Aglietta,C. Aguirre,D. Allard,I. Allekotte,J. Allen,Patrick Allison,C. Alvarez,Jaime Alvarez-Muñiz,M. Ambrosio,Luis A. Anchordoqui,Luis A. Anchordoqui,Sofia Andringa,A. Anzalone,Carla Aramo,Stefano Argiro,K. Arisaka,E. Armengaud,F. Arneodo,F. Arqueros,T. Asch,Hernán Gonzalo Asorey,Pedro Assis,B. S. Atulugama,Julien Aublin,M. Ave,G. Avila,T. Bäcker,Daniel Omar Badagnani,A. F. Barbosa,D. Barnhill,S. L.C. Barroso,Pablo M. Bauleo,J. J. Beatty,Tristan Beau,B. R. Becker,K.-H. Becker,Jose A. Bellido,Segev BenZvi,Corinne Berat,T. Bergmann,P. Bernardini,Xavier Bertou,Peter L. Biermann,Pierre Billoir,O. Blanch-Bigas,Francisco J. Blanco,P. Blasi,C. Bleve,H. Blümer,Martina Bohacova,Carla Bonifazi,R. Bonino,M. Boratav,Jeffrey Brack,Pedro Brogueira,W. C. Brown,Peter Buchholz,Antonio Bueno,N. Busca,Karen S. Caballero-Mora,Bei Cai,D. V. Camin,Rossella Caruso,Wagner Carvalho,Antonella Castellina,Onofrio A. Catalano,G. Cataldi,L. Cazon-Boado,R. Cester,J. Chauvin,A. Chiavassa,Jose Chinellato,A. Chou,A. Chou,J. Chye,P. Clark,Roger W Clay,E. Colombo,Rúben Conceição,B.M. Connolly,Fernando Contreras,J. Coppens,A. Cordier,U. Cotti,S. Coutu,Corbin Covault,A. Creusot,J. W. Cronin,S. Dagoret-Campagne,Kai Daumiller,Bruce R. Dawson,R. M. de Almeida,C. De Donato,S. J. De Jong,G. De La Vega,W. J. M. de Mello Junior,J. R. T. de Mello Neto,I. De Mitri,V. de Souza,L. del Peral,Olivier Deligny,A. Della Selva,C. Delle Fratte,H. Dembinski,C. Di Giulio,J. C. Diaz,Carola Dobrigkeit,Juan Carlos D'Olivo,D. Dornic,A. Dorofeev,J. C. dos Anjos,M. T. Dova,D. D'Urso,Michael DuVernois,Ralph Engel,Luis N. Epele,Martin Erdmann,Carlos Escobar,A. Etchegoyen,P. Facal San Luis,Heino Falcke,G. Farrar,A. C. Fauth,N. Fazzini,A. Fernandez,Francesc Ferrer,S. Ferry,Brian Fick,Alberto Filevich,A. Filipčič,Ivor Fleck,R. Fonte,C. E. Fracchiolla,W. Fulgione,B. García,D. García Gámez,D. Garcia-Pinto,X. Garrido,Heiko Geenen,Graciela B. Gelmini,H. Gemmeke,P. L. Ghia,M. Giller,Henry Glass,M. S. Gold,G. Golup,F. Gomez Albarracin,M. Gómez Berisso,R. Gómez Herrero,Paulo J. S. Gonçalves,M. Gonçalves do Amaral,Daniel Gonzalez,J. G. Gonzalez,M. González,Dariusz Gora,Dariusz Gora,A. Gorgi,P. Gouffon,V. Grassi,A. A. Grillo,C. Grunfeld,Y. Guardincerri,F. Guarino,G. P. Guedes,J. Gutiérrez,J. D. Hague,Jean Christophe Hamilton,Peter Hansen,D. Harari,S. Harmsma,J. L. Harton,J. L. Harton,A. Haungs,T. Hauschildt,M. D. Healy,Thomas Hebbeker,D. Heck,C. Hojvat,V. C. Holmes,Piotr Homola,Jörg R. Hörandel,A. Horneffer,M. Horvat,M. Hrabovsky,Tim Huege,Marco Iarlori,A. Insolia,F. Ionita,A. Italiano,M. Kaducak,Karl-Heinz Kampert,B. Keilhauer,E. Kemp,R. M. Kieckhafer,H.O. Klages,M. Kleifges,J. Kleinfeller,R. Knapik,J. Knapp,D. H. Koang,Andreas Kopmann,A. Krieger,O. Krömer,Daniel Kümpel,N. Kunka,Alexander Kusenko,G. La Rosa,C. Lachaud,B. L. Lago,D. Lebrun,P. Le Brun,John K. Lee,M. A. Leigui de Oliveira,A. Letessier-Selvon,Matthias Leuthold,I. Lhenry-Yvon,R. López,A. Lopez Agüera,J. Lozano Bahilo,Maria Concetta Maccarone,C. Macolino,S. Maldera,Magdalena Malek,G. Mancarella,M. E. Mancenido,Dusan Mandat,P. Mantsch,A. G. Mariazzi,Ioana Codrina Maris,D. Martello,José Eduardo Martinez,O. Martínez Bravo,H. J. Mathes,John Matthews,John Matthews,J. A.J. Matthews,G. Matthiae,D. Maurizio,P.O. Mazur,Thomas McCauley,M. Mcewen,R. R. McNeil,M. C. Medina,G. Medina-Tanco,A. Meli,D. Melo,E. Menichetti,A. Menschikov,C. Meurer,R. Meyhandan,M. I. Micheletti,Gennaro Miele,Warner A. Miller,Silvia Mollerach,M. Monasor,M. Monasor,D. Monnier Ragaigne,François Montanet,B. Morales,C. Morello,E. Moreno,Juan Moreno,Christopher Morris,Miguel Mostafa,Marcio Aparecido Muller,R. Mussa,G. Navarra,J. L. Navarro,S. Sánchez Navas,L. Nellen,Catherine Newman-Holmes,D. Newton,D. Newton,T. Nguyen Thi,N. Nierstenhöfer,D. Nitz,D. Nosek,L. Nozka,J. Oehlschläger,T. Ohnuki,Angela V. Olinto,V. M. Olmos-Gilbaja,M.E. Ortiz,S. Ostapchenko,L. Otero,D. Pakk Selmi-Dei,M. Palatka,Johanna A. Pallotta,G. Parente,E. Parizot,S. Parlati,Sergio Pastor,M. Patel,T. Paul,Vasiliki Pavlidou,K. Payet,Miroslav Pech,J. Pçkala,Rodrigo Pelayo,Iuri Muniz Pepe,L. Perrone,S. Petrera,P. Petrinca,Y. Petrov,DiepPham Ngoc,DongPham Ngoc,T. N. Pham Thi,A. Pichel,R. Piegaia,T. Pierog,M. Pimenta,T. Pinto,V. Pirronello,Ofelia Pisanti,M. Platino,J. Pochon,T. A. Porter,Paolo Privitera,Michael Prouza,E. J. Quel,J. Rautenberg,S. Reucroft,B. Revenu,F. A. S. Rezende,J. Rídky,S. Riggi,Markus Risse,Colas Rivière,Vincenzo Rizi,M. Roberts,C. Robledo,G. Rodriguez,D. Rodríguez Frías,J. Rodríguez Martino,J. Rodriguez Rojo,I. Rodriguez-Cabo,German Ros,German Ros,Jaime Rosado,Markus Roth,B. Rouillé-d'Orfeuil,Esteban Roulet,A. C. Rovero,F. Salamida,Humberto Ibarguen Salazar,G. Salina,F. Sánchez,Marcos Santander,C. E. Santo,E. M. Santos,F. Sarazin,Subir Sarkar,R. Sato,V. Scherini,H. Schieler,Fabian Schmidt,T. Schmidt,Olaf Scholten,Petr Schovanek,F. Schüssler,S. J. Sciutto,Mario Scuderi,A. Segreto,D.V. Semikoz,Mariangela Settimo,R. C. Shellard,Iván Sidelnik,Beatriz B. Siffert,Günter Sigl,N. Smetniansky De Grande,A. Smialkowski,Radomir Smida,A. G. K. Smith,B. E. Smith,Gregory R Snow,Pierre Sokolsky,Paul Sommers,J. Sorokin,H. M. Spinka,H. M. Spinka,R. Squartini,E. Strazzeri,A. Stutz,Federico Suarez,T. Suomijärvi,A. D. Supanitsky,M. S. Sutherland,J. D. Swain,Z. Szadkowski,J. Takahashi,A. Tamashiro,A. Tamburro,O. Tascau,R. Tcaciuc,D. Thomas,R. Ticona,Javier Tiffenberg,Charles Timmermans,W. Tkaczyk,C. J. Todero Peixoto,B. Tome,A. Tonachini,D. Torresi,Petr Travnicek,A. K. Tripathi,G. Tristram,D. Tscherniakhovski,Matias Tueros,V. Tunnicliffe,Ralf Ulrich,M. Unger,M. Urban,J. F. Valdés Galicia,I. Valiño,L. Valore,A.M. van den Berg,V. Van Elewyck,R. A. Vázquez,Darko Veberič,Alejandro Luis Veiga,Antonio Velarde,Tonia M. Venters,V. Verzi,M. Videla,L. Villaseñor,Serguei Vorobiov,L. Voyvodic,Hernan Wahlberg,O. Wainberg,T. Waldenmaier,P. Walker,D. Warner,Alan Watson,S. Westerhoff,G. Wieczorek,L. R. Wiencke,B. Wilczynska,H. Wilczyński,C. Wileman,M. G. Winnick,H. Wu,B. Wundheiler,J. Xu,T. Yamamoto,P. Younk,Enrique Zas,D. Zavrtanik,M. Zavrtanik,A. Zech,A. Zepeda,M. Ziolkowski +452 more
TL;DR: In this article, the authors demonstrate that there is a correlation between the arrival directions of cosmic rays with energy above 6 x 10{sup 19} eV and the positions of active galactic nuclei lying within 75 Mpc.
Journal ArticleDOI
First observation of the Greisen-Zatsepin-Kuzmin suppression.
Rasha Abbasi,Tareq Abu-Zayyad,M. Allen,J. F. Amman,G. Archbold,Konstantin Belov,John Belz,S. Y. Ben Zvi,Douglas Bergman,S. A. Blake,O. A. Brusova,G. W. Burt,C. Cannon,Z. Cao,B. C. Connolly,W. Deng,Y. Fedorova,C. B. Finley,R. C. Gray,William Hanlon,C. M. Hoffman,Michael H. Holzscheiter,Gareth Hughes,P. Hüntemeyer,B. F. Jones,C. C. H. Jui,K. Kim,M. A. Kirn,E. C. Loh,M. M. Maestas,N. Manago,L. J. Marek,K. Martens,John Matthews,John N. Matthews,S. A. Moore,A. O’Neill,C. A. Painter,L. Perera,Kevin Reil,R. Riehle,M. D. Roberts,D. Rodriguez,Naruo Sasaki,Steve Schnetzer,L. M. Scott,G. Sinnis,J. D. Smith,Pierre Sokolsky,C. Song,R. W. Springer,B. T. Stokes,S. B. Thomas,J. R. Thomas,Gordon Thomson,Dale Tupa,S. Westerhoff,Lawrence Wiencke,Xiang Zhang,A. Zech +59 more
TL;DR: High Resolution Fly's Eye's measurement of the flux of ultrahigh energy cosmic rays shows a sharp suppression at an energy of 6 x 10(19) eV, consistent with the expected cutoff energy.
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
Acceleration of petaelectronvolt protons in the Galactic Centre
A. Abramowski,Felix Aharonian,Faical Ait Benkhali,A. G. Akhperjanian,E. O. Anguener,Michael Backes,A. Balzer,Yvonne Becherini,J. Becker Tjus,David Berge,S. Bernhard,K. Bernloehr,E. Birsin,R. Blackwell,Markus Boettcher,Catherine Boisson,J. Bolmont,Pol Bordas Coma,Johan Bregeon,Francois Brun,Pierre Brun,M. Bryan,Tomasz Bulik,J. Carr,Sabrina Casanova,Nachiketa Chakraborty,R. Chalme-Calvet,R. C. G. Chaves,A. W. Chen,M. Chrétien,S. Colafrancesco,G. Cologna,Jan Conrad,C. Couturier,Y. Cui,I. D. Davids,B. Degrange,Christoph Deil,P. deWilt,A. Djannati-Ata,W. Domainko,Axel Donath,L. O'c. Drury,Guillaume Dubus,K. Dutson,J. Dyks,M. Dyrda,Tanya Edwards,K. Egberts,Peter Eger,J.-P. Ernenwein,P. Espigat,C. Farnier,S. J. Fegan,F. Feinstein,M. V. Fernandes,D. Fernandez,A. Fiasson,G. Fontaine,A. Förster,M. Fuessling,Stefano Gabici,M. Gajdus,Y. A. Gallant,T. Garrigoux,Gianluca Giavitto,B. Giebels,J. F. Glicenstein,D. Gottschall,Arti Goyal,M. H. Grondin,M. Grudzińska,D. Hadasch,S. Haeffner,Joachim Hahn,J. Hawkes,G. Heinzelmann,Gilles Henri,G. Hermann,O. Hervet,Andreas Hillert,Jim Hinton,Werner Hofmann,Petter Hofverberg,Clemens Hoischen,M. Holler,Dieter Horns,A. Ivascenko,A. Jacholkowska,Marek Jamrozy,M. Janiak,Felix Jankowsky,I. Jung-Richardt,M. A. Kastendieck,K. Katarzyński,Uli Katz,D. Kerszberg,Bruno Khelifi,M. Kieffer,S. Klepser,D. Klochkov,W. Kluzniak,D. Kolitzus,Nu. Komin,K. Kosack,S. Krakau,F. Krayzel,P. P. Krueger,H. Laffon,G. Lamanna,J. Lau,J. Lefaucheur,V. Lefranc,A. Lemiere,M. Lemoine-Goumard,J-P. Lenain,Thomas Lohse,A. Lopatin,C-C Lu,R. Lui,Vincent Marandon,Alexandre Marcowith,C. Mariaud,Ramin Marx,Gilles Maurin,N. Maxted,M. Mayer,P. J. Meintjes,U. Menzler,Manuel Meyer,Alison Mitchell,Rafał Moderski,M. Mohamed,K. Morå,Emmanuel Moulin,Thomas Murach,M. de Naurois,Jacek Niemiec,L. Oakes,H. Odaka,S. Oettl,Stefan Ohm,B. Opitz,Michał Ostrowski,Igor Oya,M. Panter,R. D. Parsons,M. Paz Arribas,N. W. Pekeur,Guy Pelletier,P-O. Petrucci,B. Peyaud,Santiago Pita,Helen Poon,Heike Prokoph,G. Puehlhofer,Michael Punch,Andreas Quirrenbach,S. Raab,I. Reichardt,A. Reimer,Olaf Reimer,M. Renaud,Raquel de los Reyes,Frank M. Rieger,C. Romoli,S. Rosier-Lees,Gavin Rowell,B. Rudak,C. B. Rulten,V. Sahakian,David Salek,David Sánchez,Andrea Santangelo,Manami Sasaki,Reinhard Schlickeiser,F. Schuessler,André Schulz,Ullrich Schwanke,S. Schwemmer,A. S. Seyffert,Rachel Simoni,Helene Sol,Felix Spanier,G. Spengler,F. Spies,Lukasz Stawarz,R. Steenkamp,Christian Stegmann,F. Stinzing,K. Stycz,I. Sushch,J.-P. Tavernet,T. Tavernier,Andrew M. Taylor,Regis Terrier,M. Tluczykont,C. Trichard,Richard J. Tuffs,K. Valerius,J.L. Van der Walt,C. van Eldik,B. van Soelen,G. Vasileiadis,J. Veh,Christo Venter,Aion Viana,P. Vincent,Jacco Vink,F. Voisin,H. J. Voelk,Thomas Vuillaume,Stefan Wagner,P. Wagner,Robert Wagner,Matthias Weidinger,Quirin Weitzel,R. White,Alicja Wierzcholska,P. Willmann,A. Woernlein,Denis Wouters,Ruizhi Yang,Victor Zabalza,D. Zaborov,Michael Zacharias,Andrzej A. Zdziarski,A. Zech,F. Zefi,N. Zywucka +229 more
TL;DR: Deep γ-ray observations with arcminute angular resolution of the region surrounding the Galactic Centre are reported, which show the expected tracer of the presence of petaelectronvolt protons within the central 10 parsecs of the Galaxy, and it is proposed that the supermassive black hole Sagittarius A* is linked to this PeVatron.