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The energy spectrum of cosmic-ray electrons at TeV energies

F. Aharonian A.G. Akhperjanian U. Barres de Almeida A.R. Bazer-Bachi 1 Y. Becherini 2 B. Behera W. Benbow K. Bernlöhr C. Boisson 3 A. Bochow V. Borrel 1 I. Braun E. Brion 4 J. Brucker P. Brun 4 R. Bühler T. Bulik I. Büsching T. Boutelier 5 S. Carrigan P.M. Chadwick A. Charbonnier 6 R.C.G. Chaves A. Cheesebrough L.-M. Chounet 7 A.C. Clapson G. Coignet 8 L. Costamante M. Dalton B. Degrange 7 C. Deil H.J. Dickinson A. Djannati-Ataï 9 W. Domainko L.O'C. Drury F. Dubois 8 G. Dubus 5 J. Dyks M. Dyrda K. Egberts D. Emmanoulopoulos P. Espigat 2 C. Farnier 10 F. Feinstein 10 A. Fiasson 10 A. Förster G. Fontaine 7 M. Füsling S. Gabici Y.A. Gallant 10 L. Gérard 2 B. Giebels 7 J.F. Glicenstein 4 B. Glück P. Goret 4 C. Hadjichristidis D. Hauser M. Hauser S. Heinz G. Heinzelmann G. Henri 5 G. Hermann J.A. Hinton A. Hoffmann W. Hofmann M. Holleran S. Hoppe D. Horns A. Jacholkowska 6 O.C. de Jager I. Jung K. Katarzy'Nski S. Kaufmann E. Kendziorra M. Kerschhaggl D. Khangulyan B. Khélifi 7 D. Keogh Nu. Komin 10 K. Kosack G. Lamanna 8 J.-P. Lenain 3 T. Lohse V. Marandon 2 J.M. Martin 3 O. Martineau-Huynh 6 A. Marcowith 10 D. Maurin 6 T.J.L. Mccomb C. Medina 3 R. Moderski Emmanuel Moulin 4 M. Naumann-Godo 7 M. de Naurois 6 D. Nedbal D. Nekrassov J. Niemiec S.J. Nolan S. Ohm J.-F. Olive 1 E. de Oña Wilhelmi 2 K.J. Orford J.L. Osborne M. Ostrowski M. Panter G. Pedaletti G. Pelletier 5 P.-O. Petrucci 5 S. Pita 2 G. P¨uhlhofer M. Punch 2 A. Quirrenbach B.C. Raubenheimer M. Raue S.M. Rayner M. Renaud F. Rieger J. Ripken L. Rob S. Rosier-Lees 8 G. Rowell B. Rudak C.B. Rulten J. Ruppel V. Sahakian A. Santangelo R. Schlickeiser F.M. Schöck R. Schröder U. Schwanke S. Schwarzburg S. Schwemmer A. Shalchi J.L. Skilton H. Sol 3 D. Spangler L. Stawarz R. Steenkamp C. Stegmann G. Superina 7 P.H. Tam J.-P. Tavernet 6 R. Terrier 2 O. Tibolla C. van Eldik G. Vasileiadis 10 C. Venter J.P. Vialle 8 P. Vincent 6 M. Vivier 4 H.J. Völk F. Volpe 7 S.J. Wagner M. Ward A.A. Zdziarski A. Zech 3
Abstract : The very large collection area of ground-based gamma-ray telescopes gives them a substantial advantage over balloon/satellite based instruments in the detection of very-high-energy (>600 GeV) cosmic-ray electrons. Here we present the electron spectrum derived from data taken with the H.E.S.S. system of imaging atmospheric Cherenkov telescopes. In this measurement, the first of this type, we are able to extend the measurement of the electron spectrum beyond the range accessible to direct measurements. We find evidence for a substantial steepening in the energy spectrum above 600 GeV compared to lower energies.
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Submitted on : Tuesday, November 25, 2008 - 3:41:35 PM
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F. Aharonian, A.G. Akhperjanian, U. Barres de Almeida, A.R. Bazer-Bachi, Y. Becherini, et al.. The energy spectrum of cosmic-ray electrons at TeV energies. Physical Review Letters, American Physical Society, 2008, 101, pp.261104. ⟨10.1103/PhysRevLett.101.261104⟩. ⟨in2p3-00341406⟩

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