The energy spectrum of cosmic-ray electrons at TeV energies Author(s): Aharonian F., Bazer-Bachi A.R., Becherini Y., Boisson C., Borrel V., Brion E., Brun P., Boutelier T., Charbonnier A., Chounet L.-M., Coignet G., Degrange B., Djannati-Ataï A., Dubois F., Dubus G., Espigat P., Farnier C., Feinstein F., Fiasson A., Fontaine G., Gallant Y., Gérard L., Giebels B., Glicenstein J.F., Goret P., Henri G., Jacholkowska A., Komin Nukri, Marcowith A., Vasileiadis G. (Article) Published: Physical Review Letters, vol. 101 p.261104 (2008) Links openAccess full text : Ref HAL: in2p3-00341406_v1 Ref Arxiv: 0811.3894 DOI: 10.1103/PhysRevLett.101.261104 Ref. & Cit.: NASA ADS Exporter : BibTex | endNote 465 citations 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. Comments: 5 pages, 3 figures. Accepted for publication by Phys. Rev. Letters; modified to include latest ATIC data points |