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Searches for cosmic-ray electron anisotropies with the Fermi Large Area Telescope

  • M. Ackermann
  • , M. Ajello
  • , W. B. Atwood
  • , L. Baldini
  • , J. Ballet
  • , G. Barbiellini
  • , D. Bastieri
  • , K. Bechtol
  • , R. Bellazzini
  • , B. Berenji
  • , E. D. Bloom
  • , E. Bonamente
  • , A. W. Borgland
  • , A. Bouvier
  • , J. Bregeon
  • , A. Brez
  • , M. Brigida
  • , P. Bruel
  • , R. Buehler
  • , T. H. Burnett
  • S. Buson, G. A. Caliandro, R. A. Cameron, P. A. Caraveo, S. Carrigan, J. M. Casandjian, C. Cecchi, Ö Çelik, E. Charles, A. Chekhtman, C. C. Cheung, J. Chiang, S. Ciprini, R. Claus, J. Cohen-Tanugi, J. Conrad, A. Cuoco, C. D. Dermer, A. De Angelis, F. De Palma, S. W. Digel, G. Di Bernardo, E. Do Couto E Silva, P. S. Drell, R. Dubois, C. Favuzzi, S. J. Fegan, W. B. Focke, M. Frailis, Y. Fukazawa, S. Funk, P. Fusco, D. Gaggero, F. Gargano, S. Germani, N. Giglietto, P. Giommi, F. Giordano, M. Giroletti, T. Glanzman, G. Godfrey, D. Grasso, I. A. Grenier, J. E. Grove, S. Guiriec, M. Gustafsson, D. Hadasch, A. K. Harding, K. Hayashi, E. Hays, R. E. Hughes, G. Jóhannesson, A. S. Johnson, W. N. Johnson, T. Kamae, H. Katagiri, J. Kataoka, M. Kerr, J. Knödlseder, M. Kuss, J. Lande, L. Latronico, S. H. Lee, M. Lemoine-Goumard, M. Llena Garde, F. Longo, F. Loparco, M. N. Lovellette, P. Lubrano, A. Makeev, M. N. Mazziotta, J. E. McEnery, J. Mehault, P. F. Michelson, T. Mizuno, A. A. Moiseev, C. Monte, M. E. Monzani, E. Moretti, A. Morselli, I. V. Moskalenko, S. Murgia, T. Nakamori, M. Naumann-Godo, P. L. Nolan, E. Nuss, T. Ohsugi, A. Okumura, N. Omodei, E. Orlando, J. F. Ormes, D. Paneque, J. H. Panetta, D. Parent, V. Pelassa, M. Pepe, M. Pesce-Rollins, F. Piron, T. A. Porter, S. Profumo, S. Rainò, R. Rando, M. Razzano, A. Reimer, O. Reimer, T. Reposeur, J. Ripken, S. Ritz, M. Roth, H. F.W. Sadrozinski, A. Sander, T. L. Schalk, C. Sgrò, J. Siegal-Gaskins, E. J. Siskind, D. A. Smith, P. D. Smith, G. Spandre, P. Spinelli, M. S. Strickman, A. W. Strong, D. J. Suson, H. Takahashi, T. Takahashi, T. Tanaka, J. B. Thayer, J. G. Thayer, D. J. Thompson, L. Tibaldo, D. F. Torres, G. Tosti, A. Tramacere, Y. Uchiyama, T. L. Usher, J. Vandenbroucke, V. Vasileiou, N. Vilchez, V. Vitale, A. P. Waite, P. Wang, B. L. Winer, K. S. Wood, Z. Yang, T. Ylinen, G. Zaharijas, M. Ziegler
  • Kavli Institute for Particle Astrophysics and Cosmology
  • University of California at Santa Cruz
  • Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
  • Universite Paris-Saclay
  • INFN Sezione di Trieste
  • University of Trieste
  • INFN
  • University of Padova
  • INFN Sezione di Perugia
  • University of Perugia
  • Politecnico di Bari
  • INFN Sezione di Bari
  • University of Washington
  • Campus UAB
  • INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Milan
  • NASA Goddard Space Flight Center
  • Biochemical and Environmental Engineering
  • Naval Research Laboratory
  • George Mason University
  • National Research Council
  • Laboratoire Univers et Particules de Montpellier
  • Stockholm University
  • Oskar Klein Centre
  • K. A. Wallenberg Foundation
  • and Physics University of Udine
  • INAF-Trieste
  • Hiroshima University
  • Science and Research Directorate
  • INAF Istituto di Radioastronomia
  • Center for Space Plasma and Aeronomic Research
  • The Ohio State University
  • Waseda University
  • CNRS
  • Univ. Bordeaux
  • University of Maryland
  • KTH Royal Institute of Technology
  • INFN Roma Tor Vergata
  • ISAS/JAXA
  • Max Planck Institut für Extraterrestrische Physik
  • University of Denver
  • Medical University of Innsbruck
  • NYCB Real-Time Computing Inc.
  • Purdue University Northwest
  • Astroparticle Physics (IDAPP) Program
  • Pompeu Fabra University (UPF)
  • Consorzio Interuniversitario per la Fisica Spaziale (CIFS)
  • University of Geneva
  • University of Rome “Tor Vergata”
  • University of Kalmar
  • Institut Pierre Simon Laplace, CNRS and CEA

Résultats de recherche: Contribution à un journalArticleRevue par des pairs

Résumé

The Large Area Telescope on board the Fermi satellite (Fermi LAT) detected more than 1.6×106 cosmic-ray electrons/positrons with energies above 60 GeV during its first year of operation. The arrival directions of these events were searched for anisotropies of angular scale extending from 10°up to 90°, and of minimum energy extending from 60 GeV up to 480 GeV. Two independent techniques were used to search for anisotropies, both resulting in null results. Upper limits on the degree of the anisotropy were set that depended on the analyzed energy range and on the anisotropy's angular scale. The upper limits for a dipole anisotropy ranged from 0.5% to 10%.

langue originaleAnglais
Numéro d'article092003
journalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume82
Numéro de publication9
Les DOIs
étatPublié - 18 nov. 2010

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