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

Ackermann M, Ajello M, Atwood WB, Baldini L, Ballet J, Barbiellini G, Bastieri D, Bechtol K, Bellazzini R, Berenji B, Bloom ED, Bonamente E, Borgland AW, Bouvier A, Bregeon J, Brez A, Brigida M, Bruel P, Buehler R, Burnett TH, Buson S, Caliandro GA, Cameron RA, Caraveo PA, Carrigan S, Casandjian JM, Cecchi C, Celik O, Charles E, Chekhtman A, Cheung CC, Chiang J, Ciprini S, Claus R, Cohen-Tanugi J, Conrad J, Cuoco A, Dermer CD, De Angelis A, De Palma F, Digel SW, Di Bernardo G, Do Couto E Silva E, Drell PS, Dubois R, Favuzzi C, Fegan SJ, Focke WB, Frailis M, Fukazawa Y, Funk S, Fusco P, Gaggero D, Gargano F, Germani S, Giglietto N, Giommi P, Giordano F, Giroletti M, Glanzman T, Godfrey G, Grasso D, Grenier IA, Grove JE, Guiriec S, Gustafsson M, Hadasch D, Harding AK, Hayashi K, Hays E, Hughes RE, Johannesson G, Johnson AS, Johnson WN, Kamae T, Katagiri H, Kataoka J, Kerr M, Knoedlseder J, Kuss MW, Lande J, Latronico L, Lee SH, Lemoine-Goumard M, Garde ML, Longo F, Loparco F, Lovellette MN, Lubrano P, Makeev A, Mazziotta MN, Mcenery JE, Mehault J, Michelson PF, Mizuno T, Moiseev AA, Monte C, Monzani ME, Moretti E, Morselli A, Moskalenko IV, Murgia S, Nakamori T, Naumann-Godo M, Nolan PL, Nuss E, Ohsugi T, Okumura A, Omodei N, Orlando E, Ormes JF, Paneque D, Panetta JH, Parent D, Pelassa V, Pepe M, Pesce-Rollins M, Piron F, Porter TA, Profumo S, Raino S, Rando R, Razzano M, Reimer A, Reimer O, Reposeur T, Ripken J, Ritz S, Roth M, Sadrozinski HFW, Sander A, Schalk TL, Sgro C, Siegal-Gaskins J, Siskind EJ, Smith DA, Smith PD, Spandre G, Spinelli P, Strickman MS, Strong AW, Suson DJ, Takahashi HH, Takahashi T, Tanaka T, Thayer JB, Thayer JG, Thompson DJ, Tibaldo L, Torres DF, Tosti G, Tramacere A, Uchiyama Y, Usher TL, Vandenbroucke J, Vasileiou V, Vilchez N, Vitale V, Waite AP, Wang P, Winer BL, Wood KS, Yang Z, Ylinen T, Zaharijas G, Ziegler M (2010)

Publication Type: Journal article

Publication year: 2010

Journal

Book Volume: 82

Journal Issue: 9

DOI: 10.1103/PhysRevD.82.092003

Abstract

The Large Area Telescope on board the Fermi satellite (Fermi LAT) detected more than 1.6 x 10(6) 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 similar to 10 degrees up to 90 degrees, 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 similar to 0.5% to similar to 10%.

Authors with CRIS profile

Involved external institutions

Stanford University United States (USA) (US) University of California Santa Cruz United States (USA) (US) National Institute for Nuclear Physics / Istituto Nazionale di Fisica Nucleare (INFN) Italy (IT) University of Paris 7 - Denis Diderot / Université Paris VII Denis Diderot France (FR) Politecnico di Bari Italy (IT) École Polytechnique - Université Paris-Saclay France (FR) University of Washington United States (USA) (US) Institut d'Estudis Espacials de Catalunya (IEEC) Spain (ES) National Institute for Astrophysics / Istituto Nazionale Astrofisica (INAF) Italy (IT) University of Padua / Universita degli Studi di Padova Italy (IT) National Aeronautics and Space Administration (NASA) United States (USA) (US) U.S. Naval Research Laboratory United States (USA) (US) Università degli Studi di Perugia Italy (IT) University of Montpellier / Université Montpellier France (FR) Stockholm University / Stockholms universitet Sweden (SE) AlbaNova University Centre / Kungliga Tekniska Högskolan AlbaNova Universitetscentrum Sweden (SE) University of Udine / Università degli Studi di Udine Italy (IT) Hiroshima University Japan (JP) Italian Space Agency / Agenzia Spaziale Italiana (ASI) Italy (IT) University of Alabama in Huntsville (UAH) United States (USA) (US) Ohio State University United States (USA) (US) Waseda University / 早稲田大学 Japan (JP) Université Toulouse III - Paul Sabatier France (FR) Université Bordeaux 1, Sciences et Technologies France (FR) Japan Aerospace eXploration Agency (JAXA) Japan (JP) Max-Planck-Institut für extraterrestrische Physik (MPE) / Max Planck Institute for Extraterrestrial Physics Germany (DE) University of Denver United States (USA) (US) NYCB Real-Time Computing, Inc. United States (USA) (US) Purdue University Northwest / Purdue University Calumet United States (USA) (US)

How to cite

APA:

Ackermann, M., Ajello, M., Atwood, W.B., Baldini, L., Ballet, J., Barbiellini, G.,... Ziegler, M. (2010). Searches for cosmic-ray electron anisotropies with the Fermi Large Area Telescope. Physical Review D, 82(9). https://doi.org/10.1103/PhysRevD.82.092003

MLA:

Ackermann, Markus, et al. "Searches for cosmic-ray electron anisotropies with the Fermi Large Area Telescope." Physical Review D 82.9 (2010).

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