Measurement of the Cosmic Ray e⁺+e^- Spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope

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A. A. Abdo^1,2, M. Ackermann³, M. Ajello³, W. B. Atwood⁴, M. Axelsson^5,6, L. Baldini⁷, J. Ballet⁸, G. Barbiellini^9,10, D. Bastieri^11,12, M. Battelino^5,13, B. M. Baughman¹⁴, K. Bechtol³, R. Bellazzini⁷, B. Berenji³, R. D. Blandford³, E. D. Bloom³, G. Bogaert¹⁵, E. Bonamente^16,17, A. W. Borgland³, J. Bregeon⁷, A. Brez⁷, M. Brigida^18,19, P. Bruel¹⁵, T. H. Burnett²⁰, G. A. Caliandro^18,19, R. A. Cameron³, P. A. Caraveo²¹, P. Carlson^5,13, J. M. Casandjian⁸, C. Cecchi^16,17, E. Charles³, A. Chekhtman^22,2, C. C. Cheung²³, J. Chiang³, S. Ciprini^16,17, R. Claus³, J. Cohen-Tanugi²⁴, L. R. Cominsky²⁵, J. Conrad^5,13,26,27, S. Cutini²⁸, C. D. Dermer², A. de Angelis²⁹, F. de Palma^18,19, S. W. Digel³, G. Di Bernardo⁷, E. do Couto e Silva³, P. S. Drell³, R. Dubois³, D. Dumora^30,31, Y. Edmonds³, C. Farnier²⁴, C. Favuzzi^18,19, W. B. Focke³, M. Frailis²⁹, Y. Fukazawa³², S. Funk³, P. Fusco^18,19, D. Gaggero⁷, F. Gargano¹⁹, D. Gasparrini²⁸, N. Gehrels^23,33, S. Germani^16,17, B. Giebels¹⁵, N. Giglietto^18,19, F. Giordano^18,19, T. Glanzman³, G. Godfrey³, D. Grasso⁷, I. A. Grenier⁸, M.-H. Grondin^30,31, J. E. Grove², L. Guillemot^30,31, S. Guiriec³⁴, Y. Hanabata³², A. K. Harding²³, R. C. Hartman²³, M. Hayashida³, E. Hays²³, R. E. Hughes¹⁴, G. Jóhannesson³, A. S. Johnson³, R. P. Johnson⁴, W. N. Johnson², T. Kamae³, H. Katagiri³², J. Kataoka³⁵, N. Kawai^36,37, M. Kerr²⁰, J. Knödlseder³⁸, D. Kocevski³, F. Kuehn¹⁴, M. Kuss⁷, J. Lande³, L. Latronico^7,*, M. Lemoine-Goumard^30,31, F. Longo^9,10, F. Loparco^18,19, B. Lott^30,31, M. N. Lovellette², P. Lubrano^16,17, G. M. Madejski³, A. Makeev^22,2, M. M. Massai⁷, M. N. Mazziotta¹⁹, W. McConville^23,33, J. E. McEnery²³, C. Meurer^5,26, P. F. Michelson³, W. Mitthumsiri³, T. Mizuno³², A. A. Moiseev^39,33,†, C. Monte^18,19, M. E. Monzani³, E. Moretti^9,10, A. Morselli⁴⁰, I. V. Moskalenko³, S. Murgia³, P. L. Nolan³, J. P. Norris⁴¹, E. Nuss²⁴, T. Ohsugi³², N. Omodei⁷, E. Orlando⁴², J. F. Ormes⁴¹, M. Ozaki⁴³, D. Paneque³, J. H. Panetta³, D. Parent^30,31, V. Pelassa²⁴, M. Pepe^16,17, M. Pesce-Rollins⁷, F. Piron²⁴, M. Pohl⁴⁴, T. A. Porter⁴, S. Profumo⁴, S. Rainò^18,19, R. Rando^11,12, M. Razzano⁷, A. Reimer³, O. Reimer³, T. Reposeur^30,31, S. Ritz^23,33, L. S. Rochester³, A. Y. Rodriguez⁴⁵, R. W. Romani³, M. Roth²⁰, F. Ryde^5,13, H. F.-W. Sadrozinski⁴, D. Sanchez¹⁵, A. Sander¹⁴, P. M. Saz Parkinson⁴, J. D. Scargle⁴⁶, T. L. Schalk⁴, A. Sellerholm^5,26, C. Sgrò⁷, D. A. Smith^30,31, P. D. Smith¹⁴, G. Spandre⁷, P. Spinelli^18,19, J.-L. Starck⁸, T. E. Stephens²³, M. S. Strickman², A. W. Strong⁴², D. J. Suson⁴⁷, H. Tajima³, H. Takahashi³², T. Takahashi⁴³, T. Tanaka³, J. B. Thayer³, J. G. Thayer³, D. J. Thompson²³, L. Tibaldo^11,12, O. Tibolla⁴⁸, D. F. Torres^49,45, G. Tosti^16,17, A. Tramacere^50,3, Y. Uchiyama³, T. L. Usher³, A. Van Etten³, V. Vasileiou^23,51, N. Vilchez³⁸, V. Vitale^40,52, A. P. Waite³, E. Wallace²⁰, P. Wang³, B. L. Winer¹⁴, K. S. Wood², T. Ylinen^53,5,13, and M. Ziegler⁴ (Fermi LAT Collaboration)
¹National Research Council Research Associate
²Space Science Division, Naval Research Laboratory, Washington, D.C. 20375, USA
³W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University, Stanford, California 94305, USA
⁴Santa Cruz Institute for Particle Physics, Department of Physics and Department of Astronomy and Astrophysics, University of California at Santa Cruz, Santa Cruz, California 95064, USA
⁵The Oskar Klein Centre for Cosmo Particle Physics, AlbaNova, SE-106 91 Stockholm, Sweden
⁶Department of Astronomy, Stockholm University, SE-106 91 Stockholm, Sweden
⁷Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, I-56127 Pisa, Italy
⁸Laboratoire AIM, CEA-IRFU/CNRS/Université Paris Diderot, Service d’Astrophysique, CEA Saclay, 91191 Gif sur Yvette, France
⁹Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, I-34127 Trieste, Italy
¹⁰Dipartimento di Fisica, Università di Trieste, I-34127 Trieste, Italy
¹¹Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova, Italy
¹²Dipartimento di Fisica “G. Galilei”, Università di Padova, I-35131 Padova, Italy
¹³Department of Physics, Royal Institute of Technology (KTH), AlbaNova, SE-106 91 Stockholm, Sweden
¹⁴Department of Physics, Center for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, Ohio 43210, USA
¹⁵Laboratoire Leprince-Ringuet, École polytechnique, CNRS/IN2P3, Palaiseau, France
¹⁶Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, I-06123 Perugia, Italy
¹⁷Dipartimento di Fisica, Università degli Studi di Perugia, I-06123 Perugia, Italy
¹⁸Dipartimento di Fisica, “M. Merlin” dell’Università e del Politecnico di Bari, I-70126 Bari, Italy
¹⁹Istituto Nazionale di Fisica Nucleare, Sezione di Bari, 70126 Bari, Italy
²⁰Department of Physics, University of Washington, Seattle, Washington 98195-1560, USA
²¹INAF-Istituto di Astrofisica Spaziale e Fisica Cosmica, I-20133 Milano, Italy
²²George Mason University, Fairfax, Virginia 22030, USA
²³NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA
²⁴Laboratoire de Physique Théorique et Astroparticules, Université Montpellier 2, CNRS/IN2P3, Montpellier, France
²⁵Department of Physics and Astronomy, Sonoma State University, Rohnert Park, California 94928-3609, USA
²⁶Department of Physics, Stockholm University, AlbaNova, SE-106 91 Stockholm, Sweden
²⁷Royal Swedish Academy of Sciences Research Fellow, funded by a grant from the K. A. Wallenberg Foundation
²⁸Agenzia Spaziale Italiana (ASI) Science Data Center, I-00044 Frascati (Roma), Italy
²⁹Dipartimento di Fisica, Università di Udine and Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, Gruppo Collegato di Udine, I-33100 Udine, Italy
³⁰CNRS/IN2P3, Centre d’Études Nucléaires Bordeaux Gradignan, UMR 5797, Gradignan, 33175, France
³¹Université de Bordeaux, Centre d’Études Nucléaires Bordeaux Gradignan, UMR 5797, Gradignan, 33175, France
³²Department of Physical Sciences, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan
³³University of Maryland, College Park, Maryland 20742, USA
³⁴University of Alabama in Huntsville, Huntsville, Alabama 35899, USA
³⁵Waseda University, 1-104 Totsukamachi, Shinjuku-ku, Tokyo, 169-8050, Japan
³⁶Cosmic Radiation Laboratory, Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198, Japan
³⁷Department of Physics, Tokyo Institute of Technology, Meguro City, Tokyo 152-8551, Japan
³⁸Centre d’Étude Spatiale des Rayonnements, CNRS/UPS, BP 44346, F-30128 Toulouse Cedex 4, France
³⁹Center for Research and Exploration in Space Science and Technology (CRESST), NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA
⁴⁰Istituto Nazionale di Fisica Nucleare, Sezione di Roma “Tor Vergata”, I-00133 Roma, Italy
⁴¹Department of Physics and Astronomy, University of Denver, Denver, Colorado 80208, USA
⁴²Max-Planck Institut für extraterrestrische Physik, 85748 Garching, Germany
⁴³Institute of Space and Astronautical Science, JAXA, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510, Japan
⁴⁴Iowa State University, Department of Physics and Astronomy, Ames, Iowa 50011-3160, USA
⁴⁵Institut de Ciencies de l’Espai (IEEC-CSIC), Campus UAB, 08193 Barcelona, Spain
⁴⁶Space Sciences Division, NASA Ames Research Center, Moffett Field, California 94035-1000, USA
⁴⁷Department of Chemistry and Physics, Purdue University Calumet, Hammond, Indiana 46323-2094, USA
⁴⁸Max-Planck-Institut für Kernphysik, D-69029 Heidelberg, Germany
⁴⁹Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
⁵⁰Consorzio Interuniversitario per la Fisica Spaziale (CIFS), I-10133 Torino, Italy
⁵¹University of Maryland, Baltimore County, Baltimore, Maryland 21250, USA
⁵²Dipartimento di Fisica, Università di Roma “Tor Vergata”, I-00133 Roma, Italy
⁵³School of Pure and Applied Natural Sciences, University of Kalmar, SE-391 82 Kalmar, Sweden

^*luca.latronico@pi.infn.it

^†Alexander.A.Moiseev@nasa.gov