Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV

Ackermann M, Ajello M, Atwood WB, Baldini L, Ballet J, Barbiellini G, Bastieri D, Baughman BM, Bechtol K, Bellardi F, Bellazzini R, Belli F, Berenji B, Blandford RD, Bloom ED, Bogart JR, Bonamente E, Borgland AW, Brandt TJ, Bregeon J, Brez A, Brigida M, Bruel P, Buehler R, Burnett TH, Busetto G, Buson S, Caliandro GA, Cameron RA, Caraveo PA, Carlson P, Carrigan S, Casandjian JM, Ceccanti M, Cecchi C, Celik O, Charles E, Chekhtman A, Cheung CC, Chiang J, Cillis AN, Ciprini S, Claus R, Cohen-Tanugi J, Conrad J, Corbet R, Deklotz M, Dermer CD, De Angelis A, De Palma F, Digel SW, Di Bernardo G, Do Couto E Silva E, Drell PS, Drlica-Wagner A, Dubois R, Fabiani D, Favuzzi C, Fegan SJ, Fortin P, Fukazawa Y, Funk S, Fusco P, Gaggero D, Gargano F, Gasparrini D, Gehrels N, Germani S, Giglietto N, Giommi P, Giordano F, Giroletti M, Glanzman T, Godfrey G, Grasso D, Grenier IA, Grondin MH, Grove JE, Guiriec S, Gustafsson M, Hadasch D, Harding AK, Hayashida M, Hays E, Horan D, Hughes RE, Johannesson G, Johnson AS, Johnson RP, Johnson WN, Kamae T, Katagiri H, Kataoka J, Kerr M, Knoedlseder J, Kuss MW, Lande J, Latronico L, Lemoine-Goumard M, Garde ML, Longo F, Loparco F, Lott B, Lovellette MN, Lubrano P, Makeev A, Mazziotta MN, Mcenery JE, Mehault J, Michelson PF, Minuti M, Mitthumsiri W, Mizuno T, Moiseev AA, Monte C, Monzani ME, Moretti E, Morselli A, Moskalenko IV, Murgia S, Nakamori T, Naumann-Godo M, Nolan PL, Norris JP, Nuss E, Ohsugi T, Okumura A, Omodei N, Orlando E, Ormes JF, Ozaki M, Paneque D, Panetta JH, Parent D, Pelassa V, Pepe M, Pesce-Rollins M, Petrosian V, Pinchera M, Piron F, Porter TA, Profumo S, Raino S, Rando R, Rapposelli E, Razzano M, Reimer A, Reimer O, Reposeur T, Ripken J, Ritz S, Rochester LS, Romani RW, Roth M, Sadrozinski HFW, Saggini N, Sanchez D, Sander A, Sgro C, Siskind EJ, Smith PD, Spandre G, Spinelli P, Stawarz L, Stephens TE, Strickman MS, Strong AW, Suson DJ, Tajima H, Takahashi HH, Takahashi T, Tanaka T, Thayer JB, Thayer JG, Thompson DJ, Tibaldo L, Tibolla O, Torres DF, Tosti G, Tramacere A, Turri M, Uchiyama Y, Usher TL, Vandenbroucke J, Vasileiou V, Vilchez N, Vitale V, Waite AP, Wallace E, Wang P, Winer BL, Wood KS, Yang Z, Ylinen T, Ziegler M (2010)

Publication Type: Journal article

Publication year: 2010

Journal

Book Volume: 82

Journal Issue: 9

DOI: 10.1103/PhysRevD.82.092004

Abstract

We present the results of our analysis of cosmic-ray electrons using about 8 x 10(6) electron candidates detected in the first 12 months on-orbit by the Fermi Large Area Telescope. This work extends our previously published cosmic-ray electron spectrum down to 7 GeV, giving a spectral range of approximately 2.5 decades up to 1 TeV. We describe in detail the analysis and its validation using beam-test and on-orbit data. In addition, we describe the spectrum measured via a subset of events selected for the best energy resolution as a cross-check on the measurement using the full event sample. Our electron spectrum can be described with a power law proportional to E-3.08+/-0.05 with no prominent spectral features within systematic uncertainties. Within the limits of our uncertainties, we can accommodate a slight spectral hardening at around 100 GeV and a slight softening above 500 GeV.

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) Ohio State University United States (USA) (US) 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) Royal Institute of Technology / Kungliga Tekniska Högskolan (KTH) Sweden (SE) 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) AlbaNova University Centre / Kungliga Tekniska Högskolan AlbaNova Universitetscentrum Sweden (SE) Stellar Solutions, Inc. United States (USA) (US) University of Udine / Università degli Studi di Udine Italy (IT) Hiroshima University Japan (JP) Italian Space Agency / Agenzia Spaziale Italiana (ASI) Italy (IT) Centre d'Etudes Nucléaires de Bordeaux-Gradignan (CENBG) France (FR) University of Alabama in Huntsville (UAH) United States (USA) (US) Institució Catalana de Recerca i Estudis Avançats (ICREA) / Catalan Institution for Research and Advanced Studies Spain (ES) Waseda University / 早稲田大学 Japan (JP) Université Toulouse III - Paul Sabatier France (FR) University of Denver United States (USA) (US) Japan Aerospace eXploration Agency (JAXA) Japan (JP) Max-Planck-Institut für extraterrestrische Physik (MPE) / Max Planck Institute for Extraterrestrial Physics Germany (DE) NYCB Real-Time Computing, Inc. United States (USA) (US) Purdue University Northwest / Purdue University Calumet United States (USA) (US) Julius-Maximilians-Universität Würzburg Germany (DE)

How to cite

APA:

Ackermann, M., Ajello, M., Atwood, W.B., Baldini, L., Ballet, J., Barbiellini, G.,... Ziegler, M. (2010). Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV. Physical Review D - Particles, Fields, Gravitation and Cosmology, 82(9). https://doi.org/10.1103/PhysRevD.82.092004

MLA:

Ackermann, Markus, et al. "Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV." Physical Review D - Particles, Fields, Gravitation and Cosmology 82.9 (2010).

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