Energy Spectrum of Cosmic-ray Electron and Positron from 10 GeV to 3 TeV Observed with the Calorimetric Electron Telescope on the International Space Station
Authors
O. Adriani, University of Florence, INFN Sezione di Florence
Y. Akaike, University of Maryland, Astroparticle Physics Laboratory, NASA/GSFC
K. Asano, Institute for Cosmic Ray Research, The University of Tokyo
Y. Asaoka, Research Institute for Science and Engineering, Waseda University, JEM Utilization Center, Human Spaceflight Technology Directorate, Japan Aerospace Exploration Agency
M. G. Bagliesi, University of Siena, INFN Sezione di Pisa
G. Bigongiari, University of Siena, INFN Sezione di Pisa
W. R. Binns, Washington University
S. Bonechi, University of Siena, INFN Sezione di Pisa
M. Bongi, University of Florence, INFN Sezione di Florence
P. Brogi, University of Siena, INFN Sezione di Pisa
J. H. Buckley, Washington University
N. Cannady, Louisiana State University
G. Castellini, Institute of Applied Physics (IFAC), National Research Council (CNR), Via Madonna del Piano
C. Checchia, University of Padova, INFN Sezione di Padova
M. L. Cherry, Louisiana State University
G. Collazuol, University of Padova, INFN Sezione di Padova
V. Di Felice, University of Rome “Tor Vergata,” Via della Ricerca Scientifica, INFN Sezione di Rome “Tor Vergata,” Via della Ricerca Scientifica
K. Ebisawa, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
H. Fuke, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
T. G. Guzik, Louisiana State University
T. Hams, University of Maryland, CRESST and Astroparticle Physics Laboratory NASA/GSFC
M. Hareyama, St. Marianna University School of Medicine
N. Hasebe, Research Institute for Science and Engineering, Waseda University
K. Hibino, Kanagawa University
M. Ichimura, Hirosaki University
K. Ioka, Yukawa Institute for Theoretical Physics, Kyoto University
W. Ishizaki, Institute for Cosmic Ray Research, The University of Tokyo
M. H. Israel, Washington University
A. Javaid, Louisiana State University
K. Kasahara, Research Institute for Science and Engineering, Waseda University
J. Kataoka, Research Institute for Science and Engineering, Waseda University
R. Kataoka, National Institute of Polar Research
Y. Katayose, Yokohama National University
C. Kato, Shinshu University
N. Kawanaka, Hakubi Center, Kyoto University, Kyoto University
Y. Kawakubo, Aoyama Gakuin University
H. S. Krawczynski, Washington University
J. F. Krizmanic, CRESST and Astroparticle Physics Laboratory NASA/GSFC, University of Maryland
S. Kuramata, Hirosaki University
T. Lomtadze, University of Pisa, INFN Sezione di Pisa
P. Maestro, University of Siena, INFN Sezione di Pisa
P. S. Marrocchesi, University of Siena, INFN Sezione di Pisa
A. M. Messineo, University of Pisa, INFN Sezione di Pisa
J. W. Mitchell, Astroparticle Physics Laboratory, NASA/GSFC
S. Miyake, National Institute of Technology, Ibaraki College
K. Mizutani, Saitama University
A. A. Moiseev, University of Maryland, University of Siena
K. Mori, Research Institute for Science and Engineering, Waseda University, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
M. Mori, Ritsumeikan University
N. Mori, INFN Sezione di Florence
H. M. Motz, International Center for Science and Engineering Programs, Waseda University
K. Munakata, Shinshu University
H. Murakami, Research Institute for Science and Engineering, Waseda University
S. Nakahira, RIKEN
J. Nishimura, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
G. A. de Nolfo, Heliospheric Physics Laboratory, NASA/GSFC
S. Okuno, Kanagawa University
J. F. Ormes, University of DenverFollow
S. Ozawa, Research Institute for Science and Engineering, Waseda University
L. Pacini, University of Florence, Institute of Applied Physics (IFAC), National Research Council (CNR), Via Madonna del Piano, INFN Sezione di Florence
F. Palma, University of Rome “Tor Vergata,” Via della Ricerca Scientifica, INFN Sezione di Rome
P. Papini, INFN Sezione di Florence
A. V. Penacchioni, University of Siena, ASI Science Data Center (ASDC), Via del Politecnico snc
B. F. Rauch, Washington University
S. B. Ricciarini, Institute of Applied Physics (IFAC), National Research Council (CNR), Via Madonna del Piano, INFN Sezione di Florence
K. Sakai, CRESST and Astroparticle Physics Laboratory NASA/GSFC, Department of Physics, University of Maryland
T. Sakamoto, Aoyama Gakuin University
M. Sasaki, CRESST and Astroparticle Physics Laboratory NASA/GSFC, University of Maryland
Y. Shimizu, Kanagawa University
A. Shiomi, Nihon University
R. Sparvoli, University of Rome “Tor Vergata,” Via della Ricerca Scientifica, INFN Sezione di Rome
P. Spillantini, University of Florence
F. Stolzi, University of Siena, INFN Sezione di Pisa
I. Takahashi, Kavli Institute for the Physics and Mathematics of the Universe, The University of Tokyo
M. Takayanagi, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
M. Takita, Institute for Cosmic Ray Research, The University of Tokyo
T. Tamura, Kanagawa University
N. Tateyama, Kanagawa University
T. Terasawa, RIKEN
H. Tomida, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
S. Torii, Research Institute for Science and Engineering, Waseda University, JEM Utilization Center, Human Spaceflight Technology Directorate, Japan Aerospace Exploration Agency, School of Advanced Science and Engineering, Waseda University
Y. Tsunesada, Osaka City University
Y. Uchihori, National Institutes for Quantum and Radiation Science and Technology
S. Ueno, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
E. Vannuccini, INFN Sezione di Florence
J. P. Wefel, Louisiana State University
K. Yamaoka, Nagoya University
S. Yanagita, Ibaraki University
A. Yoshida, Aoyama Gakuin University
K. Yoshida, Shibaura Institute of Technology
T. Yuda, Institute for Cosmic Ray Research, The University of Tokyo
CALET Collaboration
Publication Date
11-1-2017
Organizational Units
Physics and Astronomy
Keywords
Cosmic ray acceleration, Cosmic ray composition & spectra, Cosmic ray propagation, Cosmic ray sources, Cosmic rays & astroparticles, Particle dark matter
Abstract
First results of a cosmic-ray electron and positron spectrum from 10 GeV to 3 TeV is presented based upon observations with the CALET instrument on the International Space Station starting in October, 2015. Nearly a half million electron and positron events are included in the analysis. CALET is an all-calorimetric instrument with total vertical thickness of 30 X0 and a fine imaging capability designed to achieve a large proton rejection and excellent energy resolution well into the TeV energy region. The observed energy spectrum over 30 GeV can be fit with a single power law with a spectral index of −3.152±0.016 (stat+syst). Possible structure observed above 100 GeV requires further investigation with increased statistics and refined data analysis.
Publication Statement
Copyright held by author or publisher. User is responsible for all copyright compliance.
Recommended Citation
Adriani, O, et al. “Energy Spectrum of Cosmic-Ray Electron and Positron from 10 GeV to 3 TeV Observed with the Calorimetric Electron Telescope on the International Space Station.” Physical Review Letters, vol. 119, no. 18, 2017, p. 181101. doi: 10.1103/physrevlett.119.181101.
