Title

Extended Measurement of the Cosmic-Ray Electron and Positron Spectrum from 11 GeV to 4.8 TeV with the Calorimetric Electron Telescope on the International Space Station

Authors

O. Adriani, Department of Physics, University of Florence, INFN Sezione di Florence
Y. Akaike, Department of Physics, 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, EM Utilization Center, Human Spaceflight Technology Directorate, Japan Aerospace Exploration Agency
M. G. Bagliesi, Department of Physical Sciences, Earth and Environment, University of Siena, INFN Sezione di Pisa, Polo Fibonacci
E. Berti, Department of Physics, University of Florence, INFN Sezione di Florence
G. Bigongiari, Department of Physical Sciences, Earth and Environment, University of Siena, INFN Sezione di Pisa, Polo Fibonacci
W. R. Binns, Department of Physics, Washington University
S. Bonechi, Department of Physical Sciences, Earth and Environment, University of Siena, INFN Sezione di Pisa
M. Bongi, Department of Physics, University of Florence, INFN Sezione di Florence
P. Brogi, Department of Physical Sciences, Earth and Environment, University of Siena, INFN Sezione di Pisa
J. H. Buckley, Department of Physics, Washington University
N. Cannady, Department of Physics and Astronomy, Louisiana State University
G. Castellini, Institute of Applied Physics (IFAC), National Research Council (CNR)
C. Checchia, Department of Physics and Astronomy, University of Padova, INFN Sezione di Padova
M. L. Cherry, Department of Physics and Astronomy, Louisiana State University
G. Collazuol, Department of Physics and Astronomy, University of Padova, INFN Sezione di Padova
V. Di Felice, University of Rome “Tor Vergata”, INFN Sezione di Rome “Tor Vergata”
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, Department of Physics and Astronomy, Louisiana State University
T. Hams, Department of Physics, 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, Faculty of Science and Technology, Graduate School of Science and Technology, 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, Department of Physics, Washington 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, Faculty of Engineering, Division of Intelligent Systems Engineering, Yokohama National University
C. Kato, Faculty of Science, Shinshu University
N. Kawanaka, Hakubi Center, Kyoto University, Department of Astronomy, Graduate School of Science, Kyoto University
Y. Kawakubo, College of Science and Engineering, Department of Physics and Mathematics, Aoyama Gakuin University
K. Kohri, Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization
H. S. Krawczynski, Department of Physics, Washington University
J. F. Krizmanic, CRESST and Astroparticle Physics Laboratory NASA/GSFC,Department of Physics, University of Maryland
T. Lomtadze, INFN Sezione di Pisa
P. Maestro, Department of Physical Sciences, Earth and Environment, University of Siena, INFN Sezione di Pisa
P. S. Marrocchesi, Department of Physical Sciences, Earth and Environment, 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, Department of Electrical and Electronic Systems Engineering, National Institute of Technology, Ibaraki College
A. A. Moiseev, Department of Astronomy, University of Maryland, CRESST and Astroparticle Physics Laboratory NASA/GSFC
K. Mori, Research Institute for Science and Engineering, Waseda University, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
M. Mori, Department of Physical Sciences, College of Science and Engineering, Ritsumeikan University
N. Mori, INFN Sezione di Florence
H. M. Motz, International Center for Science and Engineering Programs, Waseda University
K. Munakata, Faculty of Science, 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, Department of Physics, University of Florence, Institute of Applied Physics (IFAC), National Research Council (CNR), INFN Sezione di Florence
F. Palma, University of Rome “Tor Vergata”, INFN Sezione di Rome “Tor Vergata”
P. Papini, INFN Sezione di Florence
A. V. Penacchioni, Department of Physical Sciences, Earth and Environment, University of Siena, ASI Science Data Center (ASDC)
B. F. Rauch, Department of Physics, Washington University
S. B. Ricciarini, Institute of Applied Physics (IFAC), National Research Council (CNR), INFN Sezione di Florence
K. Sakai, CRESST and Astroparticle Physics Laboratory NASA/GSFC, Department of Physics, University of Maryland
T. Sakamoto, College of Science and Engineering, Department of Physics and Mathematics, Aoyama Gakuin University
M. Sasaki, CRESST and Astroparticle Physics Laboratory NASA/GSFC, Department of Astronomy, University of Maryland
Y. Shimizu, Kanagawa University
A. Shiomi, College of Industrial Technology, Nihon University
R. Sparvoli, University of Rome “Tor Vergata”, INFN Sezione di Rome “Tor Vergata”
P. Spillantini, Department of Physics, University of Florence
F. Stolzi, Department of Physical Sciences, Earth and Environment, University of Siena, INFN Sezione di Pisa
J. E. Suh, Department of Physical Sciences, Earth and Environment, University of Siena, INFN Sezione di Pisa
A. Sulaj, Department of Physical Sciences, Earth and Environment, 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, Division of Mathematics and Physics, Graduate School of Science, 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, Department of Physics and Astronomy, Louisiana State University
K. Yamaoka, Nagoya University
S. Yanagita, College of Science, Ibaraki University
A. Yoshida, College of Science and Engineering, Department of Physics and Mathematics, Aoyama Gakuin University
K. Yoshida, Department of Electronic Information Systems, Shibaura Institute of Technology
CALET Collaboration

Document Type

Article

Publication Date

6-25-2018

Compass Link

https://du-primo.hosted.exlibrisgroup.com/permalink/f/1jii0mc/TN_cdi_proquest_miscellaneous_2070239677

Organizational Units

College of Natual Science and Mathematics, Physics and Astronomy

Abstract

Extended results on the cosmic-ray electron + positron spectrum from 11 GeV to 4.8 TeV are presented based on observations with the Calorimetric Electron Telescope (CALET) on the International Space Station utilizing the data up to November 2017. The analysis uses the full detector acceptance at high energies, approximately doubling the statistics compared to the previous result. CALET is an all-calorimetric instrument with a total thickness of 30 X0 at normal incidence and fine imaging capability, designed to achieve large proton rejection and excellent energy resolution well into the TeV energy region. The observed energy spectrum in the region below 1 TeV shows good agreement with Alpha Magnetic Spectrometer (AMS-02) data. In the energy region below ∼300  GeV, CALET’s spectral index is found to be consistent with the AMS-02, Fermi Large Area Telescope (Fermi-LAT), and Dark Matter Particle Explorer (DAMPE), while from 300 to 600 GeV the spectrum is significantly softer than the spectra from the latter two experiments. The absolute flux of CALET is consistent with other experiments at around a few tens of GeV. However, it is lower than those of DAMPE and Fermi-LAT with the difference increasing up to several hundred GeV. The observed energy spectrum above ∼1  TeV suggests a flux suppression consistent within the errors with the results of DAMPE, while CALET does not observe any significant evidence for a narrow spectral feature in the energy region around 1.4 TeV. Our measured all-electron flux, including statistical errors and a detailed breakdown of the systematic errors, is tabulated in the Supplemental Material in order to allow more refined spectral analyses based on our data.

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