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

(CALET Collaboration)

Research output: Contribution to journalArticle

43 Citations (Scopus)

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.

Original languageEnglish
Article number181101
JournalPhysical Review Letters
Volume119
Issue number18
DOIs
Publication statusPublished - 2017 Nov 1

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particle telescopes
International Space Station
cosmic rays
positrons
energy spectra
rejection
electrons
statistics
protons
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

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. / (CALET Collaboration).

In: Physical Review Letters, Vol. 119, No. 18, 181101, 01.11.2017.

Research output: Contribution to journalArticle

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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.",
author = "{(CALET Collaboration)} and O. Adriani and Y. Akaike and K. Asano and Yoichi Asaoka and Bagliesi, {M. G.} and G. Bigongiari and Binns, {W. R.} and S. Bonechi and M. Bongi and P. Brogi and Buckley, {J. H.} and N. Cannady and G. Castellini and C. Checchia and Cherry, {M. L.} and G. Collazuol and {Di Felice}, V. and K. Ebisawa and H. Fuke and Guzik, {T. G.} and T. Hams and M. Hareyama and N. Hasebe and K. Hibino and M. Ichimura and K. Ioka and W. Ishizaki and Israel, {M. H.} and A. Javaid and K. Kasahara and Jun Kataoka and R. Kataoka and Y. Katayose and C. Kato and N. Kawanaka and Y. Kawakubo and Krawczynski, {H. S.} and Krizmanic, {J. F.} and S. Kuramata and T. Lomtadze and P. Maestro and Marrocchesi, {P. S.} and Messineo, {A. M.} and Mitchell, {J. W.} and S. Miyake and K. Mizutani and Moiseev, {A. A.} and K. Mori and Motz, {Holger Martin} and Shunsuke Ozawa",
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AU - Adriani, O.

AU - Akaike, Y.

AU - Asano, K.

AU - Asaoka, Yoichi

AU - Bagliesi, M. G.

AU - Bigongiari, G.

AU - Binns, W. R.

AU - Bonechi, S.

AU - Bongi, M.

AU - Brogi, P.

AU - Buckley, J. H.

AU - Cannady, N.

AU - Castellini, G.

AU - Checchia, C.

AU - Cherry, M. L.

AU - Collazuol, G.

AU - Di Felice, V.

AU - Ebisawa, K.

AU - Fuke, H.

AU - Guzik, T. G.

AU - Hams, T.

AU - Hareyama, M.

AU - Hasebe, N.

AU - Hibino, K.

AU - Ichimura, M.

AU - Ioka, K.

AU - Ishizaki, W.

AU - Israel, M. H.

AU - Javaid, A.

AU - Kasahara, K.

AU - Kataoka, Jun

AU - Kataoka, R.

AU - Katayose, Y.

AU - Kato, C.

AU - Kawanaka, N.

AU - Kawakubo, Y.

AU - Krawczynski, H. S.

AU - Krizmanic, J. F.

AU - Kuramata, S.

AU - Lomtadze, T.

AU - Maestro, P.

AU - Marrocchesi, P. S.

AU - Messineo, A. M.

AU - Mitchell, J. W.

AU - Miyake, S.

AU - Mizutani, K.

AU - Moiseev, A. A.

AU - Mori, K.

AU - Motz, Holger Martin

AU - Ozawa, Shunsuke

PY - 2017/11/1

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N2 - 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.

AB - 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.

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DO - 10.1103/PhysRevLett.119.181101

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JO - Physical Review Letters

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