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 X-0 and a fine imaging capability designed to achieve a large proton rejection and excellent energy resolution well into the TeVenergy 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.

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 / Adriani, O., Akaike, Y., Asano, K., Asaoka, Y., Bagliesi, M.G., Bigongiari, G., Binns, W.R., Bonechi, S., Bongi, M., Brogi, P., Buckley, J.H., Cannady, N., Castellini, G., Checchia, C., Cherry, M.L., Collazuol, G., Di Felice, V., Ebisawa, K., Fuke, H., Guzik, T.G., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - ELETTRONICO. - 119:(2017), pp. 181101-1-181101-6. [10.1103/PhysRevLett.119.181101]

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

Adriani, O.;Bongi, M.;Mori, N.;Pacini, L.;Papini, P.;Ricciarini, S. B.;Spillantini, P.;Vannuccini, E.;
2017

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 X-0 and a fine imaging capability designed to achieve a large proton rejection and excellent energy resolution well into the TeVenergy 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.
2017
119
181101-1
181101-6
Adriani, O.; Akaike, Y.; Asano, K.; Asaoka, Y.; Bagliesi, M.G.; Bigongiari, G.; Binns, W.R.; Bonechi, S.; Bongi, M.; Brogi, P.; Buckley, J.H.; Cannady...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1114654
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