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
Messineo, A. M.;
2017-01-01
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.File | Dimensione | Formato | |
---|---|---|---|
Preprint.pdf
accesso aperto
Tipologia:
Documento in Pre-print
Licenza:
Creative commons
Dimensione
373.74 kB
Formato
Adobe PDF
|
373.74 kB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.