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 journalArticlepeer-review

Abstract

First results of a cosmic-ray electron + positron spectrum, from 10 GeV to 3 TeV, is presented based upon observations with the CALET instrument on the ISS starting in October, 2015. Nearly a half million electron + 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
JournalUnknown Journal
Publication statusPublished - 2017 Dec 5

ASJC Scopus subject areas

  • General

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