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- W2888954702 abstract "Cosmic-ray electrons and positrons (CREs) at GeV-TeV energies are a unique probe of our local Galactic neighborhood. CREs lose energy rapidly via synchrotron radiation and inverse-Compton scattering processes while propagating within the Galaxy, and these losses limit their propagation distance. For electrons with TeV energies, the limit is on the order of a kiloparsec. Within that distance, there are only a few known astrophysical objects capable of accelerating electrons to such high energies. It is also possible that the CREs are the products of the annihilation or decay of heavy dark matter (DM) particles. VERITAS, an array of imaging air Cherenkov telescopes in southern Arizona, is primarily utilized for gamma-ray astronomy but also simultaneously collects CREs during all observations. We describe our methods of identifying CREs in VERITAS data and present an energy spectrum, extending from 300 GeV to 5 TeV, obtained from approximately 300 hours of observations. A single power-law fit is ruled out in VERITAS data. We find that the spectrum of CREs is consistent with a broken power law, with a break energy at 710±40stat±140syst GeV.Received 23 March 2018DOI:https://doi.org/10.1103/PhysRevD.98.062004© 2018 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasCosmic ray composition & spectraGravitation, Cosmology & Astrophysics" @default.
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- W2888954702 date "2018-09-20" @default.
- W2888954702 modified "2023-09-27" @default.
- W2888954702 title "Measurement of cosmic-ray electrons at TeV energies by VERITAS" @default.
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- W2888954702 doi "https://doi.org/10.1103/physrevd.98.062004" @default.
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