Measurement of the Cosmic Ray electron plus positron spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope

Details Measurement of the Cosmic Ray electron plus positron spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope Measurement of the Cosmic Ray electron plus positron spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope

2009-07-02

arxiv.org/abs/0907.0452v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

Proceedings of the 31st International Cosmic Ray Conference, Lodz, July 7-15 2009

Scientific paper

Designed as a high-sensitivity gamma-ray observatory, the Fermi Large Area Telescope is also an electron detector with a large acceptance exceeding 2 sq-mt sr at 300 GeV. Building on the gamma-ray analysis, we have developed an efficient electron detection strategy which provides sufficient background rejection for measurement of the steeply-falling electron spectrum up to 1 TeV. Our high precision data show that the electron spectrum falls with energy as E^(-3.0) and does not exhibit prominent spectral features

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