Searches for cosmic-ray electron anisotropies with the Fermi Large Area Telescope

M. Ackermann et al. (The Fermi LAT Collaboration)
Phys. Rev. D 82, 092003 – Published 18 November 2010

Abstract

The Large Area Telescope on board the Fermi satellite (Fermi LAT) detected more than 1.6×106 cosmic-ray electrons/positrons with energies above 60 GeV during its first year of operation. The arrival directions of these events were searched for anisotropies of angular scale extending from 10° up to 90°, and of minimum energy extending from 60 GeV up to 480 GeV. Two independent techniques were used to search for anisotropies, both resulting in null results. Upper limits on the degree of the anisotropy were set that depended on the analyzed energy range and on the anisotropy’s angular scale. The upper limits for a dipole anisotropy ranged from 0.5% to 10%.

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  • Received 8 July 2010

DOI:https://doi.org/10.1103/PhysRevD.82.092003

© 2010 The American Physical Society

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See Also

Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV

M. Ackermann et al. (Fermi LAT Collaboration)
Phys. Rev. D 82, 092004 (2010)

Constraints on dark matter models from a Fermi LAT search for high-energy cosmic-ray electrons from the Sun

M. Ajello et al. (The Fermi LAT Collaboration)
Phys. Rev. D 84, 032007 (2011)

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Vol. 82, Iss. 9 — 1 November 2010

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