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Measurement of the Cosmic Ray e++e- Spectrum from 20GeV to 1TeV with the Fermi Large Area Telescope
Stockholm University, Faculty of Science, Department of Astronomy.
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics.
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2009 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 102, no 18Article in journal (Refereed) Published
Abstract [en]

Designed as a high-sensitivity gamma-ray observatory, the Fermi Large Area Telescope is also an electron detector with a large acceptance exceeding 2m2sr 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. Interpretations in terms of a conventional diffusive model as well as a potential local extra component are briefly discussed.

Place, publisher, year, edition, pages
2009. Vol. 102, no 18
Keyword [en]
2009PhRvL.102r1101A
National Category
Subatomic Physics Astronomy, Astrophysics and Cosmology
Research subject
Astronomy
Identifiers
URN: urn:nbn:se:su:diva-28875DOI: 10.1103/PhysRevLett.102.181101ISI: 000265948600011OAI: oai:DiVA.org:su-28875DiVA: diva2:227509
Available from: 2009-07-14 Created: 2009-07-14 Last updated: 2011-02-15Bibliographically approved

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