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Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV
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2010 (English)In: PHYSICAL REVIEW D, ISSN 1550-7998, Vol. 82, no 9, 092004- p.Article in journal (Refereed) Published
Abstract [en]

We present the results of our analysis of cosmic-ray electrons using about 8 x 10(6) electron candidates detected in the first 12 months on-orbit by the Fermi Large Area Telescope. This work extends our previously published cosmic-ray electron spectrum down to 7 GeV, giving a spectral range of approximately 2.5 decades up to 1 TeV. We describe in detail the analysis and its validation using beam-test and on-orbit data. In addition, we describe the spectrum measured via a subset of events selected for the best energy resolution as a cross-check on the measurement using the full event sample. Our electron spectrum can be described with a power law proportional to E-3.08+/-0.05 with no prominent spectral features within systematic uncertainties. Within the limits of our uncertainties, we can accommodate a slight spectral hardening at around 100 GeV and a slight softening above 500 GeV.

Place, publisher, year, edition, pages
2010. Vol. 82, no 9, 092004- p.
Keyword [en]
large-area telescope, space-telescope, energy-spectra, solar minimum, positrons, propagation, modulation, spectrometer, galaxy
National Category
Physical Sciences Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:kth:diva-27355DOI: 10.1103/PhysRevD.82.092004ISI: 000284402000002ScopusID: 2-s2.0-78651335208OAI: diva2:377606
Knut and Alice Wallenberg Foundation
QC 20101214Available from: 2010-12-14 Created: 2010-12-13 Last updated: 2012-02-22Bibliographically approved

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Carlson, PerMoretti, ElenaYlinen, Tomi
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