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

We present the results of our analysis of cosmic-ray electrons using about 8×106 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 approxima...

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Autor principal: Ackermann, M.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_15507998_v82_n9_p_Ackermann
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_15507998_v82_n9_p_Ackermann2023-10-03T16:24:22Z Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV Ackermann, M. We present the results of our analysis of cosmic-ray electrons using about 8×106 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 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. ©2010 The American Physical Society. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_15507998_v82_n9_p_Ackermann
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description We present the results of our analysis of cosmic-ray electrons using about 8×106 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 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. ©2010 The American Physical Society.
format JOUR
author Ackermann, M.
spellingShingle Ackermann, M.
Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV
author_facet Ackermann, M.
author_sort Ackermann, M.
title Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV
title_short Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV
title_full Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV
title_fullStr Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV
title_full_unstemmed Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV
title_sort fermi lat observations of cosmic-ray electrons from 7 gev to 1 tev
url http://hdl.handle.net/20.500.12110/paper_15507998_v82_n9_p_Ackermann
work_keys_str_mv AT ackermannm fermilatobservationsofcosmicrayelectronsfrom7gevto1tev
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