Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV
Abstract
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.
- Authors:
-
- SLAC National Accelerator Lab., Menlo Park, CA (United States); et al.
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE
- Contributing Org.:
- Fermi LAT (United States)
- OSTI Identifier:
- 1357520
- Grant/Contract Number:
- AC02-76SF00515
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. D, Particles, Fields, Gravitation and Cosmology
- Additional Journal Information:
- Journal Volume: 82; Journal Issue: 9; Journal ID: ISSN 1550-7998
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS
Citation Formats
Ackermann, M. Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV. United States: N. p., 2010.
Web. doi:10.1103/PhysRevD.82.092004.
Ackermann, M. Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV. United States. https://doi.org/10.1103/PhysRevD.82.092004
Ackermann, M. Mon .
"Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV". United States. https://doi.org/10.1103/PhysRevD.82.092004. https://www.osti.gov/servlets/purl/1357520.
@article{osti_1357520,
title = {Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV},
author = {Ackermann, M.},
abstractNote = {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.},
doi = {10.1103/PhysRevD.82.092004},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
number = 9,
volume = 82,
place = {United States},
year = {Mon Nov 01 00:00:00 EDT 2010},
month = {Mon Nov 01 00:00:00 EDT 2010}
}
Free Publicly Available Full Text
Publisher's Version of Record
Other availability
Search WorldCat to find libraries that may hold this journal
Cited by: 281 works
Citation information provided by
Web of Science
Web of Science
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.
Works referenced in this record:
THE LARGE AREA TELESCOPE ON THE FERMI GAMMA-RAY SPACE TELESCOPE MISSION
journal, May 2009
- Atwood, W. B.; Abdo, A. A.; Ackermann, M.
- The Astrophysical Journal, Vol. 697, Issue 2
Emulsion chamber observations of primary cosmic-ray electrons in the energy range 30-1000 GeV
journal, May 1980
- Nishimura, J.; Fujii, M.; Taira, T.
- The Astrophysical Journal, Vol. 238
The Energy Spectra and Relative Abundances of Electrons and Positrons in the Galactic Cosmic Radiation
journal, May 1998
- Barwick, S. W.; Beatty, J. J.; Bower, C. R.
- The Astrophysical Journal, Vol. 498, Issue 2
Cosmic-ray electrons and positrons
journal, January 2001
- Müller, Dietrich
- Advances in Space Research, Vol. 27, Issue 4
An excess of cosmic ray electrons at energies of 300–800 GeV
journal, November 2008
- Chang, J.; Adams, J. H.; Ahn, H. S.
- Nature, Vol. 456, Issue 7220
Probing the ATIC peak in the cosmic-ray electron spectrum with H.E.S.S.
journal, October 2009
- Aharonian, F.; Akhperjanian, A. G.; Anton, G.
- Astronomy & Astrophysics, Vol. 508, Issue 2
An anomalous positron abundance in cosmic rays with energies 1.5–100 GeV
journal, April 2009
- Adriani, O.; Barbarino, G. C.; Bazilevskaya, G. A.
- Nature, Vol. 458, Issue 7238
Production and Propagation of Cosmic‐Ray Positrons and Electrons
journal, February 1998
- Moskalenko, I. V.; Strong, A. W.
- The Astrophysical Journal, Vol. 493, Issue 2
The Most Likely Sources of High‐Energy Cosmic‐Ray Electrons in Supernova Remnants
journal, January 2004
- Kobayashi, T.; Komori, Y.; Yoshida, K.
- The Astrophysical Journal, Vol. 601, Issue 1
On possible interpretations of the high energy electron–positron spectrum measured by the Fermi Large Area Telescope
journal, September 2009
- Grasso, D.; Profumo, S.; Strong, A. W.
- Astroparticle Physics, Vol. 32, Issue 2
The silicon tracker readout electronics of the gamma-ray large area space telescope
journal, April 2006
- Baldini, L.; Brez, A.; Himel, T.
- IEEE Transactions on Nuclear Science, Vol. 53, Issue 2
The on-orbit calibration of the Fermi Large Area Telescope
journal, October 2009
- Abdo, A. A.; Ackermann, M.; Ajello, M.
- Astroparticle Physics, Vol. 32, Issue 3-4
The Alpha Magnetic Spectrometer (AMS) on the International Space Station: Part I – results from the test flight on the space shuttle
journal, August 2002
- Aguilar, M.; Alcaraz, J.; Allaby, J.
- Physics Reports, Vol. 366, Issue 6
Measurements of primary and atmospheric cosmic-ray spectra with the BESS-TeV spectrometer
journal, July 2004
- Haino, S.; Sanuki, T.; Abe, K.
- Physics Letters B, Vol. 594, Issue 1-2
Geant4—a simulation toolkit
journal, July 2003
- Agostinelli, S.; Allison, J.; Amako, K.
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 506, Issue 3
Atmospheric production of energetic protons, electrons and positrons observed in near Earth orbit
journal, November 2003
- Zuccon, P.
- Astroparticle Physics, Vol. 20, Issue 2
Review of Particle Physics
journal, July 2010
- Nakamura, K.
- Journal of Physics G: Nuclear and Particle Physics, Vol. 37, Issue 7A
Data Mining and Machine Learning in Astronomy
journal, July 2010
- Ball, Nicholas M.; Brunner, Robert J.
- International Journal of Modern Physics D, Vol. 19, Issue 07
A multidimensional unfolding method based on Bayes' theorem
journal, August 1995
- D'Agostini, G.
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 362, Issue 2-3
A review of geomagnetic cutoff rigidities for earth-orbiting spacecraft
journal, January 2005
- Smart, D. F.; Shea, M. A.
- Advances in Space Research, Vol. 36, Issue 10
Diffuse Galactic Continuum Gamma Rays: A Model Compatible with EGRET Data and Cosmic‐Ray Measurements
journal, October 2004
- Strong, Andrew W.; Moskalenko, Igor V.; Reimer, Olaf
- The Astrophysical Journal, Vol. 613, Issue 2
The Cosmic‐Ray Electron and Positron Spectra Measured at 1 AU during Solar Minimum Activity
journal, March 2000
- Boezio, M.; Carlson, P.; Francke, T.
- The Astrophysical Journal, Vol. 532, Issue 1
Cosmic ray measurements with Pamela experiment
journal, May 2009
- Casolino, M.; De Simone, N.; De Pascale, M. P.
- Nuclear Physics B - Proceedings Supplements, Vol. 190
Propagation of Cosmic‐Ray Nucleons in the Galaxy
journal, December 1998
- Strong, Andrew W.; Moskalenko, Igor V.
- The Astrophysical Journal, Vol. 509, Issue 1
Dissipation of Magnetohydrodynamic Waves on Energetic Particles: Impact on Interstellar Turbulence and Cosmic‐Ray Transport
journal, May 2006
- Ptuskin, Vladimir S.; Moskalenko, Igor V.; Jones, Frank C.
- The Astrophysical Journal, Vol. 642, Issue 2
Cosmic-Ray Propagation and Interactions in the Galaxy
journal, November 2007
- Strong, Andrew W.; Moskalenko, Igor V.; Ptuskin, Vladimir S.
- Annual Review of Nuclear and Particle Science, Vol. 57, Issue 1
Solar Modulation of Galactic Cosmic Rays
journal, November 1968
- Gleeson, L. J.; Axford, W. I.
- The Astrophysical Journal, Vol. 154
Balloon-borne observations of the galactic positron fraction during solar minimum negative polarity: BRIEF REPORT
journal, October 2009
- Clem, John; Evenson, Paul
- Journal of Geophysical Research: Space Physics, Vol. 114, Issue A10
Long‐Term Cosmic‐Ray Modulation in the Heliosphere
journal, March 2004
- Ferreira, S. E. S.; Potgieter, M. S.
- The Astrophysical Journal, Vol. 603, Issue 2
The heliospheric modulation of galactic cosmic rays at solar minimum
journal, January 1997
- Potgieter, M. S.
- Advances in Space Research, Vol. 19, Issue 6
ON THE ENERGY SPECTRA OF GeV/TeV COSMIC RAY LEPTONS
journal, January 2010
- Stawarz, Łukasz; Petrosian, Vahé; Blandford, Roger D.
- The Astrophysical Journal, Vol. 710, Issue 1
Origin of the Positron Excess in Cosmic Rays
journal, July 2009
- Blasi, Pasquale
- Physical Review Letters, Vol. 103, Issue 5
Cosmic‐Ray Electrons and Positrons from 1 to 100 GeV: Measurements with HEAT and Their Interpretation
journal, September 2001
- DuVernois, M. A.; Barwick, S. W.; Beatty, J. J.
- The Astrophysical Journal, Vol. 559, Issue 1
The Energy Spectrum of Cosmic‐Ray Electrons from 10 to 100 GeV Observed with a Highly Granulated Imaging Calorimeter
journal, October 2001
- Torii, S.; Tamura, T.; Tateyama, N.
- The Astrophysical Journal, Vol. 559, Issue 2
Works referencing / citing this record:
Casting light on dark matter
journal, February 2012
- Ellis, John
- Hyperfine Interactions, Vol. 213, Issue 1-3
The interstellar cosmic-ray electron spectrum from synchrotron radiation and direct measurements
journal, September 2011
- Strong, A. W.; Orlando, E.; Jaffe, T. R.
- Astronomy & Astrophysics, Vol. 534
A database of charged cosmic rays
journal, September 2014
- Maurin, D.; Melot, F.; Taillet, R.
- Astronomy & Astrophysics, Vol. 569
A new look at the cosmic ray positron fraction
journal, February 2015
- Boudaud, M.; Aupetit, S.; Caroff, S.
- Astronomy & Astrophysics, Vol. 575
Planck 2015 results : XI. CMB power spectra, likelihoods, and robustness of parameters
journal, September 2016
- Aghanim, N.; Arnaud, M.; Ashdown, M.
- Astronomy & Astrophysics, Vol. 594
Planck intermediate results : XLII. Large-scale Galactic magnetic fields
journal, December 2016
- Adam, R.; Ade, P. A. R.; Alves, M. I. R.
- Astronomy & Astrophysics, Vol. 596
A review of indirect searches for particle dark matter
journal, June 2016
- Gaskins, Jennifer M.
- Contemporary Physics, Vol. 57, Issue 4
The impact of recent advances in laboratory astrophysics on our understanding of the cosmos
journal, February 2012
- Savin, D. W.; Brickhouse, N. S.; Cowan, J. J.
- Reports on Progress in Physics, Vol. 75, Issue 3
THE FERMI LARGE AREA TELESCOPE ON ORBIT: EVENT CLASSIFICATION, INSTRUMENT RESPONSE FUNCTIONS, AND CALIBRATION
journal, October 2012
- Ackermann, M.; Ajello, M.; Albert, A.
- The Astrophysical Journal Supplement Series, Vol. 203, Issue 1
An updated analysis of Inert Higgs Doublet Model in light of the recent results from LUX, PLANCK, AMS-02 and LHC
journal, June 2014
- Arhrib, Abdesslam; Tsai, Yue-Lin Sming; Yuan, Qiang
- Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 06
Dark matter vs. astrophysics in the interpretation of AMS-02 electron and positron data
journal, May 2016
- Mauro, Mattia Di; Donato, Fiorenza; Fornengo, Nicolao
- Journal of Cosmology and Astroparticle Physics, Vol. 2016, Issue 05
Late decaying 2-component dark matter scenario as an explanation of the AMS-02 positron excess
journal, October 2017
- Buch, Jatan; Ralegankar, Pranjal; Rentala, Vikram
- Journal of Cosmology and Astroparticle Physics, Vol. 2017, Issue 10
Imprints of cosmic rays in multifrequency observations of the interstellar emission
journal, December 2017
- Orlando, E.
- Monthly Notices of the Royal Astronomical Society, Vol. 475, Issue 2
Light dark matter and the electroweak phase transition in the NMSSM
journal, February 2012
- Carena, Marcela; Shah, Nausheen R.; Wagner, Carlos E. M.
- Physical Review D, Vol. 85, Issue 3
Direct detection of leptophilic dark matter in a model with radiative neutrino masses
journal, April 2012
- Schmidt, Daniel; Schwetz, Thomas; Toma, Takashi
- Physical Review D, Vol. 85, Issue 7
Gamma ray constraints on decaying dark matter
journal, October 2012
- Cirelli, Marco; Moulin, Emmanuel; Panci, Paolo
- Physical Review D, Vol. 86, Issue 8
Dynamical Dark Matter and the positron excess in light of AMS results
journal, November 2013
- Dienes, Keith R.; Kumar, Jason; Thomas, Brooks
- Physical Review D, Vol. 88, Issue 10
Testing the dark matter scenario in the inert doublet model by future precision measurements of the Higgs boson couplings
journal, December 2016
- Kanemura, Shinya; Kikuchi, Mariko; Sakurai, Kodai
- Physical Review D, Vol. 94, Issue 11
Cosmic-ray electron-positron spectrum from 7 GeV to 2 TeV with the Fermi Large Area Telescope
journal, April 2017
- Abdollahi, S.; Ackermann, M.; Ajello, M.
- Physical Review D, Vol. 95, Issue 8
Diffuse Galactic Gamma Rays from Shock-Accelerated Cosmic Rays
journal, August 2012
- Dermer, Charles D.
- Physical Review Letters, Vol. 109, Issue 9
New Limits on Dark Matter Annihilation from Alpha Magnetic Spectrometer Cosmic Ray Positron Data
journal, October 2013
- Bergström, Lars; Bringmann, Torsten; Cholis, Ilias
- Physical Review Letters, Vol. 111, Issue 17
Precision Measurement of the Flux in Primary Cosmic Rays from 0.5 GeV to 1 TeV with the Alpha Magnetic Spectrometer on the International Space Station
journal, November 2014
- Aguilar, M.; Aisa, D.; Alpat, B.
- Physical Review Letters, Vol. 113, Issue 22
Escape of cosmic-ray electrons from supernova remnants: Escape of CR electrons from SNRs
journal, October 2012
- Ohira, Yutaka; Yamazaki, Ryo; Kawanaka, Norita
- Monthly Notices of the Royal Astronomical Society, Vol. 427, Issue 1
A Cocoon of Freshly Accelerated Cosmic Rays Detected by Fermi in the Cygnus Superbubble
journal, November 2011
- Ackermann, M.; Ajello, M.; Allafort, A.
- Science, Vol. 334, Issue 6059
Fermi – LARGE AREA TELESCOPE: ACCOMPLISHMENTS AND CHALLENGES
journal, January 2013
- Kamae, Tuneyoshi
- Modern Physics Letters A, Vol. 28, Issue 02
Multi-component dark matter in the light of new AMS-02 data
journal, October 2015
- Lai, Chang; Huang, Da; Geng, Chao-Qiang
- Modern Physics Letters A, Vol. 30, Issue 35
Large-Scale Features of the Radio Sky and a Model for Loop I
journal, May 2018
- Dickinson, Clive
- Galaxies, Vol. 6, Issue 2
Suprathermal Electrons at Saturn'S bow Shock
journal, July 2016
- Masters, A.; Sulaiman, A. H.; Sergis, N.
- The Astrophysical Journal, Vol. 826, Issue 1
HelMod in the Works: From Direct Observations to the Local Interstellar Spectrum of Cosmic-Ray Electrons
journal, February 2018
- Boschini, M. J.; Torre, S. Della; Gervasi, M.
- The Astrophysical Journal, Vol. 854, Issue 2
Planck intermediate results: VI. The dynamical structure of PLCKG214.6+37.0, a Planck discovered triple system of galaxy clusters
journal, February 2013
- Ade, P. A. R.; Aghanim, N.; Arnaud, M.
- Astronomy & Astrophysics, Vol. 550
Planck 2015 results : XIII. Cosmological parameters
journal, September 2016
- Ade, P. A. R.; Aghanim, N.; Arnaud, M.
- Astronomy & Astrophysics, Vol. 594
Fermi – LARGE AREA TELESCOPE: ACCOMPLISHMENTS AND CHALLENGES
conference, February 2013
- Kamae, Tuneyoshi
- Proceedings of the First LeCosPA Symposium, Towards Ultimate Understanding of the Universe
A new look at the cosmic ray positron fraction
conference, August 2016
- Boudaud, Mathieu; Aupetit, Sandy; Caroff, Sami
- Proceedings of The 34th International Cosmic Ray Conference — PoS(ICRC2015)
Planck intermediate results : XXIV. Constraints on variations in fundamental constants⋆
journal, July 2015
- Ade, P. A. R.; Aghanim, N.; Arnaud, M.
- Astronomy & Astrophysics, Vol. 580
Planck 2015 results : X. Diffuse component separation: Foreground maps
journal, September 2016
- Adam, R.; Ade, P. A. R.; Aghanim, N.
- Astronomy & Astrophysics, Vol. 594
Cosmic-ray electron-positron spectrum from 7 GeV to 2 TeV with the Fermi Large Area Telescope
collection, January 2017
- Mirabal, N.; Al., Et
- American Physical Society (APS)
Planck 2015 results : XVI. Isotropy and statistics of the CMB
journal, September 2016
- Ade, P. A. R.; Aghanim, N.; Akrami, Y.
- Astronomy & Astrophysics, Vol. 594
Planck 2015 results : XXVI. The Second
journal, September 2016
- Ade, P. A. R.; Aghanim, N.; Argüeso, F.
- Astronomy & Astrophysics, Vol. 594
Constraints on cosmic-ray propagation models from a global Bayesian analysis
text, January 2010
- Trotta, R.; Johannesson, G.; Moskalenko, I. V.
- arXiv
The cosmic-ray electron flux measured by the PAMELA experiment between 1 and 625 GeV
text, January 2011
- Collaboration, Pamela; Adriani, O.; Barbarino, G. C.
- arXiv
The interstellar cosmic-ray electron spectrum from synchrotron radiation and direct measurements
text, January 2011
- Strong, A. W.; Orlando, E.; Jaffe, T. R.
- arXiv
Light Dark Matter and the Electroweak Phase Transition in the NMSSM
text, January 2011
- Carena, Marcela; Shah, Nausheen R.; Wagner, Carlos E. M.
- arXiv
The Impact of Recent Advances in Laboratory Astrophysics on our Understanding of the Cosmos
text, January 2011
- Savin, D. W.; Brickhouse, N. S.; Cowan, J. J.
- arXiv
Fermi-LAT Observations of the Diffuse Gamma-Ray Emission: Implications for Cosmic Rays and the Interstellar Medium
text, January 2012
- Collaboration, Lat
- arXiv
Diffuse Galactic Gamma Rays from Shock-Accelerated Cosmic Rays
text, January 2012
- Dermer, Charles D.
- arXiv
Low energy cosmic ray positron fraction explained by charge-sign dependent solar modulation
text, January 2012
- Maccione, Luca
- arXiv
An Updated Analysis of Inert Higgs Doublet Model in light of the Recent Results from LUX, PLANCK, AMS-02 and LHC
text, January 2013
- Arhrib, Abdesslam; Tsai, Yue-Lin Sming; Yuan, Qiang
- arXiv
Current Dark Matter Annihilation Constraints from CMB and Low-Redshift Data
text, January 2013
- Madhavacheril, Mathew S.; Sehgal, Neelima; Slatyer, Tracy R.
- arXiv
Imprint of Multi-component Dark Matter on AMS-02
text, January 2013
- Geng, Chao-Qiang; Huang, Da; Tsai, Lu-Hsing
- arXiv
Planck 2015 results. XXV. Diffuse low-frequency Galactic foregrounds
text, January 2015
- Collaboration, Planck; Ade, P. A. R.; Aghanim, N.
- arXiv
Planck intermediate results. XLII. Large-scale Galactic magnetic fields
text, January 2016
- Collaboration, Planck; Adam, R.; Ade, P. A. R.
- arXiv
A review of indirect searches for particle dark matter
text, January 2016
- Gaskins, Jennifer M.
- arXiv
Testing the dark matter scenario in the inert doublet model by future precision measurements of the Higgs boson couplings
text, January 2016
- Kanemura, Shinya; Kikuchi, Mariko; Sakurai, Kodai
- arXiv
Suprathermal electrons at Saturn's bow shock
text, January 2016
- Masters, A.; Sulaiman, A. H.; Sergis, N.
- arXiv
Late decaying 2-component dark matter scenario as an explanation of the AMS-02 positron excess
text, January 2016
- Buch, Jatan; Ralegankar, Pranjal; Rentala, Vikram
- arXiv
Imprints of Cosmic Rays in Multifrequency Observations of the Interstellar Emission
text, January 2017
- Orlando, E.
- arXiv
HelMod in the works: from direct observations to the local interstellar spectrum of cosmic-ray electrons
text, January 2018
- Boschini, M. J.; Della Torre, S.; Gervasi, M.
- arXiv