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.
| Original language | English |
|---|---|
| Article number | 092004 |
| Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
| Volume | 82 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2010 Nov 18 |
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)
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Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV. / Ackermann, M.; Ajello, M.; Atwood, W. B.; Baldini, L.; Ballet, J.; Barbiellini, G.; Bastieri, D.; Baughman, B. M.; Bechtol, K.; Bellardi, F.; Bellazzini, R.; Belli, F.; Berenji, B.; Blandford, R. D.; Bloom, E. D.; Bogart, J. R.; Bonamente, E.; Borgland, A. W.; Brandt, T. J.; Bregeon, J.; Brez, A.; Brigida, M.; Bruel, P.; Buehler, R.; Burnett, T. H.; Busetto, G.; Buson, S.; Caliandro, G. A.; Cameron, R. A.; Caraveo, P. A.; Carlson, P.; Carrigan, S.; Casandjian, J. M.; Ceccanti, M.; Cecchi, C.; Çelik, Ö; Charles, E.; Chekhtman, A.; Cheung, C. C.; Chiang, J.; Cillis, A. N.; Ciprini, S.; Claus, R.; Cohen-Tanugi, J.; Conrad, J.; Corbet, R.; Deklotz, M.; Dermer, C. D.; De Angelis, A.; De Palma, F.; Digel, S. W.; Di Bernardo, G.; Do Couto E Silva, E.; Drell, P. S.; Drlica-Wagner, A.; Dubois, R.; Fabiani, D.; Favuzzi, C.; Fegan, S. J.; Fortin, P.; Fukazawa, Y.; Funk, S.; Fusco, P.; Gaggero, D.; Gargano, F.; Gasparrini, D.; Gehrels, N.; Germani, S.; Giglietto, N.; Giommi, P.; Giordano, F.; Giroletti, M.; Glanzman, T.; Godfrey, G.; Grasso, D.; Grenier, I. A.; Grondin, M. H.; Grove, J. E.; Guiriec, S.; Gustafsson, M.; Hadasch, D.; Harding, A. K.; Hayashida, M.; Hays, E.; Horan, D.; Hughes, R. E.; Jóhannesson, G.; Johnson, A. S.; Johnson, R. P.; Johnson, W. N.; Kamae, T.; Katagiri, H.; Kataoka, J.; Kerr, M.; Knödlseder, J.; Kuss, M.; Lande, J.; Latronico, L.; Lemoine-Goumard, M.; Llena Garde, M.; Longo, F.; Loparco, F.; Lott, B.; Lovellette, M. N.; Lubrano, P.; Makeev, A.; Mazziotta, M. N.; McEnery, J. E.; Mehault, J.; Michelson, P. F.; Minuti, M.; Mitthumsiri, W.; Mizuno, T.; Moiseev, A. A.; Monte, C.; Monzani, M. E.; Moretti, E.; Morselli, A.; Moskalenko, I. V.; Murgia, S.; Nakamori, T.; Naumann-Godo, M.; Nolan, P. L.; Norris, J. P.; Nuss, E.; Ohsugi, T.; Okumura, A.; Omodei, N.; Orlando, E.; Ormes, J. F.; Ozaki, M.; Paneque, D.; Panetta, J. H.; Parent, D.; Pelassa, V.; Pepe, M.; Pesce-Rollins, M.; Petrosian, V.; Pinchera, M.; Piron, F.; Porter, T. A.; Profumo, S.; Rainò, S.; Rando, R.; Rapposelli, E.; Razzano, M.; Reimer, A.; Reimer, O.; Reposeur, T.; Ripken, J.; Ritz, S.; Rochester, L. S.; Romani, R. W.; Roth, M.; Sadrozinski, H. F.W.; Saggini, N.; Sanchez, D.; Sander, A.; Sgrò, C.; Siskind, E. J.; Smith, P. D.; Spandre, G.; Spinelli, P.; Stawarz; Stephens, T. E.; Strickman, M. S.; Strong, A. W.; Suson, D. J.; Tajima, H.; Takahashi, H.; Takahashi, T.; Tanaka, T.; Thayer, J. B.; Thayer, J. G.; Thompson, D. J.; Tibaldo, L.; Tibolla, O.; Torres, D. F.; Tosti, G.; Tramacere, A.; Turri, M.; Uchiyama, Y.; Usher, T. L.; Vandenbroucke, J.; Vasileiou, V.; Vilchez, N.; Vitale, V.; Waite, A. P.; Wallace, E.; Wang, P.; Winer, B. L.; Wood, K. S.; Yang, Z.; Ylinen, T.; Ziegler, M.
In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 82, No. 9, 092004, 18.11.2010.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV
AU - Ackermann, M.
AU - Ajello, M.
AU - Atwood, W. B.
AU - Baldini, L.
AU - Ballet, J.
AU - Barbiellini, G.
AU - Bastieri, D.
AU - Baughman, B. M.
AU - Bechtol, K.
AU - Bellardi, F.
AU - Bellazzini, R.
AU - Belli, F.
AU - Berenji, B.
AU - Blandford, R. D.
AU - Bloom, E. D.
AU - Bogart, J. R.
AU - Bonamente, E.
AU - Borgland, A. W.
AU - Brandt, T. J.
AU - Bregeon, J.
AU - Brez, A.
AU - Brigida, M.
AU - Bruel, P.
AU - Buehler, R.
AU - Burnett, T. H.
AU - Busetto, G.
AU - Buson, S.
AU - Caliandro, G. A.
AU - Cameron, R. A.
AU - Caraveo, P. A.
AU - Carlson, P.
AU - Carrigan, S.
AU - Casandjian, J. M.
AU - Ceccanti, M.
AU - Cecchi, C.
AU - Çelik, Ö
AU - Charles, E.
AU - Chekhtman, A.
AU - Cheung, C. C.
AU - Chiang, J.
AU - Cillis, A. N.
AU - Ciprini, S.
AU - Claus, R.
AU - Cohen-Tanugi, J.
AU - Conrad, J.
AU - Corbet, R.
AU - Deklotz, M.
AU - Dermer, C. D.
AU - De Angelis, A.
AU - De Palma, F.
AU - Digel, S. W.
AU - Di Bernardo, G.
AU - Do Couto E Silva, E.
AU - Drell, P. S.
AU - Drlica-Wagner, A.
AU - Dubois, R.
AU - Fabiani, D.
AU - Favuzzi, C.
AU - Fegan, S. J.
AU - Fortin, P.
AU - Fukazawa, Y.
AU - Funk, S.
AU - Fusco, P.
AU - Gaggero, D.
AU - Gargano, F.
AU - Gasparrini, D.
AU - Gehrels, N.
AU - Germani, S.
AU - Giglietto, N.
AU - Giommi, P.
AU - Giordano, F.
AU - Giroletti, M.
AU - Glanzman, T.
AU - Godfrey, G.
AU - Grasso, D.
AU - Grenier, I. A.
AU - Grondin, M. H.
AU - Grove, J. E.
AU - Guiriec, S.
AU - Gustafsson, M.
AU - Hadasch, D.
AU - Harding, A. K.
AU - Hayashida, M.
AU - Hays, E.
AU - Horan, D.
AU - Hughes, R. E.
AU - Jóhannesson, G.
AU - Johnson, A. S.
AU - Johnson, R. P.
AU - Johnson, W. N.
AU - Kamae, T.
AU - Katagiri, H.
AU - Kataoka, J.
AU - Kerr, M.
AU - Knödlseder, J.
AU - Kuss, M.
AU - Lande, J.
AU - Latronico, L.
AU - Lemoine-Goumard, M.
AU - Llena Garde, M.
AU - Longo, F.
AU - Loparco, F.
AU - Lott, B.
AU - Lovellette, M. N.
AU - Lubrano, P.
AU - Makeev, A.
AU - Mazziotta, M. N.
AU - McEnery, J. E.
AU - Mehault, J.
AU - Michelson, P. F.
AU - Minuti, M.
AU - Mitthumsiri, W.
AU - Mizuno, T.
AU - Moiseev, A. A.
AU - Monte, C.
AU - Monzani, M. E.
AU - Moretti, E.
AU - Morselli, A.
AU - Moskalenko, I. V.
AU - Murgia, S.
AU - Nakamori, T.
AU - Naumann-Godo, M.
AU - Nolan, P. L.
AU - Norris, J. P.
AU - Nuss, E.
AU - Ohsugi, T.
AU - Okumura, A.
AU - Omodei, N.
AU - Orlando, E.
AU - Ormes, J. F.
AU - Ozaki, M.
AU - Paneque, D.
AU - Panetta, J. H.
AU - Parent, D.
AU - Pelassa, V.
AU - Pepe, M.
AU - Pesce-Rollins, M.
AU - Petrosian, V.
AU - Pinchera, M.
AU - Piron, F.
AU - Porter, T. A.
AU - Profumo, S.
AU - Rainò, S.
AU - Rando, R.
AU - Rapposelli, E.
AU - Razzano, M.
AU - Reimer, A.
AU - Reimer, O.
AU - Reposeur, T.
AU - Ripken, J.
AU - Ritz, S.
AU - Rochester, L. S.
AU - Romani, R. W.
AU - Roth, M.
AU - Sadrozinski, H. F.W.
AU - Saggini, N.
AU - Sanchez, D.
AU - Sander, A.
AU - Sgrò, C.
AU - Siskind, E. J.
AU - Smith, P. D.
AU - Spandre, G.
AU - Spinelli, P.
AU - Stawarz,
AU - Stephens, T. E.
AU - Strickman, M. S.
AU - Strong, A. W.
AU - Suson, D. J.
AU - Tajima, H.
AU - Takahashi, H.
AU - Takahashi, T.
AU - Tanaka, T.
AU - Thayer, J. B.
AU - Thayer, J. G.
AU - Thompson, D. J.
AU - Tibaldo, L.
AU - Tibolla, O.
AU - Torres, D. F.
AU - Tosti, G.
AU - Tramacere, A.
AU - Turri, M.
AU - Uchiyama, Y.
AU - Usher, T. L.
AU - Vandenbroucke, J.
AU - Vasileiou, V.
AU - Vilchez, N.
AU - Vitale, V.
AU - Waite, A. P.
AU - Wallace, E.
AU - Wang, P.
AU - Winer, B. L.
AU - Wood, K. S.
AU - Yang, Z.
AU - Ylinen, T.
AU - Ziegler, M.
PY - 2010/11/18
Y1 - 2010/11/18
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=78651335208&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78651335208&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.82.092004
DO - 10.1103/PhysRevD.82.092004
M3 - Article
AN - SCOPUS:78651335208
VL - 82
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
SN - 1550-7998
IS - 9
M1 - 092004
ER -