Abstract
The Large Area Telescope on board the Fermi satellite (Fermi LAT) detected more than 1.6×106 cosmic-ray electrons/positrons with energies above 60 GeV during its first year of operation. The arrival directions of these events were searched for anisotropies of angular scale extending from 10°up to 90°, and of minimum energy extending from 60 GeV up to 480 GeV. Two independent techniques were used to search for anisotropies, both resulting in null results. Upper limits on the degree of the anisotropy were set that depended on the analyzed energy range and on the anisotropy's angular scale. The upper limits for a dipole anisotropy ranged from 0.5% to 10%.
| Original language | English |
|---|---|
| Article number | 092003 |
| 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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Searches for cosmic-ray electron anisotropies with the Fermi Large Area Telescope. / Ackermann, M.; Ajello, M.; Atwood, W. B.; Baldini, L.; Ballet, J.; Barbiellini, G.; Bastieri, D.; Bechtol, K.; Bellazzini, R.; Berenji, B.; Bloom, E. D.; Bonamente, E.; Borgland, A. W.; Bouvier, A.; Bregeon, J.; Brez, A.; Brigida, M.; Bruel, P.; Buehler, R.; Burnett, T. H.; Buson, S.; Caliandro, G. A.; Cameron, R. A.; Caraveo, P. A.; Carrigan, S.; Casandjian, J. M.; Cecchi, C.; Çelik, Ö; Charles, E.; Chekhtman, A.; Cheung, C. C.; Chiang, J.; Ciprini, S.; Claus, R.; Cohen-Tanugi, J.; Conrad, J.; Cuoco, A.; Dermer, C. D.; De Angelis, A.; De Palma, F.; Digel, S. W.; Di Bernardo, G.; Do Couto E Silva, E.; Drell, P. S.; Dubois, R.; Favuzzi, C.; Fegan, S. J.; Focke, W. B.; Frailis, M.; Fukazawa, Y.; Funk, S.; Fusco, P.; Gaggero, D.; Gargano, F.; Germani, S.; Giglietto, N.; Giommi, P.; Giordano, F.; Giroletti, M.; Glanzman, T.; Godfrey, G.; Grasso, D.; Grenier, I. A.; Grove, J. E.; Guiriec, S.; Gustafsson, M.; Hadasch, D.; Harding, A. K.; Hayashi, K.; Hays, E.; Hughes, R. E.; Jóhannesson, G.; Johnson, A. S.; Johnson, W. N.; Kamae, T.; Katagiri, H.; Kataoka, J.; Kerr, M.; Knödlseder, J.; Kuss, M.; Lande, J.; Latronico, L.; Lee, S. H.; Lemoine-Goumard, M.; Llena Garde, M.; Longo, F.; Loparco, F.; Lovellette, M. N.; Lubrano, P.; Makeev, A.; Mazziotta, M. N.; McEnery, J. E.; Mehault, J.; Michelson, P. F.; 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.; Nuss, E.; Ohsugi, T.; Okumura, A.; Omodei, N.; Orlando, E.; Ormes, J. F.; Paneque, D.; Panetta, J. H.; Parent, D.; Pelassa, V.; Pepe, M.; Pesce-Rollins, M.; Piron, F.; Porter, T. A.; Profumo, S.; Rainò, S.; Rando, R.; Razzano, M.; Reimer, A.; Reimer, O.; Reposeur, T.; Ripken, J.; Ritz, S.; Roth, M.; Sadrozinski, H. F.W.; Sander, A.; Schalk, T. L.; Sgrò, C.; Siegal-Gaskins, J.; Siskind, E. J.; Smith, D. A.; Smith, P. D.; Spandre, G.; Spinelli, P.; Strickman, M. S.; Strong, A. W.; Suson, D. J.; Takahashi, H.; Takahashi, T.; Tanaka, T.; Thayer, J. B.; Thayer, J. G.; Thompson, D. J.; Tibaldo, L.; Torres, D. F.; Tosti, G.; Tramacere, A.; Uchiyama, Y.; Usher, T. L.; Vandenbroucke, J.; Vasileiou, V.; Vilchez, N.; Vitale, V.; Waite, A. P.; Wang, P.; Winer, B. L.; Wood, K. S.; Yang, Z.; Ylinen, T.; Zaharijas, G.; Ziegler, M.
In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 82, No. 9, 092003, 18.11.2010.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Searches for cosmic-ray electron anisotropies with the Fermi Large Area Telescope
AU - Ackermann, M.
AU - Ajello, M.
AU - Atwood, W. B.
AU - Baldini, L.
AU - Ballet, J.
AU - Barbiellini, G.
AU - Bastieri, D.
AU - Bechtol, K.
AU - Bellazzini, R.
AU - Berenji, B.
AU - Bloom, E. D.
AU - Bonamente, E.
AU - Borgland, A. W.
AU - Bouvier, A.
AU - Bregeon, J.
AU - Brez, A.
AU - Brigida, M.
AU - Bruel, P.
AU - Buehler, R.
AU - Burnett, T. H.
AU - Buson, S.
AU - Caliandro, G. A.
AU - Cameron, R. A.
AU - Caraveo, P. A.
AU - Carrigan, S.
AU - Casandjian, J. M.
AU - Cecchi, C.
AU - Çelik, Ö
AU - Charles, E.
AU - Chekhtman, A.
AU - Cheung, C. C.
AU - Chiang, J.
AU - Ciprini, S.
AU - Claus, R.
AU - Cohen-Tanugi, J.
AU - Conrad, J.
AU - Cuoco, A.
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 - Dubois, R.
AU - Favuzzi, C.
AU - Fegan, S. J.
AU - Focke, W. B.
AU - Frailis, M.
AU - Fukazawa, Y.
AU - Funk, S.
AU - Fusco, P.
AU - Gaggero, D.
AU - Gargano, F.
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 - Grove, J. E.
AU - Guiriec, S.
AU - Gustafsson, M.
AU - Hadasch, D.
AU - Harding, A. K.
AU - Hayashi, K.
AU - Hays, E.
AU - Hughes, R. E.
AU - Jóhannesson, G.
AU - Johnson, A. S.
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 - Lee, S. H.
AU - Lemoine-Goumard, M.
AU - Llena Garde, M.
AU - Longo, F.
AU - Loparco, F.
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 - 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 - Nuss, E.
AU - Ohsugi, T.
AU - Okumura, A.
AU - Omodei, N.
AU - Orlando, E.
AU - Ormes, J. F.
AU - Paneque, D.
AU - Panetta, J. H.
AU - Parent, D.
AU - Pelassa, V.
AU - Pepe, M.
AU - Pesce-Rollins, M.
AU - Piron, F.
AU - Porter, T. A.
AU - Profumo, S.
AU - Rainò, S.
AU - Rando, R.
AU - Razzano, M.
AU - Reimer, A.
AU - Reimer, O.
AU - Reposeur, T.
AU - Ripken, J.
AU - Ritz, S.
AU - Roth, M.
AU - Sadrozinski, H. F.W.
AU - Sander, A.
AU - Schalk, T. L.
AU - Sgrò, C.
AU - Siegal-Gaskins, J.
AU - Siskind, E. J.
AU - Smith, D. A.
AU - Smith, P. D.
AU - Spandre, G.
AU - Spinelli, P.
AU - Strickman, M. S.
AU - Strong, A. W.
AU - Suson, D. J.
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 - Torres, D. F.
AU - Tosti, G.
AU - Tramacere, A.
AU - Uchiyama, Y.
AU - Usher, T. L.
AU - Vandenbroucke, J.
AU - Vasileiou, V.
AU - Vilchez, N.
AU - Vitale, V.
AU - Waite, A. P.
AU - Wang, P.
AU - Winer, B. L.
AU - Wood, K. S.
AU - Yang, Z.
AU - Ylinen, T.
AU - Zaharijas, G.
AU - Ziegler, M.
PY - 2010/11/18
Y1 - 2010/11/18
N2 - The Large Area Telescope on board the Fermi satellite (Fermi LAT) detected more than 1.6×106 cosmic-ray electrons/positrons with energies above 60 GeV during its first year of operation. The arrival directions of these events were searched for anisotropies of angular scale extending from 10°up to 90°, and of minimum energy extending from 60 GeV up to 480 GeV. Two independent techniques were used to search for anisotropies, both resulting in null results. Upper limits on the degree of the anisotropy were set that depended on the analyzed energy range and on the anisotropy's angular scale. The upper limits for a dipole anisotropy ranged from 0.5% to 10%.
AB - The Large Area Telescope on board the Fermi satellite (Fermi LAT) detected more than 1.6×106 cosmic-ray electrons/positrons with energies above 60 GeV during its first year of operation. The arrival directions of these events were searched for anisotropies of angular scale extending from 10°up to 90°, and of minimum energy extending from 60 GeV up to 480 GeV. Two independent techniques were used to search for anisotropies, both resulting in null results. Upper limits on the degree of the anisotropy were set that depended on the analyzed energy range and on the anisotropy's angular scale. The upper limits for a dipole anisotropy ranged from 0.5% to 10%.
UR - http://www.scopus.com/inward/record.url?scp=78651278963&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78651278963&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.82.092003
DO - 10.1103/PhysRevD.82.092003
M3 - Article
AN - SCOPUS:78651278963
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 - 092003
ER -