Designed as a high-sensitivity gamma-ray observatory, the Fermi Large Area Telescope is also an electron detector with a large acceptance exceeding 2  m2 sr at 300 GeV. Building on the gamma-ray analysis, we have developed an efficient electron detection strategy which provides sufficient background rejection for measurement of the steeply falling electron spectrum up to 1 TeV. Our high precision data show that the electron spectrum falls with energy as E-3.0 and does not exhibit prominent spectral features. Interpretations in terms of a conventional diffusive model as well as a potential local extra component are briefly discussed.

Measurement of the Cosmic Ray e+ + e- spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope.

BALDINI, LUCA;MASSAI, MARCO MARIA;RAZZANO, MASSIMILIANO;
2009

Abstract

Designed as a high-sensitivity gamma-ray observatory, the Fermi Large Area Telescope is also an electron detector with a large acceptance exceeding 2  m2 sr at 300 GeV. Building on the gamma-ray analysis, we have developed an efficient electron detection strategy which provides sufficient background rejection for measurement of the steeply falling electron spectrum up to 1 TeV. Our high precision data show that the electron spectrum falls with energy as E-3.0 and does not exhibit prominent spectral features. Interpretations in terms of a conventional diffusive model as well as a potential local extra component are briefly discussed.
A. A., Abdo; 1, ; M., Ackermann; M., Ajello; W. B., Atwood; M., Axelsson; 5, ; Baldini, Luca; J., Ballet; G., Barbiellini; D., Bastieri; M., Battelino; B. M., Baughman; K., Bechtol; R., Bellazzini; B., Berenji; R. D., Blandford; E. D., Bloom; G., Bogaert; E., Bonamente; A. W., Borgland; J., Bregeon; A., Brez; M., Brigida; P., Bruel; T. H., Burnett; G. A., Caliandro; R. A., Cameron; P. A., Caraveo; P., Carlson; J. M., Casandjian; C., Cecchi; E., Charles; A., Chekhtman; C. C., Cheung; J., Chiang; 3 S., Ciprini; R., Claus; J., Cohen Tanugi; L. R., Cominsky; J., Conrad; 3, ; S., Cutini; C. D., Dermer; A., Deangelis; F., Depalma; S. W., Digel; I., Bernardo; E., Docoutoesilva; P. S., Drell; R., Dubois; D., Dumora; Y., Edmonds; C., Farnier; C., Favuzzi; W. B., Focke; M., Frailis; Y., Fukazawa; S., Funk; P., Fusco; Gaggero, 1. D.; Gargano, 7. F.; Gasparrini, 1. 9. D.; N., Gehrels; 3, ; Germani, 3. 3. S.; B., Giebels; N., Giglietto; F., Giordano; T., Glanzman; G., Godfrey; D., Grasso; A., Grenier; M. H., Grondin; J. E., Grove; L., Guillemot; S., Guiriec; 3., Hanabata; A. K., Harding; R. C., Hartman; M., Hayashida; 3 E., Hays; Hughes, 2. 3. R. E.; 14 G., J´ohannesson; Johnson, 3. A. S.; Johnson, 3. R. P.; Johnson, 4. W. N.; Kamae, 2. T.; 3 H., Katagiri; Kataoka, 3. 2. J.; Kawai, 3. 5. N.; 36, ; Kerr, 3. 7. M.; Kn¨ odlseder, 2. 0. J.; Kocevski, 3. 8. D.; Kuehn, 3. F.; Kuss, 1. 4. M.; 7 J., Lande; 3 L., Latronico; 7 M., Lemoine Goumard; 30, ; 31 F., Longo; 9, ; 10 F., Loparco; 18, ; 19 B., Lott; 30, ; 31 M. N., Lovellette; Lubrano, 2. P.; 16, ; 17 G. M., Madejski; 3 A., Makeev; 22, ; Massai, MARCO MARIA; Mazziotta, 7. M. N.; 19 W., Mcconville; 23, ; 33 J. E., Mcenery; 23 C., Meurer; 5, ; 26 P. F., Michelson; 3 W., Mitthumsiri; 3 T., Mizuno; 32 A. A., Moiseev; 39, 33; † C., Monte; 18, ; Monzani, 1. 9. M. E.; Moretti, 3. E.; 9, ; Morselli, 1. 0. A.; Moskalenko, 4. 0. I. V.; Murgia, 3. S.; 3 P. L., Nolan; Norris, 3. J. P.; Nuss, 4. 1. E.; Ohsugi, 2. 4. T.; Omodei, 3. 2. N.; Orlando, 7. E.; Ormes, 4. 2. J. F.; Ozaki, 4. 1. M.; 43 D., Paneque; Panetta, 3. J. H.; 3 D., Parent; 30, ; 31 V., Pelassa; Pepe, 2. 4. M.; 16, ; 17 M., Pesce Rollins; Piron, 7. F.; 24 M., Pohl; Porter, 4. 4. T. A.; Profumo, 4. S.; Rain` o, 4. S.; 18, ; Rando, 1. 9. R.; 11, ; Razzano, Massimiliano; Reimer, 7. A.; Reimer, 3. O.; 3 T., Reposeur; 30, ; Ritz, 3. 1. S.; 23, ; 33 L. S., Rochester; Rodriguez, 3. A. Y.; Romani, 4. 5. R. W.; Roth, 3. M.; Ryde, 2. 0. F.; 5, ; 13 H. F. W., Sadrozinski; Sanchez, 4. D.; 15 A., Sander; 14 P. M., Sazparkinson; Scargle, 4. J. D.; Schalk, 4. 6. T. L.; 4 A., Sellerholm; 5, ; 26 C., Sgr` o; Smith, 7. D. A.; 30, ; 31 P. D., Smith; 14 G., Spandre; 7 P., Spinelli; 18, ; 19 J. L., Starck; 8 T. E., Stephens; Strickman, 2. 3. M. S.; Strong, 2. A. W.; Suson, 4. 2. D. J.; Tajima, 4. 7. H.; Takahashi, 3. H.; Takahashi, 3. 2. T.; 43 T., Tanaka; Thayer, 3. J. B.; Thayer, 3. J. G.; Thompson, 3. D. J.; Tibaldo, 2. 3. L.; 11, ; Tibolla, 1. 2. O.; Torres, 4. 8. D. F.; 49, ; 45 G., Tosti; 16, ; Tramacere, 1. 7. A.; 50, ; 3 Y., Uchiyama; Usher, 3. T. L.; Vanetten, 3. A.; 3 V., Vasileiou; 23, ; Vilchez, 5. 1. N.; 38 V., Vitale; 40, ; Waite, 5. 2. A. P.; Wallace, 3. E.; Wang, 2. 0. P.; Winer, 3. B. L.; Wood, 1. 4. K. S.; Ylinen, 2. T.; 53,
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/206071
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 917
  • ???jsp.display-item.citation.isi??? 791
social impact