Measurement of the Cosmic Ray e++e- Spectrum from 20GeV to 1TeV with the Fermi Large Area Telescope
2009 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 102, no 18Article in journal (Refereed) Published
Designed as a high-sensitivity gamma-ray observatory, the Fermi Large Area Telescope is also an electron detector with a large acceptance exceeding 2m2sr 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.
Place, publisher, year, edition, pages
2009. Vol. 102, no 18
Subatomic Physics Astronomy, Astrophysics and Cosmology
Research subject Astronomy
IdentifiersURN: urn:nbn:se:su:diva-28875DOI: 10.1103/PhysRevLett.102.181101ISI: 000265948600011OAI: oai:DiVA.org:su-28875DiVA: diva2:227509