| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1846276 | Nuclear Physics B - Proceedings Supplements | 2006 | 8 Pages |
Abstract
Through a 14-year operation of the Akeno Giant Air Shower Array (AGASA), we detected about 1000 UHECRs above 1019 eV including eleven events above 1020 eV. The data indicate that the cosmic ray spectrum extends well beyond the predicted Greisen-Zatsepin-Kuzmin cutoff. In the arrival direction distribution of UHECRs, a feature of event clusters was observed which implies the presence of UHECRs from point-like sources. The signature was found that these UHECRs are deflected in the Galactic magnetic field. The composition of UHECRs is consistent with light hadrons around 1019 eV from the muon measurement and no gamma-ray dominance has been observed.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
