The spectrum features of UHECRs below and surrounding GZK
/ Authors
V. P. Egorova, A. Glushkov, A. Ivanov, S. Knurenko, V. Kolosov, A. Krasilnikov, I. Makarov, A. Mikhailov, V. V. Olzoev, M. Pravdin
and 3 more authors
/ Abstract
The energy spectrum of ultra-high energy cosmic rays (UHECRs) is discussed on the basis of the Yakutsk array database analysis. In the region E 0 = 10 17 to 3 × 10 19 eV the showers are detected under trigger-500, while at energies above 3 × 10 19 eV the whole acceptance area for trigger-1000 is used in order to utilize all the data available in the region of Greisen-Zatsepin-Kuzmin (GZK) cutoff. Updated relations are adapted to estimate the primary energy having detected densities of charged particles at the distance 300/600 m from the shower axis.
Journal: arXiv: Astrophysics