Measurement of the cosmic-ray energy spectrum above $2.5\times 10^{18}$ eV using the Pierre Auger Observatory

The Pierre Auger Collaboration, A. Aab, P. Abreu +380

We report a measurement of the energy spectrum of cosmic rays for energies above $2.5\times 10^{18}$eV based on 215,030 events recorded with zenith angles below $60^{\circ }$. A k…