The energy spectrum of cosmic rays above 6 PeV as measured at the Pierre Auger Observatory

Since 2004, the Pierre Auger Collaboration has measured, with unprecedented precision, one of most important features ultra-high-energy cosmic rays, energy spectrum. Located in Southern hemisphere, Observatory comprises an array 1660 water-Cherenkov detectors covering 3000 km² overlooked by 27 fluorescence telescopes. Five sets measurements have been used to reconstruct spectrum from 6 PeV beyond 100 EeV. The highest-energy events, recorded surface on a 1500 m triangular grid, are reconstructed differently depending their inclination (vertical events below 60° and inclined ones above 60°). A cross-check these is made using ‘hybrid events’, which there simultaneous detections at both least detector. Events energies 3 EeV studied nested spacing 750 Cherenkov light three high-elevation In this contribution, updated methods for reconstruction all discussed, together associated uncertainties. combination data reported construct highest energies. detailed discussion spectral will be presented.