After S Swordy (Chicago)

Trans-GZK event detected at Haverah Park

Heck et al. Hamburg Conference 2001

Schematic idea of Fly’s Eye Detector (University of Utah)

Largest Fly’s Eye event: 3 x 10^20 eV

Results of AGASA group: Hamburg 2001

Summary of Spectrum post-Hamburg 2001

Arrival Direction Data of AGASA Group

Ave et al. Astroparticle Physics 14 91 2000

Ave et al. PRL 85 2244 2000

Comparison of Haverah Park photon limit with theory

Diagram by Enrique Zas (Santiago de Compostela)

Picture by Peter Walker

First threefold signal from Auger Surface Detector

Working on a tank in the Pampa

Aperture and camera of FD system at Los Leones

An early event in the fluorescence detector

Conclusions There are many reasons to be intrigued by the highest energy cosmic rays that justify discussion of this topic at a meeting entitled ‘Particle Physics at the Limits’ Large increases in data and fresh particle physics input are needed. The Engineering Array of the Pierre Auger Observatory has been operated sucessfully.