The Pierre Auger Observatory is an international cosmic ray observatory designed to detect ultra-high-energy cosmic rays: sub-atomic particles traveling at the speed of light and each with energies beyond 1018 eV. In Earth atmosphere, such particle interacts with air nuclei and produces various other particles. These effect particles (called an “air shower”) can be detected and measured. But since these high energy particles have an estimated arrival rate of just 1 per km2 per century, the Auger Observatory has created a detection area of 3,000 km2 in order to record a large number of these events. It is located in the western Mendoza Province, Argentina, near the Andes.
|The Pierre Auger Collaboration||Measurement of the proton-air cross section at sqrt(s)=57 TeV with the Pierre Auger Observatory||Phys.Rev.Lett. 109, 062002, 2012.||[link]|
|The Pierre Auger Collaboration||Measurement of the energy spectrum of cosmic rays above 10^18 eV using the Pierre Auger Observatory||Physics Letters B 685, 239-246, 2010.||[link]|
|The Pierre Auger Collaboration||Correlation of the highest-energy cosmic rays with nearby extragalactic objects||Science 318 (5852), 938-943, November 9 2007.||[link]|