Operations of and Future Plans for the Pierre Auger Observatory

Contributions to the 31st ICRC, Lodz, Poland, July 2009International audienceTechnical reports on operations and features of the Pierre Auger Observatory, including ongoing and planned enhancements and the status of the future northern hemisphere portion of the Observatory. Contributions to the 31st International Cosmic Ray Conference, Lodz, Poland, July 2009

Studies of Cosmic Ray Composition and Air Shower Structure with the Pierre Auger Observatory

Submissions to the 31st International Cosmic Ray Conference, Lodz, Poland (July 2009)International audienceStudies of the composition of the highest energy cosmic rays with the Pierre Auger Observatory, including examination of hadronic physics effects on the structure of extensive air showers. Submissions to the 31st ICRC, Lodz, Poland (July 2009)

Astrophysical Sources of Cosmic Rays and Related Measurements with the Pierre Auger Observatory

Studies of the correlations of ultra-high energy cosmic ray directions with extra-Galactic objects, of general anisotropy, of photons and neutrinos, and of other astrophysical effects, with the Pierre Auger Observatory. Contributions to the 31st ICRC, Lodz, Poland, July 2009

Operations of and Future Plans for the Pierre Auger Observatory

Contributions to the 31st ICRC, Lodz, Poland, July 2009International audienceTechnical reports on operations and features of the Pierre Auger Observatory, including ongoing and planned enhancements and the status of the future northern hemisphere portion of the Observatory. Contributions to the 31st International Cosmic Ray Conference, Lodz, Poland, July 2009

Calibration and Monitoring of the Pierre Auger Observatory

Reports on the atmospheric monitoring, calibration, and other operating systems of the Pierre Auger Observatory. Contributions to the 31st International Cosmic Ray Conference, Lodz, Poland, July 2009

The Cosmic Ray Energy Spectrum and Related Measurements with the Pierre Auger Observatory

Studies of the cosmic ray energy spectrum at the highest energies with the Pierre Auger Observatory

The Pierre Auger Observatory III: Other Astrophysical Observations

Astrophysical observations of ultra-high-energy cosmic rays with the Pierre Auger Observator

Studies of Cosmic Ray Composition and Air Shower Structure with the Pierre Auger Observatory

Studies of the composition of the highest energy cosmic rays with the Pierre Auger Observatory, including examination of hadronic physics effects on the structure of extensive air showers. Submissions to the 31st ICRC, Lodz, Poland (July 2009)

Search for signatures of magnetically-induced alignment in the arrival directions measured by the Pierre Auger Observatory

We present the results of an analysis of data recorded at the Pierre Auger Observatory in which we search for groups of directionally-aligned events (or `multiplets') which exhibit a correlation between arrival direction and the inverse of the energy. These signatures are expected from sets of events coming from the same source after having been deflected by intervening coherent magnetic fields. The observation of several events from the same source would open the possibility to accurately reconstruct the position of the source and also measure the integral of the component of the magnetic field orthogonal to the trajectory of the cosmic rays. We describe the largest multiplets found and compute the probability that they appeared by chance from an isotropic distribution. We find no statistically significant evidence for the presence of multiplets arising from magnetic deflections in the present data