# 56. International Winter Meeting on Nuclear Physics

22-26 January 2018
Bormio, Italy
Europe/Berlin timezone

## The Pierre Auger Observatory

24 Jan 2018, 12:10
30m
Bormio, Italy

#### Bormio, Italy

Overview Talk Nuclear Structure and Astrophysics

### Speaker

Dr Darko Veberic (Karlsruhe Institute of Technology)

### Description

The Pierre Auger Observatory, located on a vast, high plain in western Argentina, is the world's largest cosmic ray observatory. The objectives of the Observatory are to probe the origin and characteristics of cosmic rays with energies above $10^{17}$ eV and to study the interactions of these most energetic particles observed in nature. The Observatory design features an array of 1660 water-Cherenkov particle-detector stations spread over 3000 km$^2$, overlooked by 27 air-fluorescence telescopes. The Observatory has been in successful operation since its completion in 2008 and has recorded data from an exposure exceeding 80,000 km$^2$ sr yr. We will give a short historical overview of efforts in this field of research, discuss the measurement of the energy spectrum of cosmic rays, studies of the cosmic-ray mass composition, the discovery of a large-scale anisotropy in the arrival direction of cosmic rays, report on tests of hadronic interactions beyond LHC energies, multi-messenger analyses with neutral primaries and the progress and performance of the upgrade of the Observatory aimed to clarify the origin of the observed flux suppression at the ultrahigh energies.

### Primary author

Dr Darko Veberic (Karlsruhe Institute of Technology)

### Co-author

Pierre Auger Collaboration (Pierre Auger Observatory)

 Slides