Pierre Auger Observatory

Hybrid Detector

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The hybrid nature of the Pierre Auger Observatory provides for two independent ways to see cosmic rays. Read More...

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Who Was Pierre Auger?

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The Pierre Auger Observatory experiment was named after Pierre Victor Auger (1899 - 1993) Read More...

What is the best match for an ultra energetic cosmic ray?

The Pierre Auger Collaboration finds an indication that some galaxies may be better partners of cosmic rays at the highest energies than others.


Inferences on Mass Composition and Tests of Hadronic Interactions from 0.3 to 100 EeV using the water-Cherenkov Detectors of the Pierre Auger Observatory

We present a new method for probing the hadronic interaction models at ultra-high energy and extracting details about mass composition.


"Physics World Top Ten Breakthrough of 2017"

The Pierre Auger Collaboration wins award of physicsworld.com: "To the Pierre Auger Observatory collaboration for showing that ultra-high-energy cosmic rays come from outside the Milky Way."


New Spokespersons for the Pierre Auger Observatory

We are very happy to announce the election of our new spokespersons at the recent collaboration meeting of the Pierre Auger Observatory.


Calibration of the Logarithmic-Periodic Dipole Antenna (LPDA) Radio Stations at the Pierre Auger Observatory using an Octocopter

In a recent calibration campaign at the Pierre Auger Observatory, the directional and frequency characteristics of the radio stations equipped with logarithmic periodic dipole antennas (LPDAs) have been determined using a remotely piloted octocopter.


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Auger On Site

Shower Simulations

shower simulation

A computer is used to construct a model of what happens in a high energy cosmic ray airshower. Read More...

Google Earth


A model of the Observatory layout was constructed, to be viewed interactively using Google Earth. Read More...

Event Display


The Pierre Auger Collaboration agreed on making 1% of its data available to the public. Read More...