Latest news on the Observatory web site



20th Anniversary of the Foundation of the Pierre Auger Observatory

Blog "Jouney to Auger"


34th International Cosmic Rays Conference (ICRC)

Summer 2015

Based on 28 Auger proceedings at ICRC 2015,  3 jointly with the Telescope Array Collaboration and  1 with the IceCube and TA collaborations, the Pierre Auger collaboration present latest results of the studies of ultra-high energy cosmic rays:

  • Energy spectrum and mass composition (including photons and neutrinos)
  • Shower properties and hadronic models
  • Arrival directions
  • Not only cosmic rays: p-air cross-section, magnetic monopoles, solar physic

Spectre Auger ICRC2015 proceedings

Pierre Auger Observatory Time Lapse

Pierre Auger Observatory time lapse from Steven Saffi on Vimeo.

 The Pierre Auger Observatory is the largest cosmic ray detector in the world. It covers an area of 3000 square kilometers with 1660 surface detector stations which detect cosmic ray shower particles directly, as well as 27 fluorescence telescopes which overlook the atmosphere above the surface array and detect fluorescence light emitted by shower particles.
This time lapse sequence is constructed from a series of images captured in November-December 2013 by Steven Saffi.

33rd International Cosmic Rays Conference (ICRC)

July 2013

The Pierre Auger Collaboration presented its last news and results during the 33 ICRC in July 2013. The Observatory exposure is around 32 000 km2 sr yr (+50% compared to ICRC 2011) . A new energy scale has been set (+16% at 1EeV /+12% at 10 EeV), with a decrease of the systematics from 22% to 14%. The energy spectrum has been updated.

Spectre ICRC 2013


 Click here to get the arXiv paper containing all the ICRC contributions  of the Pierre Auger Observatory.


EASIER61 : the largest cosmic rays radio detector

April 2012

The detection of the extensive air showers in the radio range is a promising way to characterize the shower development in the atmosphere. The Pierre Auger Observatory explores the potential of radio-detection techniques in the GHz range.

In EASIER (Extensive Air Shower Identification using Electron Radiometer), the microwave emission is detected by antenna horns located on each surface detector. 61 antennas have been installed by a team of the LPSC and the LPNHE  at the end of march 2012 on 61 Water Cherenkov Detector, corresponding to an area of ~100 km2.