Open Data

open-data fd-camera-view


The Pierre Auger Collaboration releases 10% of the data recorded using the world’s largest cosmic ray detector. These data are being made available publicly with the expectation that they will be used by a wide and diverse community including professional and citizen-scientists and for educational and outreach initiatives.

While the Auger Collaboration has released data in a similar manner for over a decade, the enhanced release is much wider with regard to both the quantity and type of data, making them suitable both for educational purposes and for scientific research.

Release of reconstructed cosmic-ray events
Example codes
selected with the best available knowledge of the detector performance and conditions at the time of data-taking. Example codes derived from those used by the Collaboration for published analyses are also provided;

Release of close-to-raw data associated with those events
An event-display
together with codes to read these data.

These links include data from the two major instruments of the Observatory, the 1500 m array of the Surface Detector and the Fluorescence Detector. The dataset consists of 10% of all the events recorded at the Observatory, subjected to the same selection and reconstruction procedures used by the Collaboration in recent publications. The periods of data recording are the same as used for the physics results presented at the International Cosmic Ray Conference held in 2019.

The examples of analyses use updated versions of the Auger data sets, which differ slightly from those used for the publications because of subsequent improvements to the reconstruction and calibration. On the other hand, as the fraction of data which is now available is currently 10% of the actual Auger data sample, the statistical significances of measured quantities are reduced with respect to what can be achieved with the full dataset, but the number of events is comparable to what was used in some of the first scientific publications by the Auger Collaboration.