Catalog of the Highest-Energy Cosmic Rays recorded during Phase I of Operation of the Pierre
Auger Observatory
This page provides access to the catalog of 100 highest-energy events recorded at the Pierre Auger
Observatory between 2004 January 1 and 2020 December 31. They are part of the events used in
the study of the arrival directions of events above 32 EeV published in ApJ, 935, 170, 2022.
Additionally, nine
very energetic events used in the energy calibration procedure are included. The catalog of the 109 events is discussed in ApJS, 264, 50, 2023.
Catalog dataset
The Catalog consists of a data set of 109 showers measured with the array of water-Cherenkov
detectors. In 10 of these there were also measurements made with the fluorescence detector
(hybrid events). These data are available as
two summary CSV files containing the reconstructed shower parameters, one relating to all 109
events, and another to the 10 hybrid ones.
The information contained in each summary files are:
# Catalog number
ID Event name, PAOyymmdd, indicating year, month, and day of detection
UTC time (s) Coordinated Universal Time (UTC)
Energy (EeV) Energy
θ (deg) Zenith angle
δ (deg) Declination
φ (deg) Azimuth angle
α (deg) Right ascension
t1/2(1000) (ns) Risetime of the signal at 1000 m from the core (for events with θ≤60°)
Multiplicity Number of triggered stations used in reconstruction
FD site Site of the fluorescence detector [1=Los Leones, 2=Los Morados, 3=Loma Amarilla, 4=Coihueco] (for hybrid events)
Xmax (g/cm2) Depth of the shower maximum (for hybrid events).
Explore and download the surface detector reconstruction parameters
This page provides an Event Browser that can be used to display any of the events in the
Catalog. Events can be selected by clicking on their catalog number or by selecting their name
(PAOyymmdd). Once an event is selected its characteristics can be browsed in different tabs, or
viewed with a 3D display.