First proof-of-principle measurement of muons in inclined air showers using radio and water Cherenkov detectors at the Pierre Auger Observatory.

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The Fluorescence Detector (FD) of the Pierre Auger Observatory has been detecting elves with a dedicated trigger since 2013, and its 100 ns time resolution enables unprecedented precision in resolving their internal structure.
2026 International Day of Women and Girls in Science
Auger's Women and Young Researchers groups organized an online call for all collaborations to mark the International Day of Women and Girls in Science, February 11, 2026
The City of Malargüe has passed a resolution by which two streets of Malargüe have been named in honour of our colleagues Alan Watson and David Nitz
Physics Magazine featured our PRL paper on the energy spectrum.
New measurements from an observatory in Argentina suggest that all the most energetic cosmic rays arise from the same types of extragalactic accelerators.
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