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Trigger and Aperture of the Surface Detector Array of the Pierre Auger Observatory
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arxiv 1111.6764 v1 pith:HDKCMO2N submitted 2011-11-29 astro-ph.IM
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abstract
The surface detector array of the Pierre Auger Observatory consists of 1600 water-Cherenkov detectors, for the study of extensive air showers (EAS) generated by ultra-high-energy cosmic rays. We describe the trigger hierarchy, from the identification of candidate showers at the level of a single detector, amongst a large background (mainly random single cosmic ray muons), up to the selection of real events and the rejection of random coincidences. Such trigger makes the surface detector array fully efficient for the detection of EAS with energy above $3\times 10^{18}$ eV, for all zenith angles between 0$^\circ$ and 60$^\circ$, independently of the position of the impact point and of the mass of the primary particle. In these range of energies and angles, the exposure of the surface array can be determined purely on the basis of the geometrical acceptance.
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Cited by 2 Pith papers
Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record
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Search for Ultra-High-Energy Neutrinos at the Pierre Auger Observatory: New Triggers, Methods, and Constraints
astro-ph.HE 2025-07 conditional novelty 5.0 of 10
No ultra-high-energy neutrino candidates were found in Auger data from 2014 through 2021, tightening 90% confidence limits on diffuse and point-source fluxes in the 60-75 degree zenith band.
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Measurement of the cosmic-ray energy spectrum above 2.5 EeV using 19 years of operation of the Pierre Auger Observatory
astro-ph.HE 2025-07 accept novelty 4.0 of 10
After 19 years of data, the combined Auger spectrum confirms the instep feature in the ultra-high-energy cosmic-ray flux at 5.5-sigma significance.
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