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Performance of the 433 m surface array of the Pierre Auger Observatory
- Source :
- Scopus-Elsevier, Proceedings of Science, 395, pp. 1-12, Proceedings of Science, 395, 1-12
- Publication Year :
- 2021
- Publisher :
- Scuola Internazionale Superiore di Studi Avanzati, 2021.
-
Abstract
- The Pierre Auger Observatory, located in western Argentina, is the world's largest cosmic-ray observatory. While it was originally built to study the cosmic-ray flux above $10^{18.5}~$eV, several enhancements have reduced this energy threshold. One such enhancement is a surface array composed of a triangular grid of $19$ water-Cherenkov detectors separated by $433~$m (SD-433) to explore the energies down to about $10^{16}~$eV. We are developing two research lines employing the SD-433. Firstly, we will measure the energy spectrum in a region where previous experiments have shown evidence of the second knee. Secondly, we will search for ultra-high energy photons to study PeV cosmic-ray sources residing in the Galactic center. In this work, we introduce the SD-433 and we show that it is fully efficient above $5\times 10^{16}~$eV for hadronic primaries with $\theta < 45^\circ$. Using seven years of data, we present the parametrization of the lateral distribution function of measured signals. Finally, we show that an angular resolution of $1.8^\circ$ ($0.5^\circ$) can be attained at the lowest (highest) primary energies. Our study lays the goundmark for measurements in the energy range above $10^{16}~$eV by utilizing the SD-433 and thus expanding the scientific output of the Auger surface detector.
- Subjects :
- Physics
Pierre Auger Observatory
Photon
Astronomy
Astrophysics::High Energy Astrophysical Phenomena
Galactic Center
Astrophysics::Instrumentation and Methods for Astrophysics
Flux
Computational physics
Auger
Distribution function
Observatory
Experimental High Energy Physics
ddc:530
High Energy Physics
Energy (signal processing)
Subjects
Details
- Language :
- English
- ISSN :
- 18248039
- Database :
- OpenAIRE
- Journal :
- Scopus-Elsevier, Proceedings of Science, 395, pp. 1-12, Proceedings of Science, 395, 1-12
- Accession number :
- edsair.doi.dedup.....f3be247f0564709a5d9061a35cd3c6a5