The Fluorescence Detector of the Pierre Auger Observatory
The Pierre Auger Collaboration: J. Abraham, P. Abreu, M. Aglietta, C., Aguirre, E.J. Ahn, D. Allard, I. Allekotte, J. Allen, P. Allison, J., Alvarez-Mu\~niz, M. Ambrosio, L. Anchordoqui, S. Andringa, A. Anzalone, C., Aramo, E. Arganda, S. Argir\`o, K. Arisaka, F. Arneodo
TL;DR
The paper details the design, components, calibration, operation, and performance evaluation of the fluorescence detector at the Pierre Auger Observatory, which measures cosmic ray air showers through nitrogen fluorescence in the atmosphere.
Contribution
It provides a comprehensive description of the fluorescence detector's design, calibration, and performance assessment for ultra-high energy cosmic ray detection.
Findings
Detector components and optical system described
Calibration methods and system performance evaluated
Shower reconstruction precision analyzed
Abstract
The Pierre Auger Observatory is a hybrid detector for ultra-high energy cosmic rays. It combines a surface array to measure secondary particles at ground level together with a fluorescence detector to measure the development of air showers in the atmosphere above the array. The fluorescence detector comprises 24 large telescopes specialized for measuring the nitrogen fluorescence caused by charged particles of cosmic ray air showers. In this paper we describe the components of the fluorescence detector including its optical system, the design of the camera, the electronics, and the systems for relative and absolute calibration. We also discuss the operation and the monitoring of the detector. Finally, we evaluate the detector performance and precision of shower reconstructions.
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