Atmospheric aerosol attenuation effect on FD data analysis at the Pierre Auger Observatory
Autor: | Laura Valore |
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Rok vydání: | 2019 |
Předmět: |
Pierre Auger Observatory
High Energy Astrophysical Phenomena (astro-ph.HE) 010308 nuclear & particles physics Physics QC1-999 Flatness (systems theory) Attenuation FOS: Physical sciences Laser 01 natural sciences High Energy Physics - Experiment law.invention Aerosol High Energy Physics - Experiment (hep-ex) law 0103 physical sciences Environmental science Central Laser Facility Astrophysics - Instrumentation and Methods for Astrophysics Astrophysics - High Energy Astrophysical Phenomena 010303 astronomy & astrophysics Event (particle physics) Instrumentation and Methods for Astrophysics (astro-ph.IM) Energy (signal processing) Remote sensing |
Zdroj: | EPJ Web of Conferences, Vol 210, p 05008 (2019) |
DOI: | 10.48550/arxiv.1905.05439 |
Popis: | The atmospheric aerosol monitoring system of the Pierre Auger Observatory has been operating smoothly since 2004. Two laser facilities (Central Laser Facility, CLF and eXtreme Laser Facility, XLF) fire sets of 50 shots four times per hour during FD shifts to measure the highly variable hourly aerosol attenuation to correct the longitudinal UV light profiles of the Extensive Air Showers detected by the Fluorescence Detector. Hourly aerosol attenuation loads (Vertical Aerosol Optical Depth) are used to correct the measured profiles. Two techniques are used to determine the aerosol profiles, which have been proven to be fully compatible. The uncertainty in the VAOD profiles measured consequently leads to an uncertainty on the energy and on the estimation of the depth at the maximum development of a shower (X max ) of the event in analysis. To prove the validity of the aerosol attenuation measurements used in FD event analysis, the flatness of the ratio of reconstructed SD to FD energy as a function of the aerosol transmission to the depth of shower maximum has been verified. Comment: 6 pages, 10 figures, poster at UHECR 2018 (Paris, Oct 2018) |
Databáze: | OpenAIRE |
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