scholarly journals Muons in Air Showers at the Pierre Auger Observatory

2016 ◽  
Author(s):  
M. Unger
Keyword(s):  
Pierre Auger Observatory ◽  
Air Showers

scholarly journals Measurement of the Fluctuations in the Number of Muons in Extensive Air Showers with the Pierre Auger Observatory

2021 ◽  
Vol 126 (15) ◽  
Author(s):  
A. Aab ◽  
P. Abreu ◽  
M. Aglietta ◽  
J. M. Albury ◽  
I. Allekotte ◽  
...  
Keyword(s):  
Extensive Air Showers ◽  
Pierre Auger Observatory ◽  
Air Showers

scholarly journals Muons in air showers at the Pierre Auger Observatory: Measurement of atmospheric production depth

2014 ◽  
Vol 90 (1) ◽  
Author(s):  
A. Aab ◽  
P. Abreu ◽  
M. Aglietta ◽  
M. Ahlers ◽  
E. J. Ahn ◽  
...  
Keyword(s):  
Pierre Auger Observatory ◽  
Air Showers

scholarly journals Observation of inclined EeV air showers with the radio detector of the Pierre Auger Observatory

2018 ◽  
Vol 2018 (10) ◽  
pp. 026-026 ◽  
Author(s):  
A. Aab ◽  
P. Abreu ◽  
M. Aglietta ◽  
I.F.M. Albuquerque ◽  
J.M. Albury ◽  
...  
Keyword(s):  
Pierre Auger Observatory ◽  
Air Showers

scholarly journals Determination of the invisible energy of extensive air showers from the data collected at Pierre Auger Observatory

2019 ◽  
Vol 210 ◽  
pp. 02010
Author(s):  
Analisa G. Mariazzi ◽  
Keyword(s):  
High Energy ◽  
Primary Energy ◽  
Energy Scale ◽  
Extensive Air Showers ◽  
Pierre Auger Observatory ◽  
Mass Composition ◽  
Air Showers ◽  
Systematic Uncertainties ◽  
Muon Production ◽  
The Invisible

In order to get the primary energy of cosmic rays from their extensive air showers using the fluorescence detection technique, the invisible energy should be added to the measured calorimetric energy. The invisible energy is the energy carried away by particles that do not deposit all their energy in the atmosphere. It has traditionally been calculated using Monte Carlo simulations that are dependent on the assumed primary particle mass and on model predictions for neutrino and muon production. In this work the invisible energy is obtained directly from events detected by the Pierre Auger Observatory. The method applied is based on the correlation of the measurements of the muon number at the ground with the invisible energy of the showers. By using it, the systematic uncertainties related to the unknown mass composition and to the high energy hadronic interaction models are significantly reduced, improving in this way the estimation of the energy scale of the Observatory.

scholarly journals Atmospheric aerosol attenuation effect on FD data analysis at the Pierre Auger Observatory

2019 ◽  
Vol 210 ◽  
pp. 05008
Author(s):  
Laura Valore ◽  
Keyword(s):  
Atmospheric Aerosol ◽  
Uv Light ◽  
Pierre Auger Observatory ◽  
Event Analysis ◽  
Air Showers ◽  
Fluorescence Detector ◽  
Attenuation Effect ◽  
Laser Facility ◽  
Shower Maximum ◽  
Light Profiles

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 (Xmax) 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.

scholarly journals Depth of maximum of air-shower profiles: testing the compatibility of measurements performed at the Pierre Auger Observatory and the Telescope Array experiment

2019 ◽  
Vol 210 ◽  
pp. 01009
Author(s):  
Alexey Yushkov ◽  
Jose Bellido ◽  
John Belz ◽  
Vitor de Souza ◽  
William Hanlon ◽  
...  
Keyword(s):  
Quantitative Comparison ◽  
Pierre Auger Observatory ◽  
Array Detector ◽  
Air Showers ◽  
Fluorescence Detector ◽  
Telescope Array ◽  
Longitudinal Development ◽  
Air Shower ◽  
Direct Observations ◽  
Systematic Uncertainties

At the Pierre Auger Observatory and the Telescope Array, the measurements of depths of maximum of airshower profiles, Xmax, are performed using direct observations of the longitudinal development of showers with the help of the fluorescence telescopes. Though the same detection technique is used at both installations, the straightforward comparison of the characteristics of the measured Xmax distributions is not possible due to the different approaches to the analysis of the recorded events. In this work, the Auger – Telescope Array composition working group presents a technique to compare the Xmax measurements from the Auger Observatory and the Telescope Array. Applying this technique the compatibility of the first two moments of the measured Xmax distributions is qualitatively tested for energies 1018.2 eV < E < 1019.0 eV using the recently published Telescope Array data from the Black Rock Mesa and Long Ridge fluorescence detector stations. For a quantitative comparison, simulations of air showers with EPOS-LHC, folded with effects of the Telescope Array detector, are required along with the inclusion in the analysis of the systematic uncertainties in the measurements of Xmax and the energies of the events.

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