Energy estimation of cosmic rays with the Engineering Radio Array of the Pierre Auger Observatory

The Auger Engineering Radio Array (AERA) is part of the Pierre Auger Observatory and is used to detect the radio emission of cosmic-ray air showers. These observations are compared to the data of the surface detector stations of the Observatory, which provide well-calibrated information on the cosmi...

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Autor principal: Multitudinario:449
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_24700010_v93_n12_p_Multitudinario
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_24700010_v93_n12_p_Multitudinario2023-10-03T16:41:52Z Energy estimation of cosmic rays with the Engineering Radio Array of the Pierre Auger Observatory Multitudinario:449 The Auger Engineering Radio Array (AERA) is part of the Pierre Auger Observatory and is used to detect the radio emission of cosmic-ray air showers. These observations are compared to the data of the surface detector stations of the Observatory, which provide well-calibrated information on the cosmic-ray energies and arrival directions. The response of the radio stations in the 30-80 MHz regime has been thoroughly calibrated to enable the reconstruction of the incoming electric field. For the latter, the energy deposit per area is determined from the radio pulses at each observer position and is interpolated using a two-dimensional function that takes into account signal asymmetries due to interference between the geomagnetic and charge-excess emission components. The spatial integral over the signal distribution gives a direct measurement of the energy transferred from the primary cosmic ray into radio emission in the AERA frequency range. We measure 15.8 MeV of radiation energy for a 1 EeV air shower arriving perpendicularly to the geomagnetic field. This radiation energy - corrected for geometrical effects - is used as a cosmic-ray energy estimator. Performing an absolute energy calibration against the surface-detector information, we observe that this radio-energy estimator scales quadratically with the cosmic-ray energy as expected for coherent emission. We find an energy resolution of the radio reconstruction of 22% for the data set and 17% for a high-quality subset containing only events with at least five radio stations with signal. © 2016 American Physical Society. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_24700010_v93_n12_p_Multitudinario
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description The Auger Engineering Radio Array (AERA) is part of the Pierre Auger Observatory and is used to detect the radio emission of cosmic-ray air showers. These observations are compared to the data of the surface detector stations of the Observatory, which provide well-calibrated information on the cosmic-ray energies and arrival directions. The response of the radio stations in the 30-80 MHz regime has been thoroughly calibrated to enable the reconstruction of the incoming electric field. For the latter, the energy deposit per area is determined from the radio pulses at each observer position and is interpolated using a two-dimensional function that takes into account signal asymmetries due to interference between the geomagnetic and charge-excess emission components. The spatial integral over the signal distribution gives a direct measurement of the energy transferred from the primary cosmic ray into radio emission in the AERA frequency range. We measure 15.8 MeV of radiation energy for a 1 EeV air shower arriving perpendicularly to the geomagnetic field. This radiation energy - corrected for geometrical effects - is used as a cosmic-ray energy estimator. Performing an absolute energy calibration against the surface-detector information, we observe that this radio-energy estimator scales quadratically with the cosmic-ray energy as expected for coherent emission. We find an energy resolution of the radio reconstruction of 22% for the data set and 17% for a high-quality subset containing only events with at least five radio stations with signal. © 2016 American Physical Society.
format JOUR
author Multitudinario:449
spellingShingle Multitudinario:449
Energy estimation of cosmic rays with the Engineering Radio Array of the Pierre Auger Observatory
author_facet Multitudinario:449
author_sort Multitudinario:449
title Energy estimation of cosmic rays with the Engineering Radio Array of the Pierre Auger Observatory
title_short Energy estimation of cosmic rays with the Engineering Radio Array of the Pierre Auger Observatory
title_full Energy estimation of cosmic rays with the Engineering Radio Array of the Pierre Auger Observatory
title_fullStr Energy estimation of cosmic rays with the Engineering Radio Array of the Pierre Auger Observatory
title_full_unstemmed Energy estimation of cosmic rays with the Engineering Radio Array of the Pierre Auger Observatory
title_sort energy estimation of cosmic rays with the engineering radio array of the pierre auger observatory
url http://hdl.handle.net/20.500.12110/paper_24700010_v93_n12_p_Multitudinario
work_keys_str_mv AT multitudinario449 energyestimationofcosmicrayswiththeengineeringradioarrayofthepierreaugerobservatory
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