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CoREAS simulations of inclined air showers predict refractive displacement of the radio-emission footprint

Gottowik, Marvin; Schlüter, Felix ORCID iD icon 1; Huege, Tim 1; Rautenberg, Julian
1 Institut für Astroteilchenphysik (IAP), Karlsruher Institut für Technologie (KIT)


Simulating the radio emission of inclined extensive air showers for a ground-based radio-antenna array we find a systematic displacement of the radio emission with respect to the Monte-Carlo shower impact point. We correct the radio-emission footprint for the asymmetries due to the superposition of geomagnetic and charge-excess radiation as well as for the early-late effect. The remaining displacement is found to be ∼1500 m along the ground plane for showers with a zenith angle of 85°, which is relevant for air shower detectors. A model describing this displacement by refraction in the atmosphere based on Snell’s law yields good agreement with our observations from CoREAS simulations. We thus conclude that the displacement is caused by refraction in the atmosphere.

Verlagsausgabe §
DOI: 10.5445/IR/1000138496
Veröffentlicht am 09.11.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Astroteilchenphysik (IAP)
Publikationstyp Proceedingsbeitrag
Publikationsdatum 18.03.2022
Sprache Englisch
Identifikator ISSN: 1824-8039
KITopen-ID: 1000138496
HGF-Programm 51.13.04 (POF IV, LK 01) Kosmische Strahlung Technologien
Erschienen in Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021) : Berlin, Germany, 12-23 July 2021
Veranstaltung 37th International Cosmic Ray Conference (ICRC 2021), Online, 12.07.2021 – 23.07.2021
Verlag Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Seiten Art.-Nr.: 277
Serie Proceedings of Science / International School for Advanced Studies ; 395
Vorab online veröffentlicht am 05.07.2021
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