Berlin 2014 – scientific programme

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EP: Fachverband Extraterrestrische Physik

EP 1: Astrophysik

EP 1.5: Talk

Monday, March 17, 2014, 15:15–15:30, DO24 1.103

Reconstruction of externally triggered radio events with AERA 124 — •Qader Dorosti Hasankiadeh — Institut für Experimentelle Kernphysik, Karlsruher Institut für Technologie, Hermann-von-Helmholtz-Platz 1, Geb. 425 76344 Eggenstein-Leopoldshafen

The Auger Engineering Radio Array (AERA) aims to detect air showers caused by the interactions of ultra-high energy cosmic rays with the Earth atmosphere, providing complementary information on the direction, energy and composition of the cosmic rays to the Auger surface and fluorescence detectors. The second stage of the AERA, currently consisting of 124 radio stations, has been completed at the Pierre Auger Observatory in early 2013, resulting in a larger detection area. Compared with the first stage of the AERA, i.e. AERA 24, AERA 124 exploits a larger detection area, which consequently results in a larger event rate. However, a larger detection area increases the probability of noise contaminations in radio signal. We have developed a robust reconstruction strategy to select radio signals with high purity by largely suppressing noise contaminations. The selection method relies on the causality relation between the arrival time of radio signals and the incoming direction of air showers independently measured by the Auger surface detector. To this end, we have applied the reconstruction strategy on the AERA experimental data externally triggered by the surface detector. The initial analysis of the externally triggered radio events measured by AERA 124 will be presented in this talk.