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Dortmund 2021 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 54: Cosmic Rays III

T 54.2: Vortrag

Mittwoch, 17. März 2021, 16:15–16:30, Td

Follow-up of the ANITA observation of up-going high energy showers with the Fluorescence Detector of the Pierre Auger Observatory* — •Ioana Alexandra Caracas for the Pierre Auger collaboration — Bergische University Wuppertal, Gaußstraße 20, Wuppertal, Germany

The ANITA observations of two upgoing cosmic ray like showers with energies of ≃ 0.6 EeV remain unexplained. Because the Pierre Auger Observatory also has sensitivity to these phenomena, a follow up search of these events is performed. With 14 years of Fluorescence Detector(FD) data available, the post-selection exposure of the FD to upgoing showers exceeds that of ANITA by at least a factor of 10 as indicated by Monte Carlo studies. Therefore a search with the FD should be able to either confirm or significantly constrain ANITA’s observations.

Simulations of up-going extensive air showers with elevation angles of more than 20 degrees above the horizon with primary energies between 1016.5 - 1018.5 eV have been performed using CONEX. The detector response to these events is further simulated using the Auger software framework. Additionally, a large isotropic sample of downgoing and horizontal cosmic ray showers was simulated as background. Preliminary results of the detector response and sensitivity to both cosmic ray and tau leptons induced air showers scenario will be presented and discussed.

*Supported by BMBF Verbundforschung Astroteilchenphysik 05A17PX1 and 05A20PX1

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