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First analysis of inclined air showers detected by Tunka-Rex

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arxiv 1812.03724 v1 pith:OLI3B666 submitted 2018-12-10 astro-ph.IM

First analysis of inclined air showers detected by Tunka-Rex

classification astro-ph.IM
keywords tunka-rexeventsinclinedanalysisdetectedradioshowersangle
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The Tunka Radio Extension (Tunka-Rex) is a digital antenna array for the detection of radio emission from cosmic-ray air showers in the frequency band of 30 to 80 MHz and for primary energies above 100 PeV. The standard analysis of Tunka-Rex includes events with zenith angle of up to 50$^\circ$. This cut is determined by the efficiency of the external trigger. However, due to the air-shower footprint increasing with zenith angle and due to the more efficient generation of radio emission (the magnetic field in the Tunka valley is almost vertical), there are a number of ultra-high-energy inclined events detected by Tunka-Rex. In this work we present a first analysis of a subset of inclined events detected by Tunka-Rex. We estimate the energies of the selected events and test the efficiency of Tunka-Rex antennas for detection of inclined air showers.

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