Abstract
The Tunka-Radio extension (Tunka-Rex) is a radio detector for air showers in Siberia. From 2012 to 2014, Tunka-Rex operated exclusively together with its host experiment, the air-Cherenkov array Tunka-133, which provided trigger, data acquisition, and an independent air-shower reconstruction. It was shown that the air-shower energy can be reconstructed by Tunka-Rex with a precision of 15\% for events with signal in at least 3 antennas, using the radio amplitude at a distance of 120\,m from the shower axis as an energy estimator. Using the reconstruction from the host experiment Tunka-133 for the air-shower geometry (shower core and direction), the energy estimator can in principle already be obtained with measurements from a single antenna, close to the reference distance. We present a method for event selection and energy reconstruction, requiring only one antenna, and achieving a precision of about 20\%. This method increases the effective detector area and lowers thresholds for zenith angle and energy, resulting in three times more events than in the standard reconstruction.
Highlights
The Tunka-Radio extension (Tunka-Rex) is a radio detector for air showers in Siberia
In this work we present a novel method for reconstructing the air-shower energy with a single antenna station
The systematic uncertainty on this measurement certainly increases with higher distance from the shower axis, and a question answered here is at which distance this uncertainty becomes the limiting factor
Summary
In this work we present a novel method for reconstructing the air-shower energy with a single antenna station. This optimizes the efficiency for energy reconstruction and allows for a minimal density of radio antennas. Details on the overview given here can be found inf Ref. Details on the overview given here can be found inf Ref. [11]
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