Calibration of the absolute amplitude scale of the Tunka Radio Extension (ICRC 2015)
R. Hiller, P.A. Bezyazeekov, N.M. Budnev, O.A. Gress, A. Haungs, T., Huege, Y. Kazarina, M. Kleifges, E.N. Konstantinov, E.E. Korosteleva, D., Kostunin, O. Kr\"omer, L.A. Kuzmichev, N. Lubsandorzhiev, R.R. Mirgazov, R., Monkhoev, A. Pakhorukov, L. Pankov, V.V. Prosin

TL;DR
This paper details the calibration process of the Tunka-Rex radio array, establishing a consistent absolute amplitude scale across multiple experiments, and compares measurements with simulations to validate the calibration accuracy.
Contribution
It introduces a calibration method for Tunka-Rex's antennas using a commercial reference source, aligning its scale with LOPES and LOFAR, and resolves previous measurement discrepancies.
Findings
Calibration achieved with 18% scale uncertainty.
Radio measurements agree with CoREAS simulations.
Established a consistent absolute amplitude scale across experiments.
Abstract
The Tunka Radio Extension (Tunka-Rex) is an array of 44 radio antenna stations, distributed over 3 km, constituting a radio detector for air showers with an energy threshold around 10 eV. It is an extension to Tunka-133, an air-Cherenkov detector in Siberia, which is used as an external trigger for Tunka-Rex and provides a reliable reconstruction of energy and shower maximum. Each antenna station consists of two perpendicularly aligned active antennas, called SALLAs. An antenna calibration of the SALLA with a commercial reference source enables us to reconstruct the detected radio signal on an absolute scale. Since the same reference source was used for the calibration of LOPES and, in a calibration campaign in 2014, also for LOFAR, these three experiments now have a consistent calibration and, therefore, absolute scale. This was a key ingredient to resolve a longer…
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Taxonomy
TopicsAstrophysics and Cosmic Phenomena · Radio Astronomy Observations and Technology · Computational Physics and Python Applications
