EPJ Web of Conferences (Jan 2017)

Tunka-Rex: energy reconstruction with a single antenna station

  • Hiller R.,
  • Bezyazeekov P. A.,
  • Budnev N. M.,
  • Fedorov O.,
  • Gress O. A.,
  • Haungs A.,
  • Huege T.,
  • Kazarina Y.,
  • Kleifges M.,
  • Korosteleva E. E.,
  • Kostunin D.,
  • Krömer O.,
  • Kungel V.,
  • Kuzmichev L. A.,
  • Lubsandorzhiev N.,
  • Mirgazov R. R.,
  • Monkhoev R.,
  • Osipova E. A.,
  • Pakhorukov A.,
  • Pankov L.,
  • Prosin V. V.,
  • Rubtsov G. I.,
  • Schröder F. G.,
  • Wischnewski R.,
  • Zagorodnikov A.

DOI
https://doi.org/10.1051/epjconf/201713501004
Journal volume & issue
Vol. 135
p. 01004

Abstract

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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.