[{"type":"article-journal","title":"Radio measurements of the energy and the depth of the shower maximum of cosmic-ray air showers by Tunka-Rex","issued":{"date-parts":[["2016"]]},"volume":"2016","issue":"1","page":"052","container-title":"Journal of cosmology and astroparticle physics","DOI":"10.1088\/1475-7516\/2016\/01\/052","author":[{"family":"Tunka-REX Collaboration"},{"family":"Bezyazeekov","given":"P. A."},{"family":"Budnev","given":"N. M."},{"family":"Gress","given":"O. A."},{"family":"Haungs","given":"A."},{"family":"Hiller","given":"R."},{"family":"Huege","given":"T."},{"family":"Kazarina","given":"Y."},{"family":"Kleifges","given":"M."},{"family":"Konstantinov","given":"E. N."},{"family":"Korosteleva","given":"E. E."},{"family":"Kostunin","given":"D."},{"family":"Kr\u00f6mer","given":"O."},{"family":"Kuzmichev","given":"L. A."},{"family":"Lubsandorzhiev","given":"N."},{"family":"Mirgazov","given":"R. R."},{"family":"Monkhoev","given":"R."},{"family":"Pakhorukov","given":"A."},{"family":"Pankov","given":"L."},{"family":"Prosin","given":"V. V."},{"family":"Rubtsov","given":"G. I."},{"family":"Schr\u00f6der","given":"F. G."},{"family":"Wischnewski","given":"R."},{"family":"Zagorodnikov","given":"A."}],"ISSN":"1475-7516","abstract":"We reconstructed the energy and the position of the shower maximum of air showers with energies E & 100PeV applying a method using radio measurements performed with Tunka-Rex. An event-to-event comparison to air-Cherenkov measurements of the same air showers with the Tunka-133 photomultiplier array confirms that the radio reconstruction works reliably. The Tunka-Rex reconstruction methods and absolute scales have been tuned on CoREAS simulations and yield energy and Xmax values consistent with the Tunka-133 measurements. The results of two independent measurement seasons agree within statistical uncertainties, which gives additional confidence in the radio reconstruction. The energy precision of Tunka-Rex is comparable to the Tunka-133 precision of 15 %, and exhibits a 20% uncertainty on the absolute scale dominated by the amplitude calibration of the antennas. For Xmax, this is the first direct experimental correlation of radio measurements with a different, established method. At the moment, the Xmax resolution of Tunka-Rex is approximately 40 g\/cm2. This resolution can probably be improved by deploying additional antennas and by further development of the reconstruction methods, since the present analysis does not yet reveal any principle limitations.","keyword":"ultra high energy cosmic rays, cosmic ray experiments, cosmic rays detectors","kit-publication-id":"1000053498"}]