First results of the Auger Radio Infill SKALA Extension (ARISE)

Radio detection of extensive air showers has become a powerful technique for studying high-energy cosmic rays. To further enhance these measurements, the Pierre Auger Observatory in Argentina, one of the world`s largest cosmic-ray experiments, has been upgraded with radio antenna stations. This upgrade aims to improve the precision of air-shower energy measurements in the energy range of several tens of PeV and above.

Within this framework, a new experiment, ARISE (``Auger Radio Infill SKALA Extension''), has been deployed at the Pierre Auger Observatory. ARISE consists of six stations, each comprising three SKALA antennas installed around a surface detector in the denser infill region.

This presentation will present first air-shower measurements from ARISE recorded in coincidence with the Auger surface detector array.