Speaker
Description
IceTop is the surface air-shower array of the IceCube Neutrino Observatory measuring cosmic rays in the PeV – EeV energy range. Additional detectors of scintillators and antennas are to be deployed in the IceTop footprint as part of the Surface Array Enhancement. The scintillators aim to reduce the energy threshold to the TeV regime and the antennas provide information on mass-sensitive observables such as $X_{max}$. Since early 2025, three stations, each comprising 3 antennas and 8 scintillators with an independent data acquisition system, are running in tandem with the ice-Cherenkov tanks of IceTop. First air-shower measurements measured with all 9 antennas are presented. Additionally, with the goal of calibrating the antennas with the galactic noise, the sidereal modulation of background radio data is also evaluated.