Based on CORSIKA and REAS2 simulations, we investigate the dependence of geosynchrotron radio emission from extensive air showers on the energy of the primary cosmic ray and the depth of the shower maximum. It is found that at a characteristic lateral distance, the amplitude of the bandpass-filtered radio signal is directly proportional to the energy deposited in the atmosphere by the electroma...

First results concerning the performance characteristics of the HEGRA IACT array are given, based on stereoscopic observations of the Crab Nebula with four telescopes. The system provides a γ-ray energy threshold around 0.5 TeV. The Crab signal demonstrates an angular resolution of about 0.1◦. Shape cuts allow to suppress cosmic ray background by almost a factor 100, while maintaining 40% effic...

Based on CORSIKA and REAS2 simulations, we investigate the sensitivity of geosynchrotron radio emission from extensive air showers to the primary cosmic ray energy and mass. It is found that at a characteristic lateral distance, the amplitude of the bandpass-filtered radio signal is directly proportional to the energy deposited in the atmosphere by the electromagnetic cascade, with an RMS uncer...

In any EAS array, the rejection of events with shower cores outside the detector boundaries is of great importance. A large difference between the true and the reconstructed shower core positions may lead to a systematic miscalculation of some shower characteristics. Moreover, an accurate determination of the shower core position for selected internal events is important to reconstruct the prim...

A system of large-area position-sensitive multiwire proportional chambers, installed in the bottom of the central detector of the KASCADE experiment is able to observe the density distributions of extensive air shower components in the shower core. Using the method of multifractal moments, a mass sensitive parametrisation of the density distributions is given. In combination with additionally m...

Measuring the angles of muons and electrons in air showers is proposed as a method for studying the primary cosmic-ray mass composition near the knee of the cosmic-ray energy spectrum at a few 10 eV. Conventional tracking detectors at existing air shower arrays could serve this purpose, like the CRT detectors at the HEGRA array. When the average radial muon angles are examined as a function of ...

The Pierre Auger Observatory allows the measurement of both longitudinal profiles and lateral particle distributions of high-energy showers. The former trace the overall shower development, mainly of the electromagnetic component close to the core where the latter reflect the particle densities in the tail of the shower far away from the core and are sensitive to both the muonic and electromagn...

In high energy cosmic rays surface arrays, the primary energy is currently determined from the value of the lateral distribution function (LDF) at a fixed optimum distance ropt from the shower core. The value of ropt is mainly related to the geometry of the array and is, therefore, considered as fixed independently of the shower energy or direction. Here, we demonstrate that the dependence of r...