The th International Cosmic Ray Conference Testing The HiRes Detector Simulation Against UHECR Data

The High Resolution Fly s Eye Experiment uses a realistic Monte Carlo program to determine its aperture and resolution We have developed a detailed simulation of the detector response which allows us to generate events that can be compared directly against real data by reconstructing them with the same analysis programs We use a library of proton and iron induced air showers generated with the CORSIKA and QGSJet programs plus a database where conditions that change on a night to night basis are tabulated to simulate the exact data set under study Background light is added to make pattern recognition and event reconstruction be directly comparable to the data We present a detailed set of comparisons between Monte Carlo generated events and actual data taken by the HiRes FADC detector