Energy calibration of data recorded with the surface detectors of the Pierre Auger Observatory:an update

摘要

The energy of the primary particles of air showers recorded using the water-Cherenkov detectors of the PierreAuger Observatory is inferred from simultaneous measurements of showers with those detectors together with the flu-orescencetelescopes. The signal on the ground at 1000 m from the shower axis obtained using the water-Cherenkovdetectors is related directly to the calorimetric energy measured with the telescopes. The energy assignment is thereforeindependent of air shower simulations except for the assumptions that must be made about the energy carried into theground by neutrinos and muons. The correlation between the signal at the ground and the calorimetric energy is used toderive a calibration curve. Taking advantage of increased statistics with respect to previous publications we present anupdate and improvement of the method used to determine the energy scale. The systematic uncertainties of the calibrationprocedure are addressed.