IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Measurement of the UHECR energy spectrum using data from the Surface Detector of the Pierre Auger Observatory
Autor/es:
PIERRE AUGER COLL. M. ROTH, M.T.DOVA ET AL
Lugar:
Merida, Mexico
Reunión:
Conferencia; 30th International Cosmic Ray Conference; 2007
Resumen:
At the southern site of the Pierre Auger Observatory, which is close to
completion, an exposure that significantly exceeds the largest forerunner
experiments has already been accumulated. We report a measurement of the cosmic
ray energy spectrum based on the high statistics collected by the surface
detector. The methods developed to determine the spectrum from reconstructed
observables are described. The energy calibration of the observables, which
exploits the correlation of surface detector data with fluorescence
measurements in hybrid events, is presented in detail. The methods are simple
and robust, exploiting the combination of fluorescence detector (FD) and
surface detector (SD) and do not rely on detailed numerical simulation or any
assumption about the chemical composition. Besides presenting statistical
uncertainties, we address the impact of systematic uncertainties.