| Resumen |
Construction ofthe first stage ofthe Pierre Auger Observatory has begun. The aim ofthe Observatory is to collect
unprecedented information about cosmic rays above 1018 eV: The first phase ofthe project, the construction and operation
ofa prototype system, known as the engineering array, has now been completed. It has allowed all ofthe sub-systems that
will be used in the full instrument to be tested under field conditions. In this paper, the properties and performance of these
sub-systems are described and their success illustrated with descriptions ofsome ofthe events recorded thus far. |
