Cosmic Ray Solar Modulation Studies at the Pierre Auger Observatory

THE PIERRE AUGER COLLABORATION (AUTOR 434 DE 474); M. TUEROS

Lodz, Polonia

Conferencia; 31st International Cosmic Ray Conference; 2009

Since data-taking began in January 2004,the Pierre Auger Observatory has been recording low energy threshold rates for the self-calibration of its surface detectors. After atmospheric corrections are applied, solar modulation and transient events are observed. In this study, we present an analysis of the available data, with special emphasis on the observation of Forbush Decreases. A strong correlation with neutron monitor rates is found. The high total count rates allow us to determine temporal variations of solar origin with high accuracy.