Reconstruction performance of simulated events with the SD-433: a WCD+UMD analysis

N. GONZÁLEZ; D. RAVIGNANI; M. ROTH; F. SÁNCHEZ; A. ALMELA; B. ANDRADA; A. M. BOTTI; A. ETCHEGOYEN; J. M. FIGUEIRA; A. FUSTER; B. GARCÍA; F. GESUALDI; M. R. HAMPEL; J. HULSMAN; A. LUCERO; D. MELO; S. MÜLLER; M. PERLIN; M. PLATINO; M. RONCORONI; C. SARMIENTO-CANO; D. SCHMIDT; M. SCORNAVACCHE; G. SILLI; A. TABOADA; B. WUNDHEILER

PUBLICACION INTERNA DE LA COLABORACION INTERNACIONAL AUGER

Pierre Auger Observatory

Año: 2019

2250-835X

Energies between fewtens and fewhundred PeV. This region of the spectrum is accessible by the SD-433, the most dense SD array in Auger. Currently, this array is composed by 16 stations separated by 433m with the foreseen addition of three newones, completing two crowns around the SD station 1764, which is equipped with a 60m2 Underground Muon Detector station. In this note, we assess the performance of the current reconstruction procedure using simulated events. We show that a core position resolution of 21 m, an angular resolution of 0.7 deg and an energy resolution of 13% can be attained at 0.1 EeV, making the SD-433 an array fitted for composition and spectrum studies. By classifying events between muon-poor and muon-rich employing the observable Mb, we show that the bias in the reconstructed energy with the SD-433 is proportional to the high-energy muon content of the air showers.