Evolution of the SD-433, and recovery of the 6T5 condition in events prior to July 2018

M. RONCORONI; D. MELO; D. RAVIGNANI; N. GONZÁLEZ; G. SILLI

PUBLICACION INTERNA DE LA COLABORACION INTERNACIONAL AUGER

Pierre Auger Observatory

Año: 2021

2250-835X

The SD-433 is the most recent and densest array of surface detectors at the Pierre Auger Observatory designed to extend down to 10**16.5 eV the air-shower detection with the surface technique. In this note we describe the evolution of the SD-433 from the engineering array phase to date. We describe the procedure to include the silent SD-433 stations to the raw data acquired before July 2018 which were skipped by CDAS at that time. With this method, it was possible to identify and recover the 6T5 condition in more than 148.000 events, registered during the first five years of SD-433 operation, between April 1, 2013 and June 30, 2018.