Observation of the spectrum with the AMIGA infill

D. RAVIGNANI, H. ASOREY, D. MELO, G. DE LA VEGA, A. ETCHEGOYEN, A. FERRERO, R.F. GAMARRA, B. GARCÍA, M. JOSEBACHUILI, F. SÁNCHEZ, I. SIDELNIK, A. TAPIA, B. WUNDHEILER

Encuentro; Pierre Auger Internal GAP Note Nº 2011-010; 2011

In this note we present the spectrum measured with the AMIGA infill featuring the no observation of a second knee break from 10^17.2 eV. The event reconstruction, constant intensity cut procedure, energy cal- ibration and exposure calculation used to obtain the spectrum are de- scribed. A few new ideas were introduced along the way including the extension of the spectrum down in energy by cutting at a zenith angle of 30º and the exclusion from the spectrum of events falling less than 100 m from a station.