Auger Fluorescence Detector Absolute Calibration January and June 2010

J. BRACK, R. COPE, A. DOROFEEV, B. GOOKIN, J. HARTON, Y. PETROV; A.C. ROVERO; R. BRUIJN, A. CRISS, P. SOMMERS, A. MENSHIKOV, G. LA ROSA

Otro; GAP note: Publicación interna del Observatorio Pierre Auger; 2010

Three recent calibration campaigns are described here. The first, in early January 2010, focused on drum intensity calibration, and represented the first use of the new calibration facility in the AB. The second and third campaigns involved absolute FD calibration, and were performedin January/February, and in June, 2010. The June calibration trip had the primary goals of repeating the January FD calibration for some cameras and establishing systematic uncertainties for several parameters. The trip was successful in this regard, and in addition drum data were taken at three pulse widths and three intensities at 16 cameras. The resulting calibration is within 1- of the existing DB, with average camera calibration increases of 5, 6, 5, and 1% at LL, LM, LA, and Co, respectively.