The effect of the Fluorescence Yield selection on the energy scales of Auger, HiRes and TA

Abstract

The fluorescence yield data used for shower reconstruction in the Auger, HiRes and TA experiments are different, not only in the overall absolute value but also in the wavelength spectrum and the various atmospheric dependencies. The effect on the energy reconstruction of using different fluorescence yield parameterizations is discussed. In addition, the impact of a change in the fluorescence spectrum depends on the optical efficiency of the telescopes. A simple analytical procedure allows us to evaluate the combined effect of fluorescence yield and optical efficiency showing a non-negligible deviation between the energy scales of TA and Auger. However no relevant effect is found in the comparison between HiRes and Auger. Finally we show that a similar procedure could also be applied with real data.

11 pages, 2 figures, presented in the UHECR 2012 conference

References in corpus (7)

• The Fluorescence Detector of the Pierre Auger Observatory
• Measurement of the pressure dependence of air fluorescence emission induced by electrons
• Reconstruction of Longitudinal Profiles of Ultra-High Energy Cosmic Ray Showers from Fluorescence and Cherenkov Light Measurements
• Air fluorescence measurements in the spectral range 300-420 nm using a 28.5 GeV electron beam
• Temperature and Humidity Dependence of Air Fluorescence Yield measured by AIRFLY
• The impact of the air-fluorescence yield on the reconstructed shower parameters of ultra-high energy cosmic rays
• Energy spectrum of ultra high energy cosmic rays

Cited by in corpus (2)

• On the absolute value of the air-fluorescence yield
• Relevance of the fluorescence radiation in VHE gamma-ray observations with the Cherenkov technique