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The effect of the fluorescence yield selection on the energy scales of Auger, HiRes and TA

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Vázquez Peñas, José Ramón and Rosado Vélez, Jaime and García Pinto, Diego and Arqueros Martínez, Fernando (2013) The effect of the fluorescence yield selection on the energy scales of Auger, HiRes and TA. In UHECR 2012 - International Symposium on Future Directions in UHECR Physics. EPJ Web of Conferences (53). EDP Sciences. ISBN 978-2-7598-1025-3

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Official URL: http://dx.doi.org/10.1051/epjconf/20135310002




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.


Item Type:Book Section
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© Owned by the authors, published by EDP Sciences, 2013.
ESSN: 2100-014X
This work has been supported by the former Ministerio de Ciencia e Innovación (FPA2009-07772 and CONSOLIDER CPAN CSD2007-42). Data of the fluorescence yield and optical efficiency of TA have been kindly provided by Y. Tsunesada and D. Ikeda. Fruitful discussions with our colleagues of the Auger collaboration are acknowledged.
International Symposium on Future Directions in Ultra High Energy Cosmic Ray Physics (2012. Ginebra, Suiza).

Uncontrolled Keywords:Cosmic-rays; Air; Dependence
Subjects:Sciences > Physics > Nuclear physics
ID Code:32659
Deposited On:29 Jul 2015 08:26
Last Modified:10 Dec 2018 14:58

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