Rosado Vélez, JaimeBlanco Ramos, FranciscoArqueros Martínez, Fernando2023-06-192023-06-192014-030927-650510.1016/j.astropartphys.2014.02.003https://hdl.handle.net/20.500.14352/34804© Elsevier Science BV 2014. This work was supported by MINECO (FPA2009-07772, FPA2012-39489-C04-02) and CONSOLIDER CPAN CSD2007-42. We thank our colleagues of the Auger Collaboration for fruitful discussions and comments on this work.The absolute value of the air-fluorescence yield is a key parameter for the energy reconstruction of extensive air showers registered by fluorescence telescopes. In previous publications, we reported a detailed Monte Carlo simulation of the air-fluorescence generation that allowed the theoretical evaluation of this parameter. This simulation has been upgraded in the present work. As a result, we determined an updated absolute value of the fluorescence yield of 7.9 +/- 2.0 ph/MeV for the band at 337 nm in dry air at 800 hPa and 293 K, in agreement with experimental values. We have also performed a critical analysis of available absolute measurements of the fluorescence yield with the assistance of our simulation. Corrections have been applied to some measurements to account for a bias in the evaluation of the energy deposition. Possible effects of other experimental aspects have also been discussed. From this analysis, we determined an average fluorescence yield of 7.04 +/- 0.24 ph/MeV at the above conditions. (C) 2014 Elsevier B.V. All rights reserved.engjournal articlehttp://dx.doi.org/10.1016/j.astropartphys.2014.02.003http://arxiv.org/abs/1401.4310http://www.sciencedirect.com/open access539.1Electron-impactCross-sectionsSecondary electronsCosmic-raysNitrogenPressureDetectorStateBeamNMFísica nuclear2207 Física Atómica y Nuclear