The aperture for UHE tau neutrinos of the Auger fluorescence detector using a Digital Elevation Map
arXiv:astro-ph/0508038 · doi:10.1016/j.physletb.2006.01.067
Abstract
We perform a new study of the chances of the fluorescence detector (FD) at the Pierre Auger Observatory to detect the tau leptons produced by Earth-skimming ultra high energy tau neutrinos. We present a new and more detailed evaluation of the effective aperture of the FD that considers a reliable fiducial volume for the experimental set up. In addition, we take into account the real elevation profile of the area near Auger. We find a significant increase in the number of expected events with respect to the predictions of a previous semi-analytical determination, and our results show the enhancement effect for neutrino detection from the presence of the near mountains.
13 pages, 4 figures. One new figure, clarifying remarks and references added. Version accepted for publication