33RD INTERNATIONAL COSMIC RAY CONFERENCE, RIO DE JANEIRO 2013 THE ASTROPARTICLE PHYSICS CONFERENCE A premilinary study on the effect of the latitude on the measurement of the

Abstract: Recent high precision measurements of the Ultra High Energy Cosmic-ray spectrum have been done by the Hires, Pierre Auger and Telescope Array Observatories. The agreement between the published spectra is remarkably good despite the possibility that each experiment is exposed to a different source population. If the highest energetic particles are not all heavy and if the magnetic field strength is not extreme quasi-linear propagation of particles from source to Earth is a reasonable assumption. In this work we evaluate the effect of different source population visible from different latitudes in the measured energy spectra. We simulated the propagation of particles in the Universe given a chosen composition and source distribution and studied the energy spectrum arriving on Earth