Search for cosmic high energy down-going neutrino fluxes from point-like sources with ANTARES

Installed in the Mediterranean Sea, at a depth of ∼ 2.5 km, ANTARES is the largest undersea neutrino telescope currently operating. The search for point-like sources with neutrino telescopes is normally limited to a fraction of the sky, due to the selection of events for which the direction of the neutrino candidate has been reconstructed as coming from below the detector horizon, usually referred to as "up-going" events, in order to significantly reduce the atmospheric muons background. In this contribution we demonstrate that through an energy and direction dependent event selection the background can be effectively suppressed so that a part of the region above the horizon can be included in the search. The strategy for the study of a "down-going" neutrino flux is described and the ANTARES sensitivity is presented. No indication of a neutrino signal has been found in the analysed data and upper limits on the flux normalization of a ∝ Ev-2 energy spectrum of neutrinos from several candidate point-like sources in that region have been set.