Tau neutrino search with the MAGIC telescope

Understand

The MAGIC telescope located on the Roque de los Muchachos on the Canary Island La Palma at a height of 2200 m a.s.l.

• is able to point to the sea.
• This permits a search for air shower signatures induced by particles coming out of the Earth.
• An analytical approximation results in tau neutrino effective areas from ~10^3 m^2 (at 100 TeV) to 10^5 m^2 (at 1 EeV) for an observation angle of about 1 degree below the horizon, rapidly diminishing with further inclination.