The south pole Askaryan Radio Array (ARA) uses radio frequency antennas buried in the ice to detect RF Cherenkov signals (through the Askaryan effect) from high energy neutrino induced showers. Working in the RF regime lets us use a large volume (~200km^3) of Antarctic ice as target material, reaching unprecedented sensitivity to extra-galactic neutrino fluxes, at energies well above any previous experiment.

Filtering out the signal neutrino events is essential in any detector where data acquisition is limited by storage and bandwidth considerations, especially one built at the south pole. We combine actual data and simulation to improve sensitivity by developing filtering tools capable of identifying weak signal events while maintaining background levels as low as possible.