Depending on the actual numbers of planetary systems and their typical planetary masses and orbital radii, a significant fraction of events are expected to exhibit detectable caustic crossings. Even outside the caustic region, the magnification pattern is disturbed by planets, producing detectable anomalies. In principle, even earth-size planets can be detected in this way. The 2001 observing season is now underway. Our longitude coverage provides the possibility of nearly continuous monitoring and a hedge against bad weather.
All sites perform their own reduction and communicate with one another almost daily.