The Planet Collaboration: Probing Lensing Anomalies
  The Probing Lensing Anomalies NETwork (PLANET) is a worldwide collaboration of astronomers using semi-dedicated European, South African, and Australian telescopes to perform continuous, rapid and precise multi-band CCD photometric monitoring of on-going Galactic microlensing events. As well as providing important additional information on the nature, distribution and kinematics of Galactic microlenses, PLANET photometry is optimized for the detection of Jovian-mass planets orbiting several AU from Galactic lenses. The final PLANET database is expected to contain hundreds of variable stars sampled at hourly time scales with 1-5% precision. 
The PLANET Collaboration: M. Albrow, J.-P. Beaulieu, P. Birch, J.A.R.   Caldwell, J. Greenhill, K. Hill, S. Kane, R. Martin,...