  One of the possible astrophysical solutions to the galactic dark matter
problem is the presence of a significant amount of ``dark'' compact objects
(MACHOs) in galactic dark matter halos. MEGA (Microlensing Exploration of the
Galaxy and Andromeda) tries to find proof for or against the presence of
compact objects in the halo of the Andromeda galaxy (M31) by looking for the
microlensing signature that would be induced by these objects. The lightcurves
presented here are preliminary and based on observations of M31 with the Isaac
Newton Telescope (INT) on La Palma during the second half of 1999.
