  We are using the Isaac Newton Telescope Wide Field Camera to survey open
cluster fields for transiting hot Jupiter planets. Clusters were selected on
the basis of visibility, richness of stars, age and metallicity. Observations
of NGC 6819, 6940 and 7789 began in 1999 and continued in 2000. We have
developed an effective matched-filter transit-detection algorithm which has
proved its ability to identify very low amplitude eclipse events in real data.
Here we present our results for NGC 6819. We have identified 7 candidates
showing transit-like events. Colour information suggests that most of the
companion bodies are likely to be very-low-mass stars or brown dwarfs,
intrinsically interesting objects in their own right.
