OGLE photometry of OGLE-TR-56 - the first extrasolar planet found with the transit method - was corrected for small systematic errors with Kruszewski and Semeniuk (2003) software. The dataset includes all observations collected up to June 20, 2003. Additional transit was observed on June 20, 2003 for refinment of the ephemeris.
The most recent ephemeris, based now on more than 600 cycles:
HJD_min = 2452075.10510 + 1.211925 E.
MOST RECENT PHOTOMETRIC DATA AND FINDING CHARTS are available via THIS LINK.