Here is the  light curve of a transit of the exoplanet XO-3b, done by analyzing in comparative photometry 200 exposures with r filt, 2×2 binning and 45 sec of exposure, 10 mediated dark frames, 10 mediated flat frames, all done from the skylive telescope number for. The seeing was measured as 1.5 at 3×3 binning, the exposures are a little out of focus cause in hour experience with this telescope can help to get better (more precise and sensible) results in photometry.

Exposures done from 16:30 and 20:00 UT Time yesterday, 9 january 2010.

Exposures done by: Ivan Bellia, Franco Lanza, Aldo Pucciarelli

Data reduction: Ivan Bellia

Here the resulting light curve:

XO-3b transit light curve

Here the field of view used for retriving data:

Field of view of XO-3b

astronomia, skylive