Intensity on the Venusian disc in the 249 continuum filtergrams from the transit of Venus. Top: intensity as a function of distance from the centre of the Venusian disc, averaged over all azimuths and normalized to the level at the point of inflexion (dashed line), Î_r. Bottom: intensity versus azimuth along the edge of the Venusian disc as given by the point of inflexion on Î_r, normalized to the mean level, Î_φ. The red curves follow the mean Î_r and Î_φ of all the filtergrams, while the blue line represents Î_φ = 1.