Example of the consistency of follow-up observations made of the same transit on the night of 2010/08/28 by different telescopes. This is an example of a “regular” transit. Lighter yellow dots are for the data taken at the INT (this work), whereas the darker brown ones for those taken by F. Hormuth (ETD) at the CAHA 1.23 m. The agreement between the two datasets is not very good. The difference in depth between the two datasets is partly due to different filters used, Strömgren y and Johnson R, respectively. The vertical line represents the expected transit minimum time.