BVRI lightcurves of supernovae SN 2011fe in M101, SN 2012aw in M95, and SN 2012cg in NGC 4424

► Densely populated, high precision lightcurves of three recent and bright SNe. ► It is easy to anticipate these SN will be intensively studied as template cases. ► A new, robust method to combine SN photometry from different telescopes is devised. ► A correction is suggested to zero-points of relations providing absolute B mag. ► Light- and color-curves and bolometric lightcurves are discussed.