SN2011by 20110516.928 13.1V M.Martignoni SN2011by 20110516.929 13.1Rc M.Martignoni #Observer: Massimiliano Martignoni (MMN), Magnago, Milano, Italy #Telescope: Schmidt-Cassegrain 0.25m-f/10.0 #CCD: KAF0402ME