2014 observation

This figure is taken from Fig.1 in 
"A remarkable recurrent nova in M 31: Discovery and optical/UV observations of the predicted 2014 eruption"
by M. J. Darnley, M. Henze,,,, I. Hachisu,,,, M.Kato, S. Kiyota,, H.Maehara,,,,,,  (total 21 authors), 2015, AA, in press (arXiv: 1506.04202)