X-ray data are shifted slightly to fit the theoretical curve

references 

X-ray data: "A remarkable recurrent nova in M 31: The predicted 2014 outburst in X-rays with Swift" M. Henze, J.-U. Ness, M. J. Darnley, M. F. Bode, S. C. Williams, A. W. Shafter, G. Sala, M. Kato, I. Hachisu, M. Hernanz, 2015, AA, in press (arXiv: 1504.06237)
Optical data: "A remarkable recurrent nova in M 31: Discovery and optical/UV observations of the predicted 2014 eruption" M. J. Darnley, M. Henze,,,, I. Hachisu,,,, M.Kato, S. Kiyota,, H.Maehara,,,,,, (total 21 authors), 2015, AA, in press (arXiv: 1506.04202)
light curve model: " Multi-wavelength light curve model of the one-year recurrence period nova M31N2008-12a" Mariko Kato, Hideyuki Saio, and Izumi Hachisu, 2015, ApJ, in press, (arXiv: 1506.05364)

(c) 2015 Mariko Kato