RN light curves superposed. The light curves from Figure
40 have been shifted vertically and horizontally so that the fitted breaks are placed at the origin. The theoretical model (with
α values of −1.75 and −3.0) are represented by the thick gray line. We see a general agreement with the "universal decline
law" of Hachisu & Kato (2007), for the predicted early- and late-time slopes as displayed by the labeled line segments. This
agreement is not perfect, as the RN light curves show variations around the simple predicted broken power law. Part of the
reason is that the observations are using the
V band which includes bright emission line flux (starting during the transition region), whereas the theoretical prediction
is for continuum flux alone.