Notes. Best-fit parameters of the g′r′i′z′JH band light curve fits. We modelled g′r′i′z′J light curves with a SN1998bw template redshifted to z = 0.2825, as described in Zeh et al. (2004), which is superposed on a simple power-law or smoothly broken power-law (Beuermann et al. 1999), where α denotes the decay slope, t_b the break time, and n the smoothness, to account for the early emission and the flux from the host galaxy at the explosion site. For the H band, we used the afterglow models only. We assumed that the afterglow component evolves achromatically from the g′ to the H band. The supernova and afterglow light curve is equally well fitted with the two models. Column 2 gives the contribution of the host galaxy in the used aperture. See Sect. 3.3.2 for details.