UVOIR light curves of SNe 2005hk and 2012Z, over-plotted by model fits based on Arnett’s equations. The model fits provide estimates of the M_Ni, M_ej and E_K (see Sect. 4.2). Also plotted as filled cyan squares are UVOIR flux points of SN 2012Z computed using its optical and NIR photometry. These points are in excellent agreement with the UVOIR flux points of SN 2012Z, as computed using the NIR flux contribution estimated from SN 2005hk. We note that the error bars are appreciably larger for SN 2005hk, due to its larger uncertainty in distance.