The light curve in supernova modeled by a continuous radioactive decay   of $^{56}$Ni
  The UVOIR bolometric light curves are usually modeled by the radioactive decay. In order to model more precisely the absolute/apparent magnitude versus time relationship the continuous production of radioactive isotopes is introduced. A differential equation of the first order with separable variables is solved. 
L. Zaninetti
astro-ph.SR