A comparative study of type I and type II supernovae

Revised photometric data are used to compare the light and colour curves of type I and type II supernovae (SNe I, SNe II); their statistical properties are also compared. No significant difference between SNe I and SNe II has been found in their radial distribution and frequency of outbursts in spiral galaxies. The comparison of light and colour curves reveals several features common to both types and the possibility of transition between types.