Supernovae exhibit characteristic temporal behaviors, including distinct rise times, decline rates, and plateau phases that astronomers routinely measure and model to classify different types of stellar explosions.
The retrieved papers consistently demonstrate that supernovae follow characteristic durations, light curve timescales, plateau phases, and decline rates that can be systematically modeled and categorized across various types of supernovae. There is no contradictory evidence presented regarding whether supernovae have characteristic durations.