code: def getsatstars(self, verbose = None):
          
          if verbose == None:
              verbose = self.verbose
          if not self.satlevel > 0:
              raise RuntimeError, "Cannot determine satstars : you gave satlevel <= 0 !" 
          if self.satstars == None:
              self.findsatstars(verbose = verbose)
          return self.satstars
docs: Returns the mask of saturated stars after finding them if not yet done.
          Intended mainly for external use.