code: def add_chunk(self,start,end,trig_start=0,trig_end=0):
      
      self.__chunks.append(AnalysisChunk(start,end,trig_start,trig_end))
docs: Add an AnalysisChunk to the list associated with this ScienceSegment.
      @param start: GPS start time of chunk.
      @param end: GPS end time of chunk.
      @param trig_start: GPS start time for triggers from chunk