Gain Notes for Revolution 401 JEM-X1: An ordinary revolution with fine gain smoothing. All the data from this revolution should be useable. Data was reprocessed into Science Windows only 100 seconds long to allow for imaging with refined time resolution for the bigger instruments. The gain history and smoothing for the period during the Earth observation is shown under `Other data and results'. Again, the gain history and smoothing are fine and all the data produced during the 100 second processing should be useable. CAO 30/01/2006