Gain Notes for Revolution 420 JEM-X1: An ordinary revolution with fine gain smoothing, despite heavy grey filtering in places. All the data from this revolution should be useable. Two outlying points on the weakest source, source 4 (purple/orange), in no way affect the gain smoothing and have no significant effect on the science data. These outliers are caused by grey filtering which is clearly seen as small breaks in the gain history curves for all four of the sources. A big glitch on source 1 (black/red), also has no effect on the gain smoothing or science data. JEM-X2: No data and no gain history for this unit CAO 27/03/2006