Gain Notes for Revolution 506 JEM-X1: A quite normal revolution with fine gain fitting. All the data from this revolution should be useable. The Xe analysis confirms that the energy determination for this revolution is good, within about 2-3% of the ideal though there is a tendency for the energy correction to be a little too low rather than too high. However, as for all revolutions, the first few science windows should be avoided in any analysis requiring very good gain determination. JEM-X2: No scientific data or gain history for this unit. CAO 4/1/2008