Gain Notes for Revolution 617 JEM-X1: A quite normal revolution with okay gain fitting, but we can clearly see that the temperature-dependent part of the gain variation is not entirely well-fitted be the smoothing process. The Xe analysis confirms that the energy determination for this revolution is within about -4% to +2% of the ideal with regular systematic variations within this range. However, as for all revolutions, the first few science windows should be avoided in any analysis requiring very good gain determination. Since the temperature variation of the gain has tripled since the beginning of the mission, future offline calibrations, including temperature dependency, will definitely benefit this revolution when they become available in the coming year. JEM-X2: No scientific data or gain history data for this unit. CAO 5/12/2007