Gain Notes for Revolution 498
	
JEM-X1: A quite normal revolution with fine gain fitting. All the data from 
this revolution should be useable. The Xe line analysis confirms that the
energy correction is good to within 3% of the ideal value. However, as usual
users are warned to avoid the first few science windows in the revolution
where the unit is warming up and the gain variations across the detector plate
are changing quite rapidly, especially where correct gain determination is
critical. Since there are quite large temperature variations during this
revolution, the energy determination could probably benefit from the 
introduction of temperature dependence in the gain modelling later this year.

JEM-X2: No scientific data or gain history for this unit.

CAO 4/1/2008