Gain Notes for Revolution 796
	
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% of the ideal. 
However, as for all revolutions, the first few science windows should be
avoided in any analysis requiring very good gain determination. Results shown
here use OSA8.0 software and so include temperature variation in the
smoothed gain model. The general low level of the Xe line is an artifact of
the high energy cutoff at high gain, and not an indication of poor gain
correction in general.

Calibration source number 4 (purple/orange) is no longer
used for calibration purposes since an anode strip directly under the source
has broken and no useable signal comes from this area of the detector any
longer.


CAO 27/5/2009



JEM-X2: A quite normal revolution with fine gain fitting. All the data from 
this revolution should be useable. The Xe line analysis confirms the very
good gain calibration for this revolution with all except the very first Science
Windows having a Xe line position with about 1% of the ideal value.
However, it is suggested that
users avoid the first few science windows in each revolution since this is
where the instrument warms up and gain variations across the plate settle down.

The first part of this revolution has been declared a Bad Time Interval, to cut
out the period of fain settling after the instrument was switched on after a long
dormant period. BTI period is IJD = 3397.3 - 3397.8

CAO 29/5/2009