Gain Notes for Revolution 426
	
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. 
The three big glitches on sources 1 (black/red), 2 (yellow/pink) and
3 (blue/green), are clustered suspiciously at the beginning of the revoltuion.
Though they appear to be almost simultaneous, a look at the data in more detail
reveals them to be quite independent of each other. 
We can be certain that we have not seen the first
spatially extended glitch, which would be quite a problem if it occurred, since
then a significant area of the plate would be affected simultaneously and it
would be wrong to smooth out the glitch, although it would also be very difficult
to determine the spatial extent of such a glitch. 
Users should be aware that as we reach the solar minimum particle activity
increases, and this also increases the glitch rate on the plate. While this
is easy to smooth out in the gain calibration data, it will  however, lead to a
decrease in energy resolution as these gain transients pop up randomly all over
the microstrip plate.
When glitch activity increases with decreased solar activity, we can expect more
glitches to appear close to each other in time, which will give a false impression
of the glitches being related, or changing from being localized to being
extended.

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

CAO 3/07/2008