Gain Notes for Revolution 2737

NB: This entire revolution is marked as a Bad Time Interval
	for the reasons listed below. BTI= 8793.0 to 8795.5 IJD
This is a revolution with very high radiation and numerous
	alerts from JEM-X amongst other instruments.
The actual amount of science data in this revolution appears
	to be very small indeed. There are few SCWs - the last half
	of the revolution has no SCWs - and the SCWs that do exist
	contain very few events. 
The Xe line cannot be found in the science data and hence the
	gain determination remains unvalidated, and it was impossible
	to correct the gain history tables. 

This is one of the later revolutions in the mission where the calibration
sources have become so weak that for the best energy determination an
IC Gain History table is needed. These gain history tables are found
automatically by OSA, or can be downloaded from the DTU FTP site.
 
All offline gain/energy corrections (including the IC tables) are based on the
two Fe calibration sources in JEM-X1, for both units, then corrected iteratively
using the instrument background lines (Xe, backed up by Cu and Mo).

Latest OSA software (version 10 and higher) automatically cuts out the first
Science windows of data from each revolution to ensure that people do not use data
from the instrument-settling period. This process can be overruled, but only by
experienced users.
	
JEM-X1 rating:  BAD throughout    BTI= 8793.0 to 8795.5 IJD 

JEM-X2 rating:  BAD throughout    BTI= 8793.0 to 8795.5 IJD

The JEM-X2 corrections are based on the JEM-X1 Fe calibration sources, since
all the Cd sources are now too weak to use.

CAO 07/02/2024