Gain Notes for Revolution 1585

This is one of the later revolutions in the mission where the calibration
sources have become so weak that for the best energy determination and
IC Gain History table is needed.

NB: The last 1/3 of this revolution is heavily affected by greyfiltering
due to a strong source in the FOV. The uncertainty of the gain determination
and energy correction will be as much as 4-5% on either side of the ideal
but this is difficult to pin down due to the lack of both calibration
data and verification data. 

To get optimal results with this revolution it is necessary to use the IC gain history.
See notes in revolutions prior to revolution 1433 to find out how to do this
if you don't already know.

All offline gain/energy corrections (including the IC tables) are based on the
two Fe calibration sources in JEM-X1, for both units.

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: 

The Xe line analysis performed using the IC table shows very good gain
correction with all science windows (taken 2 at a time) having a Xe level 
within 2-3% of the ideal, except for the very first points and two misfitted
outliers where gain verification doesn't seem to be possible. 
As usual, it is recommended that users avoid the first few science 
windows for energy-sensitive applications (automatically removed by OSA 10.0).

JEM-X2: Results coming soon.

CAO 7/10/2015


	Gain Notes for Revolution 1585
	

JEM-X2: 

The Xe line analysis performed using the IC table shows excellent gain
correction with all science windows (taken      at a time) having a Xe level 
within 2% of the ideal, except for       . 
As usual however, it is recommended that users avoid the first few science 
windows for energy-sensitive applications (automatically removed by OSA 10.0).

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

CAO 7/10/2015