Gain Notes for Revolution 1503

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.
 

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.

For this revolution the IC gain history tables for both instruments are based on
the Fe calibration sources in the JEM-X1 unit.

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 good gain
correction with all science windows having a Xe level 
within 2-3% of the ideal, except for the first 2 SCWs and the last one, and
one outlier at 5% above the ideal, which may be weak and misfitted. 
As usual however, it is recommended that users avoid the first few science 
windows for energy-sensitive applications (automatically removed by OSA 10.0).


JEM-X2: 

The Xe line analysis performed using the IC table shows very good gain
correction with all science windows having a Xe level 
within about 2% of the ideal, except for the very first settling points and the
last couple of SCWs in the revolution which appear to be misfitted. 
As usual however, it is recommended that users avoid the first few science 
windows for energy-sensitive applications (automatically removed by OSA 10.0).


CAO 27/02/2015