Gain Notes for Revolution 273 Re-analysis of this revolution to check that OSA9 software can handle the early revolutions with little temperature dependance and automatic switch off periods. Evidently this is the case, and no IC gain history table is needed to process this revolution correctly. JEM-X1: The Xe line analysis performed using the IC table shows excellent gain correction with all except the very first science windows having a Xe level within 1% of the ideal. As usual however, it is recommended that users avoid the first few science windows for energy-sensitive applications. This includes the science windows just after the switch on mid way through the revolution. CAO 1/06/2011