Gain Notes for Revolution 911 JEM-X2: A quite normal revolution with fine gain fitting. All the data from this revolution should be useable. The Xe line analysis confirms the good gain calibration for this revolution with all except the very first Science Windows having a Xe line position with about 2% of the ideal value. As always, however, it is suggested that users avoid the first few science windows in each revolution since this is where the instrument warms up and gain variations across the plate settle down. CAO 28/04/2010 Gain Notes for Revolution 911 JEM-X1: First revolution of the SPI annealing for which JEM-X1 was switched on for the first time in almost a month. There is a huge settling period during which the Xe line appears far too low. Generally the gain during this revolution was very high (upto 30 chans per keV) and this has brought out the non-linear temperature effect that has further lowered the Xe line position. This first part of the revolution has been declared a Bad Time Interval and will be ignored by OSA software. The BTI is IJD = 3741.3 - 3741.8 To get optimal results with this revolution it is necessary to use the IC gain history table that has been created offline at DNSC, instead of the gain history table created automatically by OSA. If you have the newest package of IC files from ISDC and these are correctly installed, OSA will find the IC gain history table automatically and you don't need to do anything. However, if you don't have the IC gain table package from ISDC you can download the table from the gain history archive by anonymous ftp through the link provided. Download the table to some suitable subdirectory for your analysis, then set the hidden OSA parameter gainHist: gainHist="/". These files are used instead of the automatically generated gain history tables wherever there has been an unusual or non-linear behaviour of the detector gain. The Xe line analysis using the IC table confirms the good gain correction if this table is used, with gain calibration within about 2-3% for all science windows except the first ones. As always it is recommended that the first few science windows in the revolution are avoided for all applications requiring accurate energy determination. Calibration source number 4 (purple/orange) is no longer used for calibration purposes since an anode strip directly under the source has broken and no useable signal comes from this area of the detector any longer. CAO 21/05/2010