Gain Notes for Revolution 1293 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: THIS REVOLUTION WAS VERY STRONGLY AFFECTED BY A SOLAR FLARE THAT DEPRESSED THE GAIN OF BOTH INSTRUMENTS TO HISTORICALLY LOW LEVELS. IT SHOULD NOT BE USED FOR ANY FLUX OR ENERGY SENSITIVE APPLICATIONS (I.E. SPECTRA), AND THEN ONLY BY EXPERTS. THE ENTIRE REVOLUTION HAS BEEN DECLARED A BTI FROM 4883.9 IJD TO 4887.9 IJD. JEM-X2 WAS SO DISRUPTED BY THE HIGH SOLAR PROTON FLUX THAT NO CALIBRATION DATA AT ALL WAS GENERATED BY THE INSTRUMENT. X-ray fluxes will be strongly affected by the very low gain since many low energy events will have been rejected by the low end cutoof in the onboard data processing. 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 else. The updated ISDC Instrument Characteristics can be downloaded from http://www.isdc.unige.ch/integral/download/osa_sw 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. JEM-X1: The Xe line analysis performed using the IC table shows sufficient gain for non energy-sensitive applications. The spread on the measured Xe line peaks is the largest ever seen with the use of IC tables due to the very weak Xe line. This science data should only be used by experts in JEM-X data analysis. 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. Calibration source 2 was similarly not used for this revolution since it too appears to have a bad anode problem. JEM-X2: The Xe line analysis performed using the IC table shows sufficient gain for non energy-sensitive applications. The spread on the measured Xe line peaks is the largest ever seen with the use of IC tables due to the extremely weak Xe line. This unit was even more strongly affected by the flare and could not even generate useable calibration data - hence a scaled version of the JEM-X1 IC table has been generated instead. This science data should only be used by experts in JEM-X data analysis who are aware of the limitations of the data. CAO 22/05/2013 Gain Notes for Revolution 1293 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 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 else. The updated ISDC Instrument Characteristics can be downloaded from http://www.isdc.unige.ch/integral/download/osa_sw 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. 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 2% of the ideal. As usual however, it is recommended that users avoid the first few science windows for energy-sensitive applications. 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. JEM-X2: Results coming soon. CAO 22/05/2013