Some Useful Links
--Notes on SAX - An internal report -- "Gain problem. Description:Spectral lines are systematically blue shifted from data obtained from SAX archives by ~0.009 --Background fits for Chandra -- Over the whole S3 chip (8.3 by 8.3 arcmin) from Blank Field Observations. Energy Bands: 0.5-2.0 keV, 2.0-7.0 keV, 7.0-10 keV, 0.5-10 keV" --Cas A updated gain variation for the SISs-- Gain variations for Fe, Si and S lines as a function of time (after launch) and detector position updated Nov, 2007 by Renato Dupke
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