XMM-Newton Science Analysis System . ... It might be useful to allow the user to overlay more than just the target source extraction regions in order to judge contamination from other sources in the field of view. ... It might also be useful to add an aditional axis Channels describing the channels used to construct the spectrum so that this plot can be compared to the spectral plots produced by rgsspecplot . ... XMM-Newton SOC/SSC -- 2006-06-28 ...