XMM-Newton Science Analysis System . ... Meta Index . ... Combines a list of spectrum files to create one combined spectrum file, and the corresponding list of response matrices and background spectrum, to create one final response matrix and background spectrum file, for a paticular RGS instrument and spectral order (if they were calculated using beta space) or for both RGS instruments and the same spectral order (if they were calculated using wavelength grid). ... Input Files . Output Files . ...