XMM-Newton Science Analysis System: User Guide

5.16 RGS small-window mode

From SAS v11.0, RGS Small Window mode exposures are processed automatically. In this , designed to reduce pile-up in bright sources, only central parts of the CCD detectors are read out. As background spectra are normally calculated from data at the edges of the detectors, none are available in this mode.

European Space Agency - XMM-Newton Science Operations Centre