Measure of pile-up in the EPIC pn timing mode using the SAS task epatplot for the bright source GX 349 + 2. Source events were extracted from a 64′′ (16 columns) wide box centred on the source position (left panel). Middle-left, middle-right, and right panels show the same region as in the left panel but after exclusion of the neighbouring 4, 6, and 8 columns from the centre of the box.