The SAS task epreject allows the investigator to extend possible EPIC pn data analysis down to the softest energies (120 eV for imaging and 200 eV for timing mode data, respectively). Hence its main applications will be in the study of soft X-ray sources. Based on the intended type of science, the user needs to decide if the additional data reduction steps are worthwhile to be applied for a specific EPIC pn exposure.
The task epreject performs different actions for imaging and timing mode data which are described below in § 4.3.2.1.1 and § 4.3.2.1.2.