Calibration Access and Data Handbook
Next: Calling Parameters
Modifies the PSF map, by applying the effect of EPIC charge transfer
smearing. This should be called BEFORE any pile-up correction
(see 3.3.31) in order to ensure that the correct
fraction of INPUT detected events are re-distributed.
The routine consults the ModeParams files for a smearing fraction, and
takes the integrated surface brightness in each CCD column, and reduces
the brightness according to this fraction, then redistributes the smeared
fraction evenly over the column.