The correction factor for source photons which lie outside the source box used is energy dependent. An array of corrections, one for each of the 729 trial energies, is calculated and used to produce the full energy dependent correction array stored in the datafile as:
MORE.ASTERIX.INSTRUMENT.ENCORR(1).DATA_ARRAYNB: The point spread function is only defined for a circular box. It can be used reasonable accurately with an elliptical or rectangular box, but NOT with an annulus. When files containing an annular source box are corrected, point spread corrections are turned off.