make_mask_merge creates cheese images for individual exposures using the merged source list from merge_source_list. It makes the masks in the three bands of the merged source list: soft, hard, and combined.
Warning and requirements: make_mask_merge is part of the esas package integrated into SAS, but it is limited to work within the esas data reduction scheme. This is specially true wrt the structure and names of the input files. In particular, merge_source_list assumes that other tasks from the package, mos-spectra / pn-spectra, cheese or cheese-bands, and merge_source_list have been successfully run for the lists to be used. If cheese has been run just the total band mask will be created.
