multiespecget is a especget wrapper. This task has as input a set of EPIC event lists and a source and background expression in (RA,DEC) and it runs especget for each of the input files, produncing a set of spectra, responses and effective area files. In the current implementation the source and background regions should both be simple circles.
The withmultiEPICspec allows users to run epicspeccombine task to combine all the output files, spectra, responses and effective area, into a three individual files: source and background spectra and response files.
The procedure to combine the spectra files and the effective area and response matrices files it is explained in the SAS thread: “Combining the spectra of the 3 EPIC cameras”
http://xmm.esac.esa.int/sas/current/documentation/threads/epic_merging.shtml
