emosaic_prep is a task to separate processed calibrated event files (as output from epproc and emproc) for EPIC PN and MOS observations in EPIC Mosaic mode into several pseudo-exposures corresponding to the different pointings of the mosaic observation.
The corresponding calibrated event lists are separated per pointing using the information contained in the ODF Attitude History File. Directories for each pointing are created directly above the working directory with fix names <my-working-dir>/prep_mosaic_001, <my-working-dir>/prep_mosaic_002, .... In each of the directories a reduced calibrated event list will be located, containing only the events corresponding to that pointing. The nomenclature of those files is RRRR_OOOOOOOOOOO_E<inst>_EEEE_ImagingEvts_P<pos>.ds with RRRR = revolution, OOO... for observation ID, <inst> more EPN, EMOS1 or EMOS2 and <pos> for position of the pointing in the sequence. The calibrated event files get pseudo-exposures ID, so that the processing software (see emosaicproc) can handle them as separated exposures. By default they start by 11 counting upwards (controlled by parameter pseudoexpid..
GTI cuts can be applied to any of the original full event files.
