EVMERGE concatenates two or more event datasets. Only those lists which are common to all the inputs appear in the output.
Specify each input dataset in turn escaping with a '!'.
EVMERGE reports discrepancies between the 'headers' of the input datasets but it is YOUR RESPONSIBILITY to determine whether these will affect the integrity of the resultant dataset.
EVMERGE propagates LIVE_TIME information and sorts this into order
of increasing ON time. The user should decide if the resultant
LIVE_TIME component is sensible or not. If unsure, bin and
exposure correct the datasets before merging.