Split a list of image names into files identified by EXPTIME. Note that this script does no pre-job file cleanup. If you have previously run this script and created a lot of LIST.* files, then a subsequent run will append the same file names tothe existing output files. Th user is responsible for this clean up.

% list_split_exptime --help 
Usage: list_split_exptime list.1 LisT_E Y  
arg1 - Name of file with list of FITS images (can be full path)
arg2 - prefix string for output list(s)
arg3 - run verbose/debug mod (Y/N)


Examples: 
% list_split_exptime ../list.OPEN ListExp N 

*** Please wait while divide the list by EXPTIME. **** 
Line count results: 
    8 ListExp.0sec
    7 ListExp.10sec
   12 ListExp.15sec
   23 ListExp.1sec
    7 ListExp.20sec
  256 ListExp.5sec
  313 total
% ls
ListExp.0sec  ListExp.10sec  ListExp.15sec  ListExp.1sec  ListExp.20sec  ListExp.5sec