List spectral lines selected from a large library of features. The user can select by wavelength range or by feature names and/or group names. This routine has its genesis back in my days of pgplot routines for spectral feature identifion. It still seems to change a lot, so it is best to follow the examples given with the "--help" flag.

% speclines.sh --help 

Usage: speclines.sh ALL 3700.0 8000.0 Y    
arg1 - name of spectral line (can be ALL) 
arg2 - minimum allowed output wavelength  
arg3 - maximum allowed output wavelength  
arg4 - Run in debug/verbose mode (Y/N) 

The two main output files are:
  speclines.out  == a list of the selected rest wavelength in angstroms (column 1) 
                    and text name string of the feature (column 2). There is no header. 

  speclines.NumberLines == the integer number of features gathered.