T_GROUP

       Driver procedure (for GROUP) to place stars in non-overlapping groups.

       This procedure is part of the DAOPHOT sequence that places star
       positions with non-overlapping PSFs into distinct groups
       Input and output are to FITS ASCII tables

       T_GROUP, fitsfile, [ rmax, XPAR = , YPAR = , NEWTABLE = ]

       FITSFILE -  Name of disk FITS ASCII table containing the X,Y positions
               in FITS (FORTRAN) convention (first pixel is 1,1)

       rmax - maximum allowable distance between stars in a single group

       XPAR, YPAR - scalar strings giving the field name in the output table
               containing the X and Y coordinates.   If not supplied,
               then the fields 'X' and 'Y' are read.
       NEWTABLE - scalar giving name of output disk FITS ASCII table.   If not
               supplied,

       FTADDCOL, FTGET(), FTINFO, FTPUT, GROUP, READFITS(), SXADDHIST,
       SXADDHIST, WRITEFITS

       Written, W. Landsman        STX Co.      May, 1996
       Converted to IDL V5.0   W. Landsman   September 1997
       Updated for new FTINFO call    W. Landsman    May 2000

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