Name

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T_GROUP

Purpose

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

Explanation

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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

Calling Sequence

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

Inputs

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

Optional Inputs

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rmax - maximum allowable distance between stars in a single group

Optional Input Keywords

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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,

Procedures

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

Revision History

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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