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T_GROUP

T_GROUP

Name


T_GROUP

Purpose


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

Explanation


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


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

Inputs


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

Optional Inputs


rmax - maximum allowable distance between stars in a single group

Optional Input Keywords


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


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

Revision History


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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