; STFACTOR
;---------------------------------------------------------------
;! scales star display or SDI CLEANing process
;# ADVERB IMAGING
;-----------------------------------------------------------------------
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;-----------------------------------------------------------------------
;---------------------------------------------------------------
STFACTOR  LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC
----------------------------------------------------------------
STFACTOR
Type: Adverb  (Real)
Use:  A multiplication factor.  In plot tasks, it is used to scale the
      plotting of symbols for objects from an ST (stars) table.  If
      STFACTOR = 0, no symbols are plotted.  If STFACTOR not = 0, the
      symbol sizes (in arc sec) in the file are scaled by abs(STFACTOR)
      and plotted.  If STFACTOR < 0, any labels in the file are also
      plotted.
Null value:  0 => no plot of ST contents
Plot tasks:
  CCNTR....Generate a contour plot file from an image and CC table.
  CNTR.....Generate a contour plot file or TV plot from an image.
  GREYS....Makes plot file of image grey-scale plus contours.
  KNTR.....Make a contour/grey plot file from an image w multiple
           panels.
  PCNTR....Makes plot file of image contours and polarization
           vectors.
  PROFL....Makes plot file of image profiles.
Other tasks:
  SDCLN...Does image deconvolution using the Clark CLEAN algorithm
          followed by a modified Steer-Dewdney-Ito CLEAN.  STFACTOR is
          the loop gain (fraction of each pixel's flux taken as a
          component flux) during the SDI phase of the deconvolution.  It
          must be <= the default. 0 => lower of 0.9 * (1-CUTOFF) and
          GAIN.
Verbs:
  COSTAR...Verb to plot a symbol at given position on top of a TV
           image.  Symbol is 2 * STFACTOR pixels in radius.
  TVSTAR...Verb to plot star positions on top of a TV image.  STFACTOR
           used as with plot tasks.
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