AIPS HELP file for STFACTOR in 31DEC26

As of Tue Feb 10 1:21:49 2026

HELP SECTION

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.

EXPLAIN SECTION