; ICUT
;---------------------------------------------------------------
;! specifies a cutoff level in units of the image
;# ADVERB PLOT
;-----------------------------------------------------------------------
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;-----------------------------------------------------------------------
;---------------------------------------------------------------
ICUT      LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC
----------------------------------------------------------------
ICUT
Type: Adverb  (Real)
Use:  If some value is below ICUT in units of the image, then
      some action will not occur.
Null value: none and no default.
Procedures:
   IMFRING.......Large image delay fitting with IM2CC and OOFRING.
                 Clean components are made only from pixels > ICUT in
                 absolute value.
   IMSCAL........Large image self-cal with IM2CC and OOCAL.  Clean
                 components are made only from pixels > ICUT in absolute
                 value.
   VLACLCAL......Runs CLCAL and prints the results with LISTR.  ICUT
                 is a cutoff (unitless) for smooth functions.
Tasks:
   CLCAL.........Merges and smooths SN tables, applies them to CL tables.
                 ICUT is a cutoff (unitless) for smooth functions.
   CUBIT.........Model a galaxy's density and velocity distribution from
                 full cube.  Only pixels > ICUT in absolute value are
                 used in the fitting.
   DEFLG.........Edits data based on decorrelation over channels and time.
                 When the ratio of vector to scalar average falls below
                 ICUT (unitless) the data are flagged.
   IM2CC.........Task to convert an image to multi-facet Clean Components.
                 Clean components are made only from pixels > ICUT in
                 absolute value.
   KNTR..........Make a contour/grey plot file from an image w multiple
                 panels.  Polarization vectors are plotted only when the
                 I (unpolarized) image is > ICUT.
   MOMNT.........Calculates images of moments along x-axis (vel, freq,
                 ch).  ICUT controls which data are used in absolute
                 value > ICUT > 0 or < -ICUT > 0.
   PCNTR.........Generate plot file with contours plus polarization
                 vectors.  ICUT causes vectors to be omitted based on
                 the intensity of the contoured image.
   RMFIT.........Fits 1-dimensional polarization spectrum to Q/U cube.
                 Spectra with average total intensity less than ICUT
                 are not fit.  May be changed on a restart.
   SAD...........Finds and fits Gaussians to portions of an image.  If
                 the peak residual in an island after the first fit is
                 > ICUT, then a 2-Gaussin fit is attempted.
   SERCH.........Finds line signals in transposed data cube.  All
                 "signals" with signal/noise over ICUT (unitless) are
                 reported.
   TVSAD.........Finds and fits Gaussians to portions of an image with
                 interaction.  If the peak residual in an island after
                 the first fit is > ICUT, then a 2-Gaussin fit is
                 attempted.
   XMOM..........Fits one-dimensional moments to each row of an image.
                 ICUT controls which data are used in absolute value
                 > ICUT > 0 or < -ICUT > 0.
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