AIPS HELP file for ICUT in 31DEC09
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.
Tasks:
PCNTR Draws polarization vectors and contours. ICUT causes
vectors to be omitted based on the intensity of the
contoured image.