AIPS HELP file for IM2CC in 31DEC21
As of Thu Dec 2 18:13:52 2021
IM2CC: Task to convert an image to multi-facet Clean Components
INNAME Input name(name).
INCLASS Input name(class).
INSEQ 0.0 9999.0 Input name(seq. #). 0=>high
INDISK Input disk drive #. 0=>any
OUTNAME Output name(name).
OUTSEQ -1.0 9999.0 Output name(seq. #).
0 => highest unique
OUTDISK Output image disk drive #
0 => highest with room
BLC 0.0 4096.0 Bottom left corner of image
TRC 0.0 4096.0 Top right corner of image
ICUT 0.0 Include all points > ICUT in
absolute value only
FLUX Discard all points < FLUX
must be <0 to incl negative
NX 1.0 Number panels in X
NY 1.0 Number panels in Y
IMSIZE Output image size
Use: IM2CC will divide an image up into NX x NY panels and create
a sub-image for each with the same data in both the image and,
with clipping, in a CC file. This task is designed to convert a
model image, preferably not convolved and in units of Jy/pixel,
into a usable correct multi-facet model for AIPS. Images with
no components in the CC file will be deleted, so that the number
of output facets will be less than (or equal) NX * NY.
INNAME......Input name of image(name). Standard defaults.
INCLASS.....Input name of image(class). Standard defaults.
INSEQ.......Input name of image(seq. #). 0 => highest.
INDISK......Disk drive # of image. 0 => any.
OUTNAME.....Output name of image(name). Standard defaults.
The class will be controlled by IM2CC.
OUTSEQ......Output name of image(seq. #). 0 => highest unique
OUTDISK.....Disk drive # of Output image. 0 => highest with
BLC.........The bottom left-hand pixel of the input image which
becomes the bottom left corner of the subimage from
which the NX x NY panels are taken. 0 -> 1.
TRC.........The top right-hand pixel of the input image which
becomes the top right corner of the subimage from which
the panels are taken. 0 -> max allowed value.
ICUT........CC components are made only from pixel values greater in
absolute value than ICUT and
FLUX........CC components are made only from pixel values greater
than FLUX (in actual value). Thus FLUX=0 cuts off all
negatives independent of ICUT. If you want to include
values < -ICUT, you must set FLUX to a significantly
NX..........The X axis is divided into NX nearly equal panels.
NY..........The Y axis is divided in NY nearly equal panels.
Be sure to make enough to account for any W term
IMSIZE......Output image size in pixels. Value used will be the
greater of IMSIZE and the input image divided by NX and
NY. When doing gridded modeling, the grid routines use
the size of the input image to determine the size of the
grid. Very small images are not accurate in gridded
imaging making DFT required even when it is very slow.
Having an excessively large output image can overcome