MOPEX User's Guide - IRSA

MOPEX User’s Guide
This module is used to subtract the sources from the input images or the input mosaic to create a
residual image(s). This is extremely useful for testing how well the PRF fitting in APEX is
working.
INPUT
PRF Resample X(Y) Factor: (int) This is the same PRF Resample X(Y) Factor as used in
the Source Estimate module. It is the ratio of the input image pixel size to the PRF pixel size
in the x- and y-direction.
PS Image X(Y) size: (int, odd) If present and smaller than the PRF array size, the PRF array
will be cut to this size. The units are data pixels.
Flux Column Name: (char) The name of the column in the Extract Table that corresponds to
the flux of each point source.
Input RA Dec: The units of the positional input data. Choices are “Pixel Coordinates” and
“RA & Dec”.
X(Y) Column Name: (char) The name of the X and Y positional columns to be read from the
Extract Table. Options are 'RA’ and 'Dec' or 'x' and 'y'. If 'x' and 'y' are used, the Fiducial
Image Frame table must also be specified in the Initia l Setup.
Normalization Radius: (int) This is the same parameter as used in the Source Estimate
module. The PRF flux is normalized within this radius (in PRF pixels). By default, the PRF is
normalized to the whole PRF array.
Outer Radius: (int) Cuts a circular PRF image of this size in pixels. By default, the whole
image is used.
Hole Radius: (int) Cuts a hole in the PRF image of this size in pixels.
Residual output subdirectory: The name of the output subdirectory for the point source
subtracted image(s). The default is Residual-ApexQA.
COMMAND LINE INPUT
When running in Multiframe mode (i.e. on the output of apex.pl):
&POINTSOURCEIMAGE
Point Source Extraction (APEX) 162
APEX QA Modules