MOPEX User's Guide - IRSA

MOPEX User’s Guide
Window X, Y: (int) the X, Y size in input pixels of the window used to compute the
background value.
Outlie rs / Window: (int) the number of high outlier pixels rejected from the X*Y window
when computing the Median background. For a very crowded field, the fraction of rejected
pixels should be higher than for a less crowded field. Values of a few percent should be
acceptable for uncrowded fields. If Outliers / Window is set too high, the background will be
under-estimated.
Min Good Pixels in Window: (int) The minimum number of good (non-NaN, non-masked)
pixels needed to compute the median. This parameter should generally not need to be
adjusted. If insufficient good pixels are present, the background is recorded as "missing" and
the "missing" output pixel is replaced by interpolation of its neighbors if possible.
Min Good Neighbors Number: (int) The minimum number of good neighbor pixels needed
to perform the replacement of "missing" output pixels. This parameter should generally not
need to be adjusted.
Use SExtractor background estimation: (int) A value of 1 invokes the Sbkg background
estimate based on SExtractor. Any other value gives the default Median estimate.
SExtractor background filter size: (int) Median filter box size for the Panels when this
option is set. A value less than 2 means no filtering. If greater than the minimum number of
panels across an image, it will use the minimum.
Med Filter output subdirectory: The subdirectory of that you wish to use for
the output files. Default is Medfilter-apex.
COMMAND LINE INPUT
&DETECT_MEDFILTER
Window_X = 45,
Window_Y = 45,
N_Outliers_Per_Window = 50,
Min_Good_Pixels_In_Window = 9,
Min_GoodNeighbors_Number = 4,
Max_Bad_Pixels_OutputImage = 100,
Sbkg_Filt_Size_for_Med = 1,
Use_Sbkg_for_Med = 1,
&END
In Global Parameters:
Point Source Extraction (APEX) 125
APEX Modules