MOPEX User's Guide - IRSA

OUTPUT
MOPEX User’s Guide
Generated Fits Files (*detmap.fits): With the default parameters, these are the detection
maps produced from the input images. A positive number indicates the threshold level
reached for that cluster.
DISCUSSION
In the Overlap pipeline, Detect is part of Bright Object Masking (set Mask Bright Object in
the Mosaic Interpolate module). The detection of bright pixels is performed on the
background-subtracted images (the output of the Med Filter module), which are in original
pixels. The output is a set of mask images, one per input image, in which pixels
corresponding to detected objects are set to a positive value. The mask images are saved in
the Detect output subdirectory unless the Delete Intermediate Files option was set in the
Overlap Settings module. If Mask Bright Object is set in the Mosaic Interpolate module then
these masks will be used in the further processing.
4.3.7 Overlap Modules: Mosaic Interpolate
Command Line Equivalent: run_mosaic_int
Default Output Directory: /Interp-overlap
De pe nds On: Initial Settings; Fiducial Image Frame; S/N Estimator (if included)
PURPOSE
This module performs a projection of input images onto a 2D plane defined by the FIF table,
and an interpolation (see §8.4) of the input pixel values to the output array of pixels of the
user-defined pixel size. It corrects for the optical distortion in the input images, using the
WCS distortion parameters in the input FITS headers. The process is intended to accept
images measuring surface brightness (MJy/sr or microJy/arcsec 2 ) and to yield images in the
same units, but it is not restricted to this. If the input FITS header does not contain an allowed
string specifying units of MJy/sr or microJy/arcsec 2 , then it will assume the input units are
counts.
INPUT
Overlap (overlap.pl) 39
Overlap Modules