MOPEX User's Guide - IRSA

PURPOSE
MOPEX User’s Guide
The interpolated images are co-added to create one mosaic image. The pixel values of the
mosaic image are equal to the averaged interpolated pixel values, with the option to weight
them with the integration time if needed. (Generally one should not weight by uncertainties
when sources are present.) The interpolated uncertainty images are also co-added into one
uncertainty mosaic image following the standard assumption of additive variances. The
coverage maps are co-added into a single mosaic coverage map.
INPUT
Tile Max X, Y: (int) The X (Y)-size of the tile for performing the co-addition. This should be
reduced if computer memory is an issue (see §8.1).
Integration Time Weighted Coadd: Check this box to weight the coaddition by exposure
time. MOPEX searches for the header keyword indicated, the default is EXPTIME.
Mosaic Co-Adder output subdirectory: The subdirectory of that you wish to
use for the output files. Default is Coadd-mosaic.
Keep coadded Tiles: If checked, the coadded tiles will be saved, even if Delete Intermediate
Files was turned on in the Mosaic Settings module. Recommended if you are planning on
subsequently running APEX.
Sigma Weighted Coadd: Check this box to use the uncertainty-weighted coaddition option
(see below for details). Not Recomme nde d.
Create UNC Mosaic: If checked, the mosaic of uncertainties is created, propagating from the
individual input (or S/N Estimator) uncertainties.
Create Standard Deviation Mosaic: If checked, a different flavor of mosaic uncertainty
image is created. The pixel values of this image will be equal to the standard deviation of the
interpolated image pixels in the stack.
Create Outlier Mosaic: If checked, a mosaic is created of the temporal outliers detected by
the Mosaic Outlier module.
Create Dual Outlier Mosaic: If checked, a mosaic is created of the dual outliers detected by
the Mosaic Dual Outlier module.
Mosaicking (mosaic.pl) 85
Mosaic Modules