MOPEX User's Guide - IRSA

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INPUT 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. SExtractor background filter size: (int) Median filter box size for the Panels when the Use SExtractor background estimation option is turned on. A value less than 2 means no filtering. If greater than the minimum number of panels across an image, it will use the minimum. Use SExtractor background estimation: Checking this box invokes the Sbkg background estimate based on SExtractor. Leaving it unchecked causes MOPEX to use the default Median estimate. Med Filter output subdirectory: The subdirectory of that you wish to use for the output files. Default is Medfilter-PRF-Estimate. COMMAND LINE INPUT &MEDFILTER Window_X = 45, Window_Y = 45, N_Outliers_Per_Window = 500, Use_Sbkg_for_Med = 1, Sbkg_Filt_Size_for_Med = 3, &END In Global Parameters: MEDFILTER_DIR = Medfilter-PRF-Estimate OUTPUTS Generated Fits Files (*_minback.fits): The background subtracted, individual images. A list of the generated images is also written out. PRF Estimate 172 PRF Estimate Modules
DISCUSSION MOPEX User’s Guide With the default Median option, the program computes a background value using the median of a running rectangular window of Window X by Window Y pixels, after omitting the Outliers / Window highest pixels. This is done for each pixel so can be very slow. If Use SExtractor background estimation is set, the module switches to the Sbkg background estimation based on that of SExtractor (Bertin and Arnouts, AASupp 117, 393, 1996). The image is divided into Panels with size given by Window X, Y. In each Panel, iterative clipping is used to find a single estimate of the background in the Panel. You can optionally median filter the Panel background values, e.g. to avoid ones where bright objects skewed the background estimate. The median filter size is given by SExtractor background filter size. It then interpolates the Panel values to find the background at each pixel. This is much faster than calculating the median of a big window at each pixel. Both background estimates generally give reasonable results but if the data volume is large, the Sbkg option is strongly recommended, as it is much faster. It also does not require an estimate of Outliers / Window. 7.5.4 PRF Estimate Modules: Crop Stack Command Line Equivalent: run_crop_stack Default Output Directory: /Crop_Stack De pe nds On: MedFilter PURPOSE This module cuts out postage stamp images from the input images around each point source from the input point source list given in Point Source List. If a single image name is specified (Input File), the postage stamps are cut from that image. If a list of images is specified (Image Stack File), then the postage stamp images are cut from each image in the list. INPUT PostStamp X(Y) size: (int) The X and Y size, in pixels, of the postage stamp to cut out around each point source. PRF Estimate 173 PRF Estimate Modules
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MOPEX User’s Guide MOsaicking and
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MOPEX User’s Guide Chapter 4. Ove
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MOPEX User’s Guide 7.4 PRF Estima
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Chapter 1. Introduction MOPEX User
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MOPEX User’s Guide • If you are
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for Linux and Solaris systems, and:
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Chapter 2. Overview of MOPEX MOPEX
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For instructions on how to run MOPE
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2.3.1 Additional Functionality MOPE
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MOPEX User’s Guide mosaic_mask.pl
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MOPEX User’s Guide Choosing the r
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MOPEX User’s Guide photometry), o
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Chapter 3. MOPEX Input MOPEX User
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3.2 MOPEX Input List Files MOPEX Us
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Chapter 4. Overlap (overlap.pl) MOP
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MOPEX User’s Guide 3. Background
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MOPEX User’s Guide Output Directo
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ncpu_multiprocess = 1 default = 1 I
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4.3.3 Overlap Modules: S/N Estimato
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σ = σ 2 readnoise g 2 + σ 2 conf
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MOPEX User’s Guide Generated Head
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OUTPUT MOPEX User’s Guide Generat
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OUTPUT MOPEX User’s Guide Generat
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MOPEX User’s Guide When choosing
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MOPEX User’s Guide offsets and th
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Chapter 5. Mosaicking (mosaic.pl) M
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MOPEX User’s Guide They do not ne
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MOPEX User’s Guide interpolated u
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MOPEX User’s Guide more informati
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MOPEX User’s Guide Pixel by Size:
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OUTPUT None DISCUSSION MOPEX User
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MOPEX User’s Guide This module al
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MOPEX User’s Guide negative numbe
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DISCUSSION MOPEX User’s Guide For
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MOPEX User’s Guide then interpola
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MOPEX User’s Guide This module pe
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DISCUSSION MOPEX User’s Guide Mos
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PURPOSE MOPEX User’s Guide This m
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DISCUSSION No further information.
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MOPEX User’s Guide processed in o
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MOPEX User’s Guide Min Pix Number
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MOPEX User’s Guide Box Median Bia
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MOPEX User’s Guide If coverage >=
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MOPEX User’s Guide Refine Outlier
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MOPEX User’s Guide Reinterpolatio
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PURPOSE MOPEX User’s Guide The in
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MOPEX User’s Guide The tile speci
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MOPEX User’s Guide Standard Devia
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Mosaic Coverage File (mosaic_cov.fi
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There are no user-defined input par
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COMMAND LINE INPUT See INPUT. OUTPU
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MOPEX User’s Guide limitations di
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6.3 Running APEX MOPEX User’s Gui
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MOPEX User’s Guide Point Source D
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Figure 6.1: Overview of the main pr
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Relevant Pipelines: All PURPOSE INP
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NICE = 1 save_namelist = 1 MOPEX Us
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MOPEX User’s Guide Mosaic PRF Fil
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create_unc_mosaic = 1 use_std_to_de
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MOPEX User’s Guide Use Refined Po
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MOPEX User’s Guide Here FLUXCONV
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MOPEX User’s Guide This module cr
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MOPEX User’s Guide year) and with
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MOPEX User’s Guide In order to ru
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MOPEX User’s Guide from the GUI,
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9.4.2.1 Input Files and Output Dire
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MOPEX User’s Guide Table 9.1: Lis
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9.7.2 APEX User List Multiframe (ap
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9.7.4 Single-frame mode (apex_1fram
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MOPEX User’s Guide Table 9.6: Lis
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Appendix A. Full List of MOPEX Scri
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A.1.3 Under Construction Running MO
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Appendix B. Full List of Modules in
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Mosaic Interpolate run_mosaic_int P
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Running MOPEX on the Command Line a
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B.5 PRF Estimate Modules Running MO
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Instrument PRF Samp c Norm Radius (
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Some Tips for MOPEX with Spitzer Da
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