MOPEX User's Guide - IRSA

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MOPEX User’s Guide Not all of the output files above will be produced by Mosaic Combine. Many will only be produced if requested in either APEX Settings or Mosaic CoAdder. This module is only required in the APEX flow when running APEX Multiframe or APEX User List Multiframe. If a mosaic has previously been created using Mosaic then this module can be dropped from the APEX flow, and the mosaicking results used as input instead. Note that the APEX pipeline does not carry out any outlier rejection when combining the input images into a mosaic. In order to use an outlier rejection scheme, you must run Mosaic and use the output from Mosaic as input into APEX. See §6.3.1 for instructions on how to do this. 6.5.14 APEX Modules: Extract MedFilter Command Line Equivalent: run_extract_medfilter Default Output Directory: ; /Medfilter-apex De pe nds On: Detect or input user list Relevant Pipelines: All PURPOSE This module is an instance of the same MedFilter that is run during outlier rejection in the Mosaic pipeline, and earlier in the APEX pipeline (before source detection). In this case, it performs the background subtraction of the image(s) that will be used for source extraction. In Multiframe pipe lines, those are the individual input images, and in Single Frame pipelines it is the mosaic image. There are two options: the Median case (default) and the Sbkg case, which uses a background estimate like that of SExtractor. INPUT 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 pixe ls 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. If insufficient good pixels are present, the background Point Source Extraction (APEX) 140 APEX Modules
MOPEX User’s Guide 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. 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. 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. COMMAND LINE INPUT &EXTRACT_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 Max_Bad_Pixels_OutputImage: (int; command line only) The maximum number of allowed bad (NaN) pixels in the output image. OUTPUT Generated FITS (*_Image_minback.fits in Multiframe modes or mosaic_minus_median_detect.fits in Single Frame modes): The output is the background subtracted mosaic image (or tiles). In Single Frame modes, the files are written in the main output directory, but in Multiframe pipelines, the tiles are stored in the Coadd-apex/ subdirectory. DISCUSSION Point Source Extraction (APEX) 141 APEX 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 Important: Usi
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MOPEX User’s Guide Figure 8.12: T
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8.3.2 Thresholding MOPEX User’s G
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T cl = P min − T min SegLevel MOP
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Centroid _ X = ∑ i∈cluster X(i)
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MOPEX User’s Guide where IPi is t
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MOPEX User’s Guide Figure 8.18: T
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8.4.5 Cubic: Bicubic Interpolation
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z n = ∑ r(r≠n ) Onr(I n − Ir
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MOPEX User’s Guide the parameter
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MOPEX User’s Guide Figure 8.22: P
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MOPEX User’s Guide that resembles
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∑ AP = a i ⋅ I i MOPEX User’s
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MOPEX User’s Guide In particular
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8.9.3 Aperture Uncertainties MOPEX
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MOPEX User’s Guide e.g. if you wi
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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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