MOPEX User's Guide - IRSA

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&MOSAICRMASKIN BOTTOM_THRESHOLD = 3, TOP_THRESHOLD = 3, RM_THRESH = 1, MIN_COVERAGE = 500, MAX_COVERAGE = 500, REFINE_OUTLIER = 1, REFINE_OUTLIER_THRESH = 10, BOX_BOTTOM_THRESHOLD = 10, BOX_TOP_THRESHOLD = 10, BOX_MIN_COVERAGE = 1, &END In Global Parameters: RMASK_DIR = Rmask-mosaic USE_OUTLIER_FOR_RMASK = 1 USE_DUAL_OUTLIER_FOR_RMASK = 1 USE_BOX_OUTLIER_FOR_RMASK = 1 OUTPUT MOPEX User’s Guide Outlier Output FITS (*_rmask.fits): The output stack of mask images. The flagged pixels have positive bit values, with bit 0 for single frame, bit 1 for multi-frame rejection, bit 2 for dual outlier rejection, and bit 3 for box outlier rejection. DISCUSSION The module combines the results from the four different ways of rejecting outlier pixels. The outlier pixels in each interpolated image are traced back to the corresponding input image frame. Bottom Threshold and Top Threshold can be set in both the Mosaic Outlier and Mosaic RMask modules. Their values can be increased going from Mosaic Outlier to Mosaic RMask, but cannot be decreased. The Bottom Threshold and Top Threshold parameters are often set to 3 in the pipeline namelists for IRAC and MIPS-24, and 3.5 for MIPS-70 and MIPS-160. However, these numbers are not optimal for all cases. For example, a value of 3 is too low for IRAC for coverage ~50 and leads to false detections. A value of 10 is preferable. Users need to experiment with these settings and find the optimal value for any specific data. Mosaicking (mosaic.pl) 80 Mosaic Modules
MOPEX User’s Guide Refine Outlier Threshold: Multiframe Outlier detection detects outliers inside point sources, which can false in some (even many) cases. One can use the information saved in the dual outlier maps to prevent masking pixels inside what was determined by the Dual Outlier detection to be a real source. The positive pixels in the clusters in a dual outlier map (see §8.2) have been confirmed to have been detected in more than one frame. The chances are they belong to real sources. The Multiframe Outlier should be allowed to set a bit in the RMask for such a pixel if the deviation from the mean is significantly higher then would be required otherwise. To do so, set the Refine Outlier Threshold to a much larger value than the Multiframe Outlier Top Threshold. Warning: setting an outlier scheme to be included in the RMask does not guarantee that the flagged pixels will be rejected by MOPEX. Outlier rejection is a three-step process. First the desired module for outlier rejection must be run, then Mosaic RMask must be told to use the results in the mask, and, finally, MOPEX must be told to set that particular code as "fatal". For example, in order to use the results of Box Outlier Detection in the final mosaicking process, you must do the following: 1. Include the module Mosaic Box Outlier in the namelist: 2. Tell MOPEX to use the results of Mosaic Box Outlier to create the RMask by checking the Use Box Outlier for Rmask box 3. Set the RMask Fatal Mask Bit Pattern in the Initia l Setup module to include the bit corresponding to the results from Mosaic Box Outlier, bit 3. For more information on Fatal Mask Bit Patterns, see §8.11. Note: When using the Drizzle option in the Mosaic Interpolate module, several of the mosaicking steps are run twice. Firstly, a linear interpolation is carried out so MOPEX can run the outlier rejection scheme. Once the outlier rejection masks (RMasks) have been created, MOPEX returns to the Mosaic Interpolate module and re-runs the interpolation with the Drizzle algorithm, masking out any pixels flagged in the RMasks. Whe n using the Drizzle interpolation scheme in Mosaic Interpolate, do not include the Mosaic Reinterpolate Module in the processing flow. 5.6.17 Mosaic Modules: Mosaic Reinterpolate Command Line Equivalent: run_mosaic_reint Default Output Directory: /Reinterp-mosaic De pe nds On: Mosaic Interpolate; Mosaic RMask Mosaicking (mosaic.pl) 81 Mosaic 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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&END MOPEX User’s Guide if use_ps
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MOPEX User’s Guide \float Tile_Of
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MOPEX User’s Guide Input Type: De
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MOPEX User’s Guide This module co
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MOPEX User’s Guide is recorded as
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&END OUTPUT MOPEX User’s Guide Th
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INPUT Columns selection: MOPEX User
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PURPOSE MOPEX User’s Guide Fits t
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MOPEX User’s Guide given below. O
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6.5.19 APEX Modules: Aperture Photo
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MOPEX User’s Guide This module al
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Condition Builder: Some simple sele
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MOPEX User’s Guide Fatal Mask Bit
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MOPEX User’s Guide Pixel by Size:
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MOPEX User’s Guide Mosaic PRF Fil
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PRF_ResampleX_Factor = 100, PRF_Res
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7.3 Running PRF Estimate MOPEX User
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MOPEX User’s Guide 3. Outlier Rej
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PURPOSE MOPEX User’s Guide Set up
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MOPEX User’s Guide Most users wil
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DISCUSSION MOPEX User’s Guide Wit
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7.5.5 PRF Estimate Modules: Split B
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MOPEX User’s Guide Fit Seed: (int
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Chapter 8. Basic Concepts in MOPEX
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8.2 Outlier Detection MOPEX User’
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MOPEX User’s Guide Figure 8.3: An
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MOPEX User’s Guide Two ways to es
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MOPEX User’s Guide USE_DUAL_OUTLI
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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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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 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 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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