MOPEX User's Guide - IRSA

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MOPEX User’s Guide Inclusion of the neighboring pixels allows for outlier detection, even in the case of coverage of two, where the simple temporal detection is completely powerless. Clearly, a single pixel radhit on a relatively constant background can be easily identified as outlier, even with the smallest box size of 3. However, even radhit in the shape of wide and long streaks can be successfully detected by this method owing to the Box Median Bias. Suppose, the box size is 3, so the stack consists of 18 pixels, and the size of the radhit is at least 3x3 pixels. Out of the 18 pixels 9 background pixels have values relatively close to each other. The 9 radhit pixels will in general have greater scatter, then the 9 background pixels. Because of the bias, the median will be equal to the highest value of the background pixels. The difference between the highest and the lowest values of the background pixels are expected to be smaller, than the difference between the highest value of the background pixel and the lowest value of the radhit pixels. Consequently, the biased median deviation will be equal to the difference between the highest and lowest values of the background pixels. Figure 8.11: The 18 pixel values shown here are from two images and the box size of 3. The 9 lower pixel values are the background and the 9 higher pixel values are from a radhit. The problem with temporal outlier rejection is that it sometimes rejects valid pixels in the center of bright sources. It is especially acute for the undersampled data. Interpolation of such data results in significant errors and some interpolated pixels have values higher than the uncertainties and the scatter in the stack. Including the neighboring pixels increases the estimate of the scatter and prevents identifying such pixels as outliers. Basic Concepts in MOPEX 192 Out lier Det ect ion
MOPEX User’s Guide Figure 8.12: The pixels inside the re d rectangle are include d in the box stack. The re d rectangle is centered around the solid red pixel, which is the mosaic pixel for which the estimation is performed. The solid red pixel is part of the main stack. In the figure BOX X = 5 and BOX Y = 3. Figure 8.13: Interpolated images (red) are stacked up and shown here in the side view. The underlying FIF grid is shown in black. The solid red pixels comprise the main stack and the solid red and pink pixels comprise the box stack. In this figure BOX X = 3 and BOX Y is not shown. Basic Concepts in MOPEX 193 Out lier Det ect ion
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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 Mosaic FIF Tab
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MOPEX User’s Guide Tile BCD file
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MOPEX User’s Guide Window X, Y: (
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MOPEX User’s Guide neighboring pi
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⎛ ⎜ ⎜ P( j) = ⎜ 1+ ⎜ ⎜
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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 pixels set to
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MOPEX User’s Guide This module co
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Page 151 and 152: INPUT Columns selection: MOPEX User
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Page 157 and 158: 6.5.19 APEX Modules: Aperture Photo
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Page 185 and 186: Chapter 8. Basic Concepts in MOPEX
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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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