18. Reweight visibilities

Calculate data weights based on st. dev. within each spw.

Overall results:

Mean: 33.3953
Variance: 155.141

Statwt Summary

In the tables and plots below, the weight properties are shown in the "antenna-based" scale: we first derive the optimized solutions to Wt_bl_ij=Wt_i*Wt_j for individual integrations, where Wt_bl_ij is the "baseline" weight (i.e., the MS WEIGHT column) and Wt_i/Wt_j is the "antenna-based" weight; then we compute and present the statistical properties of the latter values after slicing them along different data axes (antenna, spw, scan). Note that there is a square scale difference between the baseline weights and the antenna-based weights.

The color background present in some table cells highlights spectral windows with a statistical property signficantly deviated from its median over all of the relevant group (spw, scan, antenna):

For values above the median, shades of red are used:

3σ≤dev<4σ

;

4σ≤dev<5σ

;

5σ≤dev<6σ

;

6σ≤dev,

where σ is defined as 1.4826*MAD.

For values below the median, shades of blue are used:

3σ≤dev<4σ

;

4σ≤dev<5σ

;

5σ≤dev<6σ

;

6σ≤dev,

where σ is defined as 1.4826*MAD.


S-band |  Top of page | (Click to Jump)

S-band

Statwt Summary Plot

VLASS2.2.sb40489262.eb40524235.59494.04252769676.ms

Plot of antenna-based weight vs. antenna or spectral window (after re-weight, S-band)

Summary of after-statwt antenna-based weights (Wi) for each antenna, Band S. The antenna-based weights are derived from the visibility WEIGHT column: Wij≈WiWj.
Antenna Selection Weight Properties
Median 1st Quartile 3rd Quartile Mean S.Dev. Minimum Maximum
ea01 5.815 5.412 6.361 5.877 0.7404 0.8118 11.43
ea02 6.247 5.618 6.827 6.162 0.9235 1.744 13.52
ea03 5.253 4.832 6.056 5.405 0.8102 0.7769 11.77
ea04 5.569 5.064 6.249 5.65 0.7957 0.6495 12.54
ea06 5.782 5.324 6.328 5.821 0.7364 0.8318 9.89
ea07 5.72 5.211 6.307 5.772 0.8069 0.6924 12.38
ea08 6.037 5.536 6.68 6.106 0.8626 0.889 15.93
ea09 5.755 5.286 6.533 5.879 0.8465 0.9018 11.15
ea10 4.882 3.877 5.384 4.677 1.048 1.452 16.09
ea11 5.872 5.351 6.579 5.963 0.8677 0.8174 12.56
ea12 5.784 5.327 6.451 5.895 0.8535 0.8856 12.62
ea13 6.218 5.732 6.725 6.19 0.7918 0.8375 14.79
ea15 2.726 2.366 3.134 2.806 0.5766 1.007 17.08
ea16 6.076 5.562 6.704 6.132 0.8691 0.5254 16.9
ea17 6.373 5.84 7.118 6.456 0.8848 0.7965 10.95
ea18 4.697 4.06 5.282 4.73 0.8298 0.7822 11.58
ea19 6.168 5.677 6.908 6.268 0.8756 0.7012 14.39
ea20 6.031 5.579 6.746 6.115 0.8314 1.674 12.22
ea21 5.773 5.336 6.348 5.83 0.749 0.5124 16.14
ea22 6.016 5.459 6.717 6.076 0.8727 0.724 12.81
ea23 5.998 5.519 6.657 6.088 0.8577 1.325 14.72
ea24 5.643 5.096 6.36 5.695 0.8276 0.8827 11.08
ea25 5.847 5.23 6.537 5.899 0.9143 0.4889 12.1
ea26 5.918 5.489 6.655 6.049 0.8356 0.8816 12.77
ea27 5.715 5.258 6.547 5.858 0.8517 1.42 13.88
ea28 5.924 5.447 6.621 6.015 0.8406 1.174 16.13
Summary of after-statwt antenna-based weights (Wi) for each spectral window. The antenna-based weights are derived from the visibility WEIGHT column: Wij≈WiWj.
Spw Selection Weight Properties
Median 1st Quartile 3rd Quartile Mean S.Dev. Minimum Maximum
2 5.406 4.973 5.781 5.279 0.8099 0.4889 9.08
4 5.123 4.69 5.537 5.039 0.8444 0.6819 14.72
5 5.409 5.015 5.776 5.289 0.8112 0.7663 16.09
6 5.342 4.991 5.673 5.234 0.7594 0.9032 12.66
7 5.432 5.094 5.742 5.307 0.7573 0.9416 12.25
8 5.385 5.05 5.716 5.276 0.7566 1.041 11.72
9 5.643 5.283 5.968 5.505 0.7979 1.087 11.99
10 6.014 5.65 6.346 5.855 0.8858 1.23 15.31
11 6.357 5.984 6.685 6.172 0.9291 1.326 10.44
12 6.511 6.124 6.861 6.333 0.9607 1.304 13.66
13 6.948 6.561 7.307 6.763 1.004 1.196 15.75
14 7.127 6.716 7.504 6.939 1.031 1.151 11.34
15 6.716 6.327 7.084 6.551 0.9793 1.196 12.22
16 5.814 5.343 6.238 5.685 0.9252 1.302 17.08
17 5.604 5.093 6.068 5.476 0.9438 1.28 16.25
Summary of after-statwt antenna-based weights (Wi) for each scan. The antenna-based weights are derived from the visibility WEIGHT column: Wij≈WiWj.
Scan Selection Weight Properties
Median 1st Quartile 3rd Quartile Mean S.Dev. Minimum Maximum
4 3.946 3.412 4.538 3.972 0.7909 1.338 16.09
5 5.644 5.118 6.231 5.662 0.8147 2.561 16.9
6 6.021 5.503 6.654 6.05 0.9081 2.523 16.25
9 5.832 5.189 6.536 5.768 1.113 1.865 12.28
12 5.827 5.189 6.539 5.781 1.094 2.033 11.99
15 5.825 5.189 6.531 5.774 1.1 1.77 10.5
18 5.831 5.207 6.539 5.807 1.064 2.289 11.98
21 5.865 5.269 6.555 5.847 1.043 2.231 11.27
22 6.064 5.551 6.665 6.089 0.8758 2.837 13.52
25 5.857 5.275 6.543 5.852 1.025 2.289 10.69
28 5.857 5.284 6.547 5.86 1.019 2.325 10.96
31 5.872 5.3 6.556 5.872 1.017 2.303 11.86
34 5.869 5.308 6.558 5.876 1.017 2.359 11.75
37 5.879 5.313 6.567 5.883 1.015 2.275 10.23
38 6.063 5.551 6.666 6.084 0.8747 3.018 12.01
41 5.896 5.337 6.582 5.902 1.009 2.399 12.22
44 5.891 5.334 6.574 5.888 1.026 1.33 10.79
47 5.866 5.303 6.552 5.835 1.09 0.4889 10.38
50 5.872 5.31 6.549 5.846 1.063 0.7728 10.09
53 5.896 5.351 6.564 5.894 1.01 2.292 11.07
56 5.909 5.374 6.569 5.908 0.9993 2.317 9.34
57 6.036 5.51 6.627 6.046 0.8679 3.004 14.45
60 5.898 5.358 6.561 5.897 1.002 2.357 9.682
63 5.9 5.364 6.561 5.902 0.9926 2.259 9.642
66 5.89 5.354 6.555 5.89 1.003 2.333 10.24
69 5.885 5.348 6.556 5.886 1.005 2.343 9.909
72 5.868 5.331 6.542 5.872 0.9994 2.08 9.34
75 5.87 5.338 6.54 5.878 0.9903 2.302 11.23
76 6.025 5.493 6.619 6.036 0.8597 3.028 11.06
79 5.87 5.337 6.552 5.877 1 2.319 9.951
82 5.866 5.329 6.551 5.869 1.011 2.283 9.295
85 5.862 5.326 6.546 5.868 1.007 2.237 9.173
88 5.839 5.297 6.528 5.838 1.021 2.189 9.318
91 5.819 5.272 6.512 5.815 1.025 2.156 9.495
94 5.818 5.267 6.501 5.816 1.013 2.117 9.56
95 5.986 5.46 6.584 6.002 0.8523 2.897 11.38
98 5.818 5.272 6.506 5.813 1.029 2.062 9.25
101 5.808 5.266 6.494 5.804 1.029 2.109 9.247
104 5.794 5.249 6.478 5.787 1.031 2.045 9.715
107 5.79 5.245 6.473 5.78 1.033 2.044 9.487
110 5.753 5.194 6.44 5.728 1.059 1.886 10.12
113 5.736 5.18 6.417 5.706 1.063 1.847 10.04
114 5.923 5.39 6.509 5.937 0.8397 2.731 12.81
115 6.101 5.562 6.692 6.094 0.9078 2.664 17.08
118 5.9 5.338 6.575 5.874 1.067 2.006 10.9
121 5.898 5.328 6.575 5.866 1.073 1.974 16.13
124 5.854 5.279 6.543 5.815 1.104 1.854 9.675
127 5.812 5.21 6.505 5.746 1.144 1.597 10.08
130 5.849 5.259 6.536 5.777 1.158 1.151 10.72
133 5.906 5.346 6.574 5.869 1.085 1.906 9.473
134 6.107 5.571 6.697 6.103 0.8898 2.7 12.87
137 5.909 5.355 6.58 5.878 1.082 1.915 10.05
140 5.869 5.294 6.544 5.813 1.126 1.411 9.269
143 5.87 5.296 6.549 5.815 1.13 1.403 9.549
146 5.882 5.317 6.563 5.847 1.107 1.698 10.17
149 5.881 5.325 6.561 5.849 1.102 1.662 11.22
152 5.862 5.291 6.542 5.817 1.122 1.439 10.38
153 6.084 5.541 6.687 6.082 0.9066 2.376 15.31
156 5.831 5.235 6.522 5.768 1.153 1.342 12.04
159 5.831 5.242 6.515 5.776 1.139 1.405 9.727
162 5.839 5.256 6.517 5.789 1.122 1.606 9.634
165 5.829 5.247 6.509 5.788 1.109 1.595 9.74
168 5.801 5.209 6.474 5.745 1.127 1.613 9.635
171 5.809 5.22 6.477 5.76 1.105 1.672 9.865
172 6.042 5.492 6.654 6.051 0.8927 2.566 11.33
175 5.843 5.271 6.514 5.799 1.101 1.769 9.696
178 5.857 5.293 6.528 5.815 1.099 1.704 10.58
181 5.861 5.304 6.534 5.819 1.1 1.674 9.941
184 5.846 5.291 6.529 5.809 1.101 1.716 9.777
187 5.836 5.282 6.516 5.801 1.092 1.677 9.553
190 5.82 5.258 6.503 5.778 1.107 1.662 9.329
191 6.019 5.477 6.632 6.04 0.854 2.371 15.75
194 5.822 5.268 6.498 5.825 0.9946 1.774 9.555
197 5.803 5.252 6.485 5.812 0.9923 1.732 10.83
200 5.774 5.229 6.45 5.786 0.9865 1.742 10.16
203 5.779 5.239 6.453 5.792 0.9823 1.752 9.517
206 5.782 5.241 6.456 5.795 0.9831 1.72 11
207 5.982 5.462 6.581 6.023 0.8076 2.343 12.96
210 5.75 5.215 6.416 5.762 0.9794 1.697 9.335
213 5.747 5.209 6.419 5.764 0.9713 1.697 9.703
216 5.715 5.179 6.388 5.709 1.024 1.131 10.92
219 5.697 5.16 6.367 5.69 1.026 1.088 9.551
222 5.698 5.166 6.369 5.713 0.9747 1.615 9.191
223 5.925 5.41 6.53 5.972 0.7924 2.723 10.09
datacolumn
corrected
vis
VLASS2.2.sb40489262.eb40524235.59494.04252769676.ms
overwrite_modelcol
False
statwtmode
VLA
output_dir
 
Start time
2025-03-02 20:35:52.648
End
2025-03-03 11:42:02.071
Duration
15:06:09.423
Note, WebLog generation is not included in the time.

CASA logs for stage 18