18. Reweight visibilitiesBack

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

Overall results:

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.

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

S-band

Statwt Summary Plot

VLASS2.2.sb40562686.eb40976780.59540.13729255787.ms

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

Summary of after-statwt antenna-based weights (W_i) for each antenna, Band S. The antenna-based weights are derived from the visibility WEIGHT column: W_ij≈W_iW_j.

Antenna Selection	Weight Properties
	Median	1st Quartile	3rd Quartile	Mean	S.Dev.	Minimum	Maximum
ea01	6.434	5.869	7.1	6.484	0.9117	0.003525	12.49
ea03	5.934	5.365	6.76	6.037	0.9421	0.003828	14.49
ea04	5.984	5.507	6.652	6.061	0.8482	0.0006323	18.57
ea05	6.212	5.675	7.054	6.346	0.957	0.02848	25.42
ea06	6.297	5.689	6.883	6.281	0.8558	0.0006641	26.58
ea07	6.183	5.672	6.77	6.223	0.884	0.0006621	14.79
ea08	6.81	6.399	7.261	6.834	0.7362	0.00911	12.67
ea09	6.178	5.54	6.97	6.237	0.9506	0.001133	16.03
ea10	0	0	0	0	N/A	N/A	N/A
ea11	6.503	5.725	7.258	6.499	1.038	0.001004	14.59
ea12	6.385	5.762	7.132	6.436	0.9881	0.001702	21.72
ea13	5.796	5.4	6.247	5.82	0.6972	0.005587	24.67
ea14	6.326	5.741	7.113	6.392	0.9816	0.0007061	26.76
ea15	4.945	4.458	5.503	4.982	0.7471	0.002053	20.26
ea16	6.48	5.926	7.182	6.536	1.019	0.0006465	18.61
ea17	7.074	6.396	8.005	7.165	1.081	0.0006606	32
ea18	5.315	4.563	6.006	5.348	0.9839	0.0006208	13.61
ea19	6.507	5.979	7.326	6.617	0.9856	0.001274	23.73
ea20	5.941	5.464	6.578	5.996	0.8224	0.01699	53.38
ea22	6.42	5.695	7.115	6.394	0.9622	0.00006547	15.51
ea23	6.354	5.771	7.057	6.413	0.9614	0.00336	30.43
ea24	6.073	5.366	6.697	6.023	0.8679	0.0009072	13.52
ea25	6.496	5.814	7.21	6.526	1.068	0.0006499	32.89
ea26	6.721	6.094	7.589	6.824	1.021	0.0009016	13.93
ea27	6.163	5.592	7.065	6.294	0.9556	0.00895	20.41
ea28	6.221	5.682	6.961	6.309	0.9206	0.01183	44.92

Summary of after-statwt antenna-based weights (W_i) for each spectral window. The antenna-based weights are derived from the visibility WEIGHT column: W_ij≈W_iW_j.

Spw Selection	Weight Properties
	Median	1st Quartile	3rd Quartile	Mean	S.Dev.	Minimum	Maximum
2	5.561	5.171	5.907	5.481	0.6933	0.0009016	32.89
3	5.073	4.514	5.696	5.15	1.046	0.002496	53.38
4	5.444	4.987	5.903	5.427	0.8061	0.00006547	12.29
5	5.59	5.212	5.943	5.519	0.6905	0.001193	19.42
6	5.674	5.344	5.998	5.627	0.6114	0.001661	21.99
7	5.708	5.395	6.016	5.654	0.6092	0.002387	14.7
8	5.662	5.315	6.016	5.629	0.6366	0.0006208	30.43
9	5.974	5.605	6.319	5.907	0.6492	0.003561	15.27
10	6.389	6.014	6.728	6.307	0.6769	0.001534	26.58
11	6.772	6.399	7.115	6.688	0.6965	0.005784	11.84
12	6.937	6.539	7.326	6.876	0.7594	0.003333	19.27
13	7.456	6.986	7.896	7.375	0.823	0.004478	15.37
14	7.645	7.177	8.088	7.568	0.829	0.003949	17.9
15	7.231	6.786	7.673	7.187	0.7764	0.005575	15.18
16	6.517	6.076	6.945	6.502	0.743	0.002874	26.76
17	6.351	5.941	6.744	6.322	0.6902	0.008801	15.91

Summary of after-statwt antenna-based weights (W_i) for each scan. The antenna-based weights are derived from the visibility WEIGHT column: W_ij≈W_iW_j.

Scan Selection	Weight Properties
	Median	1st Quartile	3rd Quartile	Mean	S.Dev.	Minimum	Maximum
4	4.75	4.257	5.301	4.792	0.7832	1.271	15.35
5	6.421	5.873	7.043	6.491	0.8826	1.092	44.92
6	6.19	5.611	6.846	6.251	0.8692	1.993	19.31
9	6.088	5.482	6.809	6.14	0.9586	1.481	14.39
12	6.095	5.488	6.818	6.153	0.9535	2.036	16.65
15	6.111	5.503	6.839	6.175	0.9605	2.053	32.89
18	6.118	5.509	6.847	6.178	0.9552	2.101	12.53
21	6.13	5.526	6.854	6.19	0.9623	1.126	27.94
24	6.149	5.531	6.868	6.202	0.9646	1.931	14.19
25	6.268	5.677	6.938	6.329	0.8981	1.648	21.42
28	6.14	5.538	6.865	6.203	0.9594	1.698	16.37
31	6.141	5.539	6.863	6.198	0.9723	1.421	20.12
34	6.149	5.54	6.879	6.202	0.9859	1.24	22.18
37	6.165	5.562	6.89	6.222	0.9757	1.037	20.98
40	6.162	5.549	6.893	6.201	1.034	0.3875	53.38
43	6.165	5.556	6.897	6.194	1.06	0.5961	13.46
44	6.299	5.72	6.956	6.36	0.8818	2.883	15.35
47	6.163	5.544	6.9	6.2	1.038	0.8685	16.62
50	6.188	5.576	6.914	6.234	1.008	1.122	13.27
53	6.179	5.557	6.917	6.207	1.053	1.565	13
56	6.15	5.523	6.901	6.177	1.073	0.5915	13.59
59	6.148	5.512	6.901	6.107	1.272	0.01164	12.16
62	6.113	5.447	6.883	5.958	1.54	0.001534	26.76
63	6.335	5.764	7	6.407	0.8977	2.341	20.26
66	6.109	5.443	6.879	5.95	1.552	0.00006547	30.43
69	6.165	5.529	6.925	6.104	1.335	0.004006	21.99
72	6.179	5.552	6.934	6.203	1.097	0.3291	11.94
75	6.234	5.606	6.978	6.261	1.064	1.398	13.08
78	6.268	5.658	6.999	6.316	1.014	1.447	10.64
81	6.285	5.676	7.02	6.351	0.979	2.458	17.94
82	6.403	5.831	7.065	6.477	0.893	1.603	28.96
85	6.294	5.69	7.026	6.367	0.9632	2.746	13.39
88	6.308	5.697	7.042	6.376	0.9787	0.7979	33.7
91	6.326	5.718	7.058	6.396	0.9733	2.711	16.59
94	6.351	5.745	7.083	6.424	0.9631	2.67	13.9
97	6.346	5.738	7.08	6.415	0.9788	2.561	14.09
98	6.446	5.866	7.115	6.517	0.8916	3.375	14.46
101	6.314	5.687	7.062	6.347	1.077	1.246	22.1
104	6.342	5.713	7.088	6.367	1.112	0.5716	11.37
107	6.376	5.756	7.115	6.434	1.013	1.601	12.56
110	6.408	5.792	7.14	6.478	0.9786	3.019	12.97
113	6.385	5.763	7.13	6.449	1.004	2.205	11.55
114	6.615	6.007	7.257	6.658	0.8944	3.264	15.66
115	6.534	5.957	7.105	6.553	0.8136	3.783	13.37
118	6.37	5.795	6.987	6.408	0.8546	3.259	11.29
121	6.37	5.794	6.996	6.411	0.8608	3.466	13.48
124	6.392	5.818	7.022	6.438	0.855	3.692	10.37
127	6.402	5.82	7.035	6.447	0.859	3.766	9.846
130	6.383	5.794	7.03	6.421	0.8898	2.492	10.09
133	6.389	5.794	7.034	6.426	0.8946	2.371	13.33
134	6.575	5.995	7.176	6.607	0.8309	4.065	11.58
137	6.404	5.805	7.054	6.451	0.877	3.741	10.38
140	6.416	5.816	7.068	6.464	0.879	3.758	10.5
143	6.422	5.817	7.072	6.468	0.8811	3.729	10.17
146	6.415	5.809	7.07	6.46	0.8862	3.661	10.68
149	6.428	5.813	7.089	6.471	0.8986	3.2	10.3
152	6.433	5.812	7.094	6.475	0.9015	3.437	10.64
153	6.596	5.99	7.213	6.627	0.8608	4.194	13.82
156	6.422	5.793	7.091	6.458	0.924	2.611	10.19
159	6.425	5.788	7.101	6.452	0.9503	2.317	10.37
162	6.412	5.774	7.087	6.446	0.9326	2.889	10.35
165	6.434	5.795	7.11	6.47	0.9264	3.008	10.37
168	6.467	5.83	7.14	6.507	0.9178	3.2	10.84
171	6.478	5.841	7.154	6.519	0.9202	3.6	10.54
172	6.589	5.955	7.226	6.619	0.886	4.067	11.39
175	6.405	5.77	7.107	6.462	0.9388	3.352	10.78
178	6.414	5.784	7.115	6.474	0.9362	3.639	10.79
181	6.422	5.784	7.127	6.481	0.9446	3.586	11.02
184	6.415	5.775	7.124	6.473	0.9514	3.493	10.78
187	6.424	5.788	7.133	6.484	0.9512	3.496	11.15
190	6.44	5.793	7.151	6.497	0.9573	3.494	10.55
191	6.542	5.9	7.219	6.593	0.9217	3.845	10.42
194	6.333	5.681	7.073	6.377	1.03	1.893	10.68
197	6.344	5.691	7.09	6.385	1.055	1.318	10.61
200	6.378	5.724	7.118	6.443	0.9881	2.959	11.01
203	6.383	5.742	7.127	6.453	0.989	2.538	10.58
206	6.41	5.766	7.145	6.482	0.9788	3.311	11.17
207	6.547	5.907	7.241	6.607	0.9417	3.34	14.05
210	6.369	5.705	7.129	6.421	1.046	2.072	11.41
213	6.346	5.675	7.113	6.369	1.12	1.316	13.23
216	6.365	5.691	7.134	6.395	1.108	0.7391	10.91
219	6.4	5.734	7.161	6.449	1.054	1.501	13.12
222	6.421	5.748	7.183	6.482	1.023	2.685	14.07
223	6.584	5.942	7.298	6.645	0.9614	2.53	17.64
224	6.188	5.581	6.843	6.237	0.8878	2.959	16.23
227	5.967	5.347	6.708	6.019	0.9966	2.04	15.59
230	5.989	5.393	6.73	6.058	0.9691	2.275	12.86
233	6.015	5.428	6.754	6.093	0.956	2.699	13.45
236	6.035	5.458	6.771	6.118	0.9492	2.623	13.92
239	6.052	5.47	6.792	6.132	0.9564	2.413	14.7
242	6.06	5.474	6.805	6.138	0.967	2.144	16.58
243	6.202	5.62	6.889	6.275	0.8918	2.898	16.16
246	6.064	5.48	6.81	6.145	0.9631	1.919	17.87
249	6.084	5.498	6.831	6.165	0.9647	2.528	15.17
252	6.104	5.519	6.848	6.185	0.966	2.051	14.03
255	6.112	5.521	6.86	6.192	0.9711	2.588	12.27
258	6.12	5.521	6.869	6.195	0.9778	2.571	13.31
261	6.12	5.518	6.871	6.194	0.9868	2.567	14.51
262	6.249	5.67	6.951	6.331	0.9175	3.219	16.35
265	6.144	5.546	6.89	6.219	0.9817	2.455	14.63
268	6.15	5.543	6.906	6.224	0.9929	2.652	11.4
271	6.095	5.466	6.866	6.127	1.101	1.024	13.22
274	6.077	5.439	6.856	6.101	1.122	1.077	14.76
277	6.156	5.533	6.913	6.219	1.014	2.33	15.63
280	6.203	5.61	6.949	6.281	0.9827	2.745	11.5
281	6.322	5.741	7.014	6.397	0.9223	2.994	18.57
284	6.215	5.622	6.958	6.294	0.9826	2.799	15.78
287	6.216	5.618	6.964	6.295	0.988	2.78	11.91
290	6.23	5.629	6.981	6.307	0.9932	2.58	12.35
293	6.25	5.65	6.997	6.33	0.9841	2.612	12.32
296	6.255	5.647	7.007	6.331	0.9928	2.572	13.99
299	6.238	5.619	6.994	6.29	1.052	1.364	11.9
300	6.402	5.813	7.092	6.477	0.9296	3.106	20.41
303	6.254	5.636	7.01	6.305	1.057	1.458	13.36
306	6.271	5.652	7.029	6.333	1.036	2.03	17.72
309	6.244	5.613	7.009	6.289	1.075	1.338	12.05
312	6.231	5.587	6.997	6.28	1.054	2.092	11.55
315	6.249	5.61	7.015	6.303	1.051	1.794	14.21
316	6.44	5.84	7.145	6.515	0.9387	3.087	16.24
319	6.289	5.66	7.053	6.352	1.039	1.708	15
322	6.315	5.689	7.079	6.386	1.019	2.505	11.8
325	6.346	5.727	7.1	6.417	1.009	2.136	18.14
328	6.374	5.765	7.117	6.45	0.9902	2.353	11.34
331	6.38	5.768	7.123	6.452	0.9894	2.627	12.76
332	6.487	5.893	7.192	6.566	0.9355	3.053	16.86
333	6.084	5.518	6.757	6.165	0.8848	2.917	17.18
336	5.945	5.372	6.693	6.035	0.9443	2.771	11.82
339	5.957	5.379	6.715	6.049	0.9521	2.692	16
342	5.944	5.35	6.709	6.026	0.9812	2.166	13.63
345	5.944	5.348	6.715	6.026	0.9919	2.315	14.33
348	5.979	5.386	6.755	6.072	0.9771	2.616	11.96
349	6.144	5.561	6.823	6.22	0.8938	3.093	16.22
352	6.025	5.429	6.798	6.115	0.9777	1.99	11.63
355	6.041	5.436	6.813	6.127	0.9816	2.797	11.84
358	6.045	5.431	6.818	6.124	0.9997	2.436	13.1
361	6.056	5.449	6.829	6.142	0.9906	2.662	13.87
364	6.071	5.461	6.841	6.154	0.9937	2.356	17.03
365	6.195	5.594	6.891	6.268	0.9241	2.982	15.9
368	6.112	5.497	6.874	6.183	1.006	1.864	11.05
371	6.121	5.498	6.89	6.191	1.01	1.823	14.3
374	6.092	5.459	6.866	6.129	1.101	0.8155	12.31
377	6.076	5.429	6.855	6.1	1.136	0.5879	11.26
380	6.086	5.433	6.868	6.131	1.071	1.523	10.58
383	6.123	5.479	6.903	6.184	1.039	1.43	12.06
384	6.275	5.656	6.965	6.34	0.9226	2.946	15.5
387	6.178	5.543	6.954	6.25	1.015	2.263	11.46
390	6.181	5.547	6.955	6.255	1.013	2.482	14.93
393	6.181	5.543	6.957	6.251	1.022	2.297	11.01
396	6.198	5.553	6.98	6.266	1.032	1.982	11.24
399	6.204	5.566	6.985	6.26	1.069	1.131	15.11
402	6.228	5.593	7	6.286	1.053	1.378	12.06
403	6.326	5.734	7.049	6.416	0.9353	3.198	17.59
406	6.259	5.632	7.029	6.332	1.021	2.538	13.26
409	6.266	5.634	7.034	6.333	1.026	2.214	12.37
412	6.27	5.635	7.041	6.342	1.022	1.99	14.79
415	6.276	5.636	7.041	6.343	1.023	2.652	13.52
418	6.287	5.646	7.057	6.355	1.021	2.549	12.3
421	6.297	5.661	7.062	6.365	1.021	2.602	13.76
422	6.365	5.75	7.084	6.441	0.9461	3.463	14.29
425	6.302	5.66	7.07	6.371	1.018	2.835	12.38
428	6.308	5.666	7.075	6.378	1.016	2.833	12.72
431	6.323	5.679	7.087	6.391	1.017	3.004	11.87
434	6.331	5.691	7.095	6.401	1.016	2.863	14.03
437	6.342	5.704	7.107	6.414	1.015	2.911	12.2
440	6.346	5.704	7.115	6.419	1.022	2.889	11.38
441	6.408	5.793	7.134	6.493	0.9531	3.58	13.54
442	4.447	3.843	5.135	4.487	0.9447	0.955	21.72