Foreground and internal free-free absorption in particle-accelerating colliding-wind binaries - Insights from the radio emission of WR147

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Volume 701 (September 2025)

A&A, 701 (2025) A243

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Table 1

VLA measurements per spectral window.

Spw	v	S_v	σ_fit	σ
	(MHz)	(mJy)	(mJy)	(mJy)
1	1199	23.70	0.33	0.58
2	1327	24.09	0.23	0.53
3	1455	24.93	0.23	0.55
5	1711	25.81	0.24	0.57
6	1839	26.52	0.23	0.58
7	1967	27.17	0.30	0.62
8	4039	31.43	0.17	0.65
9	4167	31.43	0.18	0.65
10	4295	32.17	0.18	0.67
11	4423	32.24	0.17	0.67
13	4679	30.89	0.17	0.64
14	4807	31.88	0.17	0.66
16	5063	31.59	0.17	0.65
18	5319	32.85	0.20	0.68
19	5447	32.05	0.22	0.68
20	5575	33.50	0.27	0.72
21	5703	33.97	0.25	0.72
22	5831	32.83	0.25	0.70
24	6039	32.85	0.28	0.72
26	6295	33.41	0.31	0.74
28	6551	32.35	0.36	0.74
29	6679	33.48	0.32	0.74
31	6935	34.50	0.37	0.78
32	7063	32.40	0.37	0.74
34	7319	34.01	0.43	0.81
35	7447	34.11	0.41	0.80
36	7575	34.16	0.40	0.79
37	7703	32.40	0.38	0.75
38	7831	33.28	0.44	0.80
39	7959	33.01	0.38	0.76

Notes. The columns express the central frequency, the flux density, the statistical error from the fit σ_fit, and the final error on the flux density, for each spectral window. The first section (down to spw 7) is related to the L-band and the second to the C-band.

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