Table 8.
Spectral index measured with VLBI data.
| IC event | Source | Date | ν | Speak | uv-range | Beam | α |
|---|---|---|---|---|---|---|---|
| (GHz) | (mJy beam−1) | (Mλ) | (mas × mas,°) | ||||
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) |
| 190704A | 1WHSP J104516.2+275133 | 18+22 Jul. 2019 | 1.5 | 3.1 ± 0.3 | 2–40 | 5.6 × 4.9, 69.9 | 0.2 ± 0.1 |
| 4.4 | 3.7 ± 0.4 | ||||||
| 4.4 | 3.4 ± 0.4 | 5–105 | 2.8 × 2.1–57.8 | 0.2 ± 0.3 | |||
| 7.6 | 3.8 ± 0.4 | ||||||
| 17 Jan. 2020 | 4.7 | 2.3 ± 0.2 | 5–140 | 2.2 × 1.1, −2.0 | 0.2 ± 0.3 | ||
| 7.6 | 2.5 ± 0.3 | ||||||
| 200109A | TXS 1100+122 | 29 Feb. 2020 | 4.9 | 302 ± 30 | 4–180 | 2.2 × 1.1, −6.3 | 0.4 ± 0.3 |
| 04 Feb. 2020 | 8.4 | 378 ± 38 | |||||
| 8.4 | 374 ± 37 | 13–250 | 1.0 × 0.7, −10.4 | −0.05 ± 0.15 | |||
| 23.5 | 355 ± 36 | ||||||
| 201114A | NVSS J065844+063711 | 01+02 Dec. 2020 | 4.9 | 7.7 ± 0.8 | 4–165 | 2.0 × 1.0, 2.2 | 0.4 ± 0.3 |
| 06 Dec. 2020 | 8.4 | 9.4 ± 0.9 | |||||
| 8.4 | 9.1 ± 0.9 | 12–250 | 1.5 × 0.9, −7.43 | −0.02 ± 0.14 | |||
| 23.5 | 8.9 ± 0.9 | ||||||
Notes. Column 1: IceCube event name; Col. 2: candidate neutrino counterpart; Col. 3: date of observation; Col. 4: frequency in GHz; Col. 5: peak intensity in mJy beam−1; Col. 7: selected uv-range (in Mλ) for the spectral index computation; Col. 8: major axis (mas), minor axis (mas), and PA (in degrees, measured from north to east) of the restoring beam; Col. 9: spectral index.
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