Table 1
Continuum properties for all the SNRs in our sample derived from the 74 MHz VLSSr images.
| Galactic | Alternative | Morphological | Size | VLSSr flux | Σ74 | VLSSr rms | Speak |
|---|---|---|---|---|---|---|---|
| name | name | class | θmax[′] ×θmin[′] | density[Jy] | [W m−2 Hz−1 sr−1] | [Jy beam−1] | [Jy beam−1] |
| G4.5+6.8 | Kepler | Shell | 5 × 5 | 111 ± 17 | 6.7 × 10−19 | 0.23 | 24.4 |
| G18.8+0.3 | Kes 67 | Shell | 17 × 11 | 76.2 ± 13.8 | 6.1 × 10−20 | 0.14 | 1.9 |
| G21.5−0.9 | – | Plerion | 3.2 × 3.2 | 6.4 ± 1.1 | 9.4 × 10−20 | 0.15 | 4.1 |
| G21.8−0.6 | Kes 69 | Shell | 22 × 10 | 169 ± 31 | 1.2 × 10−19 | 0.18 | 4.5 |
| G23.3−0.3 | W41 | Shell | 18 × 7 | 88 ± 17 | 1.1 × 10−19 | 0.14 | 2.3 |
| G27.4+0.0 | Kes 73 | Shell | 6 × 5 | 13.8 ± 2.5 | 6.9 × 10−20 | 0.14 | 2.8 |
| G28.6−0.1 | – | Shell | 9.5 × 7.0 | 26.9 ± 4.7 | 6.4 × 10−20 | 0.15 | 2.4 |
| G29.7−0.3 | Kes 75 | Composite | 4.5 × 3.5 | 48.5 ± 7.9 | 4.6 × 10−19 | 0.22 | 14.0 |
| G31.9+0.0 | 3C 391 | MM | 6.5 × 5.5 | 31.5 ± 5.4 | 1.2 × 10−19 | 0.20 | 4.9 |
| G39.2−0.3 | 3C 396 | Composite | 7.5 × 7.5 | 44.8 ± 8.8 | 1.2 × 10−19 | 0.16 | 4.0 |
| G41.1−0.3 | 3C 397 | MM | 5.5 × 4.0 | 68.9 ± 10.6 | 4.7 × 10−19 | 0.16 | 12.7 |
| G43.3−0.2 | W49B | MM | 5.5 × 5.5 | 64.0 ± 10.1 | 3.2 × 10−19 | 0.13 | 11.6 |
| G120.1+1.4 | Tycho | Shell | 9 × 9 | 255.0 ± 38.8 | 4.7 × 10−19 | 0.15 | 14.5 |
| G130.7+3.1 | 3C 58 | Plerion | 8.5 × 4.5 | 34.6 ± 5.3 | 1.4 × 10−19 | 0.08 | 3.7 |
Notes. Columns 1 and 2 list the Galactic-coordinate names and the alias of all the SNRs included in our sample set, respectively. The radio morphology class of the source is noted in Col. 3. If the SNR presents a mixed X-ray and radio morphology, it is indicated by the abbreviation MM. The size of each source, measured at 74 MHz from the VLSSr images, is reported in Col. 4. The total flux density and the surface brightness at 74 MHz are summarised in Cols. 5 and 6, respectively. Columns 7 and 8 report the rms noise level (1σ) and the peak of the 74 MHz emission calculated in the individual VLSSr maps.
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