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Table 7.
Properties of the TGSS-ADR1, WENSS, SUMSS and NVSS.
| TGSS-ADR1 | WENSS | SUMSS | NVSS | |
|---|---|---|---|---|
| Instrument | GMRT | WRST | MOST | VLA |
| Latitude | 19° 05′ 48″ N | 52° 54′ 53″ N | 53° 22′ 15″ S | 34° 04′ 43″ N |
| Central frequency | 147 MHz | 325 MHz | 843 MHz | 1.4 GHz |
| Sky coverage | Dec > −53 deg | Dec > 30 deg | Dec ≤ −30 deg | Dec > −40 deg |
| Sky area | 11.24 sr | 3.10 sr | 2.47 sr | 10.32 sr |
| Sky fraction | 0.89 | 0.25 | 0.20 | 0.82 |
| Limit flux density | 25 mJy | 15 mJy | 6/10 mJy | 2.5 mJy |
| Source density | 5.7 × 104 sr−1 | 7 × 104 sr−1 | 8.6 × 104 sr−1 | 17.2 × 104 sr−1 |
| Resolution | 25″ × 25″ | 54″ × 54″/sin(Dec) | 45″ × 45″/cos(Dec) | 45″ × 45″ |
| Number of objects | 640 017 | 229 420 | 210 412 | 1 773 484 |
Notes. More details can be found in Sect. 5.
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