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Table 1
Main parameters of the Nanshan telescope and survey area.
| Telescope | Nanshan 26-m antenna |
| Receiver | K-band receiver |
| Mode | On-The-Fly |
| Molecular lines | NH3 (1,1) and (2,2) |
| Rest frequency | 23.708 GHz |
| Bandwidth | 64 MHz |
| Channel number | 8192 |
| Beam size | ~2 arcmin |
| Velocity resolution | ~0.1 km s−1 |
| Main beam efficiency | 59% |
| Region | 28.2° < l < 29.7°, 2.6° < b < 4.8° |
| Survey area | 1.5° × 2.2° |
| Serpens South | 28.5° < l < 29.1°, 3.6° < b < 4.4° |
| W 40 | 28.5° < l < 29.1°, 3.2° < b < 3.6° |
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