Table 1
Telescopes, receivers, and backends used in this project along with observed frequency ranges.
| Telescope | Receiver | Backend | v (a) | Map coverage | Average rms(b) | ||
|---|---|---|---|---|---|---|---|
| (GHz) | G1.3 (″) | G1.6 (″) | G1.3 TmB (mK) | G1.6 TmB (mK) | |||
| IRAM 30 m | EMIR | FFTS | 85–93 | 860 × 550 | 550 × 330 | 73 | 43 |
| (E090) | 93–101 | 850 × 440 | 550 × 330 | 88 | 51 | ||
| 101–109 | 860 × 550 | 550 × 330 | 95 | 55 | |||
| 109–117 | 850 × 440 | 550 × 330 | 110 | 71 | |||
| APEX | PI230 | FFTS4G | 217–221 | 780 × 500 | 600 × 300 | 254 | 266 |
| 229–233 | 780 × 500 | 600 × 300 | |||||
| SHeFI (APEX2) | XFFTS | 265–269 | - | 650 × 340 | - | 182 | |
| FLASH+(345) | XFFTS | 289.5–293.5 | 150 × 150 | 220 × 160 | 70 | 73 | |
| 301.5–305.5 | 150 × 150 | 220 × 160 | 63 | 65 | |||
| 328–332 | - | 600 × 300 | - | 115 | |||
| 340–344 | - | 600 × 300 | - | 116 | |||
| 341.5–345.5 | 250 × 250 | 400 × 400 | 168 | 116 | |||
| 344–348 | - | 500 × 300 | - | 189 | |||
| 353.5–357.5 | - | 400 × 400 | - | 141 | |||
| 356–360 | - | 500 × 300 | - | 152 | |||
| FLASH+(460) | XFFTS | 433–437 | 150 × 150 | 220 × 160 | 209 | 511 | |
| 459–463 | - | 600 × 300 | - | 260 | |||
Notes. (a)Covered frequency range. (b) Average rms value in the reduced cubes after smoothing to a spectral resolution of 1 km s−1 and after spatial regridding to a common pixel size of 14.5″ (see Sect. 2.3). The centres of the mapped regions are given in the text.
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