Table 1
Summary of the observational properties of the JVLA, GBT and combined data.
| Telescope | JVLA | GBT | Combined data | |||
|---|---|---|---|---|---|---|
| Parameters | NH3(1,1) | NH3(2,2) | NH3(1,1) | NH3(2,2) | NH3(1,1) | NH3(2,2) |
| Channel width (kHz) | 3.906 | 3.906 | 2.86 | 2.86 | 7.812 | 7.812 |
| Velocity resolution (km s−1) | 0.049 | 0.049 | 0.036 | 0.036 | 0.098 | 0.098 |
| RMS noise (mJy beam−1) | 3.53 | 3.63 | 170.0 | 180.0 | 3.71 | 3.82 |
| Beam major axis (″) | 3.87 | 3.77 | 31.32 | 31.32 | 4.35 | 4.30 |
| Beam minor axis (″) | 2.81 | 2.87 | 31.32 | 31.32 | 3.44 | 3.48 |
| Position angle (°) | 30.95 | 30.56 | 0.0 | 0.0 | 30.95 | 30.56 |
Notes. For the purpose of hyperfine structure fitting, velocity resolutions were smoothed to 0.098 km s−1 for the JVLA, and 0.072 km s−1 for the GBT. RMS noise was estimated from emission free areas. The combined data were smoothed by a Gaussian kernel of 2.4″, and have the same spectral resolution as the smoothed JVLA data. The quoted RMS noise of the GBT data includes the applied calibration factor.
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