Table 2
Derived line parameters for the RRLs measured from Data-1 and Data-2.
| Line | Rest | Centre | FWHM | Integrated optical depth | ||
| frequency | velocity | (km s-1) | (s-1) | |||
| (MHz) | (km s-1) | Data-1 | Data-1 | Data-2 | ||
| Data-1 | SNR | SNR | Hotspot | |||
|
|
||||||
| C548α | 39.87 | – | – | – | 12 ± 2 | 14 ± 2 |
| C543α | 40.98 | − 48 ± 1 | 19 ± 2 | 12.8 ± 0.5 | 15 ± 2 | 21 ± 2 |
| C541α | 41.44 | − 48 ± 1 | 19 ± 2 | 13.3 ± 0.5 | 15 ± 2 | 23 ± 2 |
| C538α | 42.13 | − 48 ± 1 | 20 ± 3 | 14.6 ± 0.9 | 13 ± 2 | 24 ± 2 |
| C518α | 47.20 | − 48 ± 1 | 18 ± 2 | 12.8 ± 0.9 | 11 ± 2 | 20 ± 2 |
Notes.For the case of Data-1, the spectral resolution was sufficient to resolve the lines and the fitted Gaussian full width at half maximum (FWHM) is reported. For Data-2, the RRLs were not fully resolved and so the integrated optical depths were obtained over two spectral channel widths. The integrated optical depths have been calculated over the full remnant (SNR) for data sets Data-1 and Data-2, and around the region of the bright hotspot for Data-2 (see Fig. 1).
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