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Table 3.
H I column densities along the absorption lines with and without optical-depth corrections.
| Source | NHI, thick | NHI, thin | thick/thin |
|---|---|---|---|
| (1020 cm−2) | (1020 cm−2) | ||
| (1) | (2) | (3) | (4) |
| NVSS J005245–311503 | 14.22 | 13.73 | 1.036 |
| SUMSS J225729–410241 | 8.82 | 8.71 | 1.012 |
| SN2001ig | 9.60 | 9.46 | 1.014 |
Notes. (1) Name of background source. (2) H I column density after correction for optical depth. (3) H I column density assuming optically thin gas. (4) Ratio of H I column densities from columns (2) and (3).
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