Table 2
Column density ratios for low velocity component of the highly ionised gas observed in the optical spectra of four GRBs taken from Fox et al. (2008), and the average ratios for the 100 sightlines crossed through our data cubes.
| GRB | z |
|
|
|
|
|
||||
| GRB 050730 | 3.97 | 0.40 ± 0.25 | <0.09 | 3.7 ± 0.9 |
| GRB 050922C | 2.2 | ... | 0.21 ± 0.04 | ... |
| GRB 071031 | 2.69 | 1.6 ± 0.4 | <0.11 | 3.2 ± 0.9 |
| GRB 080310 | 2.42 | 0.55 ± 0.11 | <0.05 | 25 ± 4 |
| ISM (1 cm-3) | – | 0.63 (0.38) | 0.15 (0.125) | 60 (7.72) |
| ISM (3 cm-3) | – | 0.55 (0.25) | 0.16 (0.09) | 1650 (7.75) |
Notes. The values in bracket for NCIV/NOVI, NNV/NOVI, and NCIV/NSiIV are the median ion ratios of our sightlines through the data cubes.
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