Table 6
GRB sub-sample metallicity measurements taken either from the literature or based on the Si ii lines strength.
| GRB | [M/H] | Reference |
|
|
||
| 050401 | −1.00 ± 0.40 | Watson et al. (2006) |
| 050730 | −2.17 ± 0.10 | Ledoux et al. (2009) |
| 060115 | −0.72 ± 0.37 | Prochaska et al. (2008) correlation |
| 060707 | >− 0.40 | From Si ii(1808) |
| 060714 | >− 1.30 | From Si ii(1808) |
| 060906 | −1.38 ± 0.22 | Prochaska et al. (2008) correlation |
| 060926 | −0.95 ± 0.28 | Prochaska et al. (2008) correlation |
| 061110B | −1.12 ± 0.21 | Prochaska et al. (2008) correlation |
| 070110 | >−1.40 | From Si ii(1808) |
| 070506 | −0.31 ± 0.14 | Prochaska et al. (2008) correlation |
| 070721B | −0.67 ± 0.49 | Prochaska et al. (2008) correlation |
| 070802 | −0.50 ± 0.68 | Elíasdóttir et al. (2009) |
| 071031 | −1.73 ± 0.05 | Ledoux et al. (2009) |
| 080210 | −0.93 ± 0.18 | De Cia et al. (2011) |
| 080605a | −0.42 ± 0.29 | Prochaska et al. (2008) correlation |
| 080607 | >−1.70 | Prochaska et al. (2009) |
| 080721 | >−1.10 | Starling et al. (2009) |
| 080905B | −1.10 ± 0.26 | Prochaska et al. (2008) correlation |
Notes. The Si ii (λ = 1808 Å, 1526 Å) absorption lines are used to obtain metallicity by using the optically thin approximation and the Prochaska et al. (2008) correlation. The metallicity for GRB 080607 is based on Zn element. The metallicity could be solar or even super-solar for this burst (Prochaska et al. 2009).
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