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Table 1.

Sample properties of the H2- and/or C I-bearing XS-GRB absorbers.

GRB zGRB logN(H I) logN(H2) logfH2 logN(C I) (a) logN(CO) (a) [X/H] AV
(cm−2) (cm−2) (cm−2) (cm−2) (mag)
120119A 1.7288 22.44 ± 0.12 ≳14.9 < 15.7 −0.96 ± 0.28 1.02 ± 0.11
120327A 2.8143 22.07 ± 0.01 17.39 ± 0.13 −4.38 ± 0.14 < 14.3 < 15.3 −1.49 ± 0.03 < 0.03
120815A 2.3582 22.09 ± 0.01 20.42 ± 0.08 −1.39 ± 0.09 14.24 ± 0.14 < 15.0 −1.45 ± 0.03 0.19 ± 0.04
120909A 3.9290 21.82 ± 0.02 17.25 ± 0.23 −4.27 ± 0.25 < 14.0 < 14.2 −1.06 ± 0.12 0.16 ± 0.04
121024A 2.3005 21.78 ± 0.02 19.90 ± 0.17 −1.59 ± 0.18 13.91 ± 0.08 < 14.4 −0.76 ± 0.06 0.26 ± 0.07
141109A 2.9940 22.18 ± 0.02 18.02 ± 0.12 −3.86 ± 0.14 < 14.7 < 15.9 −1.63 ± 0.06 0.11 ± 0.03
150403A 2.0571 21.73 ± 0.02 19.90 ± 0.14 −1.54 ± 0.15 ≳14.3 < 14.9 −1.04 ± 0.04 < 0.13
180325A 2.2496 22.30 ± 0.14 ≳14.5 < 15.9 >  − 0.96 1.58 ± 0.12
181020A 2.9379 22.20 ± 0.05 20.40 ± 0.04 −1.51 ± 0.06 13.98 ± 0.05 < 13.3 −1.57 ± 0.06 0.27 ± 0.02
190114A 3.3764 22.15 ± 0.05 19.44 ± 0.04 −2.40 ± 0.07 13.54 ± 0.08 < 13.3 −1.23 ± 0.07 0.36 ± 0.02
080607 3.0363 22.70 ± 0.15 21.20 ± 0.20 −1.23 ± 0.24 > 15.1 (b) 16.5 ± 0.3 >  − 0.2 (c) 2.58 ± 0.45

Notes. References for the measurements of the neutral and molecular gas-phase abundances and rest-frame AV can be found in the appendix.

(a)

The measured 2σ upper or lower limits are provided for each GRB.

(b)

The lower limit on the total C I column density for GRB 080607 is inferred from the rest-frame equivalent width of C I (see Sect. 3.4).

(c)

The lower limit on the metallicity for GRB 080607 is derived from the [O/H] abundance following Prochaska et al. (2009).

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