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Table 1.

GRB afterglow sample properties.

GRB zGRB log N(H I) (cm−2) Wr (λ 1560) (Å) Wr (λ 1656) (Å) [X/H] Ion AV (mag) Refs.
F09 sample

050730 3.9693 22.10 ± 0.10 < 0.03 < 0.03 −2.18 ± 0.11 S 0.12 ± 0.02 (1, 2)
050820A 2.6147 21.05 ± 0.10 < 0.12 < 0.13 −0.39 ± 0.10 Zn 0.27 ± 0.04 (3, 4)
050922C 2.1995 21.55 ± 0.10 < 0.03 < 0.03 −1.82 ± 0.11 S 0.09 ± 0.03 (3, 5)
060210 3.9133 21.55 ± 0.15 0.78 ± 0.03 >  − 0.83 Si 0.57 ± 0.08 (6, 5)
060607A 3.0749 16.95 ± 0.03 < 0.05 < 0.07 0.08 ± 0.08 (7, 8)
061121 1.3145 0.49 ± 0.04 0.25 ± 0.04 0.55 ± 0.10 (5)
070802b 2.4511 21.50 ± 0.20 0.70 ± 0.35 1.36 ± 0.32 −0.46 ± 0.63 Zn 1.19 ± 0.15 (9, 2)
071031 2.6918 22.15 ± 0.05 < 0.03 < 0.03 −1.73 ± 0.05 Zn < 0.07 (3, 2)
080310 2.4274 18.70 ± 0.10 < 0.11 < 0.14 −1.20 ± 0.20 Si 0.19 ± 0.05 (10, 8)
080413A 2.4330 21.85 ± 0.15 < 0.03 < 0.03 −1.60 ± 0.16 Zn < 0.59 (3, 11)
080605b 1.6403 0.64 ± 0.23 0.38 ± 0.15 0.50 ± 0.13 (12)
080607a,b 3.0368 22.70 ± 0.15 2.17 ± 0.08 2.03 ± 0.04 >  − 0.20 O 2.33 ± 0.46 (13, 2)

X-shooter sample

090926A 2.1069 21.60 ± 0.07 < 0.05 < 0.06 −1.85 ± 0.10 S < 0.04 (14, 15)
100814A 1.4390 < 0.06 < 0.06 < 0.07 (15)
120119A 1.7288 22.44 ± 0.12 0.51 ± 0.05 0.77 ± 0.06 −0.96 ± 0.28 Zn 1.02 ± 0.11 (16, 15)
120327Aa 2.8148 22.01 ± 0.09 < 0.03 < 0.03 −1.17 ± 0.11 Zn < 0.03 (17)
120815Aa 2.3581 21.95 ± 0.10 (0.12 ± 0.08)c (0.21 ± 0.05)c −1.15 ± 0.12 Zn 0.19 ± 0.04 (18, 15)
121024Aa 2.3024 21.88 ± 0.10 (0.08 ± 0.05)c (0.11 ± 0.07)c −0.70 ± 0.10 Zn 0.26 ± 0.07 (19, 15)
130408A 3.7579 21.70 ± 0.10 < 0.05 < 0.06 −1.24 ± 0.12 S 0.21 ± 0.05 (6, 20)
130606A 5.9129 19.91 ± 0.02 < 0.10 < 0.10 −1.30 ± 0.08 Si < 0.07 (21, 15)
141028A 2.3334 20.55 ± 0.07 < 0.14 < 0.21 −0.73 ± 0.34 Zn 0.13 ± 0.09 (16)
141109A 2.9944 22.10 ± 0.20 < 0.11 < 0.11 −1.40 ± 0.22 Zn 0.11 ± 0.03d (22, 23)
150403A 2.0571 21.80 ± 0.20 0.34 ± 0.03 0.50 ± 0.04 −0.80 ± 0.35 S 0.12 ± 0.02d (22, 23)
151021A 2.3299 22.20 ± 0.20 < 0.17 < 0.28 −1.11 ± 0.20 Si 0.20 ± 0.03d (22, 23)
151027B 4.0647 20.50 ± 0.20 < 0.09 < 0.09 −1.62 ± 0.24 Si 0.10 ± 0.05 (22, 23, 20)
160203A 3.5185 21.75 ± 0.10 < 0.03 < 0.03 −1.26 ± 0.11 S < 0.10d (24)
161023A 2.7106 20.97 ± 0.01 < 0.03 < 0.03 −1.11 ± 0.07 Zn 0.09 ± 0.03 (25)
170202A 3.6450 21.55 ± 0.10 < 0.10 < 0.08 −1.15 ± 0.13 S < 0.12 (22, 23, 20)

180325Ab 2.2486 22.30 ± 0.14 0.58 ± 0.05 0.85 ± 0.05 >  − 0.98 Zn 1.58 ± 0.12 (26)

Notes. All GRB afterglows with spectral coverage of the C Iλλ 1560,1656 line transitions listed here are selected within a completeness limit of Wr(λ 1560)> 0.2 Å. GRB 180325A is listed separately since it is not part of the F09 or XS–GRB sample papers.

(a)

GRB afterglows where a detection of H2 in absorption has been reported in the literature.

(b)

Bursts with a prominent detection of the 2175 Å dust extinction feature.

(c)

Tentative detection of C I below the imposed detection threshold.

(d)

AV measurements from this work.

References. The H I column densities, metallicities and visual extinctions are from: (1) D’Elia et al. (2007); (2) Zafar et al. (2011a); (3) Ledoux et al. (2009); (4) Schady et al. (2012); (5) Covino et al. (2013); (6) Cucchiara et al. (2015); (7) Fynbo et al. (2009); (8) Kann et al. (2010); (9) Elíasdóttir et al. (2009); (10) De Cia et al. (2012); (11) Zafar & Watson (2013); (12) Zafar et al. (2012); (13) Prochaska et al. (2009); (14) D’Elia et al. (2010); (15) Zafar et al. (2018c); (16) Wiseman et al. (2017); (17) D’Elia et al. (2014); (18) Krühler et al. (2013); (19) Friis et al. (2015); (20) Zafar et al. (2018b); (21) Hartoog et al. (2015); (22) Selsing et al. (2018); (23) Thöne et al. (in prep.); (24) Pugliese et al. (in prep.); (25) de Ugarte Postigo et al. (2018); (26) Zafar et al. (2018a).

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