Physical conditions in high-redshift GRB-DLA absorbers observed with VLT/UVES: implications for molecular hydrogen searches

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Volume 506 / No 2 (November I 2009)

A&A, 506 2 (2009) 661-675

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This article has an erratum: [https://doi.org/10.1051/0004-6361/20066780e]

Table 3:

Neutral gas, metals, dust, and molecules in the VLT/UVES sample of *Swift*-era $z_{\rm abs}>1.8$ GRB hosts (as of June 2008).
GRB	$z_{\rm abs}$	$\log N({\rm H}^0)$	[X/H]	X	${\rm [X/Fe]}^{c}$	$\log N({\rm Fe})_{\rm dust}$	$\log N({\rm H}_2)^{f}$	$\log f^{h}$	$\log N({\rm C}^0)$
050730	3.969	$22.10\pm 0.10$	$-2.18\pm 0.11$	S	$-0.06\pm 0.06^{d}$	<14.77^d	<13.8^g	<-8.0	<13.05^g
050820	2.615	$21.05\pm 0.10$	$-0.39\pm 0.10$	Zn	$+0.80\pm 0.03$	16.05	<14.1^g	<-6.7	<12.48^g
050922C	2.200	$21.55\pm 0.10$	$-1.82\pm 0.11$	S	$+0.76\pm 0.05^{e}$	<15.12^e	<14.6^g	<-6.7	<12.45^g
060607	3.075	$16.95\pm 0.03$	...^a	...^a	...^a	...^a	<13.5^g	<-3.1	<12.03^g
071031	2.692	$22.15\pm 0.05$	$-1.73\pm 0.05$	Zn	$+0.04\pm 0.02$	14.83	<14.1^g	<-7.8	<12.80^g
080310	2.427	$18.70\pm 0.10$	${\le}{-}1.91\pm 0.13^{b}$	O^b	...^a	...^a	<14.3^g	<-4.2	<12.55^g
080413A	2.435	$21.85\pm 0.15$	$-1.60\pm 0.16$	Zn	$+0.13\pm 0.07$	15.13	<15.8^g	<-5.7	<13.28^g

References to the observations: 050730: D'Elia et al. (2007); 050820: Ledoux et al. (2005); 050922C: D'Elia et al. (2005); 060607: Ledoux et al. (2006); 071031: Ledoux et al. (2007); 080310: Vreeswijk et al. (2008a); 080413A: Vreeswijk et al. (2008b).
^a The metallicity and/or depletion factor cannot be determined due to ionization effects.
^b The O I $\lambda$ 1302 line used for the fit is partially blended with strong Al II $\lambda$ 1670 absorption from an intervening system at $z_{\rm abs}=1.671$ .
^c The total Fe⁺ column density includes the contributions of energy levels above the ground state up to $^4{\rm F}_{9/2}$ whenever transition lines from these levels were detected.
^d When [X/Fe] is negative, $N({\rm Fe})_{\rm dust}$ cannot be calculated directly. In this case, we estimate a $3\sigma$ upper limit on $N({\rm Fe})_{\rm dust}$ by considering the upper bound provided by the $3\sigma$ error on [X/Fe].
^e Significant overabundance of sulphur compared to iron might be present in this system (see Sect. 3.2). The column density of Fe in dust derived from [S/Fe] (as all measurements based on S or O) should thus be considered strictly as an upper limit.
^f Sum of the contributions of the J=0 and 1 rotational levels.
^g $3\sigma$ upper limit.
^h $f\equiv 2N({\rm H}_2)/(2N({\rm H}_2)+N({\rm H}^0))$ .

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