\begin{table}%t3 \caption{\label{LinesTable}Line Identifications in the GRB 021004 OA spectra.} %\centering \par \begin{tabular}{lccc} \hline\hline $\lambda_{\rm vacuum}$(observed) (\rm \AA) & Line ID & $EW$ (\rm \AA)\tablefootmark{a} & $z$ \\ \hline 4008 & H I Ly$\alpha$ 1215.670 & & 2.2967\\ 4015 & Si III 1206.499 & & 2.3275\\ 4016 & Si III 1206.499 & & 2.3289\\ 4028 & C IV 1548.203 & & 1.6024\\ 4038 & H I Ly$\alpha$ 1215.670 & & 2.3216\\ 4041 & H I Ly$\alpha$ 1215.670 & & 2.3243\\ 4045 & H I Ly$\alpha$ 1215.670 & & 2.3275\\ 4047 & H I Ly$\alpha$ 1215.670 & & 2.3289\\ 4049\tablefootmark{b} & H I Ly$\alpha$ 1215.670 & & 2.3304\\ 4084.0 & N V 1238.821 & 0.46 $\pm$ 0.16 & 2.2967\\ 4097.2 & N V 1242.804 & 0.35 $\pm$ 0.15 & 2.2967\\ 4123.9 & N V 1238.821 & 0.90 $\pm$ 0.14 & 2.3289\\ 4137.2 & N V 1242.804 & 0.66 $\pm$ 0.12 & 2.3289\\ 4158.5 & Si II 1260.422 & 0.25 $\pm$ 0.10 & 2.2993\\ 4195.8 & Si II 1260.422 & 0.71 $\pm$ 0.19 & 2.3289\\ 4210.2 & Si II 1264.738 & 0.51 $\pm$ 0.16 & 2.3289\\ 4347.4 & Al II 1670.787 & 0.49 $\pm$ 0.17 & 1.6020\\ 4399.6 & C II 1334.530 & 0.38 $\pm$ 0.15 & 2.2968\\ 4403.0 & C II 1334.530 & 0.79 $\pm$ 0.14 & 2.2994\\ 4639.7 & Si IV 1393.754 & 1.39 $\pm$ 0.83 & 2.3289\\ 4669.7 & Si IV 1402.770 & 1.29 $\pm$ 0.46 & 2.3289\\ 5104.0 & C IV 1548.203 & 1.77 $\pm$ 0.12 & 2.2967\\ 5107.8 & C IV 1548.203 & 0.16 $\pm$ 0.03 & 2.2992\\ 5108.5 & C IV 1548.203 & 0.84 $\pm$ 0.10 & 2.2998\\ 5112.5 & C IV 1550.777 & 1.15 $\pm$ 0.09 & 2.2967\\ 5116.2 & C IV 1550.777 & 0.06 $\pm$ 0.04 & 2.2992\\ 5117.0 & C IV 1550.777 & 0.67 $\pm$ 0.08 & 2.2998\\ 5138.3 & C IV 1548.203 & & 2.3189\\ 5140.0 & C IV 1548.203 & & 2.3200\\ 5143.1 & C IV 1548.203 & & 2.3220\\ 5146.7 & C IV 1550.777 & & 2.3188\\ 5146.7 & C IV 1548.203 & & 2.3243\\ 5148.5 & C IV 1550.777 & & 2.3200\\ 5148.5 & C IV 1548.203 & & 2.3255\\ 5151.7 & C IV 1550.777 & & 2.3220\\ 5152.9 & C IV 1548.203 & & 2.3275+2.3289 \\ 5155.2 & C IV 1550.777 & & 2.3243\\ 5157.6 & C IV 1550.777 & & 2.3255\\ 5161.5 & C IV 1550.777 & & 2.3275+2.3289 \\ 5235.4 & Si I 1572.718 & 0.80 $\pm$ 0.10 & 2.3289\\ 5559.5 & Al II 1670.787 & 0.23 $\pm$ 0.07 & 2.3275\\ 5561.9 & Al II 1670.787 & 1.73 $\pm$ 0.12 & 2.3289\\ 5578.0 & Fe II 2344.214 & 1.01 $\pm$ 0.15 & 1.3796 \\ 5651.2 & Fe II 2374.461 & 0.52 $\pm$ 0.06 & 1.3800 \\ 5652.4 & Fe II 2374.461 & 0.16 $\pm$ 0.05 & 1.3805 \\ 5652.9 & Fe II 2374.461 & 0.13 $\pm$ 0.02 & 1.3807 \\ 5671.2 & Fe II 2382.765 & 0.86 $\pm$ 0.07 & 1.3801 \\ 5671.9 & Fe II 2382.765 & 0.41 $\pm$ 0.06 & 1.3804 \\ 5672.6 & Fe II 2382.765 & 0.37 $\pm$ 0.06 & 1.3807 \\ 6099.6 & Fe II 2344.214 & 0.59 $\pm$ 0.04 & 1.6020 \\ 6101.7 & Fe II 2344.214 & 0.28 $\pm$ 0.04 & 1.6029 \\ 6154.5 & Fe II 2586.650 & 0.67 $\pm$ 0.08 & 1.3794 \\ 6155.0 & Fe II 2586.650 & 0.50 $\pm$ 0.09 & 1.3798 \\ & Fe II 2365.552 & 0.50 $\pm$ 0.09 & 1.6020 \\ 6174.2 & Al III 1854.716 & 1.15 $\pm$ 0.09 & 2.3289 \\ 6178.0 & Fe II 2374.461 & 0.52 $\pm$ 0.08 & 1.6020 \\ 6187.0 & Fe II 2600.173 & 0.67 $\pm$ 0.10 & 1.3794 \\ 6187.5 & Fe II 2600.173 & 0.44 $\pm$ 0.08 & 1.3798 \\ 6188.0 & Fe II 2599.147 & 0.50 $\pm$ 0.09 & 1.3808 \\ 6201.0 & Al III 1862.790 & 0.73 $\pm$ 0.12 & 2.3289 \\ 6202.0 & Fe II 2382.765 & 0.94 $\pm$ 0.16 & 1.6028 \\ 6654.0 & Mg II 2796.352 & 1.95 $\pm$ 0.11* & 1.3796 \\ 6655.5 & Mg II 2796.352 & 1.95 $\pm$ 0.11* & 1.3802 \\ 6657.0 & Mg II 2796.352 & 0.71 $\pm$ 0.08 & 1.3808 \\ 6671.0 & Mg II 2803.531 & 1.89 $\pm$ 0.41* & 1.3796 \\ 6673.0 & Mg II 2803.531 & 1.89 $\pm$ 0.41* & 1.3802 \\ 6729.0 & Fe II 2586.650 & 0.25 $\pm$ 0.07 & 1.6016 \\ 6730.2 & Fe II 2586.650 & 0.60 $\pm$ 0.07 & 1.6020 \\ 6732.5 & Fe II 2586.650 & 0.18 $\pm$ 0.06 & 1.6029 \\ 6764.0 & Fe II 2600.173 & 0.56 $\pm$ 0.10 & 1.6015 \\ 6765.5 & Fe II 2600.173 & 0.71 $\pm$ 0.09* & 1.6020 \\ & Fe II 2599.147 & 0.71 $\pm$ 0.09* & 1.6030 \\ 6768.0 & Fe II 2600.173 & 0.46 $\pm$ 0.09 & 1.6029 \\ 6788.0 & Fe II 2607.866 & 0.14 $\pm$ 0.05 & 1.6030 \\ \hline 7274.2 & Mg II 2796.352 & 1.11 $\pm$ 0.10 & 1.6015 \\ 7275.5 & Mg II 2796.352 & 0.83 $\pm$ 0.08 & 1.6020 \\ 7277.0 & Mg II 2796.352 & 0.44 $\pm$ 0.07 & 1.6025 \\ 7278.5 & Mg II 2796.352 & 0.83 $\pm$ 0.08 & 1.6029 \\ 7293.0 & Mg II 2803.531 & 0.89 $\pm$ 0.09 & 1.6015 \\ 7294.5 & Mg II 2803.531 & 0.98 $\pm$ 0.09 & 1.6020 \\ 7296.0 & Mg II 2803.531 & 0.24 $\pm$ 0.06 & 1.6025 \\ 7297.0 & Mg II 2803.531 & 1.00 $\pm$ 0.10 & 1.6029 \\ 7803.7 & Fe II 2344.214 & 0.71 $\pm$ 0.28 & 2.3289 \\ 7931.8 & Fe II 2382.765 & 0.46 $\pm$ 0.21 & 2.3288 \\ 16520\tablefootmark{c} & [O III] 4960.295 & -(16 $\pm$ 7) & 2.3304 \\ 16679\tablefootmark{d} & [O III] 5008.240 & -(21 $\pm$ 6) & 2.3304 \\ 21863\tablefootmark{e} & H I 6564.610 & -(37 $\pm$ 10) & 2.3304 \\ \hline \end{tabular} \tablefoot{\tablefoottext{a}{Gaussian profile fitting (for non saturated lines only). Star symbols refer to complex systems.} \tablefoottext{b}{Emission line. Partially absorbed, Ly$\alpha$ flux = (1.5 $\pm$ 0.2) $\times$ 10$^{-16}$~erg~cm$^{-2}$ s$^{-1}$.} \tablefoottext{c}{Emission line [O~III] flux = $(4 \pm 3) \times 10^{-17}$~erg~cm$^{-2}$~s$^{-1}$.} \tablefoottext{d}{Emission line [O~III] flux = $(12 \pm 3) \times 10^{-17}$~erg~cm$^{-2}$~s$^{-1}$.} \tablefoottext{e}{Emission line H$\alpha$ flux = $(11 \pm 2) \times 10^{-17}$~erg~cm$^{-2}$~s$^{-1}$.}} \end{table}