Fig. A.3
Metal absorption lines in the X-shooter spectrum of GRB 120909A. Red dashed lines indicate velocity components. Resolution in VIS arm: v = 30.1 km s-1. The continuum in Mg ii 1239/1240 and S ii 1250 is affected by the Lyman-α red damping wing. The extra absorption apparent in Fe ii 1611 is from the excited state transition Fe ii 5s 1612.
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