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Fig. 6

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Similar to Fig. 1, but for GRB 070721B (z = 3.6298). Object D4 is the host galaxy. Object D3 is the galaxy counterpart to the intervening DLA (z = 3.094) towards GRB 070721B. The impact parameter of the DLA galaxy is 1′′ (7.9 kpc). The line of sight of object D7 also traverses a DLA at z = 3.085. The distance between objects D3 and D7 is 216, corresponding to a projected distance of 167.4 kpc at z = 3.09. The inset is a 5′′ zoom-in on the position of D3. The afterglow position is marked by the cross-hair.

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