... GRB 060218/SN 2006aj

Based on observations obtained at the ESO VLT under ESO programme 076.A-0737(A).

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... VPFIT

See http://www.ast.cam.ac.uk/~rfc/vpfit.html

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... measured

More Na I lines are detected in low z SDSS QSO spectra, but no column density measurements are reported for these systems (V. Wild, private communication).

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