Fig. 7
Si ivλ1403 vs. Si iiλ1527. Red dots are from GRB spectra whereas green boxes are from quasar intervening DLA systems. For clarity, detection limits are only plotted for GRBs. Dashed lines are the average values of the line ratios (detection limits are ignored), dotted are the standard deviation of these values and dashed-dotted lines are the ratios of the average values of the distributions. See Table 8 for a summary of the line ratios.
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