top panel: for the full sample, the distribution of rest-frame EW if the lines are identified as Lyα (black histogram) or as [OII]3727 (red histogram). The filled histograms show objects without a detected continuum, for which the EW is a lower limit. lower panel: the same as the top panel, but for the 49 lines identified as ambiguous. The blue and green histograms represent respectively the rest-frame EW if the lines are identified as Lyα or as [OII]3727.
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