Combined spectra of the serendipitous Lyα emitters, in several redshift ranges from z = 2 to z = 5.9. The displayed range of flux was selected to show faint continuum features, while the peak of the Lyα line is largely off-scale. Blue dotted lines indicate different spectral features depending on the redshift range: Ly-break at 912 Å, Lyβ at 1026 Å, OI at 1303 Å, CII at 1333 Å, SiIV at 1397 Å, CIV at 1549 Å, HeII at 1640 Å and CIII at 1909 Å. The horizontal dashed lines indicate the level of zero flux.
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