Spectra of the two most ultraluminous LAEs. Bottom: COLA1 Top: CR7. CR7's velocity is in the reference frame of the galaxy’s He II line, giving a peak Lyα at ﹩160\;\mathrm{km}\;{{\rm{s}}}^{-1}﹩. COLA1 is plotted with the peak at the same offset. Under this assumption the blue side extends to ﹩\sim -200\;\mathrm{km}\;{{\rm{s}}}^{-1}﹩. Both objects also show a continuum break across the line. The black overlay shows the composite z = 6.6 LAE profile of Hu et al. (2010), normalized to match the maximum in each of the objects.