Spectrum of the foreground of Galaxy 4 at a redshift of z = 1.03. We extracted the spectrum over a circular aperture with a radius of 3 pixels. Left panel: full spectrum of the extracted region, which is contaminated with Lyα emission from 4C 19.71 at λ_obs ∼ 5580 Å. The cyan line shows the spectrum after it was Hanning-smoothed and the blue line indicates the zero level. Right panel: zoom-in of the line at λ_obs = 7567.95 Å in the spectrum of Galaxy 4. The redshift is determined as if the detection were the [O II] line. Such an identification is consistent with a continuum break observed in the spectrum. We believe this is likely the 4000 Å break, which is consistent with our line identification.