H I 21 cm absorption associated with J2339−5523. Zero velocity corresponds to z_em = 1.3531. Individual Gaussian components (Table 1) and the combined best-fit model are overplotted as dashed (green) and continuous lines (red), respectively. The residuals from the fit (magenta curve) and the 1σ uncertainty on the normalized flux density (shaded region in gray), arbitrarily offset for clarity, are also shown.