Close-up of the Hα spectral region of MRC0156-003. We show the spectrum with the best fit superimposed (thick black line). Thin black lines show each individual fit component. The lower panel shows the fit residual. The line at λ = 2.03 μm is the [SII]λλ6716, 6731 doublet, where the two components are blended. At wavelengths shortward of 1.9 μm the atmospheric transmission drops to  <10%.