Extended Data Fig. 2: Fidelity in our line search.
From: Compact [C ii] emitters around a C iv absorption complex at redshift 5.7

Upper panels, number of positive (blue) and negative (that is, noise; red) peaks detected in the four ALMA datacubes (one column for each). The frequency range of each SPW is denoted at the top. Lower panels, the fidelity at given S/N with the model fit as an error function (solid red line).