Continuum images at 2 mm (right) and spectra from the 2 mm (top) and 3 mm (bottom) bands of the Herschel bright galaxies HerBS-89, HerBS-113, and HerBS-154. In the case of HerBS-154, one of the emission lines shown is H₂O (2₁₁–2₀₂). Continuum contours are plotted starting at 3σ in steps of 5σ for HerBS-89 [49], and 2σ in steps of 1σ and 2σ for HerBS-113 [308] and HerBS-154 [82], respectively, where the numbers in brackets are the local noise levels σ for each source in μJy beam⁻¹. See caption of Fig. 3 for further details.