Examples of a spectral fit in Os, Ir, and Pt lines. Black markers show observed spectra. The red solid line indicates the best fit. The blue dash-dotted line shows the spectrum with the species of interest removed. Orange shaded areas are the ±0.3 dex interval around the best fit. Species creating the strongest surrounding lines are labelled in the insets, with the hyperfine–isotopic splitting marked when considered in the line list. The darkest shades of grey indicate the strongest lines.