Fig. 6.

Fig. 6. Refer to the following caption and surrounding text.

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Zoom into the cool tip of the bluebottle diagram showing the benchmark objects (coloured dots with error bars). The spectral types are from Dominguez-Tagle et al. (2025). We overplotted typical positions for each spectral type from the curve fits (red squares) and ATMO models for a range of ages.

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