Wobble amplitude confidence interval estimation for a range of small amplitudes. The pink dots represent the quantiles $q_{50}^{\hat{A}}$ estimated from the respective input amplitudes, while the error bars indicate the estimated confidence intervals ${\mathcal{I}}_A=[q_{2.5}^{\hat{A}},q_{97.5}^{\hat{A}}]$. The coloured dotted and dashed lines show one example of a signal with true amplitude A = 0.8 mas, where ℐ_A= [0.61,1.02] mas, and where these limits are considered to be input values (${\hat{A}}_{\text{min}}$ and ${\hat{A}}_{\text{max}}$) from a signal with unknown amplitude (see text).