Posterior distributions for the parameters A and γ. We show fits to the RC of this work (left panel) and to that of Ou et al. (2023, right panel) including systematics uncertainties. Histograms of parameters A and γ correspond to the maximum density distribution. Red solid lines represent the median of the posterior distributions. Black dashed lines correspond to 1σ uncertainty. Blue dashed lines correspond to the slope of the Keplerian decline, n = −0.5. Green arrows indicate the slope of a flat RC (n = 0).