Open Access

Fig. 6


Incidence of the brightness model complexity on the system-parameter posterior probability distribution (PPD), using unipolar models. a), b) Marginal PPDs (68%- and 95%-confidence intervals) of and for two unipolar brightness models, respectively, with a fixed and large structure (ΓSH,1) and with free-confinement structure (Γ2). A comparison with Fig. 4a shows that is constrained closer to zero. The reason is that non-uniform brightness models enable the exploration of additional dimensions of the parameter space and, therefore, provide additional adequate combinations of the contributing factors to compensate an anomalous occultation. In particular, the uniform time offset is now mainly compensated by a non-uniform BD, rather than by as in conventional analysis. It shows also the evolution of the marginal PPD toward larger when using more complex brightness models – which enable more localized brightness structure. c), d) Marginal PPDs of ρ and for, respectively, ΓSH,1 and Γ2. These show the impact of the brightness distribution on the retrieved system parameters (i.e., e-b-ρ-BD correlation); in particular, it outlines the possible overestimation of ρ by 5% (i.e., at 6σ of the conventional estimate) when using extended brightness models, e.g., a uniform brightness distribution.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.