MCMC determination of the light curve parameters and accompanying uncertainties for TESS observations of α Dra in Part 1 (Sectors 14, 15, and 16). A strong correlation between parameters is present, as expected for partial (almost grazing) eclipses. The posterior distribution densities are plotted (solid contours). The histogram distributions (solid lines) are plotted across the associated quantity with 16th, 50th, and 84th percentiles levels (dashed lines).