Different microlensing regions inferred from the Embedded PL (NRSur) analysis, showing the multimodality in the posteriors, related to the properties of the micro-images. We identified a very subdominant mode with four images (black, 4% of samples) and three main modes with two images, which can be classified in terms of the time delay between them Δt₀₁: ∼22 ms (red, 43%), ∼44 ms (blue, 38%) and ∼66 ms (green, 15%). The best fit is provided by the mode at ∼44 ms (blue); see Figure A2 for the best-fitting results for each of the modes.