Image Details
Caption: Figure 3.
Caustic geometries of the four 2L1S solutions. In each panel, the red lines show the caustic, the blue dot marks the location of the host star, the black line represents the source-lens relative trajectory, and the arrow indicates the direction of source motion. The right panels provide close-up views of the caustic-crossing regions, with the radii of the magenta circles indicating the source size.
© 2026. The Author(s). Published by the American Astronomical Society.