Image Details
Caption: Figure 14.
Caustics (pink) and critical curves (blue) for a PSBL model at tp with a fixed q = 1 with θE = 6 mas. The value of a (provided as an input to the PSBL models) varies between 3 mas, 6 mas, and 9 mas in the three panels.
© 2026. The Author(s). Published by the American Astronomical Society.