Gravitational lensing by rotating Simpson-Visser black holes

We investigate gravitational lensing by rotating Simpson-Visser black hole in the strong field limit and find that deflection angle alpha(D), photon sphere radius xm and ratio of the flux of the first image to all other images rmag decreases. In contrast, angular position theta(1), angular separation s increases more rapidly with l and their behaviour is similar to that of the Kerr black hole. By considering the supermassive black holes NGC 4649, NGC 1332, Sgr A* and M87* as rotating Simpson-Visser black holes, we found that the latter can be quantitatively distinguished from the Kerr black hole when probed by gravitational lensing effects. The deviation of the lensing observables..1 and.s by considering the Sgr A* and M87* as rotating Simpson-Visser black holes from Kerr black hole for 0 < l/2M < 0.6 (a/2M = 0.45) are in the range 0.0422 - 0.11658 mu as and 0.031709 - 0.08758 mu as, which are too small to be distinguished by the current Event Horizon Telescope observations, and one has to wait for future observations by new generation EHT that can pin down the exact constraint.