Measurement of the Kerr spin parameter by observation of a compact object’s shadow

DETECTING FLARING STRUCTURES IN SAGITTARIUS A* WITH HIGH-FREQUENCY VLBI

(2009) Sheperd S. Doeleman et al.   ASTROPHYSICAL JOURNAL

Relativistic images of Schwarzschild black hole lensing

(2009) K. S. Virbhadra   PHYSICAL REVIEW D

Apparent shape of super-spinning black holes

(2009) Cosimo Bambi et al.   PHYSICAL REVIEW D

Event-horizon-scale structure in the supermassive black hole candidate at the Galactic Centre

(2008) Sheperd S. Doeleman et al.   NATURE

Optical caustics of Kerr spacetime: The full structure

(2008) V. Bozza   PHYSICAL REVIEW D

Time delay and magnification centroid due to gravitational lensing by black holes and naked singularities

(2008) K. S. Virbhadra et al.   PHYSICAL REVIEW D

Hidden symmetries, null geodesics, and photon capture in the Sen black hole

(2008) Kenta Hioki et al.   PHYSICAL REVIEW D

Gravitational lensing by rotating naked singularities

(2008) Galin N. Gyulchev et al.   PHYSICAL REVIEW D