450 citations · 873 across the 2 of their papers we have counts for
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gr-qc2008★ 450 cited
Relativistic images of Schwarzschild black hole lensing
K. S. Virbhadra
We model massive dark objects at centers of many galaxies as Schwarzschild black hole lenses and study gravitational lensing by them in detail. We show that the ratio of mass of a…
gr-qc2007★ 423 cited
Time delay and magnification centroid due to gravitational lensing by black holes and naked singularities
K. S. Virbhadra, C. R. Keeton
We model the massive dark object at the center of the Galaxy as a Schwarzschild black hole as well as Janis-Newman-Winicour naked singularities, characterized by the mass and scala…