286 citations · 444 across the 16 of their papers we have counts for
4 papers · 1 filter
Image distortion from optical scalars in non perturbative gravitational lensing
Simonetta Frittelli, Thomas P. Kling, Ezra T. Newman
In a previous article concerning image distortion in non-perturbative gravitational lensing theory we described how to introduce shape and distortion parameters for small sources.…
Image distortion in non perturbative gravitational lensing
Simonetta Frittelli, Thomas P. Kling, Ezra T. Newman
We introduce the idea of {\it shape parameters} to describe the shape of the pencil of rays connecting an observer with a source lying on his past lightcone. On the basis of these…
Comparative Studies of Lensing Methods
Thomas P. Kling, Ezra T. Newman, Alejandro Perez
Predictions of the standard thin lens approximation and a new iterative approach to gravitational lensing are compared with an ``exact'' approach in simple test cases involving one…
Spacetime perspective of Schwarzschild lensing
Simonetta Frittelli, Thomas P. Kling, Ezra T. Newman
We propose a definition of an exact lens equation without reference to a background spacetime, and construct the exact lens equation explicitly in the case of Schwarzschild spaceti…