2000/03/31 by Thomas P. Kling, Thomas Kling, Ezra T. Newman +2 · 8 citations
Earth and Planetary Sciences · Physics and Astronomy · #Algorithm #Astrophysics #Computer science #Cosmology and Gravitation Theories #Geophysics and Gravity Measurements #Gravitational lens #Iterative method #Lens (geology) #Optics #Physics #Pulsars and Gravitational Waves Research #Simple (philosophy) #Thin lens #astro-ph #gr-qc
paper · pdf · doi:10.1103/physrevd.62.024025
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 62(2) (American Physical Society) · 23 pages, 15 figures, corrected version
openalex publication_date 2000/06/26 · arxiv created 2000/09/26 · arxiv updated 2014/11/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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 or two lenses. We show that the thin lens and iterative approaches are remarkably accurate in predicting time delays, source positions and image magnifications for a single monopole lens. However, observationally significant errors were found when the thin lens method was applied to lensing configurations with two lenses. In these cases, the iterative method remained accurate beyond observational limits.