Grasso, MicheleMicheleGrassoVILLA, EleonoraEleonoraVILLA2025-03-252025-03-2520210264-9381http://hdl.handle.net/20.500.12386/36949BiGONLight, Bilocal Geodesic Operators framework for Numerical Light propagation, is a new tool for light propagation in numerical relativity. The package implements the bilocal geodesic operators formalism, a new framework for light propagation in general relativity. With BiGONLight it is possible to extract observables such as angular diameter distance, luminosity distance, magnification as well as new real-time observables like parallax and redshift drift within the same computation. As a test-bed for our code we consider two exact cosmological models, the ΛCDM and the inhomogeneous Szekeres model, and a simulated dust Universe. All our tests show an excellent agreement with known results.STAMPAenArticle10.1088/1361-6382/ac35aa2-s2.0-85122426881https://iopscience.iop.org/article/10.1088/1361-6382/ac35aahttps://api.elsevier.com/content/abstract/scopus_id/85122426881FIS/05 - ASTRONOMIA E ASTROFISICA