{"schema":"hottub-news/story/v1","story":"st_mi4vqqvd6qsmf5zys2xq","title":"Finite-source magnification residuals from a cNFW-inspired perturbation of an effective spinning black hole binary lens","title_en":null,"outlets":1,"brief":null,"page":"https://hottub.news/stories/finite-source-magnification-residuals-from-a-cnfw-inspired-perturbation-mi4vqqvd6q","count":1,"items":[{"id":"n_mi4vqqvd6qsmf5zys2xq","seq":608224,"kind":"research","title":"Finite-source magnification residuals from a cNFW-inspired perturbation of an effective spinning black hole binary lens","url":"https://arxiv.org/abs/2607.23300","summary":"arXiv:2607.23300v2 Announce Type: replace-cross Abstract: We ask whether a cored-NFW-inspired radial perturbation leaves a finite-source magnification residual after refitting the best effective spinning vacuum binary. We compute the source flux by direct image-plane integration and vary the lens scale, separation, mass ratio, two spin magnitudes, two projected spin directions, and one phase shift. After refitting, the caustics and magnification curves are almost identical…","published":"2026-09-29T04:00:00Z","seen":"2026-09-29T07:46:41Z","lang":"en","source":{"id":"arxiv-astro-ph","name":"arXiv astro-ph (astrophysics)","domain":"arxiv.org","outlet":{"wikidata":"Q118398","name":"arXiv","type":"website","country":"US","designations":["bibliographic database","disciplinary repository","online database","open science tool","preprint server","website"]}},"via":"arxiv-astro-ph","topics":["space","astrophysics","gr-qc","astro-ph.he"],"authors":["Mohsen Fathi"],"entities":[{"id":"Q589","name":"black hole","type":"event"}],"story":"st_mi4vqqvd6qsmf5zys2xq","category":"science-technology","category_p":0.6800000071525574,"sentiment":"neutral","tone":-0.10000000149011612,"political":0.03999999910593033}]}