{"paper":{"title":"The Mass Distribution of the Lens Galaxy in MG1131+0456","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"C. S. Kochanek (Harvard-Smithsonian Center for Astrophysics, Department of Astronomy), G. H. Chen (Massachusetts Institute of Technology), J. N. Hewitt (Massachusetts Institute of Technology)","submitted_at":"1995-01-10T15:00:56Z","abstract_excerpt":"We present the results of modeling 5, 8 and 15 GHz maps of the gravitational lens MG1131+0456 using the LensClean algorithm. Two models for the mass distribution in the lens were fit: a de Vaucouleurs model and a model with the two-dimensional potential phi = b^{2-alpha}(r^2+s^2)^{alpha/2}/2alpha, both in an external shear field. The best fit de Vaucouleurs model has an effective radius of R_e = 0.83+-0.13 arcseconds, larger than that measured at optical wavelengths. The best fit ``alpha model'' has alpha=0.6+-0.2 and a core radius of s = 0.19 +- 0.07 arcseconds. An isothermal model (alpha=1) "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9501031","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}