{"paper":{"title":"Deep radio observation of the gravitational lens candidate QSO2345+007","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Alok R. Patnaik (Max-Planck-Institut f. Radioastronomie), Peter Schneider (Max-Planck-Institut f. Astrophysik), Ramesh Narayan (Harvard-Smithonian Center for Astrophysics)","submitted_at":"1996-01-18T14:08:58Z","abstract_excerpt":"The double QSO2345+007 comprises two optical components separated by 7.1\\ arcseconds and is the most prominent `dark matter' gravitational lens candidate. Despite being known for more than a decade, optical spectroscopy and imaging have been unable to determine whether this double QSO is a binary QSO or a gravitational lens system. In this note we report a deep VLA observation of this system, yielding a map with a noise level of 8.5\\ts $\\mu$Jy per beam. We have a $4\\sigma$ detection of a radio source within one arcsecond of the optical position of the brighter A-component of the QSO, but no si"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9601093","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"}