{"id":"W4415635370","doi":"10.1051/0004-6361/202555831","title":"Spatially resolved polarization swings in the supermassive binary black hole candidate OJ 287 with first Event Horizon Telescope observations","year":2025,"lang":"en","type":"article","venue":"Astronomy and Astrophysics","topic":"Astrophysical Phenomena and Observations","field":"Physics and Astronomy","cited_by":0,"is_retracted":false,"has_abstract":true,"ca_institutions":"University of Lethbridge; Canadian Institute for Theoretical Astrophysics; Canadian Institute for Advanced Research; McGill University; University of Toronto; Perimeter Institute; University of Waterloo","funders":"Los Alamos National Laboratory; Oak Ridge National Laboratory; High Energy Physics; Office of International Science and Engineering; National Key Research and Development Program of China; Agencia Estatal de Investigación; Fundação para a Ciência e a Tecnologia; Japan Society for the Promotion of Science; HORIZON EUROPE Framework Programme; Physics Division, National Center for Theoretical Sciences; National Nuclear Security Administration; Office of Science; Toray Science Foundation; East Asian Core Observatories Association; Institut Périmètre de physique théorique; Alliance de recherche numérique du Canada; National Science and Technology Council; Agencia Nacional de Investigación y Desarrollo; Ministry of Science and ICT, South Korea; Istituto Nazionale di Fisica Nucleare; National Astronomical Observatory of Japan; Shanghai Jiao Tong University; Max-Planck-Gesellschaft; Centre National de la Recherche Scientifique; Ministry of Education, India; National Natural Science Foundation of China; National Research Foundation of Korea; Generalitat Valenciana; National Science Foundation; China Postdoctoral Science Foundation; Deutsche Forschungsgemeinschaft; Nederlandse Organisatie voor Wetenschappelijk Onderzoek; Chinese Academy of Sciences; Academia Sinica; Universiteit van Amsterdam; Universidad Nacional Autónoma de México; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior; European Commission; Leverhulme Trust; National Radio Astronomy Observatory; Fundação de Amparo à Pesquisa do Estado de São Paulo; Canada Research Chairs; Natural Sciences and Engineering Research Council of Canada; Netherlands eScience Center; European Southern Observatory; John Templeton Foundation; China Scholarship Council; Ministry of Education, Culture, Sports, Science and Technology; Radboud Universiteit; National Research Foundation; University of Pretoria; Joint Institute for Computational Fundamental Science; University of Arizona; Smithsonian Institution; International Max Planck Research School for Environmental, Cellular and Molecular Microbiology; Fonds de recherche du Québec – Nature et technologies; Vetenskapsrådet; U.S. Department of Energy; Korea Astronomy and Space Science Institute; Science and Technology Facilities Council; Universiteit Leiden; Space Telescope Science Institute; National Center for Theoretical Sciences; University of Chicago; National Institutes of Natural Sciences; Government of Canada; Gordon and Betty Moore Foundation; Ministerio de Ciencia, Innovación y Universidades; CERN; National Aeronautics and Space Administration; Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México; Ministerio de Ciencia e Innovación; Flatiron Health","keywords":"Position angle; Polarization (electrochemistry); Superluminal motion; Supermassive black hole; Clockwise; Linear polarization; Telescope; Brewster's angle; Superposition principle; Active galactic nucleus","routes":{"ca_aff":true,"ca_fund":true,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0001901154,0.0001748497,0.0003166204,0.0006423282,0.0003011473,0.0006257309,0.0002397387,0.0002541191,0.000891069],"category_scores_gemma":[0.0003435256,0.0002249955,0.0002501858,0.0003934175,0.0002055058,0.0002181576,0.0005941474,0.0006270055,0.0002237948],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0003952205,"about_ca_system_score_gemma":0.0002375909,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.004249265,"about_ca_topic_score_gemma":0.01035559,"domain_scores_codex":[0.9999028,0.00000355692,0.000001957888,0.00001920961,0.00003695458,0.00003550723],"domain_scores_gemma":[0.9997758,0.00001863367,0.00006982461,0.00001860407,0.00003429146,0.00008281984],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"bench_or_experimental","study_design_gemma":"observational","study_design_scores_codex":[0.0007214658,0.0001892697,0.4771601,0.0001127201,0.000121354,0.001749872,0.0009761114,0.001159994,0.4839263,0.0007166027,0.001720992,0.03144525],"study_design_scores_gemma":[0.00001475535,0.00006242856,0.99205,0.00001256007,0.00003190814,0.0004156361,0.0001357706,0.001575552,0.004411998,0.0001389588,0.001135589,0.00001483216],"study_design_candidate":"observational","study_design_consensus":null,"genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9967448,0.000166495,0.001006203,0.00005324895,0.00001197845,0.000008794389,0.0003730045,0.00006852741,0.001567066],"genre_scores_gemma":[0.9980242,0.00006621552,0.0009891823,0.00003367029,0.00001698774,0.000004605161,0.0005514547,0.00002036294,0.0002934357],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.004249265,"threshold_uncertainty_score":0.008449078,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.007844995403991395,"score_gpt":0.2083387166529658,"score_spread":0.2004937212489744,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). 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