{"id":"W3163951092","doi":"10.3847/1538-4357/ac4970","title":"Measuring Spin from Relative Photon-ring Sizes","year":2022,"lang":"en","type":"preprint","venue":"The Astrophysical Journal","topic":"Pulsars and Gravitational Waves Research","field":"Physics and Astronomy","cited_by":3,"is_retracted":false,"has_abstract":true,"ca_institutions":"Perimeter Institute; University of Waterloo","funders":"Natural Sciences and Engineering Research Council of Canada; Ministero dello Sviluppo Economico; Gordon and Betty Moore Foundation; John Templeton Foundation; Institut Périmètre de physique théorique; Innovation, Science and Economic Development Canada; Harvard University; Government of Canada; National Science Foundation","keywords":"Physics; Event horizon; Photon; Degeneracy (biology); Spin (aerodynamics); General relativity; Horizon; Astrophysics; Black hole (networking); Einstein ring; Degenerate energy levels; Event (particle physics); Quantum mechanics; Gravitational lens; Redshift; Classical mechanics; Astronomy; Galaxy","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":[0.0004697346,0.0001526955,0.0001383506,0.0009520783,0.0002203625,0.0006736956,0.0002048934,0.0001956734,0.001666844],"category_scores_gemma":[0.002017604,0.0001425177,0.00009878985,0.00047484,0.000319203,0.0006125374,0.0005629648,0.000281976,0.0002199129],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0002288243,"about_ca_system_score_gemma":0.00006414785,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.000592094,"about_ca_topic_score_gemma":0.001660693,"domain_scores_codex":[0.9997675,0.00005285136,0.00001359027,0.00007337167,0.00006161226,0.00003114462],"domain_scores_gemma":[0.9987264,0.000337598,0.0003838815,0.000202415,0.0002151986,0.0001344995],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"simulation_or_modeling","study_design_scores_codex":[0.000862629,0.0000817458,0.722878,0.0001160222,0.0001917716,0.0001472934,0.0005644188,0.003706938,0.1691096,0.005927076,0.001537488,0.09487702],"study_design_scores_gemma":[0.00002441931,0.0001567353,0.927893,0.00003113275,0.00008782767,0.0003100232,0.0003450314,0.0120575,0.05259326,0.003546987,0.002902905,0.00005113161],"study_design_candidate":"simulation_or_modeling","study_design_consensus":null,"genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9828857,0.0001806783,0.0082881,0.00003450845,0.00002202926,0.000007996333,0.0006314169,0.0000732658,0.007876339],"genre_scores_gemma":[0.9973972,0.00004019447,0.002067342,0.00001118056,0.00001265251,0.000004938977,0.000193708,0.000008640048,0.0002642125],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.001666844,"threshold_uncertainty_score":0.005576134,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.03563082050721131,"score_gpt":0.3274551214597818,"score_spread":0.2918243009525705,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}