{"paper":{"title":"GRB 181201A: Spectropolarimetric Constraints on Prompt Emission and Magnetic Field Structure","arxiv_id":"2610.20580","primary_cat":"astro-ph.HE","submitted_at":"2026-10-14T17:56:28+00:00","version_compiled":"v1"},"notice":"Every quoted sentence is the authors' text from the arXiv listing abstract. Labels and probabilities are the outputs of classifier-1.13.0 on the question bank abstract-p1-20260923, exactly as returned. 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compositions.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.06,"main_claim_p":0.02,"quantitative":false,"quantitative_p":0.05,"role_probabilities":{"gap":0.16,"method":0.0,"result":0.0,"background":0.84,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.0}},{"i":2,"p":0.91,"id":"s2","own":false,"role":"background","text":"Spectropolarimetry is a powerful tool utilized to disentangle these properties.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.04,"main_claim_p":0.02,"quantitative":false,"quantitative_p":0.03,"role_probabilities":{"gap":0.0,"method":0.09,"result":0.0,"background":0.91,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.0}},{"i":3,"p":0.98,"id":"s3","own":false,"role":"background","text":"INTEGRAL/IBIS has previously detected three polarized GRBs 041219A ($65\\pm 26$%), 061122 ($>$33%) and 140206A ($>$28%).","hedge":{"p":1.0,"label":"asserted"},"own_p":0.03,"main_claim_p":0.02,"quantitative":true,"quantitative_p":0.99,"role_probabilities":{"gap":0.02,"method":0.0,"result":0.0,"background":0.98,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.0}},{"i":4,"p":1.0,"id":"s4","own":true,"role":"contribution","text":"We present the time-integrated and time-resolved analyses of the fourth-polarized GRB 181201A.","hedge":{"p":0.99,"label":"asserted"},"own_p":0.93,"main_claim_p":0.04,"quantitative":false,"quantitative_p":0.48,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":1.0,"interpretation":0.0}},{"i":5,"p":1.0,"id":"s5","own":true,"role":"result","text":"This GRB exhibits high polarization ($81.5^{+17.2}_{-15.7}$%) over three time bins with the highest signal-to-noise ratio, and the polarization angle (PA) shows a modest temporal evolution.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.96,"main_claim_p":0.2,"quantitative":true,"quantitative_p":0.99,"role_probabilities":{"gap":0.0,"method":0.0,"result":1.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.0}},{"i":6,"p":0.99,"id":"s6","own":true,"role":"result","text":"The photon index does not cross the synchrotron line-of-death and shows a hard-to-soft evolution.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.88,"main_claim_p":0.04,"quantitative":false,"quantitative_p":0.18,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.99,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.01}},{"i":7,"p":0.93,"id":"s7","own":false,"role":"interpretation","text":"A high degree of polarization (PD) tends to disfavor a photospheric emission model, as previous studies indicate that this model yields PD $<$ 20%.","hedge":{"p":0.54,"label":"asserted"},"own_p":0.07,"main_claim_p":0.13,"quantitative":true,"quantitative_p":0.99,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.0,"background":0.07,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.93}},{"i":8,"p":1.0,"id":"s8","own":true,"role":"interpretation","text":"A modest evolution in the PA points towards a non-axisymmetric jet with a multi-patch emission.","hedge":{"p":0.94,"label":"hedged_possibility"},"own_p":0.78,"main_claim_p":0.14,"quantitative":false,"quantitative_p":0.1,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":1.0}},{"i":9,"p":0.95,"id":"s9","own":true,"role":"interpretation","text":"Our results indicate that under standard synchrotron conditions, the magnetic field is coherent but lacks global structure.","hedge":{"p":0.64,"label":"hedged_possibility"},"own_p":0.86,"main_claim_p":0.45,"quantitative":false,"quantitative_p":0.07,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.05,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.95}},{"i":10,"p":0.96,"id":"s10","own":true,"role":"interpretation","text":"Moreover, the field has multiple patches, but only one or a few dominate due to high degrees of polarization, which overlap with the intrinsic maximum of synchrotron emission within 3$\\sigma$ errors.","hedge":{"p":0.96,"label":"asserted"},"own_p":0.81,"main_claim_p":0.12,"quantitative":true,"quantitative_p":0.89,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.04,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.96}},{"i":11,"p":1.0,"id":"s11","own":false,"role":"interpretation","text":"The high PD is also indicative of the Compton Drag scenario, but only under certain conditions, such as viewing the relativistic jet near its edge.","hedge":{"p":0.85,"label":"hedged_possibility"},"own_p":0.23,"main_claim_p":0.07,"quantitative":false,"quantitative_p":0.14,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":1.0}},{"i":12,"p":0.95,"id":"s12","own":true,"role":"limitation","text":"However, given our error bars and the scope for improvement in our pipeline, we cannot strongly favor either scenario; both may remain viable.","hedge":{"p":0.97,"label":"hedged_possibility"},"own_p":0.78,"main_claim_p":0.33,"quantitative":false,"quantitative_p":0.08,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.0,"background":0.0,"limitation":0.95,"future_work":0.0,"contribution":0.0,"interpretation":0.05}}]},"compiled":{"main_claim":{"p":0.65,"text":"Our results indicate that under standard synchrotron conditions, the magnetic field is coherent but lacks global 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