J/MNRAS/496/L96ivo://CDS.VizieR/J/MNRAS/496/L96doi:10.26093/cds/vizier.74969096CDSKosenkov I.A.Veledina A.Berdyugin A.V.Kravtsov V.Piirola V.,Berdyugina S.V.Sakanoi T.Kagitani M.Poutanen J.2024-08-21T20:15:34Z2020-06-15T06:03:13ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frpolarimetryx-ray-binary-starsaccretionx-ray-sourcesWe describe the first complete polarimetric dataset of the entire outburst of a low-mass black hole X-ray binary system and discuss the constraints for geometry and radiative mechanisms it imposes. During the decaying hard state, when the optical flux is dominated by the non-thermal component, the observed polarization is consistent with the interstellar values in all filters. During the soft state, the intrinsic polarization of the source is small, ~0.15 per cent in B and V filters, and is likely produced in the irradiated disc. A much higher polarization, reaching ~0.5 per cent in V and R filters, at position angle of ~25{deg} observed in the rising hard state coincides in time with the detection of winds in the system. This angle coincides with the position angle of the jet. The detected optical polarization is best explained by scattering of the non-thermal (hot flow or jet base) radiation in an equatorial wind.2020MNRAS.496L..96Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/496/L96CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/496/L96https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/496/L96http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/496/L96https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/496/L96https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/496/L96http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/496/L96GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapX-raydefaultJ/MNRAS/496/L96/j1820polPolarization of MAXIJ1820recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian datedtime.epochdoubleFilter[BVR] Optical filterspect.dopplerVeloc.opt;em.optcharPhaseOutburst phasetime.phasecharQStokes Q%phys.polarization.stokes;arith.ratiofloatUStokes U%phys.polarization.stokes;arith.ratiofloatPDPolarisation degree%phys.polarizationfloate_PDPolarisation degree error%stat.errorfloatPAPolarisation angledegpos.posAng;phys.polarizationfloate_PAPolaristaion angle errordegstat.errorfloat