J/A+A/663/A100ivo://CDS.VizieR/J/A+A/663/A100doi:10.26093/cds/vizier.36630100CDSHerald A.Udalski A.Bozza V.Rota P.Bond I.A.Yee J.C.Sajadian S.Mroz P.Poleski R.Skowron J.Szymanski M.K.Soszynski I.,Pietrukowicz P.Kozlowski S.Ulaczyk K.Rybicki K.A.Iwanek P.,Wrona M.Gromadzki M. (The OGLE collaboration)Abe F.Barry R.Bennett D.P.Bhattacharya A.Fukui A.Fujii H.,Hirao Y.Itow Y.Kirikawa R.Kondo I.Koshimoto N.Matsubara Y.,Matsumoto S.Miyazaki S.Muraki Y.Olmschenk G.Ranc C.Okamura A.,Rattenbury N.J.Satoh Y.Sumi T.Suzuki D.Ishitani Silva S.,Toda T.Tristram P.J.Vandorou A.Yama H. (The MOA collaboration)Beichman C.A.Bryden G.Calchi Novati S.Carey S.Gaudi B.S.,Gould A.Henderson C.B.Johnson S.Shvartzvald Y.Zhu W.(The Spitzer team)Dominik M.Hundertmark M.Jorgensen U.G.Longa-Pena P.Skottfelt J.,Tregloan-Reed J.Bach-Moller N.Burgdorf M.D'Ago G.Haikala L.,Hitchcock J.Khalouei E.Peixinho N.Rahvar S.Snodgrass C.,Southworth J.Spyratos P. (The MiNDSTEp consortium)Zang W.Yang H.Mao S.Bachelet E.Maoz D.Street R.A.Tsapras Y.,Christie G.W.Cooper T.de Almeida L.do Nascimento Jr J.-D.,Green J.Han C.Hennerley S.Marmont A.McCormick J.,Monard L.A.G.Natusch T.Pogge R.(The LCO & {mu}FUN collaboration)2022-11-25T14:07:27Z2022-07-19T13:02:46ZCDS support team

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

cds-question@unistra.frgravitational-lensingmultiple-starsexoplanetsphotometryBrown dwarfs are poorly understood transition objects between stars and planets, with several competing mechanisms having been proposed for their formation. Mass measurements are generally difficult for isolated objects but also for brown dwarfs orbiting low-mass stars, which are often too faint for spectroscopic follow-up. Microlensing provides an alternative tool for the discovery and investigation of such faint systems. Here we present the analysis of the microlensing event OGLE-2019-BLG-0033/MOA-2019-BLG-035, which is due to a binary system composed of a brown dwarf orbiting a red dwarf. Thanks to extensive ground observations and the availability of space observations from Spitzer, it has been possible to obtain accurate estimates of all microlensing parameters, including parallax, source radius and orbital motion of the binary lens. After accurate modeling, we find that the lens is composed of a red dwarf with mass M1=0.149+/-0.010M_{sun}_ and a brown dwarf with mass M2=0.0463+/-0.0031M_{sun}_, at a projected separation of a=0.585au. The system has a peculiar velocity that is typical of old metal-poor populations in the thick disk. Percent precision in the mass measurement of brown dwarfs has been achieved only in a few microlensing events up to now, but will likely become common with the Roman space telescope.2022A&A...663A.100Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/663/A100CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/663/A100https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/663/A100http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/663/A100https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/663/A100https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/663/A100http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/663/A100GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/663/A100/auckrAuckland Observatory (Wratten #12 filter)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintmaginstInstrumental magnitudemagphot.magdoublee_maginstError on instrumental magnitudemagstat.errorfloatHJDHeliocentric Julian date (HJD-2450000)dtime.epochdoubleJ/A+A/663/A100/ctioiSMARTS Cerro Tololo 1.3m (I-band)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintmaginstInstrumental magnitudemagphot.magdoublee_maginstError on instrumental magnitudemagstat.errorfloatHJDHeliocentric Julian date (HJD-2450000)dtime.epochdoubleJ/A+A/663/A100/danishrDanish 1.54m, La Silla (custom red filter)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintmaginstInstrumental magnitudemagphot.magdoublee_maginstError on instrumental magnitudemagstat.errordoubleHJDHeliocentric Julian date (HJD-2450000)dtime.epochdoubleJ/A+A/663/A100/farmuFarm Cove Observatory (unfiltered)maginstInstrumental magnitudemagphot.magdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordinte_maginstError on instrumental magnitudemagstat.errorfloatHJDHeliocentric Julian date (HJD-2450000)dtime.epochdoubleJ/A+A/663/A100/kkouKlein Karoo Observatory (unfiltered)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintmaginstInstrumental magnitudemagphot.magdoublee_maginstError on instrumental magnitudemagstat.errorfloatHJDHeliocentric Julian date (HJD-2450000)dtime.epochdoubleJ/A+A/663/A100/kumeurKumeu Observatory (Wratten #12 filter)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintmaginstInstrumental magnitudemagphot.magdoublee_maginstError on instrumental magnitudemagstat.errorfloatHJDHeliocentric Julian date (HJD-2450000)dtime.epochdoubleJ/A+A/663/A100/lcogthiLCOGT Hawaii (i'-band)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintmaginstInstrumental magnitudemagphot.magdoublee_maginstError on instrumental magnitudemagstat.errordoubleHJDHeliocentric Julian date (HJD-2450000)dtime.epochdoubleJ/A+A/663/A100/lcogtriLCOGT SAAO (i'-band)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintmaginstInstrumental magnitudemagphot.magdoublee_maginstError on instrumental magnitudemagstat.errordoubleHJDHeliocentric Julian date (HJD-2450000)dtime.epochdoubleJ/A+A/663/A100/moarMOA (custom R filter)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintmaginstInstrumental magnitudemagphot.magdoublee_maginstError on instrumental magnitudemagstat.errorfloatHJDHeliocentric Julian date (HJD-2450000)dtime.epochdoubleJ/A+A/663/A100/moavMOA (custom V filter)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintmaginstInstrumental magnitudemagphot.magdoublee_maginstError on instrumental magnitudemagstat.errorfloatHJDHeliocentric Julian date (HJD-2450000)dtime.epochdoubleJ/A+A/663/A100/ogleiOGLE (I-band)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintmaginstInstrumental magnitudemagphot.magdoublee_maginstError on instrumental magnitudemagstat.errorfloatHJDHeliocentric Julian date (HJD-2450000)dtime.epochdoubleJ/A+A/663/A100/opdiObservtorio Pico dos Dias (unfiltered)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintmaginstInstrumental magnitudemagphot.magdoublee_maginstError on instrumental magnitudemagstat.errorfloatHJDHeliocentric Julian date (HJD-2450000)dtime.epochdoubleJ/A+A/663/A100/spitzerlSpitzer (lambda=3.6 micron)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintmaginstInstrumental magnitudemagphot.magdoublee_maginstError on instrumental magnitudemagstat.errordoubleHJDHeliocentric Julian date (HJD-2450000)dtime.epochdouble