J/MNRAS/458/3012ivo://CDS.VizieR/J/MNRAS/458/3012doi:10.26093/cds/vizier.74583012CDSWyrzykowski L.Kostrzewa-Rutkowska Z.Skowron J.Rybicki K.A.Mroz P.,Kozlowski S.Udalski A.Szymanski M.K.Pietrzynski G.Soszynski I.,Ulaczyk K.Pietrukowicz P.Poleski R.Pawlak M.Ilkiewicz K.,Rattenbury N.J.2024-08-16T20:16:09Z2017-07-03T10:34:35ZCDS support team

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

cds-question@unistra.frgravitational-lensingmilky-way-galaxystellar-distancestellar-massesMost stellar remnants so far have been found in binary systems, where they interact with matter from their companions. Isolated neutron stars and black holes are difficult to find as they are dark, yet they are predicted to exist in our Galaxy in vast numbers. We explored the OGLE-III data base of 150 million objects observed in years 2001-2009 and found 59 microlensing events exhibiting a parallax effect due to the Earth's motion around the Sun. Combining parallax and brightness measurements from microlensing light curves with expected proper motions in the Milky Way, we identified 13 microlensing events which are consistent with having a white dwarf, neutron star or a black hole lens and we estimated their masses and distances. The most massive of our black hole candidates has 9.3M_{sun}_ and is at a distance of 2.4kpc. The distribution of masses of our candidates indicates a continuum in mass distribution with no mass gap between neutron stars and black holes. We also present predictions on how such events will be observed by the astrometric Gaia mission.2016MNRAS.458.3012Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/458/3012CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/216/12 : OGLE-III Galactic bulge microlensing events (Wyrzykowski+ 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/458/3012https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/458/3012http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/458/3012https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/458/3012https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/458/3012http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/458/3012GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/458/3012/table2 (Parallax microlensing events found in OGLE-III.)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/458/3012/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/458/3012/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/458/3012/table2?GETtext/xml+votable180.050000true271.2032917-29.67530560.005555555555555556Cone search capability for table J/MNRAS/458/3012/table3 (Microlensing parallax model parameters as obtained from MCMC modelling for 13 dark remnant candidate events)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/458/3012/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/458/3012/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/458/3012/table3?GETtext/xml+votable180.050000true271.20328-29.67530.0055555555555555565/7205 7217 6/28716 28718 28722 28729-28732 28735 28776-28777 28779 28782 28804 28819 28828 28857 28864-28866 28873 28882-28883 28910 292502.367228618189496e-19 2.6706780932288093e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/458/3012?format=asciidefaultJ/MNRAS/458/3012/table2Parallax microlensing events found in OGLE-III.SimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLensLens name OGLE3-ULENS- (PAR-NNN)meta.id;meta.maincharOGLEOGLE DB ID (BLGNNN.N.NNNNNN)meta.idcharRAJ2000Rigth ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainEWSOGLE III EWS matches, YYYY-BLG-NNNmeta.idcharLengthLength of the light curve (1)phys.sizefloatJ/MNRAS/458/3012/table3Microlensing parallax model parameters as obtained from MCMC modelling for 13 dark remnant candidate eventsE_tEhError on tEh (upper value)dstat.error;stat.maxfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLensLens name OGLE3-ULENS- (PAR-NNN) (1)meta.id;meta.maincharOGLEOGLE DB ID (BLGN.NNNNNN)meta.idchart0Median time of the closest lens-source approachdtime.epochfloatE_t0Error on t0 (upper value)dstat.error;stat.maxfloate_t0Error on t0 (lower value)dstat.errorfloattEEinstein radius crossing time (the events time-scale)dtime.epochfloatE_tEError on tE (upper value)dstat.error;stat.maxfloate_tEError on tE (lower value)dstat.errorfloatmu0Minimum impact parametersrc.impactParamdoubleE_mu0Error on mu0 (upper value)stat.error;stat.maxdoublee_mu0Error on mu0 (lower value)stat.errordoublepiENNorth component of the parallax vector piEpos.parallaxfloatE_piENError on piEN (upper value)stat.error;stat.maxfloate_piENError on piEN (lower value)stat.errorfloatpiEEEast component of the parallax vector piEpos.parallaxfloatE_piEEError on piEE (upper value)stat.error;stat.maxfloate_piEEError on piEE (lower value)stat.errorfloatI0Baseline magnitudemagphot.mag;em.opt.IfloatE_I0Error on I0 (upper value)magstat.error;stat.maxfloate_I0Error on I0 (lower value)magstat.errorfloatfsBlending parameter (ratio of the source flux contribution to the total baseline flux)phys.luminosity;arith.ratiofloatE_fsError on fs (upper value)stat.error;stat.maxfloate_fsError on fs (lower value)stat.errorfloattEhHeliocentric frame time-scales of eventdtime.epochfloate_tEhError on tEh (lower value)dstat.errorfloatchi2Best chi2stat.fit.chi2;meta.modelledfloatdofDegree of freedomstat.fit.dofintt0BestBest time of the closest lens-source approachdtime.epochfloattEBestBest Einstein radius crossing timedtime.epochfloatmu0BestBest minimum impact parametersrc.impactParam;stat.mindoublepiENBestBest North component of the parallax vector piEpos.parallaxfloatpiEEBestBest East component of the parallax vector piEpos.parallaxfloatI0BestBest baseline magnitudemagphot.mag;em.opt.IfloatfsBestBest blending parameterphys.luminosity;arith.ratiofloattEhBestBest heliocentric frame time-scales of eventdtime.epochfloatRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.maint0parReference timedtime.epochfloatJ/MNRAS/458/3012/table5Most probable (1-D median and 1{sigma}) masses, distances and total blend luminosities for all events with Red Clump sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLensLens name OGLE3-ULENS- (PAR-NNN)meta.id;meta.maincharMassMost probable masssolMassphys.massfloatE_MassError on Mass (upper value)solMassstat.error;stat.maxfloate_MassError on Mass (lower value)solMassstat.error;phys.massfloatDistMost probable distancekpcpos.distance;pos.heliocentricfloatE_DistError on Dist (upper value)kpcstat.error;stat.maxfloate_DistError on Dist (lower value)kpcstat.errorfloatBlendMost probable total blend luminositymagphys.luminosityfloatE_BlendError on Blend (upper value)magstat.error;stat.maxfloate_BlendError on Blend (lower value)magstat.errorfloatSolu0[+/-] Solution for u0 (1)meta.codecharSolpiEN[+/-] Solution for piEN (1)meta.codechar