J/A+A/466/157ivo://CDS.VizieR/J/A+A/466/157doi:10.26093/cds/vizier.34660157CDSSoto M.Minniti D.Rejkuba M.2023-05-26T13:49:14Z2007-06-17T08:37:46ZCDS support team

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

cds-question@unistra.frgravitational-lensingspectroscopyradial-velocityMicrolensing events have been observed regularly by surveys such as MACHO, OGLE and MOA. They offer an excellent way to probe the galactic structure, kinematics and stellar content. We have undertaken a follow-up study of 16 galactic microlensing events to determine masses and locations of the sources of these events within the Galaxy. Spectroscopy allows us to obtain information about the sources of the events. Low resolution spectra obtained with the Magellan I and II telescopes were analyzed to obtain radial velocities, spectral type and extinction by the method of Kane & Sahu (2003ApJ...582..743K). We also present results for the lens of the event using the microlensing light curve when possible. Light curves have been analyzed with the standard and the parallax models. We have inferred a configuration inside our galaxy for each event, and therefore a lens mass estimation using a suitable galaxy model. Lens mass determination in some cases shows massive lenses that can be considered black hole candidates. This is the case for the events MACHO-98-BLG-6, and OGLE-00-BUL-43. In our sample only three events do not have enough parallax signal for a successful estimation of the lens mass.2007A&A...466..157Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/466/157CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AcA/50/1 : OGLE microlensing events in Galactic Bulge (Udalski+, 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/466/157https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/466/157http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/466/157https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/466/157https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/466/157http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/466/157GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/466/157/table2 (Coordinates, exposure times and S/N for the microlensing event spectra and 2 reference stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/466/157/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/466/157/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/466/157/table2?GETtext/xml+votable180.050000true272.208333-30.5322220.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/466/1576/21885 28699 28716 28725 28730 28777 28792 28857 28864 28866-28868 28882 29264 30518https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/466/157?format=asciidefaultJ/A+A/466/157/table2Coordinates, exposure times and S/N for the microlensing event spectra and 2 reference starsSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameEvent designation or standard star namemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainExpTime? Exposure timestime.duration;obs.exposureintnullableS/N? Signal-to-noise ratiostat.snrintnullableFileNameName of the file containing the spectrum in sp subdirectorymeta.id;meta.filecharRun[1/2] Run numbermeta.idint