J/ApJ/889/56ivo://CDS.VizieR/J/ApJ/889/56doi:10.26093/cds/vizier.18890056CDSNavarro M.G.Minniti D.Pullen J.Ramos R.C.2026-09-02T14:43:35Z2021-08-06T12:32:22ZCDS support team

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

cds-question@unistra.frgalactic-centergravitational-lensinginfrared-photometryWe search for microlensing events in fields along the Galactic minor axis, ranging from the Galactic center to -3.7{deg}<b<3.9{deg} using the VISTA Variables in the Via Lactea (VVV) survey near-IR photometry. The new search is made across VVV tiles b291, b305, b319, b347, b361, and b375, covering a total area of about 11.5deg^2^. We find a total of N=238 new microlensing events in this new area, N=74, which are classified as bulge red clump (RC) giant sources. Combining them with N=122 events that we had previously reported in the Galactic center (VVV tile b333), allows us to study the latitude distribution of the microlensing events reaching the Galactic plane at b=00 for the first time. We find a very strong dependence of the number of microlensing events with Galactic latitude, a number that increases rapidly toward the Galactic center by one order of magnitude from |b|=2{deg} to b=0{deg} with a much steeper gradient than with Galactic longitude. The microlensing event population shows a flattened distribution (axial ratio b/a~1.5). The final sample shows a shorter mean timescale distribution than the Galactic plane sample for both the complete population and RC stars.2020ApJ...889...56Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/889/56CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/337 : VISTA Variables in the Via Lactea Survey DR1 (Saito+, 2012)II/364 : VIRAC. The VVV Infrared Astrometric Catalogue (Smith+, 2019)J/PASP/121/1180 : Color panorama image of the Milky Way (Mellinger+, 2009)J/ApJ/778/150 : MOA-II microlensing events toward the Bulge (Sumi+, 2013)J/MNRAS/457/4089 : Frequency of snowline-region planets (Shvartzvald+, 2016)J/A+A/609/A116 : Low extinction TGAS HR Catalogue (Ruiz-Dern+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/889/56https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/889/56http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/889/56https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/889/56https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/889/56http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/889/56GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/889/56/table2 (VVV Survey first quality microlensing events)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/889/56/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/889/56/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/889/56/table2?GETtext/xml+votable180.050000true269.4677319-31.47248160.0055555555555555565/7212 7214 6/28734-28735 28817 28819-28822 28825 28827-28828 288527.952274030004205e-20 1.0188844282367877e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/889/56?format=asciiInfrareddefaultJ/ApJ/889/56/table2VVV Survey first quality microlensing eventsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTile[291/375] Tile number (1)obs.fieldintID[1531/106680] Identifiermeta.id;meta.mainintGLON[-1.24/0.26] Galactic longitude (2)degpos.galactic.lonGLAT[-3.61/3.9] Galactic latitude (2)degpos.galactic.latKsmag[10.96/17.46] Apparent Ks band magnitude (3)magphot.mag;em.IR.Kfloatu0[0/1.5] Minimum impact parameter in Einstein radiisrc.impactParam;stat.minfloate_u0[0/2] One standard deviation error in mu0stat.errorfloatMJDModified Julian Date of event maximum magnificationdtime.epochdoublee_MJD[0.02/136] One standard deviation error in MJDdstat.error;time.epochfloattE[3.59/750] Event timescaledtime.scalefloate_tE[0.4/11456] One standard deviation error in tEdstat.errordoublefbl[0/1] Blending parameterphys.luminosity;arith.ratiofloate_fbl[0.01/102] One standard deviation error in fblstat.errorfloatOGLE"DET" indicates an OGLE detectionmeta.notecharVVVDisplay the VISTA VVV DR1 (II/337) and VIRAC (II/364) catalogs within 1.5"meta.ref.urlintnullableSimbadNameSimbad column added by the CDSmeta.idcharnullable_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.raindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decindexedJ-K[0.79/9] The (J-K) color index (3)magphot.color;em.IR.J;em.IR.KfloatAmp[0.13/2.9] Amplitudemagsrc.var.amplitude;phot.magfloat