J/ApJS/269/28ivo://CDS.VizieR/J/ApJS/269/28doi:10.26093/cds/vizier.22690028CDSWen Y.Zang W.Ma Bo2024-11-06T20:30:25Z2024-02-29T13:39:37ZCDS support team

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

cds-question@unistra.frgravitational-lensinginfrared-sourcessurveysastronomical-object-identificationgalactic-centerTo overcome the high optical extinction, near-infrared (NIR) observations are needed for probing the microlensing events toward the Galactic center. The 2015-2019 UKIRT microlensing survey toward the Galactic center is the first dedicated precursor NIR survey for the Nancy Grace Roman Space Telescope. Here, we analyze the online data from the UKIRT microlensing survey, reaching l=b=0{deg}. Using the event-finder algorithm of KMTNet with the {Delta}{chi}^2^ threshold of 250, we find 522 clear events, 436 possible events, and 27 possible anomalous events. We fit a point-source point-lens (PSPL) model to all the clear events and derive the PSPL parameters with uncertainties using a Markov Chain Monte Carlo method. Assuming perfect detection efficiency, we compute the uncorrected event rates, which should serve as the lower limits on the true event rate. We find that the uncorrected NIR event rates are likely rising toward the Galactic center and are higher than the optical event rates.2023ApJS..269...28Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/269/28CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/other/Nat/481.167 : 2002-2007 PLANET microlensing events (Assan+, 2012)J/ApJ/778/150 : Microlensing events toward the Bulge (Sumi+, 2013)J/MNRAS/457/4089 : Frequency of snowline-region planets (Shvartzvald+, 2016)J/ApJ/827/139 : Microlensing opt. depths from MOA-II (Sumi+, 2016)J/AJ/154/210 : 2015 high-cadence Spitzer microlensing events (Zhu+, 2017)J/AJ/155/186 : The KMTNet/K2-C9 (Kepler) Data Release (Kim+, 2018)J/ApJS/244/29 : Microlensing events toward the Galactic bulge (Mroz+, 2019)J/ApJ/889/56 : VVV survey microlensing events (Navarro+, 2020)J/AJ/161/126 : I-band LC of KMT-2017-BLG-2820 (Ryu+, 2021)J/AJ/162/163 : Systematic KMTNet Planetary Anomaly Search. I. (Zang+, 2021)http://kmtnet.kasi.re.kr/~ulens/ : KMTNet microlensing events archivehttp://ogle.astrouw.edu.pl/ogle4/ews/ews.html : OGLE-IV EWS archivehttp://www.massey.ac.nz/~iabond/moa/alerts/ : MOA Transient alerts archivehttp://exoplanetarchive.ipac.caltech.edu/docs/UKIRTMission.html : UKIRT homehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/269/28https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/269/28http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/269/28https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/269/28https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/269/28http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/269/28GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/269/28/table5 (Summary of microlensing events with observations from UKIRT and at least one other microlensing survey (OGLE, MOA, or KMTNet))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/269/28/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/269/28/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/269/28/table5?GETtext/xml+votable180.050000true265.90683306-27.373333060.005555555555555556Cone search capability for table J/ApJS/269/28/tablea1 (Parameters of the clear point source point lens microlensing events from the UKIRT survey)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/269/28/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/269/28/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/269/28/tablea1?GETtext/xml+votable180.050000true269.33126694-28.070660.0055555555555555565/7207 7212-7213 7216 6/28782 28819 28821-28823 28825-28827 28837 28839 28857 28860 28868 28870-28874 28898https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/269/28?format=asciiInfrareddefaultJ/ApJS/269/28/table5Summary of microlensing events with observations from UKIRT and at least one other microlensing survey (OGLE, MOA, or KMTNet)KB? Events names of KMTNet if available (KMT-20YY-BLG-NNNN; see also Kim+ 2018, J/AJ/155/186)meta.id.crossintnullableOB? Events names of OGLE if available (<OGLE-20YY-BLG-NNNN> in Simbad)meta.id.crossintnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDSource ID in the UKIRT database (ukirt_c_2015_a_NN_N_NNNNNNN) (1)meta.id;meta.maincharRAJ2000[263/272] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-31/-26] Declination (J2000)degpos.eq.dec;meta.mainK18Display data from Kim+ 2018, J/AJ/155/186 within 2"meta.ref.urlintnullableMB? Events names of MOA if available (MOA-20YY-BLG-NNN)meta.id.crossintnullableM19Display data from Mroz+ 2019, J/ApJS/244/29 within 0.5"meta.ref.urlintnullableJ/ApJS/269/28/tablea1Parameters of the clear point source point lens microlensing events from the UKIRT surveyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/522] UKIRT running sequence number identifiermeta.id;meta.mainintRAJ2000[263/272] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-31/-26] Declination (J2000)degpos.eq.dec;meta.mainu0[0/1.5] Impact parametersrc.impactParamfloatE_u0[0/1] Upper uncertainty in u0stat.error;stat.maxfloate_u0[0/0.6] Lower uncertainty in u0stat.errorfloatt0[7182/8731] Julian Date peak magnification; JD-24540000.0dtime.epochdoubleE_t0[0.003/7] Upper uncertainty in t0dstat.error;stat.maxfloate_t0[0.003/9] Lower uncertainty in t0dstat.errorfloattE[1.6/348] Einstein radius crossing timedtime.crossingfloatE_tE[0.07/153] Upper uncertainty in tEdstat.error;stat.maxfloate_tE[0.05/259] Lower uncertainty in tEdstat.errorfloatfbl[0.001/1] Blending parameter (1=no blending; ~0=extreme blending) (1)phot.flux;arith.ratiofloatE_fbl[0/0.8] Upper uncertainty in fblstat.error;stat.maxfloate_fbl[0/0.3] Lower uncertainty in fblstat.errorfloat