J/ApJ/898/46ivo://CDS.VizieR/J/ApJ/898/46doi:10.26093/cds/vizier.18980046CDSDekany I.Grebel E.K.2023-11-10T16:11:07Z2021-12-08T11:26:48ZCDS support team

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

cds-question@unistra.frvariable-starsinfrared-photometryAiming to extend the census of RR Lyrae stars to highly reddened low-latitude regions of the central Milky Way, we performed a deep near-IR variability search using data from the VISTA Variables in the Via Lactea (VVV) survey of the bulge, analyzing the photometric time series of over a hundred million point sources. In order to separate fundamental-mode RR Lyrae (RRab) stars from other periodically variable sources, we trained a deep bidirectional long short-term memory recurrent neural network (RNN) classifier using VVV survey data and catalogs of RRab stars discovered and classified by optical surveys. Our classifier attained a ~99% precision and recall for light curves with signal-to-noise ratio above 60, and is comparable to the best-performing classifiers trained on accurate optical data. Using our RNN classifier, we identified over 4300 hitherto unknown bona fide RRab stars toward the inner bulge. We provide their photometric catalog and VVV J,H,Ks photometric time series.2020ApJ...898...46Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/898/46CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/348 : VISTA Variable in the Via Lactea Survey DR2 (Minniti+, 2017)I/345 : Gaia DR2 (Gaia Collaboration, 2018)II/364 : VIRAC. The VVV Infrared Astrometric Catalogue (Smith+, 2019)J/A+A/312/111 : [Fe/H] from RR Lyrae light curves (Jurcsik+, 1996)J/A+A/475/1159 : Supervised classif. of variable stars (Debosscher+, 2007)J/AcA/61/1 : VI light curves of Galactic Bulge RR Lyrae (Soszynski+, 2011)J/ApJS/203/32 : Machine-learned ASAS Classif. Cat. (MACC) (Richards+, 2012)J/ApJS/213/9 : Catalina Surveys periodic variable stars (Drake+, 2014)J/AcA/64/177 : VI light curves of Galactic Bulge RR Lyrae (Soszynski+, 2014)J/ApJ/821/L25 : Bulge RR Lyrae RV Assay (BRAVA-RR) (Kunder+, 2016)J/AcA/66/405 : Gal. bulge eclipsing & ellipsoidal binaries (Soszynski+, 2016)J/AJ/153/204 : RR Lyrae stars from the PS1 3{pi} survey (Sesar+, 2017)J/AcA/67/297 : OGLE Galactic center Cepheids and RR Lyrae (Soszynski+, 2017)J/ApJ/863/79 : RR Lyrae cand. in the Galactic Center (Contreras Ramos+, 2018)J/ApJ/857/54 : JHKs photometry of VVV RR Lyrae stars (Dekany+, 2018)J/ApJ/869/82 : Carnegie-Chicago Hubble Program: RR Lyrae obs. (Rich+, 2018)J/other/ApSS/363.127 : Bulge RR Lyrae VVVDR4 photometry (Majaess+, 2018)J/A+A/622/A60 : Gaia DR2 misclassified RR Lyrae list (Clementini+, 2019)J/ApJ/883/58 : Cepheids from VVV in southern Gal. midplane (Dekany+, 2019)J/MNRAS/484/4833 : Oosterhoff dichotomy in Galactic bulge (Prudil+, 2019)J/other/Sci/365.478 : Milky Way classical Cepheids sample (Skowron+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/898/46https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/898/46http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/898/46https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/898/46https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/898/46http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/898/46GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/898/46/table3 (Coordinates and basic photometric properties of the RRab stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/898/46/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/898/46/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/898/46/table3?GETtext/xml+votable180.050000true255.9593333-34.87688890.0055555555555555564/1800 1803 1806-1807 2653 5/7204 7206-7209 7211 7218-7219 7222-7223 7272 7313 7316-7317 10591 10617 10620-10621 6/28681-28684 28686-28687 28702-28703 28705 28712 28714-28715 28718-28720 28730 28769 28772-28773 28775 28781 28783 28786 28790 28792-28793 28795 28820 28822-28823 28840-28841 28843 28866-28867 28870-28871 28881-28883 28887 28969 28971 28973 29064 29066-29067 29096 29098 29188-29189 29200-29201 29204-29206 29248-29250 29272 29276-29277 29440 29442 42356 42358-42359 42361-42363 42439 42445 42447 42476-42477 42488-42489 42492-42493 424958.643406281242892e-20 9.976379296888241e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/898/46?format=asciiInfrareddefaultJ/ApJ/898/46/table3Coordinates and basic photometric properties of the RRab starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNpNumber of photometric measurements (link to Table 4)meta.numberintnullableID[1/13250] Object identifiermeta.id;meta.mainintprimaryRA_ICRS[17/18] Hour of Right ascension (ICRS)pos.eq.ra;meta.mainindexedDE_ICRS[18/40] Degree of Declination (ICRS)pos.eq.dec;meta.mainPer[0.28/0.98] Pulsation perioddtime.perioddoubleKsmag[12/16.3] Magnitude of intensity mean in VISTA Ks-bandmagphot.mag;em.IR.KfloatTotAmp[0.05/0.7] Total (peak-to-valley) Ks-band amplitudemagsrc.var.amplitudefloatAp[1/4] Optimal photometric aperture; see Section 3.2instr.fovintS/N[30.4/522] Signal-to-noise ratio in Ks-band light curvestat.snrfloatProb[0.5/1]? Classification probability scoremeta.code.class;stat.probabilityfloatnullableGaiaDR2? Gaia DR2 (I/345) source identifiermeta.id.crossnullableOGLE? OGLE source identifier (<OGLE BLG-RRLYR-NNNNN> in Simbad)meta.id.crossintnullableSCatDisplay data from Soszynski+, 2014, J/AcA/64/177 and 2017, J/AcA/67/297 within 1"meta.ref.urlintnullableCommSource remark flag (1)meta.code.errorcharVVVDisplay data from the VVV DR2 cat. (II/348) and VIRAC cat. (II/364) within 0.5"meta.ref.urlcharLCInteractive LC Plotmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/ApJ/898/46/table4Photometric time-series of the RRab starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/13250] Object identifiermeta.id;meta.mainintHJD[55272.3/57934.1] Observation day; HJD-2400000.0dtime.epochdoubleindexedFiltVISTA photometric passband (J, H or Ks)meta.code;instr.filtercharPawprint[253/928304] Identifier (1)meta.idintChip[1/16] Number of the VIRCAM chipmeta.id;instrintmag[11.86/19.53] Apparent magnitude in Filtmagphot.magfloate_mag[0.003/0.4] Error in magmagstat.error;phot.magfloat