J/AJ/144/186ivo://CDS.VizieR/J/AJ/144/186doi:10.26093/cds/vizier.51440186CDSKuehn C.A.Smith H.A.Catelan M.Pritzl B.J.De Lee N.Borissova J.2017-09-22T16:16:16Z2014-01-17T14:07:49ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsglobular-star-clustersvariable-starsvisible-astronomybroad-band-photometryThis is the second in a series of papers studying the variable stars in Large Magellanic Cloud globular clusters. The primary goal of this series is to study how RR Lyrae stars in Oosterhoff-intermediate systems compare to their counterparts in Oosterhoff I/II systems. In this paper, we present the results of our new time-series B-V photometric study of the globular cluster NGC 1786. A total of 65 variable stars were identified in our field of view. These variables include 53 RR Lyraes (27 RRab, 18 RRc, and 8 RRd), 3 classical Cepheids, 1 Type II Cepheid, 1 Anomalous Cepheid, 2 eclipsing binaries, 3 Delta Scuti/SX Phoenicis variables, and 2 variables of undetermined type. Photometric parameters for these variables are presented. We present physical properties for some of the RR Lyrae stars, derived from Fourier analysis of their light curves. We discuss several different indicators of Oosterhoff type which indicate that the Oosterhoff classification of NGC 1786 is not as clear cut as what is seen in most globular clusters.2012AJ....144..186Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/144/186CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/239 : History and Accurate Positions for the NGC/IC Objects (Corwin, 2004)J/AJ/142/107 : Variable stars in NGC 1466 (Kuehn+, 2011)J/MNRAS/405/839 : Spectroscopy of globular clusters (Sharina+, 2010)J/AcA/60/1 : VI light curves of LMC delta Scuti stars (Poleski+, 2010)J/AcA/59/1 : VI light curves of LMC RR Lyrae stars (Soszynski+, 2009)J/AcA/58/293 : Type-II and anomalous Cepheids in LMC (Soszynski+, 2008)J/AcA/58/163 : VI light curves of LMC classical Cepheids (Soszynski+, 2008)J/ApJS/161/304 : Star clusters in Milky Way & satellites (McLaughlin+, 2005)J/AcA/53/93 : OGLE RR Lyrae in LMC (Soszynski+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/144/186https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/144/186http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/144/186https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/144/186https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/144/186http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/144/186GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/144/186/table3 (Photometric parameters for the RRd variables in NGC 1786)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/144/186/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/144/186/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/144/186/table3?GETtext/xml+votable180.050000true74.719167-67.7316110.005555555555555556Cone search capability for table J/AJ/144/186/table2 (Photometric parameters for variables in NGC 1786, excluding RRd stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/144/186/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/144/186/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/144/186/table2?GETtext/xml+votable180.050000true74.71375-67.7399170.0055555555555555566/33123https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/144/186?format=asciiOpticaldefaultJ/AJ/144/186/table3Photometric parameters for the RRd variables in NGC 1786recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVnoVariable numbermeta.id;meta.mainintprimaryRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainType[RRd] Variable typemeta.code;src.varcharP0Fundamental mode perioddtime.periodfloatP1First overtone perioddtime.periodfloatP1/P0Period ratiodtime.period;arith.ratiofloatLCPlot of the light curvesmeta.ref.urlcharVamp0? Fundamental mode amplitude in V bandmagsrc.var.amplitudefloatnullableVamp1? First overtone amplitude in V bandmagsrc.var.amplitudefloatnullableBamp0? Fundamental mode amplitude in B bandmagsrc.var.amplitudefloatnullableBamp1? First overtone amplitude in B bandmagsrc.var.amplitudefloatnullable<Vmag>? Intensity-weighted V mean magnitudemagphot.mag;em.opt.Vfloatnullable<Bmag>? Intensity-weighted B mean magnitudemagphot.mag;em.opt.Bfloatnullable<B-V>? Magnitude-weighted B-V mean color indexmagphot.color;em.opt.B;em.opt.VfloatnullableType2OGLE-III variable type (G2)meta.code;src.varcharOGLEOptical Gravitational Lensing Experiment-III (OGLE-III) database numbermeta.idintSimbadSimbad column added by the CDSmeta.ref.urlcharJ/AJ/144/186/table4Photometry of the variable starse_dflux? Error in dfluxstat.errordoublenullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVnoVariable numbermeta.id;meta.mainintFlt[BV] Filter (B or V)meta.id;instr.filtercharHJDHeliocentric Julian Datedtime.epochdoublePhasePhase (1)time.phasedoublemag? Magnitude in Flt (2)magphot.magfloatnullablee_mag? Error in magmagstat.error;phot.magfloatnullabledflux? Differential flux in Flt (2)phot.flux.density;em.optdoublenullableTelTelescope (SOAR or SMARTS) (G1)meta.id;instr.telcharJ/AJ/144/186/table1Observing logrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsUT date of observationstime.epoch;obsnullableFlt[BV] Filter (B or V)meta.id;instr.filtercharExpExposure timestime.duration;obs.exposurefloatSeeingSeeingarcsecinstr.obsty.seeingdoubleTelTelescope (SOAR or SMARTS) (G1)meta.id;instr.telcharJ/AJ/144/186/table2Photometric parameters for variables in NGC 1786, excluding RRd starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVnoVariable numbermeta.id;meta.mainintprimaryn_Vno[Field BL] Peculiarity (1)meta.notecharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainu_Type[?] Variable of undetermined typemeta.notecharTypeVariable type (RRab, RRc, Delta Scuti, AC, Ceph, T2Ceph, Eclipse) (2)meta.code;src.varcharPerPerioddtime.perioddoublePer2? Second value of period (3)dtime.periodfloatnullableLCPlot of the light curvesmeta.ref.urlcharVamp? Amplitude in V bandmagphot.mag;em.opt.VfloatnullableBamp? Amplitude in B bandmagphot.mag;em.opt.Bfloatnullable<Vmag>? Intensity-weighted V mean magnitudemagphot.mag;em.opt.Vfloatnullable<Bmag>? Intensity-weighted B mean magnitudemagphot.mag;em.opt.Bfloatnullable<B-V>? Magnitude-weighted mean B-V color indexmagphot.color;em.opt.B;em.opt.VfloatnullableType2OGLE-III variable type (G2)meta.code;src.varcharOGLE? Optical Gravitational Lensing Experiment-III (OGLE-III) database numbermeta.idintnullableOGLE2? Other OGLE-III database number (5)meta.idintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar