J/MNRAS/434/1220ivo://CDS.VizieR/J/MNRAS/434/1220doi:10.26093/cds/vizier.74341220CDSArellano Ferro A.Bramich D.M.Figuera Jaimes R.Giridhar S.Kains N.,Kuppuswamy K.Jorgensen U.G.Alsubai K.A.Andersen J.M.Bozza V.,Browne P.Calchi Novati S.Damerdji Y.Diehl C.Dominik M.Dreizler S.,Elyiv A.Giannini E.Harpsoe K.Hessman F.V.Hinse T.C.Hundertmark M.,Juncher D.Kerins E.Korhonen H.Liebig C.Mancini L.Mathiasen M.,Penny M.T.Rabus M.Rahvar S.Ricci D.Scarpetta G.Skottfelt J.,Snodgrass C.Southworth J.Surdej J.Tregloan-Reed J.Vilela C.,Wertz O.2024-10-22T20:17:29Z2013-10-16T09:27:23ZCDS support team

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

cds-question@unistra.frglobular-star-clustersvariable-starsccd-photometryWe report CCD V and I time series photometry of the globular cluster NGC 6333 (M9). The technique of difference image analysis has been used, which enables photometric precision better than 0.05mag for stars brighter than V~19.0mag, even in the crowded central regions of the cluster. The high photometric precision has resulted in the discovery of two new RRc stars, three eclipsing binaries, seven long-term variables and one field RRab star behind the cluster. A detailed identification chart and equatorial coordinates are given for all the variable stars in the field of our images of the cluster. Our data together with the literature V-data obtained in 1994 and 1995 allowed us to refine considerably the periods for all RR Lyrae stars. The nature of the new variables is discussed. We argue that variable V12 is a cluster member and an Anomalous Cepheid. Secular period variations, double-mode pulsations and/or the Blazhko-like modulations in some RRc variables are addressed. Through the light-curve Fourier decomposition of 12 RR Lyrae stars we have calculated a mean metallicity of [Fe/H]_ZW_=-1.70+/-0.01(statistical)+/-0.14(systematic) or [Fe/H]_UVES_=-1.67+/-0.01(statistical)+/-0.19(systematic). Absolute magnitudes, radii and masses are also estimated for the RR Lyrae stars. A detailed search for SX Phe stars in the Blue Straggler region was conducted but none were discovered. If SX Phe exist in the cluster then their amplitudes must be smaller than the detection limit of our photometry. The colour-magnitude diagram has been corrected for heavy differential reddening using the detailed extinction map of the cluster of Alonso-Garcia et al. (2012, Cat. J/AJ/143/70). This has allowed us to set the mean cluster distance from two independent estimates; from the RRab and RRc absolute magnitudes, we find 8.04+/-0.19 and 7.88+/-0.30kpc, respectively.2013MNRAS.434.1220Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/434/1220CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/89/1707 : Photographic observations of M9 variable stars (Clement+, 1984)J/AJ/112/618 : CCD photometry of variable stars in M9 (Clement+, 1996)J/AJ/101/1352 : Observations of variable stars in M9 (Clement+, 1991)J/AJ/118/453 : M9 RR Lyrae CCD observations (Clement+, 1999)J/AJ/143/70 : Differential reddening in Milky Way globularshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/434/1220https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/434/1220http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/434/1220https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/434/1220https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/434/1220http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/434/1220GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/434/1220/table3 (*General data for all of the confirmed variables in NGC 6333 in the FOV of our images.)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/434/1220/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/434/1220/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/434/1220/table3?GETtext/xml+votable180.050000true259.8263333-18.53933330.0055555555555555566/29291 29377https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/434/1220?format=asciidefaultJ/MNRAS/434/1220/table3*General data for all of the confirmed variables in NGC 6333 in the FOV of our images.VNameVariable name (V1 to V34, V22-V34 are new), <Cl* NGC 6333 SAW VNN> in Simbadmeta.id;meta.maincharprimarySimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLCShow the light curvesmeta.ref.urlcharVTypeVariable type (1)src.classcharn_VType[c] c: Possibly EAmeta.notechar<Vmag>Average V magnitudemagphot.mag;em.opt.Vfloat<imag>? Average i magnitudemagphot.mag;em.opt.Ifloatnullablel_AVLimit flag on AVmeta.code.errorcharAVAmplitude in V bandmagsrc.var.amplitudefloatn_AV[b] b: Depth of eclipsemeta.notecharl_AiLimit flag on Aimeta.code.errorcharAi? Amplitude in i bandmagsrc.var.amplitudefloatnullablen_Ai[b] b: Ai lists the depth of eclipsemeta.notecharPer? Period, from this workdtime.perioddoublenullablen_Per[d] d: the real period may be twice this valuemeta.notecharbeta? Secular period change {beta}=dP/dtd/Myrarith.rate;time.periodfloatnullableHJDmax? Time of maximum eclipse (HJD-2450000)dtime.epochdoublenullablen_HJDmax[a] a: Time of minimum lightmeta.notecharPer1? Period from Clements papers (2)dtime.perioddoublenullableRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainJ/MNRAS/434/1220/table2V and i light curvesmagstStandard magnitudemagphot.magfloatmagInstrumental magnitudemagphot.magfloate_magError on the magnitudemagstat.error;phot.magfloatFrefReference flux (in ADU/s)s**-1phot.flux.density;em.optdoublee_FrefError on the reference flux (in ADU/s)s**-1stat.errorfloatDFluxDifferential flux (in ADU/s)s**-1phot.flux;arith.ratiodoublee_DFluxError on the differential flux (in ADU/s)s**-1stat.errorfloatp[0.3/1.4] Photometric scale factorarith.factorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVNameVariable name, VNNmeta.id;meta.maincharTel[2.0H 1.5LS] Telescope: 2.0H=2m telescope in Hanle; 1.5LS=1.54m telescope in La Silla, ESO.meta.id;instr.telcharFltr[VI] Observation filter (V or I)obs.param;obscharHJDHeliocentric Julian datedtime.epochdoubleindexed