J/MNRAS/532/2159ivo://CDS.VizieR/J/MNRAS/532/2159doi:10.26093/cds/vizier.75322159CDSArellano Ferro A.Zerpa Guillen L.J.Yepez M.A.Bustos Fierro I.H..,Prudil Z.Perez Parra C.E.2025-01-29T15:27:35Z2024-08-09T14:50:40ZCDS support team

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

cds-question@unistra.frglobular-star-clustersvariable-starsphotometryvisible-astronomyWe made a survey of the variable stars in a 13.2x13.2 arcmin^2^ centred on the field of the Galactic bulge cluster NGC 6558. A total of 78 variables were found in the field of the cluster. Many of these variables are included in the catalogue of variable stars in Galactic globular clusters (Clement et al. 2001), OGLE or Gaia DR3 data releases. A membership analysis based on the proper motions of Gaia DR3 revealed that many of these variables do not belong to the cluster. We employed the data from the aforementioned surveys and our own data in the VI photometric system to estimate the periods, which along with the light-curves morphology and position in a deferentially dereddened colour-magnitude diagram (CMD), help classifying the variable types. Two new member variables were found; an eclipsing binary (V18) and a semiregular SR/L (V19). In the end, we conclude that only nine variables are likely cluster members. Member variables were used to discuss the mean metallicity and distance of the parental cluster and find the average values.2024MNRAS.532.2159Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/532/2159CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)J/AcA/69/321 : OGLE RR Lyrae stars in Galactic bulge & disk (Soszynski+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/532/2159https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/532/2159http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/532/2159https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/532/2159https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/532/2159http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/532/2159GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/532/2159/tablea (*General data for variables in the field of the cluster (table A2) and crossmatch between OGLE and Gaia DR3 (table A1))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/532/2159/tablea?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/532/2159/tablea?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/532/2159/tablea?GETtext/xml+votable180.050000true272.5649583-31.76502780.0055555555555555566/28768 287702.367228618189496e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/532/2159?format=asciiOpticaldefaultJ/MNRAS/532/2159/tablea*General data for variables in the field of the cluster (table A2) and crossmatch between OGLE and Gaia DR3 (table A1)SimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintplotlcShow the light curvesmeta.ref.urlcharLC[LC] indicates available light curvesmeta.codecharVNameVariable namemeta.id;meta.maincharANameOther identifiermeta.idcharVtypeVariable typemeta.notechar<Vmag>? Mean V magnitudemagphot.mag;em.opt.Vfloatnullable<Imag>Mean I magnitudemagphot.mag;em.opt.IfloatAV? Amplitude of variation in Vmagarith.rate;phot.magfloatnullableAI? Amplitude of variation in Imagarith.rate;phot.magfloatnullablePer? Perioddtime.perioddoublenullableEpoch? Epoch (JD-2450000)dtime.epochdoublenullableRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainFlag[mfu-] Flag (1)meta.code.errorcharOGLEOGLE namemeta.idcharGaiaDR3? GaiaDR3 namemeta.idnullableJ/MNRAS/532/2159/table3VI photometry of 11 variables in the field of NGC 6558recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVNameVariable namemeta.id;meta.maincharFilter[VI] Observation filterobs.param;obscharHJDHeliocentric Julian datedtime.epochdoubleindexedmagstStandard magnitudemagphot.magfloatmaginstInstrumental magnitudemagphot.magfloate_maginstError on the magnitudemagstat.errorfloat