J/MNRAS/465/2489ivo://CDS.VizieR/J/MNRAS/465/2489doi:10.26093/cds/vizier.74652489CDSTsapras Y.Arellano Ferro A.Bramich D.M.Figuera Jaimes R.Kains N.,Street R.Hundertmark M.Horne K.Dominik M.Snodgrass C.2024-08-16T20:19:54Z2017-02-07T14:02:35ZCDS support team

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

cds-question@unistra.frglobular-star-clustersvariable-starsvisible-astronomysloan-photometryWe present a study of variable stars in globular cluster NGC 6401. The cluster is only 5.3{deg} away from the Galactic Centre and suffers from strong differential reddening. The photometric precision afforded us by difference image analysis resulted in improved sensitivity to variability in formerly inaccessible interior regions of the cluster. We find 23 RRab and 11 RRc stars within one cluster radius (2.4-arcmin), for which we provide coordinates, finder-charts and time series photometry. Through Fourier decomposition of the RR Lyrae star light curves we derive a mean metallicity of [Fe/H]UVES=-1.13+/-0.06 ([Fe/H]ZW=-1.25+/-0.06), and a distance of d~6.35+/-0.81kpc. Using the RR Lyrae population, we also determine that NGC 6401 is an Oosterhoff type I cluster.2017MNRAS.465.2489Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/465/2489CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/372/69 : VR light curves of M2 variables (Lazaro+, 2006)J/MNRAS/377/741 : VIc photometry of NGC 2516 (Irwin+, 2007)J/MNRAS/384/1444 : Vr light curves of NGC 5466 RR Lyrae (Arellano Ferro+, 2008J/MNRAS/402/226 : NGC 5053 variables VrI light curves (Arellano Ferro+, 2010)J/MNRAS/413/1275 : VrI light curves of NGC6981 variables (Bramich+, 2011)J/MNRAS/416/2265 : Variable stars in NGC 5024 (M53) (Arellano Ferro+, 2011)J/MNRAS/420/1333 : NGC 5024 (M53) RR Lyrae VI light curvesJ/MNRAS/424/2722 : Variable stars in NGC 5024 (M53) (Bramich+, 2012)J/A+A/548/A92 : VrI light curves of NGC1904 variables (Kains+, 2012)J/MNRAS/434/1220 : Vi light curves of NGC6333 variables (Arellano Ferro+, 2013J/A+A/555/A36 : VrI light curves of NGC7099 variables (Kains+, 2013)J/A+A/556/A20 : Variable stars in globular NGC7492 (Figuera Jaimes+, 2013)J/MNRAS/452/727 : NGC 6229 variable VI light curves (Arellano Ferro+, 2015)J/A+A/573/A103 : Light curves for variables in 5 clusters (Skottfelt+, 2015)J/A+A/578/A128 : VI light curves of NGC4590 variables (Kains+, 2015)J/A+A/588/A128 : Variable stars in globular clusters (Figuera Jaimes+, 2016)J/A+A/592/A120 : Variable stars in NGC 6715 (Figuera Jaimes+, 2016)J/other/ApSS/361.175 : M5 RR Lyr and HB VI light curves (Arellano Ferro+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/465/2489https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/465/2489http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/465/2489https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/465/2489https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/465/2489http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/465/2489GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/465/2489/table34 (Cluster variables (34 stars, table3) and non-member variables (36 stars, table4))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/465/2489/table34?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/465/2489/table34?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/465/2489/table34?GETtext/xml+votable180.050000true264.6415417-23.90738890.0055555555555555566/29248https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/465/2489?format=asciiOpticaldefaultJ/MNRAS/465/2489/table34Cluster variables (34 stars, table3) and non-member variables (36 stars, table4)SimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMemb?[M nM] M for members, nM for non-membersphot.mag;em.IR.4-8umcharLCShow the light curvesmeta.ref.urlcharVNameVariable star ID, VNN or othermeta.id;meta.maincharOGLEOGLE ID (OGLE-BLG-RRLYR-NNNNN)meta.idcharVTypeVariable typesrc.classcharPer? Perioddtime.perioddoublenullablePerO? OGLE perioddtime.perioddoublenullableRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Delcination (J2000)pos.eq.dec;meta.main<Vmag>? Mean V magnitudemagphot.mag;em.opt.Vfloatnullable<Imag>? Mean I magnitudemagphot.mag;em.opt.IfloatnullableAg? Amplitude in g band (for members only)magsrc.var.amplitudefloatnullableAi? Amplitude in i band (for members only)magsrc.var.amplitudefloatnullableEpochEpoch (HJD-2450000)dtime.epochdouble