J/AJ/120/3111ivo://CDS.VizieR/J/AJ/120/3111doi:10.26093/cds/vizier.51203111CDSAnthony-Twarog B.J.Twarog B.A.2023-04-06T16:50:40Z2010-07-17T14:24:46ZCDS support team

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

cds-question@unistra.frglobular-star-clustersvisible-astronomymedium-band-photometryCCD photometry extending below the turnoff of the globular cluster NGC 6397 on the uvbyH{beta} system is presented and analyzed. Restricting the sample to stars with small photometric errors and highly probable cluster membership, the reddening from approximately 1500 stars at the turnoff is E(b-y)=0.127+/-0.002 (standard error of the mean), equivalent to E(B-V)=0.179+/-0.003. The photometric abundance for the same sample, on the revised spectroscopic scale for globular clusters, is [Fe/H]=-1.82+/-0.04 (standard error of the mean). From 220 cluster red giants, well-defined relations are established for m_1_ and c_1_ as a function of b-y.2000AJ....120.3111Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/120/3111CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/119/2282 : Stromgren photometry of IC 4651 (Anthony-Twarog+, 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/120/3111https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/120/3111http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/120/3111https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/120/3111https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/120/3111http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/120/3111GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/120/3111/table2 (CCD Photometry in NGC 6397)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/120/3111/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/120/3111/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/120/3111/table2?GETtext/xml+votable180.050000true265.0786586-53.68452030.0055555555555555566/42076https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/120/3111?format=asciiOpticaldefaultJ/AJ/120/3111/table1Photoelectric photometry in NGC 6397recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStellar identification (1)meta.id;meta.maincharVmag? V-band magnitudemagphot.mag;em.opt.Vfloatnullablee_Vmag? uncertainty in Vmagmagstat.error;phot.mag;em.opt.Vfloatnullableb-y? b-y color indexmagphot.color;em.opt.B;em.opt.Vfloatnullablee_b-y? uncertainty in b-ymagstat.error;phot.color;em.opt.BfloatnullableNyb? Number of stars observed in y and bmeta.numberintnullablem1? m_1_ metallicity-sensitive index magnitudemagphot.colorfloatnullablee_m1? uncertainty in m1magstat.errorfloatnullablec1? c_1_ band magnitudemagphot.colorfloatnullablee_c1? uncertainty in c1magstat.errorfloatnullableNvu? Number of stars observed in u and vmeta.numberintnullableSimbadNameSimbad column added by the CDSmeta.idcharJ/AJ/120/3111/table2CCD Photometry in NGC 6397recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStellar identification (1)meta.id;meta.maincharXposX position on the CCDpixpos.cartesian.x;instr.detfloatYposY position on the CCDpixpos.cartesian.y;instr.detfloatVmagV-band magnitudemagphot.mag;em.opt.Vfloate_Vmaguncertainty in Vmagmagstat.error;phot.mag;em.opt.Vfloatb-yb-y color indexmagphot.color;em.opt.B;em.opt.Vfloate_b-yuncertainty in b-ymagstat.error;phot.color;em.opt.Bfloatm1m_1_ metallicity-sensitive index magnitudemagphot.colorfloate_m1uncertainty in m1magmagstat.errorfloatc1c_1_-band magnitudemagphot.colorfloate_c1uncertainty in C1magmagstat.errorfloatbetaH{beta}-band magnitudemagphot.color;em.opt.B;em.line.Hbetafloate_betauncertainty in betamagstat.errorfloatNyNumber of stars observed in ymeta.numberintNbNumber of stars observed in bmeta.numberintNvNumber of stars observed in vmeta.numberintNuNumber of stars observed in umeta.numberintNwNumber of stars observed in {beta}-widemeta.numberintNnNumber of stars observed in {beta}-narrowmeta.numberint_RAPosition computed from a comparison with 2MASS (Cat. II/246) ({sigma}=0.17'') (right ascension part)degpos.eq.ra;meta.main_DEPosition computed from a comparison with 2MASS (Cat. II/246) ({sigma}=0.17'') (declination part)degpos.eq.dec;meta.mainJ/AJ/120/3111/table3Normal sequences for NGC 6397betaH{beta}-band magnitudemagphot.color;em.opt.B;em.line.HbetafloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTypeStellar type (Giants, AGB or BHB)src.classcharVmagV-band magnitudemagphot.mag;em.opt.Vfloate_Vmag? uncertainty in Vmagmagstat.error;phot.mag;em.opt.Vfloatnullableb-yb-y color indexmagphot.color;em.opt.B;em.opt.Vfloate_b-y? uncertainty in b-ymagstat.error;phot.color;em.opt.Bfloatnullablem1m_1_ metallicity-sensitive index magnitudemagphot.colorfloate_m1? uncertainty in m1magstat.errorfloatnullableNybv? Number of stars observed in y, b and vmeta.numberintnullablec1c_1_-band magnitudemagphot.colorfloate_c1? uncertainty in c1magstat.errorfloatnullableNu? Number of stars observed in umeta.numberintnullablee_beta? uncertainty in betamagstat.errorfloatnullableNbeta? Number of stars observed in {beta}meta.numberintnullable