J/A+A/358/547ivo://CDS.VizieR/J/A+A/358/547doi:10.26093/cds/vizier.33580547CDSKopacki G.2000-06-25T13:48:35Z2000-06-25T13:48:29ZCDS support team

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

cds-question@unistra.frglobular-star-clustersvariable-starsccd-photometryWe present the results of the application of the Image Subtraction Method (ISM) to the CCD observations of the central region of globular cluster M53. We have obtained good quality light curves of the 23 previously known RR Lyrae stars in this cluster. We have also confirmed the variability of ten RR Lyrae candidates discovered by Kravtsov. Moreover, we have found four new variables of this type in the core of the cluster. Altogether, the light curves have been obtained for 37 RR Lyrae stars. We also report the discovery of variations in six cluster bright giants.2000A&A...358..547Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/358/547CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/97 : Updated 3rd Cat Variable Stars in Globular Clusters (Clement+ 1997)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/358/547https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/358/547http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/358/547https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/358/547https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/358/547http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/358/547GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/358/547/table1 (Variable positions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/358/547/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/358/547/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/358/547/table1?GETtext/xml+votable180.050000true198.26666718.17250.0055555555555555566/27975 27981https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/358/547?format=asciiOpticaldefaultJ/A+A/358/547/daoDAOPHOT V-filter photometry for 19 RR Lyrae located well outside the cluster corerecnoRecord number assigned by the VizieR team. Should Not be used for identification.intVarVariable designation (VNN, Cat. <V/97>) (G1)charprimaryHJDHeliocentric Julian dayddoubleVmagV magnitudemagfloate_VmagError of V magnitudemagfloatXAirmassfloatJ/A+A/358/547/table1Variable positionsDEJ2000? Declination (J2000.0) (3)nullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.intVarVariable designation (VNN, Cat. <V/97>) (G1)charprimaryXposRelative x position from cluster center (2)arcsecfloatYposRelative y position from cluster center (2)arcsecfloatRAJ2000? Right ascension (J2000.0) (3)nullableJ/A+A/358/547/ismISM V-filter photometry of all observed variablesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intVarVariable designation (VNN, Cat. <V/97>) (G1)charprimaryHJDHeliocentric Julian dayddoubleFluxFlux (in arbitrary flux units, ADU/s)doublee_FluxError of flux (in arbitrary flux units, ADU/s)double