J/AJ/119/2274ivo://CDS.VizieR/J/AJ/119/2274doi:10.26093/cds/vizier.51192274CDSIvanov V.D.Borissova J.Alonso-Herrero A.Russeva T.2023-04-06T16:50:37Z2000-05-31T21:37:42ZCDS support team

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

cds-question@unistra.frglobular-star-clustershertzsprung-russell-diagraminfrared-photometryInfrared JKs-band photometry of the Galactic globular clusters M15 and, for the first time, M56 is presented. We estimate the reddening [E(B-V) = 0.18 {=/-} 0.08 mag] and distance modulus [(m - M)V = 15.43 {+/-} 0.30 mag] toward the poorly studied globular cluster M56. We combine our data with observations of other clusters from the literature (12 in total) to extend the [Fe/H] versus red giant branch (RGB) slope relation toward metal-poor clusters.2000AJ....119.2274Ihttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/119/2274CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/303/468 : Spectrospcopy, IR-photom. in globular clusters (Minniti, 1995)J/A+A/331/70 : JKVI photometry of NGC 6553 stars (Guarnieri+ 1998)J/AJ/109/1131 : JHK Photometry in Metal Rich Globulars. (Kuchinski+ 1995)J/AJ/110/2844 : JHK photometry of globular clusters. III. (Kuchinski+ 1995)J/AJ/109/1154 : JHK Photometry of Liller 1 (Frogel+ 1995)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/119/2274https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/119/2274http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/119/2274https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/119/2274https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/119/2274http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/119/2274GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfrareddefaultJ/AJ/119/2274/table2Photometry of globular clusters M15 and M56XpixCCD X coordinate relative to cluster centerpixfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intClusterCluster namecharNumberObject number in Cluster (1)intYpixCCD Y coordinate relative to cluster centerpixfloatKmagThe K_s_ filter magnitude (Persson et al. 1998AJ....116.2475P)magfloat(J-K)The (J-K_s_) colormagfloate_KmagDAOPHOT errors for KmagmagfloatEJMagDAOPHOT errors for the J filtermagfloat