J/MNRAS/442/2381ivo://CDS.VizieR/J/MNRAS/442/2381doi:10.26093/cds/vizier.74422381CDSNascimbeni V.Bedin L.R.Heggie D.C.Van Den Berg M.Giersz M.,Piotto G.Brogaard K.Bellini A.Milone A.P.Rich R.M.Pooley D.,Anderson J.Ubeda L.Ortolani S.Malavolta L.Cunial A.,Pietrinferni A.2024-08-09T20:15:25Z2015-06-19T15:40:12ZCDS support team

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

cds-question@unistra.frglobular-star-clustersvariable-starshst-photometryWe present the results of a photometric search for variable stars in the core of the Galactic globular cluster Messier 4 (M 4). The input data are a large and unprecedented set of deep Hubble Space Telescope WFC3 images (large programme GO-12911; 120 orbits allocated), primarily aimed at probing binaries with massive companions by detecting their astrometric wobbles. Though these data were not optimized to carry out a time-resolved photometric survey, their exquisite precision, spatial resolution and dynamic range enabled us to firmly detect 38 variable stars, of which 20 were previously unpublished. They include 19 cluster-member eclipsing binaries (confirming the large binary fraction of M 4), RR Lyrae and objects with known X-ray counterparts. We improved and revised the parameters of some among published variables.2014MNRAS.442.2381Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/442/2381CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/120/265 : HST photometry of M4 (Ibata+, 1999)J/AJ/145/43 : CASE. V. Three eclipsing binaries in M4 (Kaluzny+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/442/2381https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/442/2381http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/442/2381https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/442/2381https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/442/2381http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/442/2381GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/442/2381/table1 (Variables found and their characteristics)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/442/2381/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/442/2381/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/442/2381/table1?GETtext/xml+votable180.050000true245.90461-26.550510.0055555555555555566/429553.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/442/2381?format=asciidefaultJ/MNRAS/442/2381/table1Variables found and their characteristicsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/38] Sequential numbermeta.recordintID[275/9050] ID code of the source according to our cataloguemeta.code;meta.tableintLCPlot of the light curvemeta.ref.urlcharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainmag.i[-16.5/-6.8] Instrumental magnitude in F467Mmagphot.magfloatVmag[13.0/22.1] Standard Johnson V magnitude from Sarajedini et al. (2007AJ....133.1658S)magphot.mag;em.opt.VfloatMm[Y/N] Membership flag derived from the VPDmeta.code.errorcharVTypeVariability class assigned by our study (5)meta.code.class;src.var.indexcharl_PerLimit flag on Permeta.code.errorcharPer[0.18/8.2]? Most probable photometric perioddtime.perioddoublenullablen_Per[*? ] Doubled or ambiguous period (1)meta.notecharONameOther star name(s) (2)meta.id;meta.maincharn_OName[+] Different variability class (3)meta.notecharNoteIndividual notes (4)meta.notecharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/442/2381/table2Light curves of the variables foundrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[275/9050] ID code of the source according to our cataloguemeta.code;meta.tableintBJDMid-exposure time in the BJD-TDB time standarddtime.epochdoublemag.i[-17.1/-5.9] Instrumental magnitude in F467Mmagphot.magdoublee_mag.i[0.0066/1] rms uncertainty on mag.imagstat.errorfloatXposX centroid position on the chippixpos.cartesian.x;instr.detdoubleYposY centroid position on the chippixpos.cartesian.y;instr.detdoubleqfit[0/0.65] Quality parameter (lower is better)meta.code.qualfloat