J/A+A/548/A107ivo://CDS.VizieR/J/A+A/548/A107doi:10.26093/cds/vizier.35480107CDSLardo C.Pancino E.Mucciarelli A.MiloneA.P.2017-06-27T06:38:20Z2012-11-30T10:02:43ZCDS support team

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

cds-question@unistra.frglobular-star-clustersvisible-astronomyWide-band photometryWe present U, V photometry of the globular cluster M2. Stars within 1' and outside of 4' from the cluster center are excluded from the CMD to reduce blending effects and the field star contamination, respectively. We imposed on all stars the selection limits of CHI<2.0 and -1<SHARP<1 on DAOPHOT II photometric parameters. To select a sample of well-measured stars we have followed the procedure given in Lardo et al. (2012A&A...541A.141L), Sect. 5.1. M2 photometry displays an anomalous branch beyond the red edge of the main body of the RGB. The difference in color between stars belonging to this structure and normal RGB stars is quite large (of the order of 0.2-0.3mag, well above the typical measurement errors) and extends down to the SGB region. There may be a second group of stars that are 0.3mag redder with respect to this sequence and can possibly be more, anomalous RGB stars. The observations were carried out during the nights of 2010 July 15 at the Telescopio Nazionale Galileo (TNG) located in La Palma, Canary Islands (Spain), with he DOLORES camera. The DOLORES camera offers a field of view of 8.6'x8.6' with a 0.252"/pix scale. We obtained images of the cluster in the standard Johnson U and V filters for a total of 540s shifted in 3 single exposures in each filter. The seeing condition were average during (~1.2-1.3") during the observing night.2012A&A...548A.107Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/548/A107CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/117/2868 : BV photometry in M2 (NGC 7089) (Lee+, 1999)J/ApJS/182/509 : Blue stragglers in M2 (Dalessandro+, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/548/A107https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/548/A107http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/548/A107https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/548/A107https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/548/A107http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/548/A107GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/548/A107/table1 (Photometry of M2: selected sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/548/A107/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/548/A107/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/548/A107/table1?GETtext/xml+votable180.050000true323.36579972-0.889051110.005555555555555556Cone search capability for table J/A+A/548/A107/sample (Spectroscopic results for 39 sample stars: abundances, radial velocity and atmospheric parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/548/A107/sample?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/548/A107/sample?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/548/A107/sample?GETtext/xml+votable180.050000true323.35400056-0.879194440.0055555555555555566/190913.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/548/A107?format=asciiOpticaldefaultJ/A+A/548/A107/table1Photometry of M2: selected samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSSimbad column added by the CDSmeta.ref.urlcharID[164/21800] Star identifier (1)meta.id;meta.mainintprimaryRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainVmagThe V band magnitudemagphot.mag;em.opt.Vfloate_VmagFormal DAOPHOT errors associated to V magnitudemagstat.error;phot.mag;em.opt.VfloatU-VThe U-V color indexmagphot.color;em.opt.U;em.opt.Vfloate_UmagFormal DAOPHOT errors associated to U magnitudemagstat.error;phot.mag;em.opt.UfloatJ/A+A/548/A107/sampleSpectroscopic results for 39 sample stars: abundances, radial velocity and atmospheric parametersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1047/22170] Star identifiermeta.id;meta.mainintIDSDSSDAOPHOT ID number (1)meta.idintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainVmagV magnitudemagphot.mag;em.opt.VfloatU-VU-V colour indexmagphot.color;em.opt.U;em.opt.VfloatRVRadial velocitykm/sphys.veloc;pos.heliocentricinte_RVrms uncertainty on RVkm/sstat.errorintCNCN indexmagspect.indexfloate_CNrms uncertainty on CNmagstat.errorfloatdCNRectified {delta}CN indexmagspect.indexfloatCHCH indexmagspect.indexfloate_CHrms uncertainty on CHmagstat.errorfloatdCHRectified {delta}CH indexmagspect.indexfloatSimbadSimbad column added by the CDSmeta.ref.urlcharTeff[4630/5581] Effective temperatureKphys.temperature.effectiveintnullablee_Teffrms uncertainty on TeffKstat.error;phys.temperature.effectiveintnullablelogg[1.6/3] Surface gravitylog(cm.s**-2)phys.gravityfloatnullablee_loggrms uncertainty on logglog(cm.s**-2)stat.errorfloatnullableA(C)[5.45/6.47] Carbon abundancephys.abundfloatnullablee_A(C)rms uncertainty on A(C)stat.errorfloatnullableA(N)[6.11/7.77] Nitrogen abundancephys.abundfloatnullablee_A(N)rms uncertainty on A(N)stat.errorfloatnullable