J/A+A/412/721ivo://CDS.VizieR/J/A+A/412/721doi:10.26093/cds/vizier.34120721CDSPaunzen E.Pintado O.I.Maitzen H.M.2004-03-24T14:47:14Z2004-03-24T15:44:26ZCDS support team

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

cds-question@unistra.fropen-star-clustersccd-photometrynarrow-band-photometryWe have investigated 1008 objects in the area of five intermediate age open clusters (NGC 2099, NGC 3114, NGC 6204, NGC 6705 and NGC 6756) via the narrow band {Delta}a-system. The detection limit for photometric peculiarity is very low (always less than 0.009mag) due to the high number of individual frames used (193 in total). We have detected six peculiar objects in NGC 6705 and NGC 6756 from which one in the latter is almost certainly an unreddened late type foreground star. The remaining five stars are probably cluster members and bona fide chemically peculiar objects (two are {lambda} Bootis type candidates). Furthermore, we have investigated NGC 3114, a cluster for which already photoelectric {Delta}a-measurements exist. A comparison of the CCD and photoelectric values shows very good agreement. Again, the high capability of our CCD {Delta}a-photometric system to sort out true peculiar objects together with additional measurements from broad or intermediate band photometry is demonstrated.2003A&A...412..721Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/412/721CatalogResearchIsServedByTAP VizieR generic servicerelated-toGCPD/75 : Maitzen (1976A&A....51..223M) {delta} photometryJ/A+A/371/L5 : CCD {Delta}a-photometry of NGC 1866 (Maitzen+, 2001)J/A+A/373/153 : NGC 2489, 2567, 2658, 5281 and 6208 (Paunzen+, 2001)J/A+A/385/867 : NGC 2439, 3960, 6134, 6192 and 6451 (Paunzen+, 2002)J/A+A/395/823 : Collinder 272, Pismis 20, Lynga 14, NGC 6396 and 6611Table 1: Observing loghttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/412/721https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/412/721http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/412/721https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/412/721https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/412/721http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/412/721GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/412/721/table4Observed program stars of NGC 2099recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqNotation for stars sorted after X and Ymeta.idintWEBDANotation according to WEBDAmeta.idintXposX-coordinate on CCDpixpos.cartesian.x;instr.detfloatYposY-coordinate on CCDpixpos.cartesian.y;instr.detfloatVmagMean V valuemagphot.mag;em.opt.VfloataMean a index (a = g2 - [(g1+y)/2])magphot.color;arith.difffloate_aSigma amagstat.errorfloatg1-yMean (g1-y) indexmagphot.color;arith.difffloate_g1-ySigma (g1-y)magstat.errorfloatda(g1-y)Deviation from cluster line ({Delta}a)magphot.color;arith.difffloatB-V(B-V) from the literaturemagphot.color;em.opt.B;em.opt.Vfloatda(B-V)Deviation from cluster line ({Delta}a)magphot.color;arith.difffloatJ/A+A/412/721/table5Observed program stars of NGC 3114recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqNotation for stars sorted after X and Ymeta.idintCP? Notation according to Carraro & Patat (2001A&A...379..136C) Cl* NGC 3114 CP NNNN in Simbadmeta.idintnullableJM? Notation according to Jankowitz & McCosh (1963MNSSA..22...18J), NGC 3114 NNN in Simbadmeta.idintnullableXposX-coordinate on CCDpixpos.cartesian.x;instr.detfloatYposY-coordinate on CCDpixpos.cartesian.y;instr.detfloatVmagMean V valuemagphot.mag;em.opt.VfloataMean a index (a = g2 - [(g1+y)/2])magphot.color;arith.difffloate_aSigma amagstat.errorfloatg1-yMean (g1-y) indexmagphot.color;arith.difffloate_g1-ySigma (g1-y)magstat.errorfloatda(g1-y)Deviation from cluster line ({Delta}a)magphot.color;arith.difffloatJ/A+A/412/721/table6Observed program stars of NGC 6204recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqNotation for stars sorted after X and Ymeta.idintKF? Notation according to Kjeldsen & Frandsen (1991A&AS...87..119K) Cl* NGC 6204 KF NNN in Simbadmeta.idintnullableXposX-coordinate on CCDpixpos.cartesian.x;instr.detfloatYposY-coordinate on CCDpixpos.cartesian.y;instr.detfloatVmagMean V valuemagphot.mag;em.opt.VfloataMean a index (a = g2 - [(g1+y)/2])magphot.color;arith.difffloate_aSigma amagstat.errorfloatg1-yMean (g1-y) indexmagphot.color;arith.difffloate_g1-ySigma (g1-y)magstat.errorfloatda(g1-y)Deviation from cluster line ({Delta}a)magphot.color;arith.difffloatB-V? (B-V) from the literaturemagphot.color;em.opt.B;em.opt.Vfloatnullableda(B-V)? Deviation from cluster line ({Delta}a)magstat.stdevfloatnullableObsNumber of observationsmeta.numberintJ/A+A/412/721/table7Observed program stars of NGC 6705recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqNotation for stars sorted after X and Ymeta.idintSBL? Notation according to Sung et al. (1999MNRAS.310..982S) Cl* NGC 6705 SBL NNNNNN in Simbadmeta.idintnullableWEBDA? Notation according to WEBDAmeta.idintnullableXposX-coordinate on CCDpixpos.cartesian.x;instr.detfloatYposY-coordinate on CCDpixpos.cartesian.y;instr.detfloatVmagMean V valuemagphot.mag;em.opt.VfloataMean a index (a = g2 - [(g1+y)/2])magphot.color;arith.difffloate_aSigma amagstat.errorfloatg1-yMean (g1-y) indexmagphot.color;arith.difffloate_g1-ySigma (g1-y)magstat.errorfloatda(g1-y)Deviation from cluster line ({Delta}a)magphot.color;arith.difffloatB-V? (B-V) from the literaturemagphot.color;em.opt.B;em.opt.Vfloatnullableda(B-V)? Deviation from cluster line ({Delta}a)magstat.stdevfloatnullableObsNumber of observationsmeta.numberintJ/A+A/412/721/table8Observed program stars of NGC 6756XposX-coordinate on CCDpixpos.cartesian.x;instr.detfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqNotation for stars sorted after X and Ymeta.idintWEBDA? Notation according to WEBDAmeta.idintnullableYposY-coordinate on CCDpixpos.cartesian.y;instr.detfloatVmagMean V valuemagphot.mag;em.opt.Vfloata? Mean a index (a = g2 - [(g1+y)/2])magphot.color;arith.difffloatnullablee_a? Sigma amagstat.errorfloatnullableg1-yMean (g1-y) indexmagphot.color;arith.difffloate_g1-ySigma (g1-y)magstat.errorfloatda(g1-y)? Deviation from cluster line ({Delta}a)magphot.color;arith.difffloatnullableb-y? (b-y) from the literaturemagphot.color;em.opt.B;em.opt.Vfloatnullableda(b-y)? Deviation from cluster line ({Delta}a)magstat.stdevfloatnullableObsNumber of observationsmeta.numberint