J/A+A/385/867ivo://CDS.VizieR/J/A+A/385/867doi:10.26093/cds/vizier.33850867CDSPaunzen E.Maitzen H.M.2003-09-15T13:17:51Z2003-09-15T13:17:34ZCDS support team

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

cds-question@unistra.fropen-star-clustersccd-photometrynarrow-band-photometryIn total, more than 550 objects within the fields of five open clusters (NGC 2439, NGC 3960, NGC 6134, NGC 6192 and NGC 6451) were investigated in order to find classical chemically peculiar stars. One bona-fide CP candidate was detected in each of the open clusters NGC 3960, NGC 6192 and NGC 6451. All three objects seem to be members of the corresponding cluster taking the results from our photometry as well as from the literature. For NGC 6192 and NGC 6451 we found widely different interstellar reddening values and therefore distances and ages in the literature. From an analysis of published Johnson UBVRI photometry, we were able to rule out a rather old age for NGC 6451. This is also supported by the finding of one peculiar object in this cluster with spectral type of about A2. Five variable objects within the field of NGC 6134 were detected. The variability exceeds 10 times (or typically 0.03 mag) the standard deviation of the weighted individual measurements. But since our observations were obtained mostly during one hour (typical integration times of five minutes per filter) on several nights within 45 days, no light curves could yet be derived. For this cluster some Am candidates were reported for which we were not able to detect a significant positive {Delta} a-value. For a description of the {Delta}a photometric system, see e.g. <GCPD/75>2002A&A...385..867Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/385/867CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/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/395/823 : Collinder 272, Pismis 20, Lynga 14, NGC 6396 and 6611J/A+A/412/721 : NGC 2099, 3114, 6204, 6705 and 6756 (Paunzen+, 2003)Table 1: Observing log.Sites: ESO: Bochum 61 cm, ESO-La SillaUTSO: Helen-Sawyer-Hogg 61 cm telescope, UTSO-Las Campanas Observatoryhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/385/867https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/385/867http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/385/867https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/385/867https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/385/867http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/385/867GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/385/867/table4 (Observed program stars of NGC 2439)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/385/867/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/385/867/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/385/867/table4?GETtext/xml+votable180.050000true115.1616825-31.717593610.005555555555555556Cone search capability for table J/A+A/385/867/table5 (Observed program stars of NGC 3960)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/385/867/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/385/867/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/385/867/table5?GETtext/xml+votable180.050000true177.64017167-55.649101670.005555555555555556Cone search capability for table J/A+A/385/867/table6 (Observed program stars of NGC 6134)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/385/867/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/385/867/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/385/867/table6?GETtext/xml+votable180.050000true246.94597611-49.2021250.005555555555555556Cone search capability for table J/A+A/385/867/table7 (Observed program stars of NGC 6192)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/385/867/table7?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/385/867/table7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/385/867/table7?GETtext/xml+votable180.050000true250.11480972-43.396701670.005555555555555556Cone search capability for table J/A+A/385/867/table8 (Observed program stars of NGC 6451)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/385/867/table8?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/385/867/table8?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/385/867/table8?GETtext/xml+votable180.050000true267.60566917-30.181408330.0055555555555555566/28822 37970-37971 39776 42210 42216 42402https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/385/867?format=asciiOpticaldefaultJ/A+A/385/867/table4Observed program stars of NGC 2439recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqNumber in NGC 2439, sorted after X and Ymeta.idintW? Notation according to White (1975ApJ...197...67W, NGC 2439 NNN)meta.idintnullableZug? Notation according to Zug (1933LicOB..16..119Z, Cl* NGC 2439 ZUG NN)meta.idintnullableXpixX-coordinate (G1)pixpos.cartesian.x;instr.detfloatYpixY-coordinate (G1)pixpos.cartesian.y;instr.detfloatVmagMean V valuemagphot.mag;em.opt.VfloataMean a indexmagphot.colorfloate_arms uncertainty on amagstat.errorfloatg1-yMean (g1-y) indexmagphot.colorfloate_g1-yrms uncertainty on (g1-y)magstat.errorfloatda(g1-y)Deviation from cluster line ({Delta}a)magstat.fit.residualdoubleB-V? (B-V) from the literaturemagphot.color;em.opt.B;em.opt.Vfloatnullableda(B-V)? Deviation from cluster line ({Delta}a)magstat.fit.residualdoublenullableNObsNumber of measurementsmeta.numberint_RAPosition computed from (Xpix,Ypix) using USNO-A2.0 coincidences (right ascension part)degpos.eq.ra;meta.main_DEPosition computed from (Xpix,Ypix) using USNO-A2.0 coincidences (declination part)degpos.eq.dec;meta.mainJ/A+A/385/867/table5Observed program stars of NGC 3960recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqNumber in NGC 3960, sorted after X and Ymeta.idintJ? Notation according to Janes (1981AJ.....86.1210J, NGC 3960 NNN))meta.idintnullableXpixX-coordinate (G1)pixpos.cartesian.x;instr.detfloatYpixY-coordinate (G1)pixpos.cartesian.y;instr.detfloatVmagMean V valuemagphot.mag;em.opt.VfloataMean a indexmagphot.colorfloate_arms uncertainty on amagstat.errorfloatg1-yMean (g1-y) indexmagphot.colorfloate_g1-yrms uncertainty on (g1-y)magstat.errorfloatda(g1-y)Deviation from cluster line ({Delta}a)magstat.fit.residualdoubleB-V? (B-V) from the literaturemagphot.color;em.opt.B;em.opt.Vfloatnullableda(B-V)? Deviation from cluster line ({Delta}a)magstat.fit.residualdoublenullableNObsNumber of measurementsmeta.numberint_RAPosition computed from (Xpix,Ypix) using USNO-A2.0 coincidences (right ascension part)degpos.eq.ra;meta.main_DEPosition computed from (Xpix,Ypix) using USNO-A2.0 coincidences (declination part)degpos.eq.dec;meta.mainJ/A+A/385/867/table6Observed program stars of NGC 6134recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqNunber in NGC 6134, sorted after X and Ymeta.idintL? Notation according to Lindoff (1972A&AS....7..231L, NGC 6134 NNNa)meta.idcharB? Notation according to Bruntt et al. (1999A&AS..140..135B, Cl* NGC 6134 BFK NNNN)meta.idintnullableXpixX-coordinate (G1)pixpos.cartesian.x;instr.detfloatYpixY-coordinate (G1)pixpos.cartesian.y;instr.detfloatVmagMean V valuemagphot.mag;em.opt.VfloataMean a indexmagphot.colorfloate_arms uncertainty on amagstat.errorfloatg1-yMean (g1-y) indexmagphot.colorfloate_g1-yrms uncertainty on (g1-y)magstat.errorfloatda(g1-y)Deviation from cluster line ({Delta}a)magstat.fit.residualdoubleb-y? (b-y) from the literaturemagphot.color;em.opt.B;em.opt.Vfloatnullableda(b-y)? Deviation from cluster line ({Delta}a)magstat.stdevdoublenullableNObsNumber of measurementsmeta.numberint_RAPosition computed from (Xpix,Ypix) using USNO-A2.0 coincidences (right ascension part)degpos.eq.ra;meta.main_DEPosition computed from (Xpix,Ypix) using USNO-A2.0 coincidences (declination part)degpos.eq.dec;meta.mainJ/A+A/385/867/table7Observed program stars of NGC 6192recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqNunber in NGC 6192, sorted after X and Ymeta.idintKF1? Notation according to Kilambi & Fitzgerald (1983BASI...11..226K, Cl* NGC 6192 KF NNN)intnullableKF2? Notation according to Kjeldsen & Frandsen (1991A&AS...87..119K, Cl* NGC 6192 KJFR NNN)intnullableXpixX-coordinate (G1)pixpos.cartesian.x;instr.detfloatYpixY-coordinate (G1)pixpos.cartesian.y;instr.detfloatVmagMean V valuemagphot.mag;em.opt.VfloataMean a indexmagphot.colorfloate_arms uncertainty on amagstat.errorfloatg1-yMean (g1-y) indexmagphot.colorfloate_g1-yrms uncertainty on (g1-y)magstat.errorfloatda(g1-y)Deviation from cluster line ({Delta}a)magstat.fit.residualdoubleB-V? (B-V) from the literaturemagphot.color;em.opt.B;em.opt.Vfloatnullableda(B-V)? Deviation from cluster line ({Delta}a)magstat.fit.residualdoublenullableNObsNumber of measurementsmeta.numberint_RAPosition computed from (Xpix,Ypix) using USNO-A2.0 coincidences (right ascension part)degpos.eq.ra;meta.main_DEPosition computed from (Xpix,Ypix) using USNO-A2.0 coincidences (declination part)degpos.eq.dec;meta.mainJ/A+A/385/867/table8Observed program stars of NGC 6451aMean a indexmagphot.colorfloatVmagMean V valuemagphot.mag;em.opt.VfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqNumber in NGC 6451, sorted after X and Ymeta.idintKF? Notation according to Kjeldsen & Frandsen (1991A&AS...87..119K, Cl* NGC 6451 KF NNN)intnullableP? Notation according to Piatti et al. (1998ApJS..116..263P, Cl* NGC 6451 PCB NNN)meta.idintnullableXpixX-coordinate (G1)pixpos.cartesian.x;instr.detfloatYpixY-coordinate (G1)pixpos.cartesian.y;instr.detfloate_arms uncertainty on amagstat.errordoubleg1-yMean (g1-y) indexmagphot.colorfloate_g1-yrms uncertainty on (g1-y)magstat.errorfloatda(g1-y)Deviation from cluster line ({Delta}a)magstat.fit.residualdoubleB-V? (B-V) from the literaturemagphot.color;em.opt.B;em.opt.Vfloatnullableda(B-V)? Deviation from cluster line ({Delta}a)magstat.fit.residualdoublenullableNObsNumber of measurementsmeta.numberint_RAPosition computed from (Xpix,Ypix) using USNO-A2.0 coincidences (right ascension part)degpos.eq.ra;meta.main_DEPosition computed from (Xpix,Ypix) using USNO-A2.0 coincidences (declination part)degpos.eq.dec;meta.main