J/A+A/459/871ivo://CDS.VizieR/J/A+A/459/871doi:10.26093/cds/vizier.34590871CDSPaunzen E.Maitzen H.M.Pintado O.I.Claret A.Iliev I.K.Netopil M.2007-06-12T12:36:03Z2007-06-12T12:33:40ZCDS support team

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

cds-question@unistra.frmagellanic-cloudspeculiar-variable-starsearly-type-starsinfrared-photometryvisible-astronomybroad-band-photometrynarrow-band-photometryWe present high precision photometric Delta a observations of 417 objects in NGC 2136/7 and its surrounding field, of which five turned out to be bona fide magnetic CP stars. In addition, we discovered two Be/Ae stars. This intermediate band photometric system samples the depth of the 520nm flux depression by comparing the flux at the center with the adjacent regions with bandwidths of 11nm to 23nm. The Delta a photometric system is most suitable for detecting CP2 stars with high efficiency, but is also capable of detecting a small percentage of non-magnetic CP objects. From our investigations of NGC 1711, NGC 1866, NGC 2136/7, their surroundings, and one independent field of the LMC population, we derive an occurrence of classical chemically peculiar stars of 2.2(6)% in the LMC, which is only half the value found in the Milky Way. The mass and age distribution of the photometrically detected CP stars is not different from that of similar objects in galactic open clusters.2006A&A...459..871Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/459/871CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/459/871https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/459/871http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/459/871https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/459/871https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/459/871http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/459/871GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/459/871/table1 (Observed program stars in NGC 2136/7 and its surrounding)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/459/871/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/459/871/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/459/871/table1?GETtext/xml+votable180.050000true88.219425-69.569050.0055555555555555566/33093https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/459/871?format=asciiOpticalInfrareddefaultJ/A+A/459/871/table1Observed program stars in NGC 2136/7 and its surroundingrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1,417] Stars number sorted after X and Ymeta.id;meta.mainintRAdegRight Ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainXposX coordinatepixpos.cartesian.xfloate_Xposrms uncertainty on X coordinatepixstat.error;pos.cartesian.xfloatYposY coordinatepixpos.cartesian.y;instr.detfloate_Yposrms uncertainty on Y coordinatepixstat.error;pos.cartesian.yfloatg1-yMean (g1-y) indexmagphot.colorfloate_g1-yrms uncertainty on (g1-y)magstat.errorfloatDa? Deviation from cluster line (Delta a)magstat.fit;arith.zpfloatnullablea? Mean a index (a=g2-[(g1+y)/2])magphot.colorfloatnullablee_a? rms uncertainty on amagstat.errorfloatnullableUmag? Johnson U magnitude (1)magphot.mag;em.opt.Ufloatnullablee_Umag? rms uncertainty on U magnitudemagstat.error;phot.mag;em.opt.UfloatnullableBmag? Johnson B magnitude (1)magphot.mag;em.opt.Bfloatnullablee_Bmag? rms uncertainty on B magnitudemagstat.error;phot.mag;em.opt.BfloatnullableVmag? Johnson V magnitude (1)magphot.mag;em.opt.Vfloatnullablee_Vmag? rms uncertainty on V magnitudemagstat.error;phot.mag;em.opt.VfloatnullableImag? Johnson I magnitude (1)magphot.mag;em.opt.Ifloatnullablee_Imag? rms uncertainty on I magnitudemagstat.error;phot.mag;em.opt.IfloatnullableN[10,69] Number of measurementsmeta.numberint