J/A+AS/128/573ivo://CDS.VizieR/J/A+AS/128/573CDSMaitzen H.M.Pressberger R.Paunzen E.1998-07-10T16:30:17Z1998-07-10T16:29:49ZCDS support team

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

cds-question@unistra.fram-starsvisible-astronomymedium-band-photometryResults of 131 stars from Renson's (1991, Cat. <III/162>) catalogue of Ap and Am stars observed with the {Delta}-a system are presented. With few exceptions the probability division of Renson for membership in the CP2 group of peculiar stars is nicely reflected by peculiar values of {Delta}-a. Comparison with already available {Delta}-a values yields slightly larger values due to a minor shift in the g_1_ filter sampling the depression. For a description of the {Delta}-a and Stroemgren photometric system, see e.g. <GCPD/75> and <GCPD/04>, respectively.1998A&AS..128..573Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/128/573CatalogResearchIsServedByTAP VizieR generic servicerelated-toIII/162 : General Catalogue of Ap and Am stars (Renson+ 1991)III/199 : Observed Periods of Ap and Bp stars (Catalano+ 1998)J/A+AS/121/57 : 4th supp. to the III/199 catalog (Catalano+ 1997)J/A+A/378/113 : 5th supp. to the III/199 catalog (Catalano+ 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/128/573https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/128/573http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/128/573https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/128/573https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/128/573http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/128/573GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+AS/128/573/table3Comparison of our photometry with the literatureRNSRensons number, as in Cat. <III/162>meta.idintprimaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHDHD number (Cat. <III/135>)meta.id;meta.mainintd(b-y)Difference of (b-y)_obs_ to the published valuesmagphot.color;arith.difffloatd(m1)Difference of (m1)_obs_ to the published valuesmagphot.color;arith.difffloatd(c1)Difference of (c1)_obs_ to the published valuesmagphot.color;arith.difffloatJ/A+AS/128/573/table4Program Starsb-yObserved b-ymagphot.color;em.opt.B;em.opt.VfloatHDHD number (Cat. <III/135>)meta.idintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCP[0/4] CP classmeta.code.classintNobsNumber of nightsmeta.numberintRNSRensons number, as in Cat. <III/162>meta.id;meta.mainintprimaryVmagmag(V) from Renson (1991, Cat. <III/162>)magphot.mag;em.opt.Bfloate_b-yError of b-ymagstat.errorfloatm1Observed m1magphot.colorfloate_m1Error of m1magstat.errorfloatc1Observed c1magphot.colorfloate_c1Error of c1magstat.errorfloatDaObserved {Delta}amagphot.color;arith.difffloate_DaError of {Delta}amagstat.errorfloatSpTypeSpectral type from Renson (1991, Cat. <III/162>)src.spTypechar