II/15ivo://CDS.VizieR/II/15CDSMagnenat P.2017-12-05T05:09:49Z1997-12-09T16:00:07ZCDS support team

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

cds-question@unistra.frvisible-astronomyWide-band photometrytwo-color-diagramsIn the UBVr photometric system defined by Sandage and Smith (1963), (U-B)20, (B-V)20, and (V-r)20 color indices are given for stars from ten reference lists, along with a LID coded number, V magnitude, number of observations and reference. A list of weighted means is included for stars appearing on more than one list. The reference list and an explanation of the coded numbering system are included in separate files. Introduction: The UBVr system is defined by Sandage and Smith (1963). The then recent availability of photomultipliers with S20 cathodes sensitive to the wavelength range 3000 to 8000 A suggested that the customary tricolor photometric system could be extended to include a red point close to 6700 A. The V-r color index can be employed as a good indicator of effective temperature, thanks to its relatively small blanketing effect, compared to B-V. Sandage and Smith also tried to obtain the U, B and V colors as closely as possible to those of Johnson and Morgan's system. In 1960, 64 standard stars of the UBV system (Johnson and Morgan 1953; Johnson and Harris 1954) were measured. Comparison of colors obtained in the natural photometric system ubvr 20 with colors from Johnson, Morgan and Harris give: B-V = 1.100(b-v)20 + 1.023 +/-0.004 +-/0.003 U-B = 1.015(u-b)20 - 1.575 +/-0.003 +/-0.006 (Sandage and Smith 1963) These equations show that the UBVr 20 system is close to the UBV system without being identical. Means were calculated for stars appearing in multiple references according to the customary manner at CDS, based on the number of measures and the weight of each list. All ten lists were given weight 4.CDS Internal Report No. 6 (1973)https://cdsarc.cds.unistra.fr/viz-bin/cat/II/15CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toGCPD/69 : The General Catalogue of Photometric Data, maintainedhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=II/15https://vizier.iucaa.in/viz-bin/VizieR-2?-source=II/15http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=II/15https://vizier.cds.unistra.fr/viz-bin/votable?-source=II/15https://vizier.iucaa.in/viz-bin/votable?-source=II/15http://vizieridia.saao.ac.za/viz-bin/votable?-source=II/15GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table II/15/mean (Weighted means for stars in multiple lists)https://vizier.cds.unistra.fr/viz-bin/conesearch/II/15/mean?https://vizier.iucaa.in/viz-bin/conesearch/II/15/mean?http://vizieridia.saao.ac.za/viz-bin/conesearch/II/15/mean?GETtext/xml+votable180.050000true286.9912125-15.23423220.0055555555555555565/5886 6/75 137 309 336 339 340 341 342 348 349 357 456 472 647 684 798 840 932 1024 1032 1033 1035 1042 1058 1102 1175 1556 1847 1875 2317 2476 2536 2747 2873 2923 2997 3005 3020 3102 3214 3639 3657 3693 3712 3725 3737 3760 3814 3819 4041 4072 4298 4444 4698 4699 4709 5033 5073 5269 5624 5670 5853 6066 6126 7225 7229 7264 7582 7950 8278 8288 8333 8476 8534 8597 8671 8687 8788 8790 8843 8845 8850 9061 9083 9127 9327 9339 9382 9476 9537 9571 9602 9648 9684 9801 9835 9847 9857 10173 10328 10375 10568 10781 10899 10966 11126 11159 11403 11449 11473 11534 11560 11642 11671 11851 11869 11982 12115 12621 12658 12865 12890 12914 13013 13020 13087 13244 13282 13301 13414 13440 13484 13557 13628 13688 13743 13778 13882 13966 14278 14297 14298 14385 14418 14522 14533 14621 14667 14906 15021 15135 15174 15185 15363 15391 15392 15462 15583 15597 15621 15631 15676 15713 15747 15861 15865 15962 15999 16069 16078 16105 16115 16158 16245 16308 17028 17136 17245 17398 17425 18139 18416 18839 19141 19277 19286 19323 19347 19560 19585 19912 19923 20159 20178 20203 20278 20308 20337 20390 20404 21060 21136 21328 21432 21879 22040 22300 22818 23023 23096 23230 23313 23321 23339 23369 23383 23454 23493 23501 23511 23515 23523 23525 23526 23527 23529 23533 23535 23536 23537 23538 23548 23695 24099 24127 24151 24218 24358 24411 24420 24713 24924 25246 25973 26216 26302 26457 26552 26758 26975 27374 27498 28014 28173 28233 28559 28564 28605 28664 29055 29196 29490 29593 29855 30196 30233 30518 30529 30543 30577 30579 30640 30694 30730 30761 30965 31011 31087 31094 31101 31172 31475 31478 31751 31757 31776 31784 32192 32335 32343 32372 32619 32645 32662 32708 32757 33552 34345 34446 34817 34896 35079 36365 36664 36693 36697 36745 37408 38461 39232 39284 40078 44284 44903 45050 45334 45485 45564 46925 49049 490633.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/II/15?format=asciiOpticaldefaultII/15/refsReferences to individual listsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintref[9001/9010] Reference numbermeta.id;meta.maininttextReference (multiline)meta.ref;pos.framecharII/15/obsObservations of UBVr 20 colorsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLIDCoded number (see codes.txt)meta.id;meta.maindoublem_LID[D12] Multiplicity code (1)meta.code.multipcharU-B20? (U-B)20 indexmagphot.color;em.opt.U;em.opt.BfloatnullableB-V20? (B-V)20 indexmagphot.color;em.opt.B;em.opt.VfloatnullableV-r20(V-r)20 indexmagphot.color;em.opt.V;em.opt.Rfloatn_NobsRemark about Nobs (2)meta.notecharNobs[0/29]? Number of measurementsmeta.numberintnullableVmag? V magnitudemagphot.mag;em.opt.Vfloatnullableref[9001/9010]? Reference number (see refs.dat)meta.idintnullableII/15/meanWeighted means for stars in multiple listsSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLIDCoded number (see codes.txt)meta.id;meta.maindoubleprimarym_LID[D12] Multiplicity code (1)meta.code.multipcharU-B20? (U-B)20 indexmagphot.color;em.opt.U;em.opt.BfloatnullableB-V20? (B-V)20 indexmagphot.color;em.opt.B;em.opt.VfloatnullableV-r20(V-r)20 indexmagphot.color;em.opt.V;em.opt.RfloatVmag? V magnitudemagphot.mag;em.opt.VfloatnullableNrSimbad column added by the CDSmeta.numberintnullable_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.mainnullable_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainnullable