III/176ivo://CDS.VizieR/III/176CDSLayden A.C.2018-01-04T08:21:20Z2008-11-15T15:34:36ZCDS support team

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

cds-question@unistra.frchemical-abundancesradial-velocityvariable-starspopulation-ii-starsmetallicityThis catalog presents metal abundance, distance and radial velocity data on a sample of 302 ab-type RR Lyrae variables within about 2.5 kpc of the Sun. The metal abundance information was obtained from low-medium resolution spectra, using the pseudo-equivalent widths of the Ca II K line and the the H-delta, H-gamma and H-beta lines. The technique employed was similar to Preston's (1959ApJ...130..507P) {Delta}-S method, though significant differences exist; see the source reference for details. The data were calibrated to the Zinn & West (1984ApJS...55...45Z) globular cluster abundance scale. The photometry employed in the distance determinations was primarily taken from the General Catalog of Variable Stars (1985, hereafter GCVS4). Exceptions are noted in column 29; the letters match the footnotes in Table 10 of Layden (1994AJ....108.1016L). The minimum and maximum light photometry, and rise-time were combined following Barnes & Hawley (1986ApJ...307L...9B) to give an estimate of the intensity- averaged magnitude, i.e. the magnitude the star would have if it were not variable. When the GCVS4 quoted magnitudes in passbands other than V, the GCVS4 magnitudes were transformed to the V passband using the relations established in Layden (1994AJ....108.1016L). The interstellar absorption estimates are from Burstein & Heiles (1982AJ.....87.1165B), modified by a simple dust-distribution model. The distances were computed assuming the Mv(RR)-[Fe/H] relation of Carney, Storm & Jones (1992ApJ...386..663C). Radial velocities were measured from the spectra via cross-correlation with secondary velocity standards. The velocities from the individual spectra were fit with a standard radial velocity curve in the (phase, velocity) plane, to give an estimate of the systemic (center of mass) velocity of each star. The error in this value was estimated from the scatter about the best-fit velocity curve, and the quality of the spectra employed. Other methods were used to combine the individual velocities when the situation demanded (cm = 2,3 in column 70; see Layden (1994AJ....108.1016L) for details). The observed velocities were combined with values from the literature to produce a final, best estimate of the systemic radial velocity of each star, and its error.1995AJ....110.2288Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/III/176CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=III/176https://vizier.iucaa.in/viz-bin/VizieR-2?-source=III/176http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=III/176https://vizier.cds.unistra.fr/viz-bin/votable?-source=III/176https://vizier.iucaa.in/viz-bin/votable?-source=III/176http://vizieridia.saao.ac.za/viz-bin/votable?-source=III/176GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table III/176/table1 (Data for RR Lyrae stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/III/176/table1?https://vizier.iucaa.in/viz-bin/conesearch/III/176/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/III/176/table1?GETtext/xml+votable180.050000true5.929543929.40100610.0055555555555555566/110 1663 2173 2238 2254 2484 2629 4152 4165 4219 4286 4338 4479 4762 4828 4833 4942 5182 5708 6301 6567 6744 7518 7847 8466 8512 8612 8614 8896 9027 9095 9138 9172 9429 9438 9509 9635 9769 10169 10334 10362 10524 10541 10569 10584 10638 10661 10792 10797 10802 10862 10898 10985 11098 11492 11576 11961 12463 12512 12536 12632 12743 12773 12918 13066 13171 13588 13647 13905 14504 14857 14918 14939 14994 14996 15043 15106 15120 15220 15281 16018 16022 16126 16127 16308 16342 16553 16602 16849 16867 16923 17328 17745 18080 18177 18502 18536 18578 18633 18964 19104 19110 19169 19449 19956 20020 20097 20275 20303 20497 20541 20998 21127 21146 21182 21878 21961 22338 22571 22842 23271 24866 25199 25491 25611 25768 25799 25807 25866 25953 26065 26079 26131 26170 26281 26288 26487 26515 26733 26756 26894 26981 27012 27125 27361 27474 27554 27583 27824 27833 27915 28030 28143 28222 28256 28383 28469 28582 29009 30019 30055 30868 30923 30957 31054 31335 31390 31415 31456 31648 31787 31866 31884 32254 32257 32282 32354 32636 32663 32822 32833 32856 32994 33051 33117 33121 33127 33197 33432 33465 33467 33553 33745 33996 34229 34236 34240 34537 34558 35418 35611 35724 35768 35852 35921 36048 36363 36535 36605 36704 36781 36939 37095 37544 38233 38304 38809 38942 39152 40553 40722 40767 40768 40806 40882 40911 40962 40988 40998 41022 41064 41081 41174 41191 41200 41217 41219 41227 41231 41248 41260 41283 41285 41318 41510 41991 42007 42053 43405 43491 43558 43794 43888 43977 44242 44312 44498 44559 44640 44914 44991 45062 45086 45152 45164 45241 45324 45337 45676 45741 45765 45796 45963 45992 46059 46069 46130 46204 46246 46327 46641 46650 46824 47273 47276 47327 47467 47468 47527 47618 47674 47776 47821 47959 48113 48137 48228 48290 48911 49102https://cdsarc.cds.unistra.fr/viz-bin/moc/III/176?format=asciiOpticaldefaultIII/176/table1Data for RR Lyrae starsRVfFinal systemic radial velocitykm/sspect.dopplerVeloc;pos.heliocentricintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameVariable star name (as in GCVS4)meta.id;meta.maincharFe/HMetal abundance [Fe/H]log(Sun)phys.abund.Zfloatu_Fe/HUncertainty flag (:)meta.code.error;phys.abund.Fechare_Fe/HEstimated error in [Fe/H]log(Sun)stat.error;phys.abund.Fefloato_Fe/HNumber of spectra used for [Fe/H] estimatemeta.numberintmagIntensity-averaged magnitude (B or V)magphot.mag;em.optfloatr_magReference of magnitude (see source reference)meta.refcharn_mag[BVpv] band (p=photographic, v=photovisual)meta.notecharabsInterstellar absorption in Vmagphys.absorption;em.opt.VfloatdistDistance from Sunkpcpos.distancefloate_distEstimated error in distancekpcstat.errorfloatZposDistance from the Galactic planekpcpos.distancefloatRposDistance from the Galactic centerkpcpos.distancefloatRVmMeasured systemic radial velocitykm/sspect.dopplerVelocinte_RVmEstimated error in measured radial velocitykm/sstat.errorinto_RVmNumber of spectra used for radial velocitymeta.numberintn_RVf[1,3] Radial velocity combination methodmeta.noteinte_RVfEstimated error in final radial velocitykm/sstat.errorintu_RVfMeasured and published disagreementmeta.code.errorcharSimbadSimbad column added by the CDSchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main