J/ApJ/869/82ivo://CDS.VizieR/J/ApJ/869/82doi:10.26093/cds/vizier.18690082CDSRich J.A.Madore B.F.Monson A.J.Freedman W.L.Beaton R.L.,Clementini G.Garofalo A.Hatt D.Hoyt T.Jang I.-S.Kollmeier J.A.,Gyoon Lee M.Neeley J.R.Scowcroft V.Seibert M.2020-04-06T14:54:33Z2019-11-25T13:02:16ZCDS support team

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

cds-question@unistra.frvariable-starshst-photometryinfrared-photometryabsolute-magnitudeWe present photometry of 30 Galactic RR Lyrae variables taken with HST WFC3/IR for the Carnegie-Chicago Hubble Program. These measurements form the base of the distance-ladder measurements that comprise a pure Population II base to a measurement of Ho at an accuracy of 3%. These data are taken with the same instrument and filter (F160W) as our observations of RR Lyrae stars in external galaxies so as to minimize sources of systematic error in our calibration of the extragalactic distance scale. We calculate mean magnitudes based on one to three measurements for each RR Lyrae star using star-by-star templates generated from densely time-sampled data at optical and midinfrared wavelengths. We use four RR Lyrae stars from our sample with well-measured HST parallaxes to determine a zero-point. This zero-point will soon be improved with the large number of precise parallaxes to be provided by Gaia. We also provide preliminary calibration with the TGAS and Gaia DR2 data, and all three zero points are in agreement, to within their uncertainties.2018ApJ...869...82Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/869/82CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)J/A+AS/125/313 : RR Lyrae radial velocities and [Fe/H] I. (Fernley+ 1997)J/A+A/330/515 : RR Lyrae parallaxes & proper motions (Fernley+ 1998)J/AJ/128/2239 : JHKs photometry of 92 LMC Cepheids (Persson+, 2004)J/MNRAS/386/2115 : Type II Cepheid and RR Lyrae variables (Feast+, 2008)J/AJ/142/187 : HST obs. of 7 Pop.II variable stars (Benedict+, 2011)J/MNRAS/439/3765 : RR Lyrae in 15 Galactic globular clusters (Dambis+, 2014)J/ApJ/808/11 : RR Lyrae stars in M4. II. Spitzer/IRAC phot. (Neeley+, 2015)J/ApJ/826/56 : HST/WFC3 obs. of Cepheids in SN Ia host gal. (Riess+, 2016)J/A+A/605/A79 : TGAS Cepheids and RR Lyrae stars (Gaia Collaboration+, 2017)J/AJ/153/96 : Standard Galactic field RR Lyrae. I. Photom. (Monson+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/869/82https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/869/82http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/869/82https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/869/82https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/869/82http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/869/82GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/869/82/rrlyrae (Galactic RR Lyrae mean magnitudes (Tables 1 and 3))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/869/82/rrlyrae?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/869/82/rrlyrae?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/869/82/rrlyrae?GETtext/xml+votable180.050000true5.929540829.40100920.0055555555555555566/2089 4479 6301 7174 7518 8064 8466 10985 11098 11123 12512 15106 15220 15714 16602 18177 20097 20303 21533 28227 28582 28701 32663 33342 35151 35686 36704 40988 47342 48113https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/869/82?format=asciiInfrareddefaultJ/ApJ/869/82/rrlyraeGalactic RR Lyrae mean magnitudes (Tables 1 and 3)NameStar namemeta.id;meta.maincharprimaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNexpNumber of individual exposures for this star (link to Table 2)meta.numberintnullableNMagNumber of absolute magnitude measurements (link to Table 4)meta.numberintnullablePer[0.26/0.74] Period adopted from Monson+ (2017, J/AJ/153/96)dtime.perioddoubleObsObservation type(s) (1)meta.notecharTypeRR Lyrae type --"RRab", 21 occurrences ; or "RRc", 9 occurrences.meta.note;src.morph.typecharBlazhko[*] * = Blazhko typemeta.code.classchar[Fe/H][-2.3/-0.07] Metallicityphys.abund.ZfloatAF160W[0.006/0.09] Galactic extinction in the F160W bandmagphys.absorptionfloatLCInteractive Plotmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharF160WS[6.4/10.9] Spitzer-based intensity-averaged measured mean F160W magnitudesmagphot.mag;em.IR.H;stat.meanfloate_F160WS[0.01/0.06] Error on F160WSmagstat.errorfloatF160WT[6.4/10.9] Template-based intensity-averaged measured mean F160W magnitudesmagphot.mag;em.IR.H;stat.meanfloate_F160WT[0.01/0.08] Error on F160WTmagstat.errorfloatHmag[6.5/10.9] Mean apparent H-band magnitude (G1)magphot.mag;em.IR.HfloatM17Display data from Monson+, 2017, J/AJ/153/96meta.ref.urlchar_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.mainJ/ApJ/869/82/table2PSF photometry of individual exposures; updated version sent by the authorrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharMJD[56575.2/57379.3] Modified Julian Date of Observation, JD-2400000.5dtime.epochdoublePhase[0.0001/1.15] Phasetime.phasedoubleF160W[6.4/11] HST WFC3/IR F160W Vega magnitudemagphot.mag;em.IR.Hfloate_F160W[0.01/0.04] Uncertainty in F160Wmagstat.errorfloatJ/ApJ/869/82/table4Absolute magnitudesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceParallax source (1)meta.bibcharNameStar namemeta.id;meta.maincharHMag[-1/0.2] Absolute mean H-band magnitude (2)(G1)magphys.magAbs;em.IR.H;stat.meanfloatF160WH[-1/0.2] Absolute mean F160W magnitude using Source Parallax (2)magphys.magAbs;em.IR.H;stat.meanfloate_F160WH[0.03/0.8] Uncertainty in F160WH (2)magstat.errorfloatBlazhko[*] * = Blazhko typemeta.code.classchar