J/ApJ/794/107ivo://CDS.VizieR/J/ApJ/794/107doi:10.26093/cds/vizier.17940107CDSRich J.A.Persson S.E.Freedman W.L.Madore B.F.Monson A.J.,Scowcroft V.Seibert M.2017-07-03T13:49:52Z2017-05-16T15:31:20ZCDS support team

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

cds-question@unistra.frgalaxiesvariable-starsinfrared-photometryWe present a revised distance to the nearby galaxy NGC 6822 using a new multi-band fit to both previously published and new optical, near-, and mid-infrared data for Cepheid variables. The new data presented in this study include multi-epoch observations obtained in 3.6 {mu}m and 4.5 {mu}m with the Spitzer Space Telescope taken for the Carnegie Hubble Program. We also present new observations in J, H, and K_s_ with FourStar on the Magellan Baade Telescope at Las Campanas Observatory. We determine mean magnitudes and present new period-luminosity relations in V, I, J, H, K_s_, Infrared Array Camera 3.6 {mu}m, and 4.5 {mu}m. In addition to using the multi-band distance moduli to calculate extinction and a true distance, we present a new method for determining an extinction-corrected distance modulus from multi-band data with varying sample sizes. We combine the distance moduli and extinction for individual stars to determine E(B-V)=0.35+/-0.04 and a true distance modulus {mu}_o_=23.38+/-0.02_stat_+/-0.04_sys_.2014ApJ...794..107Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/794/107CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/128/2815 : ARAUCARIA project: NGC 6822 Cepheid variablesJ/A+A/431/1189 : BV photometry of NGC 6822 variables (Baldacci+, 2005)J/MNRAS/421/2998 : NGC 6822 Cepheids JHKs light curves (Feast+, 2012)J/A+A/572/A26 : HST photometry in NGC 6822 (Fusco+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/794/107https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/794/107http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/794/107https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/794/107https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/794/107http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/794/107GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/794/107/sample (List of studied stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/794/107/sample?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/794/107/sample?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/794/107/sample?GETtext/xml+votable180.050000true296.258-14.79230560.0055555555555555566/29716 29718https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/794/107?format=asciiInfrareddefaultJ/ApJ/794/107/table1New Spitzer & FourStar PhotometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCepheid identifier ([PGU2004] cepNNN in Simbad)meta.id;meta.maincharBandSpitzer/IRAC, FourStar pass bandinstr.bandpasscharmagObserved magnitude in Bandmagphot.magfloate_magThe 1{sigma} uncertainty in magmagstat.error;phot.magfloatMJDModified Julian Date of observationdtime.epochfloatJ/ApJ/794/107/sampleList of studied starsLCLight curvesmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCepheid identifier ([PGU2004] cepNNN in Simbad)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainPerPeriod (from table 2 of the paper)dtime.perioddoubleSimbadSimbad column added by the CDSmeta.ref.urlchar