J/ApJ/743/76ivo://CDS.VizieR/J/ApJ/743/76doi:10.26093/cds/vizier.17430076CDSScowcroft V.Freedman W.L.Madore B.F.Monson A.J.Persson S.E.,Seibert M.Rigby J.R.Sturch L.2017-09-22T16:16:11Z2013-06-13T13:11:37ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsvariable-starsinfrared-photometryThe Carnegie Hubble Program is designed to improve the extragalactic distance scale using data from the post-cryogenic era of Spitzer. The ultimate goal is a determination of the Hubble constant to an accuracy of 2%. This paper is the first in a series on the Cepheid population of the Large Magellanic Cloud, and focusses on the period-luminosity (PL) relations (Leavitt laws) that will be used, in conjunction with observations of Milky Way Cepheids, to set the slope and zero point of the Cepheid distance scale in the mid-infrared. To this end, we have obtained uniformly sampled light curves for 85 LMC Cepheids, having periods between 6 and 140 days. PL and period-color relations are presented in the 3.6um and 4.5um bands. We demonstrate that the 3.6um band is a superb distance indicator. The cyclical variation of the [3.6]-[4.5] color has been measured for the first time. We attribute the amplitude and phase of the color curves to the dissociation and recombination of CO molecules in the Cepheid's atmosphere. The CO affects only the 4.5um flux making it a potential metallicity indicator.2011ApJ...743...76Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/743/76CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/730/119 : HST observations of Cepheids in SN Ia hosts (Riess+, 2011)J/MNRAS/397/933 : LMC type II Cepheids JHKs magnitudes (Matsunaga+, 2009)J/AcA/58/163 : VI light curves of LMC classical Cepheids (Soszynski+, 2008)J/ApJ/679/71 : Mid-IR period-luminosity relations (Freedman+, 2008)J/A+A/415/521 : BVRIJK and velocities for MC Cepheids (Storm+, 2004)J/AJ/128/2239 : JHKs photometry of 92 LMC Cepheids (Persson+, 2004)J/ApJS/142/71 : BVRI observations of LMC Cepheids (Sebo+, 2002)J/AcA/49/223 : BVI photometry of OGLE LMC Cepheids (Udalski+, 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/743/76https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/743/76http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/743/76https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/743/76https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/743/76http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/743/76GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/743/76/table1 (Magnitudes for LMC Cepheids)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/743/76/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/743/76/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/743/76/table1?GETtext/xml+votable180.050000true73.7762083-67.47583330.0055555555555555565/8275 8280 6/33051 33052 33053 33054 33073 33075 33076 33077 33078 33084 33088 33091 33092 33094 33095 33098 33099 33106 33107 33108 33110 33112 33113 33124 33126 33127 331443.9193497546148093e-20 6.185923063528282e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/743/76?format=asciiInfrareddefaultJ/ApJ/743/76/table1Magnitudes for LMC CepheidsSimbadNameSimbad column added by the CDSmeta.idcharLClight curvesmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCepheid name (HVNNNNN or P71_U01)meta.id;meta.maincharprimaryPeriodFinal adopted perioddtime.periodfloat[3.6]Spitzer/IRAC 3.6 micron band magnitude (1)magphot.mag;em.IR.3-4umfloate_[3.6]The 1{sigma} error in [3.6] (2)magstat.errorfloat[4.5]Spitzer/IRAC 4.5 micron band magnitude (1)magphot.mag;em.IR.4-8umfloate_[4.5]The 1{sigma} error in [4.5] (2)magstat.errorfloatColorThe (3.6-4.5) band color index (1)magphot.color;em.IR;em.IRfloate_ColorThe 1{sigma} error in Color (2)magstat.error;phot.colorfloat_RAPositions from SIMBAD database (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD database (declination part)degpos.eq.dec;meta.mainJ/ApJ/743/76/table2Photometry of sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCepheid namemeta.id;meta.maincharMJDModified Julian Date; JD-2400000.5dtime.epochdouble[3.6]Spitzer/IRAC 3.6 micron band magnitude (1)magphot.mag;em.IR.3-4umfloate_[3.6]The 1{sigma} error in [3.6]magstat.errorfloat[4.5]Spitzer/IRAC 4.5 micron band magnitude (1)magphot.mag;em.IR.4-8umfloate_[4.5]The 1{sigma} error in [4.5]magstat.errorfloat