J/ApJS/193/26ivo://CDS.VizieR/J/ApJS/193/26doi:10.26093/cds/vizier.21930026CDSPellerin A.Macri L.M.2017-07-04T07:08:27Z2011-05-25T07:18:44ZCDS support team

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

cds-question@unistra.frinfrared-photometryvisible-astronomybroad-band-photometryvariable-starsgalaxiesWe have conducted a ground-based BVI synoptic survey of the Local Group galaxy M33 which covers most of its disk and spans a period of 7 years. The survey targets luminous, long-period variables such as Cepheids and Miras and combines images from the DIRECT project and follow-up observations at the WIYN 3.5m telescope. This paper, the first in a series, presents the discovery and characterization of 564 Cepheid variables, which represent a factor of two increase over previous samples with calibrated point-spread function (PSF) photometry. We also describe the details of the observations and analysis of the survey data, including the use of archival Hubble Space Telescope images to characterize biases in our ground-based PSF photometry.2011ApJS..193...26Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/193/26CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/121/861 : BVI photometry of central part of M33 (Macri+, 2001)J/AJ/121/870 : BVI photometry of Variables in M33 (Macri+, 2001)J/AJ/122/1383 : DIRECT BVI photometry in M31 (Mochejska+, 2001)J/AJ/122/2477 : DIRECT variables in M33B field (Mochejska+, 2001)J/AJ/121/2032 : Direct variables in M33A field (Mochejska+, 2001)http://www.astronomy.ohio-state.edu/~kstanek/CfA/DIRECT/ : DIRECT projecthttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/193/26https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/193/26http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/193/26https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/193/26https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/193/26http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/193/26GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/193/26/M33cep (Cepheids in M33 })https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/193/26/M33cep?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/193/26/M33cep?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/193/26/M33cep?GETtext/xml+votable180.050000true23.6065431.008120.0055555555555555566/2154 2155 2240 22412.0730099180802698e-19 5.1769812856295e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/193/26?format=asciiOpticalInfrareddefaultJ/ApJS/193/26/M33cepCepheids in M33 }recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_NameSimbad column added by the CDSsrc.classcharNameCepheid identification (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharPerVariability Perioddsrc.varfloatVmag? Mean magnitude in the WIYN/V band (1)magphot.mag;em.opt.Vfloatnullablee_Vmag? Photometric error on Vmag (1)magstat.error;phot.mag;em.opt.VfloatnullableImag? Mean magnitude in the WIYN/I band (1)magphot.mag;em.opt.Ifloatnullablee_Imag? Photometric error on Imag (1)magstat.error;phot.mag;em.opt.IfloatnullableBmag? Mean magnitude in the WIYN/B band (1)magphot.mag;em.opt.Bfloatnullablee_Bmag? Photometric error on Bmag (1)magstat.error;phot.mag;em.opt.BfloatnullableVamp? V band amplitude of photometric variationmagarith.rate;src.var.amplitude;em.opt.VfloatnullableIamp? I band amplitude of photometric variationmagarith.rate;src.var.amplitude;em.opt.IfloatnullableBamp? B band amplitude of photometric variationmagarith.rate;src.var.amplitude;em.opt.BfloatnullableVcrw? V band crowding effect; statisticalmagphot.mag;arith.difffloatnullableIcrw? I band crowding effect; statisticalmagphot.mag;arith.difffloatnullableBcrw? B band crowding effect; statisticalmagphot.mag;arith.difffloatnullableSetDataset on which the photometric values are based (2)meta.idcharRAJ2000Right Ascention in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainJ/ApJS/193/26/table1WIYN observation logrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObs.DateDate of the observationtime.epochnullableMJDModified Julian Date of observationdtime.epochdoubleFieldWIYN fieldmeta.id;obs.fieldcharBand[BVI] Bandinstr.bandpasschartexpExposure Timestime.duration;obs.exposureintSeeingSeeingarcsecinstr.obsty.seeingfloat