J/AJ/121/870ivo://CDS.VizieR/J/AJ/121/870doi:10.26093/cds/vizier.51210870CDSMacri L.M.Stanek K.Z.Sasselov D.D.Krockenberger M.Kaluzny J.2022-11-02T11:01:56Z2001-05-06T23:57:18ZCDS support team

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

cds-question@unistra.frvariable-starsinfrared-photometryvisible-astronomyWide-band photometryThe DIRECT project aims to determine direct distances to two important galaxies in the cosmological distance ladder - M31 and M33 - using detached eclipsing binaries (DEBs) and Cepheids. We present the results of the first large-scale CCD-based search for variables in M33. We have observed two fields located in the central region of M33 for a total of 95 nights on the F. L. Whipple Observatory 1.2 m telescope and 36 nights on the Michigan-Dartmouth-MIT 1.3 m telescope. We have found a total of 544 variables, including 251 Cepheids and 47 eclipsing binaries. The catalog of variables is available on-line, along with finding charts and BVI light curve data (consisting of 8.2x10^4^ individual measurements). The complete set of CCD frames is available upon request.2001AJ....121..870Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/121/870CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-tohttp://cfa-www.harvard.edu/~kstanek/DIRECT/ : DIRECT Project homepageJ/AJ/121/861 : BVI photometry of central part of M33 (Macri+, 2001)J/AJ/121/2032 : Direct variables in M33A field (Mochejska+, 2001)J/A+A/366/498 : HST VI photometry of M33 star clusters (Chandar+, 2001)J/AJ/110/1649 : HST VI photometry near the M33 nucleus (Mighell+ 1995)J/AJ/110/2715 : UBV photometry in NGC 6822, M31 and M33 (Massey+ 1995)J/ApJS/99/551 : BVI photometry of massive stars in M33 and M31 (Hunter+ 1995)J/AcA/48/455 : Globular Clusters in M31 and M33 (Mochejska+, 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/121/870https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/121/870http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/121/870https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/121/870https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/121/870http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/121/870GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/121/870/table1 (DIRECT Cepheids)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/121/870/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/121/870/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/121/870/table1?GETtext/xml+votable180.050000true23.572291730.75145830.005555555555555556Cone search capability for table J/AJ/121/870/table2 (DIRECT Eclipsing Binaries)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/121/870/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/121/870/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/121/870/table2?GETtext/xml+votable180.050000true23.59230.78621940.005555555555555556Cone search capability for table J/AJ/121/870/table3 (DIRECT Periodic Variables)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/121/870/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/121/870/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/121/870/table3?GETtext/xml+votable180.050000true23.584083330.56686940.005555555555555556Cone search capability for table J/AJ/121/870/table4 (DIRECT Miscellaneous Variables)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/121/870/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/121/870/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/121/870/table4?GETtext/xml+votable180.050000true23.379583330.58400830.005555555555555556Cone search capability for table J/AJ/121/870/table9 (List of M33 classical variables (discovered between 1922 and 1983) and their DIRECT counterparts)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/121/870/table9?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/121/870/table9?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/121/870/table9?GETtext/xml+votable180.050000true23.54083330.63750.005555555555555556Cone search capability for table J/AJ/121/870/table10 (List of variables from Kinman, Mould, & Wood (1987AJ.....93..833K) with DIRECT counterparts)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/121/870/table10?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/121/870/table10?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/121/870/table10?GETtext/xml+votable180.050000true23.55166730.7781670.0055555555555555566/2154-2155 22412.367228618189496e-19 4.920466254354166e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/121/870?format=asciiOpticalInfrareddefaultJ/AJ/121/870/table1DIRECT CepheidsPerPerioddtime.periodfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintD33DIRECT Cepheid designation (G1)meta.id;meta.maincharprimaryRAJ2000Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainSimbadSimbad column added by the CDSmeta.ref.urlcharVmagMean Johnson V band magnitude from template fitmagphot.mag;em.opt.VfloatImag? Mean Cousins I band magnitude from template fitmagphot.mag;em.opt.IfloatnullableBmag? Mean Johnson B band magnitude from template fitmagphot.mag;em.opt.Bfloatnullablee_Vmagrms deviation of Vmagmagstat.error;phot.magfloate_Imag? rms deviation of Imagmagstat.error;phot.magfloatnullablee_Bmag? rms deviation of Bmagmagstat.error;phot.magfloatnullableAmpAmplitude of pulsationmagphot.magfloatPlotDisplay the lightcurve of the starmeta.ref.urlcharJ/AJ/121/870/table2DIRECT Eclipsing BinariesSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintD33DIRECT Eclipsing Binary designation (G1)meta.id;meta.maincharprimaryRAJ2000Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainPerPerioddtime.periodfloatVmagMean Johnson V band magnitudemagphot.mag;em.opt.VfloatImag? Mean Cousins I band magnitudemagphot.mag;em.opt.IfloatnullableBmag? mean Johnson B band magnitudemagphot.mag;em.opt.Bfloatnullablee_Vmagrms deviation of Vmag from template fitmagstat.error;phot.magfloate_Imag? rms deviation of Imag from template fitmagstat.error;phot.magfloatnullablee_Bmag? rms deviation of Bmag from template fitmagstat.error;phot.magfloatnullableRadPRadius of primary star relative to the binary separationphys.size.radiusfloatRadSRadius of secondary star relative to the binary separationphys.size.radiusfloatInclInclination of the orbitdegsrc.orbital.inclinationfloatEccenEccentricity of the orbitsrc.orbital.eccentricityfloatPlotDisplay the lightcurve of the starmeta.ref.urlcharJ/AJ/121/870/table3DIRECT Periodic VariablesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainPerPerioddtime.periodfloatSimbadSimbad column added by the CDSmeta.ref.urlcharVmag? Mean Johnson V band magnitudemagphot.mag;em.opt.VfloatnullableImag? Mean Cousins I band magnitudemagphot.mag;em.opt.IfloatnullableBmag? Mean Johnson B band magnitudemagphot.mag;em.opt.Bfloatnullablee_Vmag? rms deviation of Vmag from template fitmagstat.error;phot.magfloatnullablee_Imag? rms deviation of Imag from template fitmagstat.error;phot.magfloatnullablee_Bmag? rms deviation of Bmag from template fitmagstat.error;phot.magfloatnullablePlotDisplay the lightcurve of the starmeta.ref.urlcharD33DIRECT periodic variable designation (G1)meta.id;meta.maincharprimaryJ/AJ/121/870/table4DIRECT Miscellaneous VariablesSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintD33DIRECT miscellaneous variable designation (G1)meta.id;meta.maincharprimaryRAJ2000Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainJSV-band J_S_ variability index (1)meta.code;src.var.indexfloatVmagMean Johnson V band magnitudemagphot.mag;em.opt.VfloatImag? Mean Cousins I band magnitudemagphot.mag;em.opt.IfloatnullableBmag? Mean Johnson B band magnitudemagphot.mag;em.opt.Bfloatnullablee_Vmagrms deviation of Vmag from template fitmagstat.error;phot.magfloate_Imag? rms deviation of Imag from template fitmagstat.error;phot.magfloatnullablee_Bmag? rms deviation of Bmag from template fitmagstat.error;phot.magfloatnullablePlotDisplay the lightcurve of the starmeta.ref.urlcharJ/AJ/121/870/table5Photometric data - Cepheid VariablesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintD33DIRECT variable designation (G1)meta.id;meta.maincharFilt[BVI] Filter used (Johnson BV, Cousins I)instr.setup;instr.filtercharHJDJulian datedtime.epochdoubleindexedmagMagnitude of Filtmagphot.magfloate_magUncertainty in magmagstat.error;phot.magfloatJ/AJ/121/870/table6Photometric data - Eclipsing BinariesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintD33DIRECT variable designation (G1)meta.id;meta.maincharFilt[BVI] Filter used (Johnson BV, Cousins I)instr.setup;instr.filtercharHJDJulian datedtime.epochdoublemagMagnitude of Filtmagphot.magfloate_magUncertainty in magmagstat.error;phot.magfloatJ/AJ/121/870/table7Photometric data - Periodic VariablesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintD33DIRECT variable designation (G1)meta.id;meta.maincharFilt[BVI] Filter used (Johnson BV, Cousins I)instr.setup;instr.filtercharHJDJulian datedtime.epochdoublemagMagnitude of Filtmagphot.magfloate_magUncertainty in magmagstat.error;phot.magfloatJ/AJ/121/870/table8Photometric data - Miscellaneous VariablesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintD33DIRECT variable designation (G1)meta.id;meta.maincharFilt[BVI] Filter used (Johnson BV, Cousins I)instr.setup;instr.filtercharHJDJulian datedtime.epochdoubleindexedmagMagnitude of Filtmagphot.magfloate_magUncertainty in magmagstat.error;phot.magfloatJ/AJ/121/870/table9List of M33 classical variables (discovered between 1922 and 1983) and their DIRECT counterpartsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameClassical designation (1)meta.idcharD33DIRECT designation (G1) (2)meta.id;meta.maincharRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainTypeClClassical variable type (3)meta.code;src.varcharTypeDDIRECT variable type (3)meta.code;src.varcharPerCl? Classical perioddtime.periodfloatnullablePerD? DIRECT perioddtime.periodfloatnullableNoteNotes (4)meta.notecharJ/AJ/121/870/table10List of variables from Kinman, Mould, & Wood (1987AJ.....93..833K) with DIRECT counterpartsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClassObject classification (1)meta.code;src.varintKMWKMW (Kinman et al., 1987AJ.....93..833K) designation (2)meta.idcharD33DIRECT designation (G1)meta.id;meta.maincharRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainTypeDDIRECT variable type (3)meta.code;src.varcharPerKMW? KMW perioddtime.periodfloatnullablePerD? DIRECT perioddtime.periodfloatnullableNote? [1/2] Notes (4)meta.noteintnullable