J/AJ/122/2477ivo://CDS.VizieR/J/AJ/122/2477doi:10.26093/cds/vizier.51222477CDSMochejska B.J.Kaluzny J.Stanek K.Z.Sasselov D.D.Szentgyorgyi A.H.2023-04-06T16:50:45Z2006-09-13T15:50:30ZCDS support team

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

cds-question@unistra.frgalaxiesvariable-starsvisible-astronomybroad-band-photometryDIRECT is a project to obtain directly the distances to two Local Group galaxies, M31 and M33, which occupy a crucial position near the bottom of the cosmological distance ladder. As the first step of the DIRECT project we have searched for detached eclipsing binaries (DEBs) and new Cepheids in the M31 and M33 galaxies with 1m class telescopes. In this eighth paper we present a catalog of variable stars discovered in the data from the follow-up observations of DEB system D33J013337.0+303032.8 in field M33B [(RA,DE)=(23.48{deg}, 30.57{deg}), J2000.0], collected with the Kitt Peak National Observatory 2.1m telescope. In our search covering an area of 108arcmin^2^ we have found 895 variable stars: 96 eclipsing binaries, 349 Cepheids, and 450 other periodic, possibly long-period or nonperiodic variables. Of these variables 612 are newly discovered. Their light curves were extracted using the ISIS image subtraction package. For 77% of the variables we present light curves in standard V and B magnitudes, with the remaining 23% expressed in units of differential flux. We have discovered a population of first-overtone Cepheid candidates, and for six of them we present strong arguments in favor of this interpretation. The catalog of variables, as well as their photometry (about 9.2x10^4^ BV measurements) and finding charts, is available electronically via anonymous ftp and the World Wide Web. The complete set of the CCD frames is available upon request.2001AJ....122.2477Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/122/2477CatalogResearchIsServedByTAP 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/121/2032 : Direct variables in M33A field (Mochejska+, 2001)http://cfa-www.harvard.edu/~kstanek/DIRECT/ : DIRECT Homepagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/122/2477https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/122/2477http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/122/2477https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/122/2477https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/122/2477http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/122/2477GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/122/2477/table1 (DIRECT eclipsing binaries in M33B)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/122/2477/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/122/2477/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/122/2477/table1?GETtext/xml+votable180.050000true23.49791730.5596390.005555555555555556Cone search capability for table J/AJ/122/2477/table2 (DIRECT flux eclipsing binaries in M33B)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/122/2477/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/122/2477/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/122/2477/table2?GETtext/xml+votable180.050000true23.56208330.5804720.005555555555555556Cone search capability for table J/AJ/122/2477/table4 (DIRECT Cepheids in M33B)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/122/2477/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/122/2477/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/122/2477/table4?GETtext/xml+votable180.050000true23.55916730.50.005555555555555556Cone search capability for table J/AJ/122/2477/table5 (DIRECT flux Cepheids in M33B)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/122/2477/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/122/2477/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/122/2477/table5?GETtext/xml+votable180.050000true23.50541730.6521940.005555555555555556Cone search capability for table J/AJ/122/2477/table7 (DIRECT other periodic variables in M33B)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/122/2477/table7?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/122/2477/table7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/122/2477/table7?GETtext/xml+votable180.050000true23.417530.6228330.005555555555555556Cone search capability for table J/AJ/122/2477/table9 (DIRECT miscellaneous variables in M33B)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/122/2477/table9?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/122/2477/table9?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/122/2477/table9?GETtext/xml+votable180.050000true23.43791730.60550.0055555555555555566/2154-2155https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/122/2477?format=asciiOpticaldefaultJ/AJ/122/2477/table1DIRECT eclipsing binaries in M33BD33Binary name (G1)meta.id;meta.maincharprimaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPerPeriod of the systemdtime.periodfloatu_Per[:] Uncertainty flag on periodmeta.code.errorcharVmag? Maximum V band magnitude outside of eclipsemagphot.mag;em.opt.VfloatnullableBmag? Maximum B band magnitude outside of eclipsemagphot.mag;em.opt.BfloatnullableR1Estimated primary component radius in units of the orbital separationphys.size.radius;arith.ratiofloatR2Estimated secondary component radius in units of the orbital separationphys.size.radius;arith.ratiofloatIncEstimated inclination angle of the orbitdegsrc.orbital.inclinationfloatEccenEstimated eccentricity of the orbitsrc.orbital.eccentricityfloatCom[1]? Comments (2)meta.noteintnullableLCurvedraw the light curvemeta.ref.urlchar_RASimbad column added by the CDSdegpos.eq.ra;meta.main_DESimbad column added by the CDSdegpos.eq.dec;meta.mainJ/AJ/122/2477/table2DIRECT flux eclipsing binaries in M33BrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintD33Object name (G1)meta.id;meta.maincharprimaryPerPeriod of the systemdtime.periodfloatu_Per[:] Uncertainty flag on periodmeta.code.errorcharCom[1-2]? Comments (2)meta.noteintnullableLCurvedraw the light curvemeta.ref.urlchar_RASimbad column added by the CDSdegpos.eq.ra;meta.main_DESimbad column added by the CDSdegpos.eq.dec;meta.mainJ/AJ/122/2477/table4DIRECT Cepheids in M33BD33Binary name (G1)meta.id;meta.maincharprimaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPerPeriod of the systemdtime.periodfloatu_Per[:] Uncertainty flag on periodmeta.code.errorcharVmag? The V band magnitude (2)magphot.mag;em.opt.VfloatnullableBmag? The B band magnitude (2)magphot.mag;em.opt.BfloatnullableVamp? The V band amplitudemagarith.rate;src.var.amplitude;em.opt.VfloatnullableBamp? The B band amplitudemagarith.rate;src.var.amplitude;em.opt.BfloatnullableCom[12 EB] Comments (3)meta.notecharLCurvedraw the light curvemeta.ref.urlchar_RASimbad column added by the CDSdegpos.eq.ra;meta.main_DESimbad column added by the CDSdegpos.eq.dec;meta.mainJ/AJ/122/2477/table5DIRECT flux Cepheids in M33BrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintD33Object name (G1)meta.id;meta.maincharprimaryPerPeriod of the systemdtime.periodfloatu_Per[:] Uncertainty flag on periodmeta.code.errorcharCom[1-2]? Comments (2)meta.noteintnullableLCurvedraw the light curvemeta.ref.urlchar_RASimbad column added by the CDSdegpos.eq.ra;meta.main_DESimbad column added by the CDSdegpos.eq.dec;meta.mainJ/AJ/122/2477/table7DIRECT other periodic variables in M33BrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintD33Binary name (G1)meta.id;meta.maincharprimaryPerPeriod of the systemdtime.periodfloatu_Per[:] Uncertainty flag on periodmeta.code.errorcharVmag? The V band magnitude (2)magphot.mag;em.opt.VfloatnullableBmag? The B band magnitude (2)magphot.mag;em.opt.BfloatnullableVamp? The V band amplitudemagarith.rate;src.var.amplitude;em.opt.VfloatnullableBamp? The B band amplitudemagarith.rate;src.var.amplitude;em.opt.BfloatnullableCom[12 EB] Comments (3)meta.notecharLCurvedraw the light curvemeta.ref.urlchar_RASimbad column added by the CDSdegpos.eq.ra;meta.main_DESimbad column added by the CDSdegpos.eq.dec;meta.mainJ/AJ/122/2477/table9DIRECT miscellaneous variables in M33BrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintD33Variable name (G1)meta.id;meta.maincharprimaryVmag? The average V band magnitudemagphot.mag;em.opt.VfloatnullableBmag? The average B band magnitudemagphot.mag;em.opt.BfloatnullableVamp? The V band amplitudemagarith.rate;src.var.amplitude;em.opt.VfloatnullableBamp? The B band amplitudemagarith.rate;src.var.amplitude;em.opt.BfloatnullableCom[12 LP] Comment (1)meta.notecharLCurvedraw the light curvemeta.ref.urlchar_RASimbad column added by the CDSdegpos.eq.ra;meta.main_DESimbad column added by the CDSdegpos.eq.dec;meta.mainJ/AJ/122/2477/lcLight curvesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintD33Object name (G1)meta.id;meta.maincharindexedFtr[BVbv] Filter passband (1)meta.code;instr.filtercharHJDJulian date of observationdtime.epochdoubleDataObserved magnitude or differential flux (1)phot.magdoublee_DataUncertainty in Datastat.errorfloat