J/AJ/117/2810ivo://CDS.VizieR/J/AJ/117/2810doi:10.26093/cds/vizier.51172810CDSStanek K.Z.Kaluzny J.Krockenberger M.Sasselov D.D.Tonry J.L.,Mateo M.2023-04-06T16:50:33Z2000-10-14T16:10:21ZCDS support team

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

cds-question@unistra.frvariable-starseclipsing-binary-starsphotometryWe undertook a long-term project, DIRECT, to obtain the direct distances to two important galaxies in the cosmological distance ladder - M31 and M33 - using detached eclipsing binaries (DEBs) and Cepheids. While rare and difficult to detect, DEBs provide us with the potential to determine these distances with an accuracy better than 5%. The extensive photometry obtained in order to detect DEBs provides us with good light curves for the Cepheid variables. These are essential to the parallel project to derive direct Baade-Wesselink distances to Cepheids in M31 and M33. For both Cepheids and eclipsing binaries, the distance estimates will be free of any intermediate steps. As a first step in the DIRECT project, between 1996 September and 1997 October we obtained 95 full/partial nights on the F. L. Whipple Observatory 1.2 m telescope and 36 full nights on the Michigan-Dartmouth-MIT 1.3 m telescope to search for DEBs and new Cepheids in the M31 and M33 galaxies. In this third paper in the series, we present the catalog of variable stars, most of them newly detected, found in the field M31C [(RA, DE)=(11.10{deg}, 41.42{deg}), J2000.0]. We have found 115 variable stars: 12 eclipsing binaries, 35 Cepheids, and 68 other periodic, possible long-period or nonperiodic variables. The catalog of variables, as well as their photometry and finding charts, is available via anonymous ftp and the World Wide Web. The complete set of the CCD frames is available upon request.1999AJ....117.2810Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/117/2810CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-tohttp://cfa-www.harvard.edu/~kstanek/DIRECT : DIRECT projectJ/AJ/115/1894 : M31A eclipsing binaries and Cepheids (Stanek+ 1998)J/AJ/115/1016 : M31B eclipsing binaries and Cepheids (Kaluzny+ 1998)J/AJ/118/346 : M31D eclipsing binaries and Cepheids (Kaluzny+ 1999)J/AJ/118/2211 : M31F eclipsing binaries and Cepheids (Mochejska+ 1999)J/AJ/122/1383 : DIRECT BVI photometry in M31 (Mochejska+, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/117/2810https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/117/2810http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/117/2810https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/117/2810https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/117/2810http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/117/2810GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/117/2810/table1 (DIRECT eclipsing binaries in M31C)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/117/2810/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/117/2810/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/117/2810/table1?GETtext/xml+votable180.050000true11.150341.48880.005555555555555556Cone search capability for table J/AJ/117/2810/table2 (DIRECT Cepheids in M31C)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/117/2810/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/117/2810/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/117/2810/table2?GETtext/xml+votable180.050000true11.134641.38060.005555555555555556Cone search capability for table J/AJ/117/2810/table3 (DIRECT other periodic variables in M31C)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/117/2810/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/117/2810/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/117/2810/table3?GETtext/xml+votable180.050000true10.987741.38450.005555555555555556Cone search capability for table J/AJ/117/2810/table4 (DIRECT miscellaneous variables in M31C)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/117/2810/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/117/2810/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/117/2810/table4?GETtext/xml+votable180.050000true11.048941.45350.0055555555555555566/2623https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/117/2810?format=asciiOpticaldefaultJ/AJ/117/2810/table1DIRECT eclipsing binaries in M31CrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintM31CVariable name (DIRECT VNNNN M31C in Simbad)meta.id;meta.maincharRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainPerPerioddtime.periodfloatVmaxMaximum V magnitudemagphot.mag;em.opt.VfloatImax? Maximum I magnitudemagphot.mag;em.opt.IfloatnullableBmaxMaximum B magnitudemagphot.mag;em.opt.BfloatR1First component radius (1)phys.size.radius;arith.ratiofloatR2Second component radius (1)phys.size.radius;arith.ratiofloatiInclination angledegsrc.orbital.inclinationinteEllipticitysrc.ellipticityfloatcomIndividual Comments (2)meta.notecharJ/AJ/117/2810/table2DIRECT Cepheids in M31CrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintM31CVariable name (DIRECT VNNNN M31C in Simbad)meta.id;meta.maincharRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainPerPerioddtime.periodfloat<Vmag>Flux-weighted mean V magnitudemagphot.mag;em.opt.Vfloat<Imag>? Flux-weighted mean I magnitudemagphot.mag;em.opt.Ifloatnullable<Bmag>? Flux-weighted mean B magnitudemagphot.mag;em.opt.BfloatnullableAV-band amplitude of the variationmagsrc.var.amplitudefloatComIndividual Comments (1)meta.notecharJ/AJ/117/2810/table3DIRECT other periodic variables in M31CComCommentsmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintM31CVariable name (DIRECT VNNNN M31C in Simbad)meta.id;meta.maincharRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainPerPerioddtime.periodfloatVmagError-weighted mean V magnitudemagphot.mag;em.opt.VfloatImag? Error-weighted mean I magnitudemagphot.mag;em.opt.IfloatnullableBmag? Error-weighted mean B magnitudemagphot.mag;em.opt.Bfloatnullablee_VmagStandard deviation in V bandmagstat.errorfloate_Imag? Standard deviation in I bandmagstat.errorfloatnullablee_Bmag? Standard deviation in B bandmagstat.errorfloatnullableJ/AJ/117/2810/table4DIRECT miscellaneous variables in M31CrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintM31CVariable name (DIRECT VNNNN M31C in Simbad)meta.id;meta.maincharRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainVmagMean V magnitudemagphot.mag;em.opt.VfloatImag? Mean I magnitudemagphot.mag;em.opt.IfloatnullableBmag? Mean B magnitudemagphot.mag;em.opt.Bfloatnullablee_VmagStandard deviation in V bandmagstat.errorfloate_Imag? Standard deviation in I bandmagstat.errorfloatnullablee_Bmag? Standard deviation in B bandmagstat.errorfloatnullableComComments (1)meta.notecharJ/AJ/117/2810/table5Light curves of eclipsing binaries in M31CrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintM31CVariable name (DIRECT VNNNN M31C in Simbad)meta.id;meta.maincharBand[BVI] Bandinstr.bandpasscharHJDHeliocentric Julian datedtime.epochdoublemagMagnitude in band "Band"magphot.mag;em.IR.Kfloate_magrms uncertainty on magmagstat.errorfloatJ/AJ/117/2810/table6Light curves of Cepheids in M31Ce_magrms uncertainty on magmagstat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintM31CVariable name (DIRECT VNNNN M31C in Simbad)meta.id;meta.maincharBand[BVI] Bandinstr.bandpasscharHJDHeliocentric Julian datedtime.epochdoublemagMagnitude in band "Band"magphot.mag;em.IR.KfloatJ/AJ/117/2810/table7Light curves of other periodic variables in M31CrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintM31CVariable name (DIRECT VNNNN M31C in Simbad)meta.id;meta.maincharBand[BVI] Bandinstr.bandpasscharHJDHeliocentric Julian datedtime.epochdoublemagMagnitude in band "Band"magphot.mag;em.IR.Kfloate_magrms uncertainty on magmagstat.errorfloatJ/AJ/117/2810/table8Light curves of miscellaneous variables in M31CrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintM31CVariable name (DIRECT VNNNN M31C in Simbad)meta.id;meta.maincharBand[BVI] Bandinstr.bandpasscharHJDHeliocentric Julian datedtime.epochdoublemagMagnitude in band "Band"magphot.mag;em.IR.Kfloate_magrms uncertainty on magmagstat.errorfloat