J/AJ/115/1016ivo://CDS.VizieR/J/AJ/115/1016doi:10.26093/cds/vizier.51151016CDSKaluzny J.Stanek K.Z.Krockenberger M.Sasselov D.D.Tonry J.L.,Mateo M.2023-04-06T16:50:27Z1998-08-25T13:07:00ZCDS support team

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

cds-question@unistra.frvariable-starseclipsing-binary-starsphotometryWe have undertaken 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 January we obtained 36 full nights on the Michigan-Dartmouth-MIT Observatory 1.3m telescope and 45 full/partial nights on the F.L. Whipple Observatory 1.2m telescope to search for DEBs and new Cepheids in the M31 and M33 galaxies. In this paper, first in a series, we present the catalog of variable stars, most of them newly detected, found in the field M31B [({alpha},{delta})=(11.20{deg}, 41.59{deg}), J2000.0]. We have found 85 variable stars: 12 eclipsing binaries, 38 Cepheids, and 35 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: http://cfa-www.harvard.edu/~kstanek/DIRECT.1998AJ....115.1016Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/115/1016CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/126/401 : M 31 Cepheids periods (Magnier+ 1997)J/AJ/115/1894 : M31A eclipsing binaries and Cepheids (Stanek+ 1998)J/AJ/117/2810 : M31C eclipsing binaries and Cepheids (Stanek+, 1999)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)http://cfa-www.harvard.edu/~kstanek/DIRECT : DIRECT Projecthttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/115/1016https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/115/1016http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/115/1016https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/115/1016https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/115/1016http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/115/1016GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/115/1016/table1 (Direct miscellaneous variables in M31B)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/115/1016/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/115/1016/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/115/1016/table1?GETtext/xml+votable180.050000true11.093241.64750.005555555555555556Cone search capability for table J/AJ/115/1016/table2 (Direct Cepheids in M31B)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/115/1016/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/115/1016/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/115/1016/table2?GETtext/xml+votable180.050000true11.11341.5680.005555555555555556Cone search capability for table J/AJ/115/1016/table3 (Direct other periodic variables in M31B)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/115/1016/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/115/1016/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/115/1016/table3?GETtext/xml+votable180.050000true11.290941.50860.005555555555555556Cone search capability for table J/AJ/115/1016/table4 (Direct miscellaneous variables in M31B)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/115/1016/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/115/1016/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/115/1016/table4?GETtext/xml+votable180.050000true11.241741.53040.0055555555555555566/2623 2709https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/115/1016?format=asciiOpticaldefaultJ/AJ/115/1016/table1Direct miscellaneous variables in M31BrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintD31BVariable name (DIRECT VNNNN D31B in Simbad)meta.id;meta.maincharprimaryRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainJsVariability index J_S_meta.code;src.varfloatPerPerioddtime.periodfloatVmaxMaximun V magnitude of the system outside eclipsemagphot.mag;em.opt.VfloatImaxMaximun I magnitude of the system outside eclipsemagphot.mag;em.opt.I;stat.maxfloatRad1Radius of the binary first component (1)phys.size.radius;arith.ratiofloatRad2Radius of the binary second component (1)phys.size.radius;arith.ratiofloatiInclination angle of the binary orbit to the line of sightdegsrc.orbital.inclinationinteEccentricity of the orbitsrc.orbital.eccentricityfloatComComments (2)meta.notecharJ/AJ/115/1016/table2Direct Cepheids in M31BrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintD31BVariable name (DIRECT VNNNN D31B in Simbad)meta.id;meta.maincharprimaryRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainJsVariability index J_S_meta.code;src.varfloatPerPerioddtime.periodfloat<Vmag>Flux-weighted mean V magnitudemagphot.mag;em.opt.Vfloat<Imag>? Flux-weighted mean I magnitudemagphot.mag;em.opt.IfloatnullableAAmplitude of the variationsrc.var.amplitudefloatComComments (1)meta.notecharJ/AJ/115/1016/table3Direct other periodic variables in M31BrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintD31BVariable name (DIRECT VNNNN D31B in Simbad)meta.id;meta.maincharprimaryRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainJsVariability index J_S_meta.code;src.varfloatPer? Period (only in table3.dat)dtime.periodfloatnullable<Vmag>Error-weighted mean V magnitudemagphot.mag;em.opt.Vfloat<Imag>? Error-weighted mean I magnitudemagphot.mag;em.opt.Ifloatnullablee_<Vmag>rms uncertainty on <Vmag>magstat.errorfloate_<Imag>? rms uncertainty on <Imag>magstat.errorfloatnullableComCommentsmeta.notecharJ/AJ/115/1016/table4Direct miscellaneous variables in M31BComCommentsmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintD31BVariable name (DIRECT VNNNN D31B in Simbad)meta.id;meta.maincharprimaryRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainJsVariability index J_S_meta.code;src.varfloatPer? Period (only in table3.dat)dtime.periodfloatnullable<Vmag>Error-weighted mean V magnitudemagphot.mag;em.opt.Vfloat<Imag>? Error-weighted mean I magnitudemagphot.mag;em.opt.Ifloatnullablee_<Vmag>rms uncertainty on <Vmag>magstat.errorfloate_<Imag>? rms uncertainty on <Imag>magstat.errorfloatnullableJ/AJ/115/1016/table5Light curves of eclipsing binaries in M31BrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintD31BVariable name (DIRECT VNNNN D31B in Simbad)meta.id;meta.maincharprimaryBand[IV] Bandmeta.notecharHJDHeliocentric Julian datedtime.epochdoublemagMagnitudemagphot.magfloate_magrms uncertainty on magmagstat.errorfloatJ/AJ/115/1016/table6Light curves of Cepheids in M31BHJDHeliocentric Julian datedtime.epochdoubleBand[IV] Bandmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintD31BVariable name (DIRECT VNNNN D31B in Simbad)meta.id;meta.maincharprimarymagMagnitudemagphot.magfloate_magrms uncertainty on magmagstat.errorfloatJ/AJ/115/1016/table7Light curves of other periodic variables in M31BrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintD31BVariable name (DIRECT VNNNN D31B in Simbad)meta.id;meta.maincharprimaryBand[IV] Bandmeta.notecharHJDHeliocentric Julian datedtime.epochdoublemagMagnitudemagphot.magfloate_magrms uncertainty on magmagstat.errorfloatJ/AJ/115/1016/table8Light curves of miscellaneous variables in M31BrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintD31BVariable name (DIRECT VNNNN D31B in Simbad)meta.id;meta.maincharprimaryBand[IV] Bandmeta.notecharHJDHeliocentric Julian datedtime.epochdoublemagMagnitudemagphot.magfloate_magrms uncertainty on magmagstat.errorfloat