J/AJ/118/346ivo://CDS.VizieR/J/AJ/118/346doi:10.26093/cds/vizier.51180346CDSKaluzny J.Mochejska B.J.Stanek K.Z.Krockenberger M.Sasselov D.D.,Tonry J.L.Mateo M.2023-04-06T16:50:35Z2000-05-01T22:25:44ZCDS 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 paper, the fourth in the series, we present the catalog of variable stars, most of them newly detected, found in the field M31D [(RA, DE)=(11.03{deg}, 41.27{deg}), J2000.0]. We have found 71 variable stars: five eclipsing binaries, 38 Cepheids, and 28 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....118..346Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/118/346CatalogResearchIsServedByTAP 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/117/2810 : M31C eclipsing binaries and Cepheids (Stanek+, 1999)J/AJ/118/2211 : M31F eclipsing binaries and Cepheids (Mochejska+ 1999)J/AJ/122/1383 : DIRECT BVI photometry in M31 (Mochejska+, 2001)J/A+AS/126/401 : M 31 Cepheids periods (Magnier+ 1997)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/118/346https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/118/346http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/118/346https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/118/346https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/118/346http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/118/346GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/118/346/table1 (DIRECT eclipsing binaries in M31D)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/118/346/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/118/346/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/118/346/table1?GETtext/xml+votable180.050000true11.000141.30040.005555555555555556Cone search capability for table J/AJ/118/346/table2 (DIRECT Cepheids in M31D)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/118/346/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/118/346/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/118/346/table2?GETtext/xml+votable180.050000true11.117941.3130.005555555555555556Cone search capability for table J/AJ/118/346/table3 (DIRECT other periodic variables IN M31D)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/118/346/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/118/346/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/118/346/table3?GETtext/xml+votable180.050000true10.989841.29320.005555555555555556Cone search capability for table J/AJ/118/346/table4 (DIRECT miscellaneous variables in M31D)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/118/346/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/118/346/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/118/346/table4?GETtext/xml+votable180.050000true11.076841.32850.0055555555555555566/26232.367228618189496e-19 4.920466254354166e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/118/346?format=asciiOpticaldefaultJ/AJ/118/346/table1DIRECT eclipsing binaries in M31DrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintM31DVariable name (DIRECT VNNNN M31D in Simbad)meta.id;meta.maincharRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainPerPerioddtime.periodfloatVmaxMaximum Johnson V magnitudemagphot.mag;em.opt.VfloatImax? Maximum Cousins I magnitudemagphot.mag;em.opt.IfloatnullableBmaxMaximum Johnson B magnitudemagphot.mag;em.opt.BfloatR1First component radius (1)phys.size.radius;arith.ratiofloatR2Second component radius (1)phys.size.radius;arith.ratiofloatiInclination angledegsrc.orbital.inclination;pos.posAnginteEllipticitysrc.ellipticityfloatJ/AJ/118/346/table2DIRECT Cepheids in M31DrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintM31DVariable name (DIRECT VNNNN M31D 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 Johnson V magnitudemagphot.mag;em.opt.Vfloat<Imag>? Flux-weighted mean Cousins I magnitudemagphot.mag;em.opt.Ifloatnullable<Bmag>? Flux-weighted mean Johnson B magnitudemagphot.mag;em.opt.BfloatnullableAV-band amplitude of the variationmagarith.rate;phot.mag;em.opt.VfloatComComments (1)meta.notecharJ/AJ/118/346/table3DIRECT other periodic variables IN M31DComComments (1)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintM31DVariable name (DIRECT VNNNN M31D in Simbad)meta.id;meta.maincharRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainPerPerioddtime.periodfloatVmagError-weighted mean Johnson V magnitudemagphot.mag;em.opt.VfloatImag? Error-weighted mean Cousins I magnitudemagphot.mag;em.opt.IfloatnullableBmag? Error-weighted mean Johnson B magnitudemagphot.mag;em.opt.Bfloatnullablee_VmagStandard deviation in Johnson V bandmagstat.error;phot.mag;em.opt.Vfloate_Imag? Standard deviation in Cousins I bandmagstat.error;phot.mag;em.opt.Ifloatnullablee_Bmag? Standard deviation in Johnson B bandmagstat.error;phot.mag;em.opt.BfloatnullableJ/AJ/118/346/table4DIRECT miscellaneous variables in M31DrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintM31DVariable name (DIRECT VNNNN M31D in Simbad)meta.id;meta.maincharRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainVmagMean Johnson V magnitudemagphot.mag;em.opt.VfloatImag? Mean Cousins I magnitudemagphot.mag;em.opt.IfloatnullableBmag? Mean Johnson B magnitudemagphot.mag;em.opt.Bfloatnullablee_VmagStandard deviation in Johnson V bandmagstat.error;phot.mag;em.opt.Vfloate_Imag? Standard deviation in Cousins I bandmagstat.error;phot.mag;em.opt.Ifloatnullablee_Bmag? Standard deviation in Johnson B bandmagstat.error;phot.mag;em.opt.BfloatnullableComComments (1)meta.notechar