J/AJ/140/14ivo://CDS.VizieR/J/AJ/140/14doi:10.26093/cds/vizier.51400014CDSSzczygiel D.M.Stanek K.Z.Bonanos A.Z.Pojmanski G.Pilecki B.,Prieto J.L.2018-01-04T08:21:36Z2012-07-08T16:00:13ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsvariable-starsMotivated by the detection of a recent outburst of the massive luminous blue variable LMC-R71, which reached an absolute magnitude M_V_=-9.3mag, we undertook a systematic study of the optical variability of 1268 massive stars in the Large Magellanic Cloud, using a recent catalog by Bonanos et al. (2009, Cat. J/AJ/138/1003) as the input. The ASAS All Star Catalog provided well-sampled light curves of these bright stars spanning 10 years. Combining the two catalogs resulted in 599 matches, on which we performed a variability search. We identified 117 variable stars, 38 of which were not known before, despite their brightness and large amplitude of variation. We found 13 periodic stars that we classify as eclipsing binary (EB) stars, 8 of which are newly discovered bright massive EBs composed of OB-type stars. The remaining 104 variables are either semi- or non-periodic, the majority (85) being red supergiants (RSGs). Most (26) of the newly discovered variables in this category are also RSGs with only three B and four O stars.2010AJ....140...14Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/140/14CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/264 : ASAS Variable Stars in Southern hemisphere (Pojmanski+ 2002-05)J/AJ/138/1003 : IR photometry of massive LMC stars (Bonanos+, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/140/14https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/140/14http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/140/14https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/140/14https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/140/14http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/140/14GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/140/14/table3 (Parameters of 117 variable stars identified in this Study)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/140/14/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/140/14/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/140/14/table3?GETtext/xml+votable180.050000true71.4227525-67.570526110.0055555555555555566/33052 33054 33073 33076 33078 33079 33091 33094 33095 33096 33097 33098 33100 33101 33102 33106 33112 33115 33120 33123 33124 33126 33127 33128https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/140/14?format=asciiOpticaldefaultJ/AJ/140/14/table3Parameters of 117 variable stars identified in this StudySimbadNameSimbad column added by the CDSmeta.idcharImag? Mean ASAS I band magnitudemagphot.mag;em.opt.IfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar designation (1)meta.id;meta.maincharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainVmagMean ASAS V band magnitudemagphot.mag;em.opt.VfloatVampAmplitude in V bandmagphot.mag;em.opt.VfloatIamp? Amplitude in I bandmagphot.mag;em.opt.IfloatnullableSpTypeMK spectral typesrc.spTypecharE(V-I)? Mean E(V-I) extinction (2)magphot.color.excessfloatnullableGCVSGCVS LMC designationmeta.idcharNotesNeighbor notes (3)meta.notechar