J/ApJ/542/257ivo://CDS.VizieR/J/ApJ/542/257doi:10.26093/cds/vizier.15420257CDSAlcock C.Allsman R.Alves D.R.Axelrod T.Becker A.Bennett D.,Clement C.Cook K.H.Drake A.Freeman K.Geha M.Griest K.Kovacs G.,Kurtz D.W.Lehner M.Marshall S.Minniti D.Nelson C.Peterson B.,Popowski P.Pratt M.Quinn P.Rodgers A.Rowe J.Stubbs C.,Sutherland W.Tomaney A.Vandehei T.Welch D.L.2001-01-05T11:32:06Z2001-01-05T12:31:56ZCDS support team

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

cds-question@unistra.frglobular-star-clustersmagellanic-cloudsvariable-starsMore than 1300 variables classified provisionally as first-overtone RR Lyrae pulsators in the MACHO variable-star database of the Large Magellanic Cloud (LMC) have been subjected to standard frequency analysis. Based on the remnant power in the prewhitened spectra, we found 70% of the total population to be monoperiodic. The remaining 30% (411 stars) are classified as one of nine types according to their frequency spectra. Several types of RR Lyrae pulsational behavior are clearly identified here for the first time. Together with the earlier discovered double-mode (fundamental and first-overtone) variables, this study increased the number of known double-mode stars in the LMC to 181. During the total 6.5yr time span of the data, 10% of the stars showed strong period changes.2000ApJ...542..257Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/542/257CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/114/326 : MACHO Variables V. (Alcock+ 1997)J/A+A/363/L1 : The distance modulus of the LMC (Kovacs, 2000)J/ApJ/598/597 : MACHO LMC fundamental-mode RR Lyrae (Alcock+, 2003)J/AJ/127/334 : MACHO LMC first-overtone RR Lyrae variables (Alcock+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/542/257https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/542/257http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/542/257https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/542/257https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/542/257http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/542/257GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/542/257/table1 (Previously Unknown RR01 Variables of the MACHO RR1 Sample (1))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/542/257/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/542/257/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/542/257/table1?GETtext/xml+votable180.050000true81.1625-69.3408330.005555555555555556Cone search capability for table J/ApJ/542/257/table2 (RR1-{nu}1 Variables of the MACHO RR1 Sample (1))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/542/257/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/542/257/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/542/257/table2?GETtext/xml+votable180.050000true74.187917-68.3613890.005555555555555556Cone search capability for table J/ApJ/542/257/table3 (RR1-BL Variables of the MACHO RR1 Sample (1))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/542/257/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/542/257/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/542/257/table3?GETtext/xml+votable180.050000true83.662917-69.8591670.005555555555555556Cone search capability for table J/ApJ/542/257/table4 (RR1-PC Variables of the MACHO RR1 Sample (1))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/542/257/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/542/257/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/542/257/table4?GETtext/xml+votable180.050000true74.035417-69.2030560.005555555555555556Cone search capability for table J/ApJ/542/257/table5 (Miscellaneous Variables of the MACHO RR1 Sample (1))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/542/257/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/542/257/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/542/257/table5?GETtext/xml+votable180.050000true76.764583-70.0683330.0055555555555555565/8263 8272 8274 6/33047 33076 33077 33079 33092 33094 33100 33102 33120 33121 33122https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/542/257?format=asciiOpticaldefaultJ/ApJ/542/257/table1Previously Unknown RR01 Variables of the MACHO RR1 Sample (1)MACHOMACHO designation (FFF.NNNNN.NNNN)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainP1Fundamental mode perioddtime.perioddoubleP1/P0Period ratio (fundamental to first-overtone)time.periodfloatA1Fundamental mode amplitude (in MACHO r magnitudemagsrc.var.amplitudefloatA0/A1Amplitude ratio (fundamental to first-overtone)phot.mag;arith.ratiofloatJ/ApJ/542/257/table2RR1-{nu}1 Variables of the MACHO RR1 Sample (1)n_MACHOIndividual notes (1)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMACHOMACHO designation (FFF.NNNNN.NNNN)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainnu0Frequency of the main componentd**-1em.freqdoubleA0Amplitude of the main component (in MACHO r magnitude)magsrc.var.amplitudefloatnu1-nu0Frequency separationd**-1em.freqdoubleA0/A1Ratio of the secondary and main amplitudesphot.mag;arith.ratiofloatJ/ApJ/542/257/table3RR1-BL Variables of the MACHO RR1 Sample (1)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMACHOMACHO designation (FFF.NNNNN.NNNN)meta.id;meta.maincharn_MACHO[a] a: b data are usedmeta.notecharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainf0Frequency of the highest peak in the frequency spectrumd**-1em.freqdoubleA0Amplitude of the highest peak in the frequency spectrum (in MACHO r magnitude)magsrc.var.amplitudefloatDeltaf-Smaller frequency component (1)stat.fit.paramdoubleDeltaf+Higher frequency component (1) main component (1)stat.fit.paramdoubleA-/A0Ratio of the smaller amplitude to that of the main componentphot.mag;arith.ratiofloatA+/A0Ratio of the higher amplitude to that of the main componentphot.mag;arith.ratiofloatJ/ApJ/542/257/table4RR1-PC Variables of the MACHO RR1 Sample (1)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMACHOMACHO designation (FFF.NNNNN.NNNN)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainP1Perioddtime.perioddoubleJ/ApJ/542/257/table5Miscellaneous Variables of the MACHO RR1 Sample (1)P1Perioddtime.perioddoubleTypeRR typemeta.code;src.varcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMACHOMACHO designation (FFF.NNNNN.NNNN)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.main