J/ApJ/598/597ivo://CDS.VizieR/J/ApJ/598/597doi:10.26093/cds/vizier.15980597CDSAlcock C.Alves D.R.Becker A.Bennett D.Cook K.H.Drake A.,Freeman K.Geha M.Griest K.Kovacs G.Lehner M.Marshall S.,Minniti D.Nelson C.Peterson B.Popowski P.Pratt M.Quinn P.,Rodgers A.Stubbs C.Sutherland W.Vandehei T.,Welch D.L. (the Macho Collaboration)2005-04-30T15:19:38Z2005-04-30T15:19:11ZCDS support team

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

cds-question@unistra.frglobular-star-clustersvariable-starsWe have frequency-analyzed 6391 variables classified earlier as fundamental-mode RR Lyrae (RR0) stars in the MACHO database on the Large Magellanic Cloud (LMC). The overwhelming majority (i.e., 96%) of these variables have been proved to be indeed RR0 stars, whereas the remaining ones have fallen into one of the following categories: single- and double-mode Cepheids, binaries, first-overtone and double-mode RR Lyrae stars, and nonclassified variables. Special attention has been paid to the properties of the amplitude- and phase-modulated RR0 stars (the Blazhko stars). We found altogether 731 Blazhko variables showing either a doublet or an equidistant triplet pattern at the main pulsation component in their frequency spectra. This sample overwhelmingly exceeds the number of Blazhko stars known in all other systems combined. The incidence rate of the Blazhko variables among the RR0 stars in the LMC is 11.9%, which is 3 times higher than their rate among the first-overtone RR Lyrae stars. No difference is found in the average brightness between the single-mode and Blazhko variables. However, the latter ones show a somewhat lower degree of skewness in their average light curves and a concomitant lower total amplitude in their modulation-free light curves.2003ApJ...598..597Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/598/597CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/247 : Variable Stars in the Large Magellanic Clouds (MACHO, 2001)J/ApJ/542/257 : MACHO LMC first-overtone RR Lyrae (Alcock+, 2000)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/598/597https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/598/597http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/598/597https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/598/597https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/598/597http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/598/597GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/598/597/rrLyr (All RR Lyr stars (tables 2 and 3 of paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/598/597/rrLyr?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/598/597/rrLyr?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/598/597/rrLyr?GETtext/xml+votable180.050000true75.359167-69.3666670.005555555555555556Cone search capability for table J/ApJ/598/597/table5 (Variables with multiple identification numbers)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/598/597/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/598/597/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/598/597/table5?GETtext/xml+votable180.050000true75.395833-69.0350.0055555555555555565/8263 8269 8272 8274 8280 8281 6/33047 33051 33073 33092 33094 33095 33100 33101 33102 33136https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/598/597?format=asciiOpticaldefaultJ/ApJ/598/597/rrLyrAll RR Lyr stars (tables 2 and 3 of paper)recnoRecord number assigned by the VizieR team. Should Not be used for identification.intMACHOVariable namecharprimaryNoteindicates a note in table4 or table5charRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainPerPeriod (1)ddoubleVTypeVariable type (1)charNotesAdditional remarkscharJ/ApJ/598/597/table4Fourier decompositions of the Blazhko variablesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intMACHOVariable namecharf0Fundamental frequency (1)d**-1doublefmModulation (Blazhko) frequency (1)d**-1doubleNumNumber of data pointsintVmagAverage Johnson V band magnitudemagfloatsigmaStandard deviation of the residuals (=data-fit)floata1First Fourier amplitude (1)magfloata2Second Fourier amplitude (1)magfloata3Third Fourier amplitude (1)magfloata4Fourth Fourier amplitude (1)magfloata5Fifth Fourier amplitude (1)magfloata6Sixth Fourier amplitude (1)magfloata7Seventh Fourier amplitude (1)magfloata8Eighth Fourier amplitude (1)magfloata9Ninth Fourier amplitude (1)magfloata10Tenth Fourier amplitude (1)magfloatfi1First Fourier phase (1)floatfi2Second Fourier phase (1)floatfi3Third Fourier phase (1)floatfi4Fourth Fourier phase (1)floatfi5Fifth Fourier phase (1)floatfi6Sixth Fourier phase (1)floatfi7Seventh Fourier phase (1)floatfi8Eighth Fourier phase (1)floatfi9Ninth Fourier phase (1)floatfi10Tenth Fourier phase (1)floatJ/ApJ/598/597/table5Variables with multiple identification numbersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intMACHOVariable namecharPerPeriodddoubleRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainCloseVarother name of MACHO variablechar