J/ApJS/213/31ivo://CDS.VizieR/J/ApJS/213/31doi:10.26093/cds/vizier.22130031CDSBenko J.M.Plachy E.Szabo R.Molnar L.Kollath Z.2018-01-05T08:55:29Z2014-10-14T12:43:59ZCDS support team

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

cds-question@unistra.frvariable-starsphotometryIn order to benefit from the four year unprecedented precision of the Kepler data, we extracted light curves from the pixel photometric data of the Kepler space telescope for 15 Blazhko RR Lyrae stars. To collect all the flux from a given target as accurately as possible, we defined tailor-made apertures for each star and quarter. In some cases, the aperture finding process yielded sub-optimal results, because some flux have been lost even if the aperture contains all available pixels around the star. This fact stresses the importance of those methods that rely on the whole light curve instead of focusing on the extrema (O-C diagrams and other amplitude independent methods). We carried out detailed Fourier analysis of the light curves and the amplitude independent O-C diagram. We found 12 (80%) multiperiodically modulated stars in our sample. This ratio is much higher than previously found. Resonant coupling between radial modes, a recent theory for explaining the Blazhko effect, allows single, multiperiodic, or even chaotic modulations. Among the stars with two modulations, we found three stars (V355 Lyr, V366 Lyr, and V450 Lyr) where one of the periods dominates in amplitude modulation, but the other period has a larger frequency modulation amplitude. The ratio between the primary and secondary modulation periods is almost always very close to the ratios of small integer numbers. It may indicate the effect of undiscovered resonances. Furthermore, we detected the excitation of the second radial overtone mode f_2_ for three stars where this feature was formerly unknown. Our data set comprises the longest continuous, most precise observations of Blazhko RR Lyrae stars ever published. These data are made publicly available and will be unrivaled for years to come.2014ApJS..213...31Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/213/31CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2013)V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)II/264 : ASAS Variable Stars in Southern hemisphere (Pojmanski+, 2002-2005)J/A+A/562/A90 : Times of maximum light of Blazhko RRab stars (Skarka, 2014)J/A+A/549/A101 : Known Galactic field Blazhko stars (Skarka, 2013)J/AJ/144/39 : RRab stars from the GEOS RR Lyr Survey (Le Borgne+, 2012)J/MNRAS/427/1517 : XY And and UZ Vir light curves (Sodor+, 2012)J/MNRAS/420/1333 : NGC 5024 RR Lyrae VI light curves (Arellano Ferro+, 2012)J/MNRAS/415/1577 : CoRoT 105288363 Blazhko modulation (Guggenberger+, 2011)J/MNRAS/411/1585 : CZ Lac multiperiodic Blazhko modulation (Sodor+, 2011)J/A+A/510/A39 : CoRoT light curves of V1127 Aql (Chadid+, 2010)J/A+A/454/257 : First overtone RR Lyrae in LMC (Nagy+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/213/31https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/213/31http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/213/31https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/213/31https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/213/31http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/213/31GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/213/31/table3 (Basic properties of the Kepler Blazhko stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/213/31/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/213/31/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/213/31/table3?GETtext/xml+votable180.050000true295.028995838.97231670.0055555555555555566/14581 14731 14735 14817 14950 14953 14955 14956 14961 14967 14971 15136 15141 15148 15156https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/213/31?format=asciiOpticaldefaultJ/ApJS/213/31/table1Rectified Kepler data for the 15 Blazhko starsZPO[-2302/1922] Zero point offset; e^-^/sct/sphot.mag;arith.zpdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKICKepler Input Catalog identifier (1)meta.id;meta.mainintprimaryNum[1/4588] Serial number (1)meta.idintBJDBarycentric Julian Date; -2454833.0dtime.epochdoubleSFlux[1192.2/351159] Flux summed up in a tailor-made aperture; e^-^/sct/sphot.countdoubleScl[0.8/1.2] Scaling factor; 1 = no scalingarith.factorfloatCFlux[1190/350500] Shifted, scaled & detrended flux; in e^-^/sct/sphot.countdoubleKpmag[-0.9/0.5] The CFlux value in Kepler magnitude scalemagphot.flux;arith.ratiodoubleJ/ApJS/213/31/table3Basic properties of the Kepler Blazhko starsNNumber of observations for this starmeta.numberintnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKICKIC number (Cat. V/133)meta.id;meta.mainintGCVSGeneral Catalog of Variable Stars identifiermeta.id;meta.tablecharPer0[0.4/0.7] Pulsation period (P_0_)dtime.perioddoubleA(f0)[0.1/0.4] Fourier amplitude of the main pulsation frequencymagsrc.var.amplitude;meta.mainfloatPerB[27/849] Primary modulation period (P_B_)dtime.perioddoublee_PerB[0.0005/59] PerB uncertaintydstat.errorfloatl_PerS[>~? ] Limit or uncertainty flag on PerSmeta.code.errorcharPerS[16/1000]? Secondary modulation period (P_S_)dtime.periodfloatnullablee_PerS[0.01/2]? PerS uncertaintydstat.errorfloatnullableFreqAdditional frequencies (1)meta.notecharRkRemarks (2)meta.notecharCatDisplay the KIC data (Cat. V/133)meta.ref.urlcharLCLight curvemeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from SIMBAD database (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD database (declination part)degpos.eq.dec;meta.main