J/A+A/476/307ivo://CDS.VizieR/J/A+A/476/307doi:10.26093/cds/vizier.34760307CDSLe Borgne J.F.Paschke A.Vandenbroere J.Poretti E.Klotz A.,Boeer M.Damerdji Y.Martignoni M.Acerbi F.2017-07-04T07:07:54Z2008-06-06T16:15:31ZCDS support team

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

cds-question@unistra.frvariable-starsThe theory of stellar evolution can be more closely tested if we have the opportunity to measure new quantities. Nowadays, observations of galactic RR Lyr stars are available on a time baseline exceeding 100 years. Therefore, we can exploit the possibility of investigating period changes, continuing the pioneering work started by V.P. Tsesevich in 1969. We collected the available times of maximum brightness of the galactic RR Lyr stars in the GEOS RR Lyr database (http://dbrr.ast.obs-mip.fr/). Moreover, we also started new observational projects, including surveys with automated telescopes, to characterise the O-C diagrams better. The database we built has proved to be a very powerful tool for tracing the period variations through the ages. We analyzed 123 stars showing a clear O-C pattern (constant, parabolic or erratic) by means of different least-squares methods.2007A&A...476..307Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/476/307CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/250 : Combined General Catalogue of Variable Stars (Samus+ 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/476/307https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/476/307http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/476/307https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/476/307https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/476/307http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/476/307GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/476/307/table3 (Refined linear elements for stars showing a constant period)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/476/307/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/476/307/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/476/307/table3?GETtext/xml+votable180.050000true355.628468143.014350.005555555555555556Cone search capability for table J/A+A/476/307/pdot (Parabolic elements for RRab stars showing a well-defined period change)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/476/307/pdot?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/476/307/pdot?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/476/307/pdot?GETtext/xml+votable180.050000true19.364226938.95056280.0055555555555555566/110 1294 1663 2629 2703 3329 4037 4152 4165 4194 4286 4338 4479 4762 4833 4942 5182 6567 6744 7174 7518 8466 8519 8612 9027 9138 9172 9509 10524 10541 10584 10661 10802 11492 12536 12696 12743 12773 13171 13205 13332 13618 13680 13803 14034 14857 14994 14996 16867 16923 17158 17328 18080 18151 18177 18578 18633 18964 19104 19169 20020 20097 20303 21127 21533 22338 22462 22842 25199 25768 25799 26131 26281 26435 26515 26894 27824 27833 27998 28143 28383 30055 31054 31390 31415 31743 31772 31781 31800 32052 32254 32354 32636 32663 32713 34285 36704 36781 40998 44498 48911https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/476/307?format=asciiOpticaldefaultJ/A+A/476/307/table3Refined linear elements for stars showing a constant periodStarStar namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNmNumber of maxima observedmeta.numberintObsNumber of years for the covered periodyrtime.intervalintDate1Time coverageyrtime.epochintDate2Time coverageyrtime.epochintT0Epoch in Heliocentric Julian datedtime.epochdoublee_T0rms uncertainty on Epochdstat.errorfloatPerPerioddtime.perioddoublee_Perrms uncertainty on Per1e-08dstat.errorintsdStandard deviation for Epochdstat.stdevfloatn_sd[B] B for stars having a known Blazhko effectmeta.notecharSimbadSimbad column added by the CDSchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/A+A/476/307/pdotParabolic elements for RRab stars showing a well-defined period changeDate2Time coverageyrtime.epochintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar namemeta.id;meta.maincharNmNumber of maxima observedmeta.numberintObsNumber of years for the covered periodyrtime.intervalintDate1Time coverageyrtime.epochintT0Epoch in Heliocentric Julian datedtime.epochdoublee_T0rms uncertainty on Epochdstat.errorfloatPerPerioddtime.perioddoublee_Perrms uncertainty on Per1e-08dstat.errorinta3Quadratic term (1)1e-10dstat.fit.paramfloate_a3rms uncertainty on a31e-10dstat.errorfloatsdStandard deviation for Epochdstat.stdevfloatn_sd[B] B for stars having a known Blazhko effectmeta.notechardP/dtPeriod derivativemeta.notefloate_dP/dtrms uncertainty on dP/dtstat.errorfloatbeta{beta} parameter ({beta}=0.0732x10^10^a3/<Per>)d/Myrstat.fit.paramfloate_betarms uncertainty on betad/Myrstat.errorfloatalpha{alpha} parameter ({alpha}={beta}/<Per>)stat.fit.paramfloate_alpharms uncertainty on alphastat.error;pos.eq.rafloatSimbadSimbad column added by the CDSchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main