J/MNRAS/424/2528ivo://CDS.VizieR/J/MNRAS/424/2528doi:10.26093/cds/vizier.74242528CDSSuveges M.Sesar B.Varadi M.Mowlavi N.Becker A.C.Ivezic Z.,Beck M.Nienartowicz K.Rimoldini L.Dubath P.Bartholdi P.Eyer L.2024-07-18T20:18:53Z2013-08-19T14:45:31ZCDS support team

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

cds-question@unistra.frsurveysvariable-starsvisible-astronomysloan-photometryWe propose a robust principal component analysis framework for the exploitation of multiband photometric measurements in large surveys. Period search results are improved using the time-series of the first principal component due to its optimized signal-to-noise ratio. The presence of correlated excess variations in the multivariate time-series enables the detection of weaker variability. Furthermore, the direction of the largest variance differs for certain types of variable stars. This can be used as an efficient attribute for classification. The application of the method to a subsample of Sloan Digital Sky Survey Stripe 82 data yielded 132 high-amplitude delta Scuti variables. We also found 129 new RR Lyrae variables, complementary to the catalogue of Sesar et al., extending the halo area mapped by Stripe 82 RR Lyrae stars towards the Galactic bulge. The sample also comprises 25 multiperiodic or Blazhko RR Lyrae stars.2012MNRAS.424.2528Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/424/2528CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/708/717 : Light curve templates of RR Lyrae stars (Sesar+, 2010)J/ApJ/731/17 : Variability of low-mass stars in SDSS Stripe 82 (Becker+ 2011)J/ApJS/186/233 : Variable point sources in SDSS stripe 82. (Bhatti+, 2010)J/MNRAS/424/2528 : RR Lyrae in SDSS Stripe 82 (Suveges+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/424/2528https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/424/2528http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/424/2528https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/424/2528https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/424/2528http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/424/2528GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/424/2528/table1 (RR Lyrae candidates in Stripe 82)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/424/2528/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/424/2528/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/424/2528/table1?GETtext/xml+votable180.050000true348.09833194-0.947130.005555555555555556Cone search capability for table J/MNRAS/424/2528/table2 (Best-fitting templates of Sesar et al. (2010, Cat. J/ApJ/708/717) for the new RR Lyrae candidates in Stripe 82 (except No. 4526140))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/424/2528/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/424/2528/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/424/2528/table2?GETtext/xml+votable180.050000true348.09833194-0.947130.005555555555555556Cone search capability for table J/MNRAS/424/2528/multiper (Double-mode RR Lyr, multiperiodic RR Lyrae candidates and multiperiodic HADS stars (tables 3,4,5 and 7))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/424/2528/multiper?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/424/2528/multiper?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/424/2528/multiper?GETtext/xml+votable180.050000true336.39436-0.056748890.005555555555555556Cone search capability for table J/MNRAS/424/2528/table6 (High-amplitude {delta} Scuti (HADS) candidates in Stripe 82)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/424/2528/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/424/2528/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/424/2528/table6?GETtext/xml+votable180.050000true347.48701-0.604203060.0055555555555555565/4778 7514 7525 6/0-1 12288-12290 12296 17406 17743 17747 17750 17755 17768 17770-17773 17807 17813 17817-17818 17822 17827-17828 17832 17836-17837 17858 17982 18008 18010 18014 18017 18020 18025 18063 18065 18072 18087 18089 18092 18750 18770 18772 18774-18775 18779-18780 18793 18831 18836 18839 18844 18850-18851 18858-18859 18861 18864 19029 19031 19043-19046 19049-19052 19054 19090 19094-19098 19100-19102 19105 19107-19109 19111 19117-19118 19120 19122 19457 23102 23140 23143 23147 23182 23190 23205 23208-23209 23211 23213 30013-30015 30029-30030 30033 30035-30038 30040-30041 30043-30045 30049-30051 30054-30055 30060-30062 30066 30097-30099 30105 30107-30110 30144-30146 36861-36862 49149-49150https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/424/2528?format=asciiOpticaldefaultJ/MNRAS/424/2528/table1RR Lyrae candidates in Stripe 82recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFSimbad column added by the CDSmeta.ref.urlcharTSimbad column added by the CDSmeta.ref.urlcharIDIdentification numbermeta.id;meta.mainintprimaryn_ID[*] Multiple peaks (1)meta.notecharRAJ2000[-90/90] Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-1.3/1.3] Declination (J2000)degpos.eq.dec;meta.mainTypeRR Lyrae type (table1) or DSCT (table6)meta.note;src.morph.typecharumagMean u magnitude corrected for the interstellar medium extinctionmagphot.mag;em.opt.UfloatgmagMean g magnitude corrected for the interstellar medium extinctionmagphot.mag;em.opt.BfloatrmagMean r magnitude corrected for the interstellar medium extinctionmagphot.mag;em.opt.RfloatimagMean i magnitude corrected for the interstellar medium extinctionmagphot.mag;em.opt.IfloatzmagMean z magnitude corrected for the interstellar medium extinctionmagphot.mag;em.opt.IfloatFz1Pulsation frequency determined from generalized least-squares period search on PC1 (first direction of the principal component analysis)d**-1em.freq;src.vardoubleuAmpAmplitude in u-bandmagsrc.var.amplitudefloatgAmpAmplitude in g-bandmagsrc.var.amplitudefloatrAmpAmplitude in r-bandmagsrc.var.amplitudefloatiAmpAmplitude in i-bandmagsrc.var.amplitudefloatzAmpAmplitude in z-bandmagsrc.var.amplitudefloatDR7Display the SDSS-DR7 photometric catalog within 3" (Cat. II/294)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/424/2528/table2Best-fitting templates of Sesar et al. (2010, Cat. J/ApJ/708/717) for the new RR Lyrae candidates in Stripe 82 (except No. 4526140)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFSimbad column added by the CDSmeta.ref.urlcharIDIdentification numbermeta.id;meta.mainintRAJ2000[-90/360] Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-1.3/1.3] Declination (J2000)degpos.eq.dec;meta.mainDist? Heliocentric distance for stars included in Fig. 9kpcpos.distancefloatnullable<Vmag>? Mean dereddened V-band magnitude for stars included in Fig. 9 (1)magphot.mag;em.opt.VfloatnullablePerPerioddtime.perioddoubleuAmpAmplitude in band u determined from the best-fit templatemagsrc.var.amplitudefloatn_uAmp[*] '*' indicates underestimated uAmpmeta.notecharuMJD0Epoch of maximum brightness in u band determined from the best-fit templatedtime.epochdoubleumag0u magnitude at the epoch of maximum brightness corrected for the ISM extinctionmagphot.mag;em.opt.UfloatuTempu magnitude best-fit template identifier number (3)meta.id;instr.plateintnullableuZetau magnitude goodness-of-fit statistics (4)stat.fit.goodnessfloatgAmpAmplitude in band g determined from the best-fit templatemagsrc.var.amplitudefloatn_gAmp[*] '*' indicates underestimated gAmpmeta.notechargMJD0Epoch of maximum brightness in g band determined from the best-fit templatedtime.epochdoublegmag0g magnitude at the epoch of maximum brightness corrected for the ISM extinctionmagphot.mag;em.opt.BfloatgTempg magnitude best-fit template identifier number (3)meta.id;instr.plateintnullablegZetag magnitude goodness-of-fit statistics (4)stat.fit.goodnessfloatrAmpAmplitude in band r determined from the best-fit templatemagsrc.var.amplitudefloatn_rAmp[*] '*' indicates underestimated rAmpmeta.notecharrMJD0Epoch of maximum brightness in r band determined from the best-fit templatedtime.epochdoublermag0r magnitude at the epoch of maximum brightness corrected for the ISM extinctionmagphot.mag;em.opt.RfloatrTempr magnitude best-fit template identifier number (3)meta.id;instr.plateintnullablerZetar magnitude goodness-of-fit statistics (4)stat.fit.goodnessfloatiAmpAmplitude in band i determined from the best-fit templatemagsrc.var.amplitudefloatn_iAmp[*] '*' indicates underestimated iAmpmeta.notechariMJD0Epoch of maximum brightness in i band determined from the best-fit templatedtime.epochdoubleimag0i magnitude at the epoch of maximum brightness corrected for the ISM extinctionmagphot.mag;em.opt.IfloatiTempi magnitude best-fit template identifier number (3)meta.id;instr.plateintnullableiZetai magnitude goodness-of-fit statistics (4)stat.fit.goodnessfloatzAmpAmplitude in band z determined from the best-fit templatemagsrc.var.amplitudefloatn_zAmp[*] '*' indicates underestimated zAmpmeta.notecharzMJD0Epoch of maximum brightness in z band determined from the best-fit templatedtime.epochdoublezmag0z magnitude at the epoch of maximum brightness corrected for the ISM extinctionmagphot.mag;em.opt.IfloatzTempz magnitude best-fit template identifier number (3)meta.id;instr.plateintnullablezZetaz magnitude goodness-of-fit statistics (4)stat.fit.goodnessfloatJ/MNRAS/424/2528/multiperDouble-mode RR Lyr, multiperiodic RR Lyrae candidates and multiperiodic HADS stars (tables 3,4,5 and 7)TypeVariable type (1)src.classcharFSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification numbermeta.id;meta.mainintRAJ2000[-90/90] Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-1.3/1.3] Declination (J2000)degpos.eq.dec;meta.mainumagMean u magnitude corrected for the interstellar medium extinctionmagphot.mag;em.opt.UfloatgmagMean g magnitude corrected for the interstellar medium extinctionmagphot.mag;em.opt.BfloatrmagMean r magnitude corrected for the interstellar medium extinctionmagphot.mag;em.opt.RfloatimagMean i magnitude corrected for the interstellar medium extinctionmagphot.mag;em.opt.IfloatzmagMean z magnitude corrected for the interstellar medium extinctionmagphot.mag;em.opt.IfloatFz1Pulsation frequency determined from generalized least-squares period search on PC1 (first direction of the principal component analysis)d**-1em.freq;src.vardoubleFr? Secondary frequencyd**-1em.freq;src.vardoublenullableRatio[0.6/1]? Ratio of fundamental to first-overtone frequency Fz1/Frem.freq;arith.ratiodoublenullablePr[0/1] P-value of secondary frequencystat.fit.goodnessfloatuAmpAmplitude in u-bandmagsrc.var.amplitudefloatgAmpAmplitude in g-bandmagsrc.var.amplitudefloatrAmpAmplitude in r-bandmagsrc.var.amplitudefloatiAmpAmplitude in i-bandmagsrc.var.amplitudefloatzAmpAmplitude in z-bandmagsrc.var.amplitudefloatDR7Display the SDSS-DR7 photometric catalog within 3" (Cat. II/294)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/424/2528/table6High-amplitude {delta} Scuti (HADS) candidates in Stripe 82recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFSimbad column added by the CDSmeta.ref.urlcharIDIdentification numbermeta.id;meta.mainintn_ID[*] Multiple peaks (1)meta.notecharRAJ2000[-90/90] Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-1.3/1.3] Declination (J2000)degpos.eq.dec;meta.mainTypeRR Lyrae type (table1) or DSCT (table6)meta.note;src.morph.typecharumagMean u magnitude corrected for the interstellar medium extinctionmagphot.mag;em.opt.UfloatgmagMean g magnitude corrected for the interstellar medium extinctionmagphot.mag;em.opt.BfloatrmagMean r magnitude corrected for the interstellar medium extinctionmagphot.mag;em.opt.RfloatimagMean i magnitude corrected for the interstellar medium extinctionmagphot.mag;em.opt.IfloatzmagMean z magnitude corrected for the interstellar medium extinctionmagphot.mag;em.opt.IfloatFz1Pulsation frequency determined from generalized least-squares period search on PC1 (first direction of the principal component analysis)d**-1em.freq;src.vardoubleuAmpAmplitude in u-bandmagsrc.var.amplitudefloatgAmpAmplitude in g-bandmagsrc.var.amplitudefloatrAmpAmplitude in r-bandmagsrc.var.amplitudefloatiAmpAmplitude in i-bandmagsrc.var.amplitudefloatzAmpAmplitude in z-bandmagsrc.var.amplitudefloatDR7Display the SDSS-DR7 photometric catalog within 3" (Cat. II/294)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar