J/AJ/143/140ivo://CDS.VizieR/J/AJ/143/140doi:10.26093/cds/vizier.51430140CDSFruth T.Kabath P.Cabrera J.Chini R.Csizmadia Sz.Eigmuller P.,Erikson A.Kirste S.Lemke R.Murphy M.Pasternacki T.Rauer H.,Titz-Weider R.2017-11-10T11:16:09Z2013-07-17T08:42:16ZCDS support team

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

cds-question@unistra.frvariable-starseclipsing-binary-starsccd-photometryThe CoRoT (Convection, Rotation and planetary Transit) field LRa02 has been observed with the Berlin Exoplanet Search Telescope II (BEST II) during the southern summer 2007/2008. A first analysis of stellar variability led to the publication of 345 newly discovered variable stars. Now, a deeper analysis of this data set was used to optimize the variability search procedure. Several methods and parameters have been tested in order to improve the selection process compared to the widely used J index for variability ranking. This paper describes an empirical approach to treat systematic trends in photometric data based upon the analysis of variance statistics that can significantly decrease the rate of false detections. Finally, the process of reanalysis and method improvement has virtually doubled the number of variable stars compared to the first analysis by Kabath et al. (Paper I, 2009, Cat. J/A+A/506/569). A supplementary catalog of 272 previously unknown periodic variables plus 52 stars with suspected variability is presented. Improved ephemerides are given for 19 known variables in the field. In addition, the BEST II results are compared with CoRoT data and its automatic variability classification.2012AJ....143..140Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/143/140CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/corot : CoRoT observation log Release 12 (CoRoT, 2009-2013)B/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2013)B/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-2013)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)I/252 : The USNO-A2.0 Catalogue (Monet+ 1998)J/AJ/141/166 : HATNet variability survey of K and M dwarfs (Hartman+, 2011)J/AJ/142/114 : A variable star census in a Perseus field (Pasternacki+, 2011)J/A+A/506/569 : BEST-II periodic variables in CoRoT LRa02 field (Kabath+, 2009)J/AJ/137/3911 : BEST periodic variable stars in LRc2 field (Kabath+, 2009)J/AcA/58/163 : VI light curves of LMC classical Cepheids (Soszynski+, 2008)J/AJ/136/654 : BEST periodic variable stars in LRa1 field (Kabath+, 2008)J/AJ/134/1560 : BEST periodic variable stars in IR01 field (Kabath+, 2007)J/AJ/134/766 : BEST variable stars in LRc1 field (Karoff+, 2007)http://www.aavso.org/vsx/ : Variable Star Indexhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/143/140https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/143/140http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/143/140https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/143/140https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/143/140http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/143/140GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/143/140/variables (Catalog of variable stars detected in CoRoT field LRa02 after reanalysis of the data set (table3 of paper), and revised parameters for variables published in 2009 (Kabath et al., Cat. J/A+A/506/569))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/143/140/variables?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/143/140/variables?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/143/140/variables?GETtext/xml+votable180.050000true101.900417-3.8740560.0055555555555555565/5510 6/22023 22029 22034 22035 22046 22065 220682.4622242610829604e-19 3.264051565855503e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/143/140?format=asciidefaultJ/AJ/143/140/variablesCatalog of variable stars detected in CoRoT field LRa02 after reanalysis of the data set (table3 of paper), and revised parameters for variables published in 2009 (Kabath et al., Cat. J/A+A/506/569)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField name (LRa02a or LRa02b) (1)obs.fieldcharsSimbad column added by the CDSmeta.notecharT0[34.587/104.975]? Heliocentric Julian Date of minimum brightness; HJD-2454400 (6)dtime.epochfloatnullableBESTInternal BEST II identifiermeta.id;meta.mainintf_BESTFlag on BEST (c, k, s, ck or cs) (2)meta.codechar2MASS2MASS identifier (3)meta.idcharRAJ2000[6/6] Hour of Right Ascension (J2000) (4)pos.eq.ra;meta.mainDEJ2000[3/6] Degree of Declination (J2000) (4)pos.eq.dec;meta.mainRBmag[12.1/18.9] Observed magnitude (5)magphot.mag;em.opt.RfloatPer[0.07167/41]? Period (6)dtime.perioddoublenullablee_Per? Uncertainty in Perdstat.errordoublenullableAmp? Amplitude of variability (6)magsrc.varfloatnullablee_Amp? Uncertainty in Ampmagstat.errorfloatnullableJsStetson's (1996PASP..108..851S) J index of variabilitysrc.var.indexfloatTypeVariable type (from B/gcvs) (7)meta.code;src.varcharONameOther namesmeta.idcharCoRoTCross-match with B/corot within 1.5"meta.ref.urlintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar