J/MNRAS/442/2620ivo://CDS.VizieR/J/MNRAS/442/2620doi:10.26093/cds/vizier.74422620CDSZhang L.-Y.Pi Q.-F.Yang Y.-G.2024-08-09T20:15:28Z2015-06-19T16:06:36ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsinfrared-photometryvisible-astronomyphotometryWe report 15 new VRI light curves of five low-mass eclipsing binaries (NSVS 02502726, NSVS 07453183, NSVS 11868841, NSVS 06550671 and NSVS 10653195) that were observed between 2010 and 2012. We analysed our new data together with three published spectroscopic observations and seven published light curves using a modified version of the Wilson-Devinney program. Orbital solutions of the five low-mass eclipsing binaries were revised and new star-spot parameters were obtained. We found that spot locations on the five low-mass eclipsing binaries changed over several years. However, the star-spots for NSVS 07453183 and NSVS 06550671 were stable for several months. More interestingly, for NSVS 02502726, the spots within a star-spot longitude region of 180{deg}-360{deg} indicated a magnetic activity cycle of 5.9(+/-0.2)yr. Moreover, we detected the first flare-like event on NSVS 07453183 at phase 0.39. The observations of the chromospheric activity indicators (H{beta} and H{gamma} lines) revealed that NSVS 10653195 and NSVS 06550671 were active. For NSVS 02502726, we found a weak continuous secular decrease at a smaller rate of dp/dt=-2.1(0.8)x10^-7^d/yr than the previous result. For NSVS 07453183, the O-C times appeared to increase at cycle 6000, and this was followed by a decrease at cycle 6500.2014MNRAS.442.2620Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/442/2620CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/684/635 : New low-mass eclipsing binary from SDSS-II (Blake+, 2008)J/MNRAS/401/1141 : NSVS 06507557 VRI differential photometry (Cakirli+, 2010)J/A+A/526/A29 : ASAS low-mass eclipsing binaries (Helminiak+, 2011)J/AJ/141/78 : Low-mass eclipsing binaries in KIC (Coughlin+, 2011)J/AJ/145/16 : Differential BVRI light curves of NSVS 02502726 (Lee+, 2013)J/AJ/146/35 : BVR light curves of DZ Psc (Yang+, 2013)J/AJ/149/48 : BVRI light curves of ZZ Eri (Samec+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/442/2620https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/442/2620http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/442/2620https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/442/2620https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/442/2620http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/442/2620GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/442/2620/table6 (Calculated periods and epochs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/442/2620/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/442/2620/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/442/2620/table6?GETtext/xml+votable180.050000true131.045958354.39652780.0055555555555555566/2311 5079 7321 20074 31676https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/442/2620?format=asciiOpticalInfrareddefaultJ/MNRAS/442/2620/table6Calculated periods and epochsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNSVSNSVS star numbermeta.id;meta.mainintprimaryRAJ2000Simbad right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Simbad declination (J2000)pos.eq.dec;meta.mainT0Epoch (HJD)dtime.epochdoublee_T0[0.0001/0.0014] Error on T0dstat.errorfloatPer[0.19/0.61] Perioddtime.perioddoublee_Per[7e-08/2e-07] Error on Perdstat.errordoubleLCShow the light curvesmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/442/2620/table3VRI photometric observations of the five low mass eclipsing binaries in 2010-2012recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNSVSNSVS star numbermeta.id;meta.mainintHJD-V? Heliocentric Julian Date of V band observationdtime.epochdoublenullabledVmag? Differential V band magnitudemagphot.mag;em.opt.V;arith.difffloatnullableHJD-R? Heliocentric Julian Date of R band observationdtime.epochdoublenullabledRmag? Differential R band magnitudemagphot.mag;em.opt.R;arith.difffloatnullableHJD-I? Heliocentric Julian Date of I band observationdtime.epochdoublenullabledImag? Differential I band magnitudemagphot.mag;em.opt.I;arith.difffloatnullableJ/MNRAS/442/2620/table4New minimum times of the five low-mass eclipsing binariese_HJDV? Error on HJDVdstat.errorfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNSVSNSVS star numbermeta.id;meta.mainintHJDV? Time of minima in V band (HJD-2450000)dtime.epochdoublenullableHJDR? Time of minima in R band (HJD-2450000)dtime.epochdoublenullablee_HJDR? Error on HJDRdstat.errorfloatnullableHJDI? Time of minima in I band (HJD-2450000)dtime.epochdoublenullablee_HJDI? Error on HJDIdstat.errorfloatnullableHJD? Mean on VRI time of minima (HJD-2450000)dtime.epochdoublenullablee_HJD? Error on HJDdstat.error;time.epochfloatnullableType[1/2] Type of minima (1 = primary, 2 = secondary)meta.codeintJ/MNRAS/442/2620/table5All compiled light minimum times of the low-mass eclipsing binariesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNSVSNSVS star numbermeta.id;meta.mainintHJDHeliocentric Julian Date of minima timedtime.epochdoublee_HJD? Error on HJDdstat.error;time.epochdoublenullableMeth[CDD] Methodmeta.code;obscharCycleCycleobs.proposal.cyclefloatO-CObserved minus computed timetime.epochfloatResResidualstat.fit.residualfloatRefReferences (1)meta.refint