J/AJ/168/272ivo://CDS.VizieR/J/AJ/168/272doi:10.26093/cds/vizier/be-58-8gCDSPoro A.Li K.Michel R.Castro A.Lajus E.F.Wang L.-H.,Coliac J.-F.Aladag Y.Alizadehsabegh A.Alicavus F.2026-08-03T07:20:06Z2025-09-03T15:28:19ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsmultiple-starsinfrared-photometryvisible-astronomybroad-band-photometryPhotometric observations were made with standard filters in four observatories for 10 contact binary systems. We analyzed the orbital period variations of the systems and found that six of them show long-term changes. The increase in the orbital period of the J07, N65, and PU Vir systems is caused by mass transfer, and the reduction in the orbital period of the J05, LO Psc, and N49 systems is caused by the combination of angular momentum loss and mass transfer. The first light-curve analysis was performed with the PHysics Of Eclipsing BinariEs Python code and Markov Chain Monte Carlo. We discussed the accuracy of photometric mass ratio estimates for contact binary systems with total and partial eclipses compared to spectroscopic results. We also compared our mass ratio findings to a recent method that estimates mass ratios from the light curve's third derivative. Then, we also discussed this new mass ratio estimate method for photometric data. The systems' positions were displayed in 18 empirical parameter relationships. According to the light-curve analysis and estimation of absolute parameters, systems BE Mus, J07, J08, N49, and N65 are A subtypes, and the others are W subtypes.2024AJ....168..272Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/168/272CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-)II/366 : ASAS-SN catalog of variable stars (Jayasinghe+, 2018-2020)IV/39 : TESS Input Catalog version 8.2 (TIC v8.2) (Paegert+, 2021)J/ApJ/469/355 : Teff, B-V and BC relation (Flower, 1996)J/A+AS/141/371 : Low-mass stars evol. tracks & isochrones (Girardi+, 2000)J/A+A/426/1001 : Catalog of contact binary stars (Csizmadia+, 2004)J/ApJ/629/1055 : Evolution of close binary systems (Yakut+, 2005)J/other/PASA/23.154 : BV LCs of XY Leo, EE Cet, AQ Psc (Djurasevic+ 2006)J/MNRAS/373/1483 : W UMa type and CAB stars dynamical evolution (Eker+, 2006)J/AJ/131/621 : Catalog of 1022 bright contact binary stars (Gettel+, 2006)J/A+A/446/785 : Catalogue of eclipsing variables (Malkov+, 2006)J/AJ/133/1470 : TAROT suspected variable star catalog (Damerdji+, 2007)J/A+A/465/943 : BVI and RV curves of 5 eclipsing binaries (Szalai+, 2007)J/AJ/138/466 : NSVS variables automated classification (Hoffman+, 2009)J/AJ/137/3655 : Radial velocities of 8 close binaries (Pribulla+, 2009)J/MNRAS/412/1787 : Physical parameters of 62 eclipsing binaries (Deb+, 2011)J/AJ/143/99 : Photometry of W UMa eclipsing binaries (Terrell+, 2012)J/AN/334/860 : Catalogue of eclipsing variables. v2 (Avvakumova+, 2013)J/ApJS/213/9 : Catalina Surveys periodic variable stars (Drake+, 2014)J/ApJ/788/48 : X-ray through NIR photometry of NGC 2617 (Shappee+, 2014)J/MNRAS/465/4678 : 9380 contact binaries from CRTS VSC (Marsh+, 2017)J/MNRAS/479/5491 : Absolute parameters of 509 main-sequence stars (Eker+, 2018)J/AJ/156/102 : TESS Input Catalog & Candidate Target List (Stassun+, 2018)J/ApJ/867/105 : ATLAS all-sky stellar ref. cat. ATLAS-REFCAT2 (Tonry+, 2018)J/ApJS/249/18 : The ZTF catalog of periodic variable stars (Chen+, 2020)J/AJ/159/189 : Eclipse timings for 9 contact binaries (Li+, 2020)J/ApJS/247/50 : Late-type contact binaries in CSS DR1 (Sun+, 2020)J/ApJS/254/10 : Compilation of W UMa stars (Latkovic+, 2021)J/AJ/162/13 : Parameters estimation for 173 eclipsing binaries (Li+, 2021)J/AJ/164/202 : Extremely Low Mass Ratio Contact Binar. I. 10 syst. (Li+, 2022)J/A+A/674/A33 : Gaia synthetic phot. cat. of white dwarfs (Gaia Coll., 2023)J/A+A/672/A176 : Mass-ratio distribution: contact binary stars (Pesta+, 2023)J/ApJS/271/32 : ASAS-SN eclipsing contact binaries with Gaia DR3 (Li+, 2024)http://var2.astro.cz/ocgate/ : O-C Gateway (Czech Astronomical Society)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/168/272https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/168/272http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/168/272https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/168/272https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/168/272http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/168/272GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/168/272/targets (List of targets and their light curves (Table added by CDS))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/168/272/targets?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/168/272/targets?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/168/272/targets?GETtext/xml+votable180.050000true185.2747161-66.50901030.0055555555555555566/931 2462 5724 6408 6921 7770 19934 24266 26169 41641https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/168/272?format=asciiOpticalInfrareddefaultJ/AJ/168/272/table5The times of minima extracted from our observations and space-based data and collected from the literaturerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDSystem identifiermeta.id;meta.maincharprimaryBJD[2452407/2460378] Barycentric Julian Date (TDB) of minimumdtime.epochdoublee_BJD[1e-4/5e-3] Uncertainty in BJDdstat.error;time.epochfloatEpoch[-31103/47] Epoch numbertime.epochdouble(O-C)[-0.07/0.03] The (O-C) value, observed minus collected from literaturestat.value;stat.fit.omcfloatSourceSource for the minimum data (1)meta.bibcharJ/AJ/168/272/fig4Binary systems' observed and final synthetic light curvesIDSystem identifiermeta.id;meta.maincharprimaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIcPhase[-0.1/0.9]? Ic band phasetime.phase;em.opt.IfloatnullableIcFlux[0.6/1]? Normalized Ic (786.5nm) band fluxphot.flux;arith.ratio;em.opt.Ifloatnullablee_IcFlux[1e-3/0.11]? Uncertainty in I-Fluxstat.error;phot.flux;arith.ratiofloatnullableRcPhase[-0.1/0.9]? Rc band phasetime.phase;em.opt.RfloatnullableRcFlux[0.5/1]? Normalized Rc (647nm) band fluxphot.flux;arith.ratio;em.opt.Rfloatnullablee_RcFlux[1e-4/0.11]? Uncertainty in R-Fluxstat.error;phot.flux;arith.ratiofloatnullableVPhase[-0.1/0.9]? V band phasetime.phase;em.opt.VfloatnullableVFlux[0.5/1]? Normalized V (540nm) band fluxphot.flux;arith.ratio;em.opt.Vfloatnullablee_VFlux[1e-3/0.93]? Uncertainty in V-Fluxstat.error;phot.flux;arith.ratiofloatnullableBPhase[-0.1/0.9]? B band phasetime.phase;em.opt.BfloatnullableBFlux[0.6/1]? Normalized B (442nm) band fluxphot.flux;arith.ratio;em.opt.Bfloatnullablee_BFlux[1e-3/1]? Uncertainty in B-Fluxstat.error;phot.flux;arith.ratiofloatnullableJ/AJ/168/272/targetsList of targets and their light curves (Table added by CDS)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDSystem identifiermeta.id;meta.maincharprimaryNminNumber of times of minima observed for this target (link to Table 5)meta.numberintnullableNfNumber of flux measurements for this target (link to Table fig4)meta.numberintnullableLCInteractive light curve plotmeta.ref.urlcharSimbadNameSimbad column added by the CDSmeta.idcharnullable_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