J/AJ/152/227ivo://CDS.VizieR/J/AJ/152/227doi:10.26093/cds/vizier.51520227CDSSamec R.G.Nyaude R.Caton D.B.Faulkner D.R.2017-06-21T08:21:36Z2017-01-27T15:35:45ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsinfrared-photometryvisible-astronomybroad-band-photometryBVR_c_I_c_ light curves of NSVS 5066754 were taken on 2014 May at Dark Sky Observatory in North Carolina. This variable is a solar-type eclipsing binary (T1~5750K) with a period of only 0.3751689(1) days. It appeared to be one of the shortest periods in Shaw's list of near-contact binaries. The Binary Maker fits and our Wilson-Devinney solutions show that the binary could have both semidetached and marginal contact binary configurations. Five new times of minimum light were calculated, along with two minima determined from archived All Sky Automated Survey observations. From these minima and the discovery epoch, a quadratic ephemeris was determined. Thus, a magnetic braking scenario is possible. Both semidetached and contact models were explored. A marginal contact solution had the best sum of square residuals. It gave a mass ratio of ~0.5, and a component temperature difference of ~360K, albeit somewhat large for a contact binary. Two substantial cool spots were determined in this solution with 37{deg} and 28{deg} radii and t-factors or 0.94 and 0.78 respectively. The fill-out is very shallow, ~106%. It may have recently achieved contact.2016AJ....152..227Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/152/227CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-2014)B/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2013)J/AJ/152/219 : BVRI light curves of DD Indi (Samec+, 2016)J/AJ/149/48 : BVRI light curves of ZZ Eri (Samec+, 2015)J/AJ/149/30 : BVRI photometry of V1001 Cas in 2012 (Samec+, 2015)J/AJ/147/3 : BV(RI)c light curves of V2421 Cyg (Samec+, 2014)J/AJ/145/14 : BV(RI)c light curves of V1043 Cas (Samec+, 2013)J/AJ/136/1067 : New beta Lyrae and Algol candidates in NSVS (Hoffman+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/152/227https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/152/227http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/152/227https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/152/227https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/152/227http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/152/227GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfraredOpticaldefaultJ/AJ/152/227/table2Observations of NSVS 5066754recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFlt[BVRI] Filter (Johnson-Cousins B, V, R_c_, or I_c_)pos.cartesian.ycharHJD[4.5/7.75] Modified Heliocentric Julian Date (HJD-2457270)time.epochfloatDmag[-0.45/0.76] The {Delta} magnitude in Flt (in the sense of variable minus comparison star) (1)magphot.mag;arith.difffloat