J/AJ/149/111ivo://CDS.VizieR/J/AJ/149/111doi:10.26093/cds/vizier.51490111CDSLiu L.Chen W.P.Qian S.B.Chuang R.J.Jiang L.Q.Lin C.S.Hsiao H.Y.2017-06-27T06:38:21Z2015-03-25T09:22:11ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsinfrared-photometryvisible-astronomybroad-band-photometryThe star 1SWASP J022727.03+115641.7 was reported as a contact binary with a period shorter than the empirical limit of such systems. Our study shows the star not to be variable. Instead, it is the nearby star, 2MASS 02272637+1156494, that exhibits variability. The BRI CCD light curves of 2MASS 02272637+1156494 show the system to be a moderate mass ratio (2.154_-0.074_^+0.008^), and shallow contact (10.4_-1.9_^+1.4^%) W-type contact binary. The masses, radii, and luminosities of the binary components are, respectively, M_1_=0.25_-0.01_^+0.05^M_{sun}_, M_2_=0.54_-0.04_^+0.11^M_{sun}_, R_1_=0.45_-0.01_^+0.02^R_{sun}_, R_2_=0.63_-0.02_^+0.04^R_{sun}_, L_1_=0.038_-0.005_^+0.018^L_{sun}_, and L_2_=0.071_-0.010_^+0.037^L_{sun}_, with an estimated distance 326_-46_^+127^ pc. These uncertainties mainly come from the errors of the colors used to estimate the temperature of the primary star. A dark spot was introduced on the massive component in the final solution.2015AJ....149..111Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/149/111CatalogResearchIsServedByTAP VizieR generic servicerelated-toI/297 : NOMAD Catalog (Zacharias+ 2005)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/A+A/528/A90 : SuperWASP short period eclipsing binaries (Norton+, 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/149/111https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/149/111http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/149/111https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/149/111https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/149/111http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/149/111GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/AJ/149/111/table1The original data of 2MASS 02272637+1156494 observed in the BRI bands by the Lulin One-meter Telescope (LOT)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Date (HJD-2456500)dtime.epochdoubleDmag[-0.085/1.349] {Delta} magnitudemagphot.mag;arith.difffloate_DmagUncertainty in Dmagmagstat.error;phot.mag;arith.difffloatFlt[BRI] Filter (B, R, or I)meta.id;instr.filterchar