J/AJ/158/113ivo://CDS.VizieR/J/AJ/158/113doi:10.26093/cds/vizier.51580113CDSHowell S.B.Scott N.J.Matson R.A.Horch E.P.Stephens A.2019-11-06T06:50:24Z2019-11-06T07:45:08ZCDS support team

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

cds-question@unistra.frmultiple-starsphotometryvisible-astronomyexoplanetsUsing the high-resolution imaging instrument, 'Alopeke, at the Gemini-N telescope, we obtained simultaneous two-channel time-series observations of the binary exoplanet host star Kepler13-AB. Our optical observations were obtained during a transit event of the exoplanet Kepler-13b and light curves were produced using both speckle interferometric and aperture photometry techniques. Both techniques confirm that the transiting object orbits the star Kepler-13A while different transit depths are seen across the optical wavelength range, being ~2 times deeper in the blue. These measurements, as well as mass determinations in the literature, are consistent with Kepler-13b being a highly irradiated gas giant with a bloated atmosphere. Our observations highlight the ability of high-resolution speckle imaging to not only assess binarity in exoplanet host stars but robustly determine which of the stars the transiting object actually orbits.2019AJ....158..113Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/158/113CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/544/L12 : Velocitometry transit of KOI-13 (Santerne+, 2012)J/ApJ/788/92 : The hot Jupiter Kepler-13Ab planet's occultationJ/ApJS/210/19 : Kepler planetary candidates. IV. 22 months (Burke+, 2014)J/AJ/153/71 : Kepler follow-up observation program. I. Imaginghttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/158/113https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/158/113http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/158/113https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/158/113https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/158/113http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/158/113GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AJ/158/113/table3Kepler-13AB aperture photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBand[562/832] Wavebandnminstr.bandpassintTime[8.88/12.58]? Mean UT timehtime.epochfloatnullableDmag[-0.2/-0.1224]? Differential magnitude in Bandmagphot.mag;arith.difffloatnullablee_Dmag[0.0028/0.0065]? Standard error in Dmag {sigma}/sqrt(N)magstat.error;phot.mag;arith.difffloatnullable