J/MNRAS/431/966ivo://CDS.VizieR/J/MNRAS/431/966doi:10.26093/cds/vizier.74310966CDSTregloan-Reed J.Southworth J.2024-07-21T20:14:58Z2018-05-24T12:36:07ZCDS support team

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

cds-question@unistra.frmultiple-starssolar-system-planetsphotometryWe present photometric observations of two transits in the WASP-50 planetary system, obtained using the ESO New Technology Telescope and the defocused-photometry technique. The rms scatters for the two data sets are 258 and 211 ppm with a cadence of 170-200s, setting a new record for ground-based photometric observations of a point source. The data were modelled and fitted using the prism and gemc codes, and the physical properties of the system calculated. We find the mass and radius of the hot star to be 0.861+/-0.057M{sun} and 0.855+/-0.019R{sun}, respectively. For the planet we find a mass of 1.437+/-0.068M_Jup_, a radius of 1.138+/-0.026R_Jup_ and a density of 0.911+/-0.033{rho}Jup. These values are consistent with but more precise than those found in the literature. We also obtain a new orbital ephemeris for the system: T_0_= BJD/TDB 2455558.61237(20)+1.9550938(13)xE.2013MNRAS.431..966Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/431/966CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/MNRAS/396/1023 : Transiting planetary system WASP-5 (Southworth+, 2009)J/MNRAS/399/287 : Transiting planetary system WASP-4 (Southworth+, 2009)J/ApJ/707/167 : Transiting planetary system WASP-18 (Southworth+, 2009)J/MNRAS/408/1680 : Transiting planetary system WASP-2 (Southworth+, 2010)J/A+A/527/A8 : Transiting planetary system WASP-7 (Southworth+, 2011)J/MNRAS/420/2580 : Four transits of HAT-P-13 (Southworth+, 2012)J/MNRAS/422/3099 : Transits of HAT-P-5 (Southworth+, 2012)J/MNRAS/426/1338 : Transiting planetary system WASP-17 (Southworth+, 2012)J/MNRAS/428/3671 : Transiting planet WASP-19b (Tregloan-Reed+, 2013)J/MNRAS/434/1300 : Planetary systems WASP-15, WASP-16 (Southworth+, 2013)J/MNRAS/444/776 : WASP-24, WASP-25 and WASP-26 (Southworth+, 2014)J/MNRAS/447/711 : Transiting planetary system WASP-103 (Southworth+, 2015)J/MNRAS/450/1760 : Transiting planet WASP-6b (Tregloan-Reed+, 2015)J/MNRAS/454/3094 : Transiting planetary system WASP-57 (Southworth+, 2016)J/MNRAS/457/4205 : WASP-22, WASP-41, WASP-42 and WASP-55 (Southworth+, 2016)J/AJ/153/191 : Transiting planetary system GJ 1132 (Southworth+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/431/966https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/431/966http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/431/966https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/431/966https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/431/966http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/431/966GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/MNRAS/431/966/wasp50Photometry of WASP-50 (corrected version, 22/03/2021)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric JD for the midpoint of observation (TDB)dtime.epochdoubledmagDifferential magnitude in the Gunn r filtermagphot.mag;arith.diffdoublee_dmagMeasurement error of the differential magnitudemagstat.error;phot.magdouble