J/AJ/157/217ivo://CDS.VizieR/J/AJ/157/217doi:10.26093/cds/vizier.51570217CDSBouma L.G.Winn J.N.Baxter C.Bhatti W.Dai F.Daylan T.,Desert J.-M.Hill M.L.Kane S.R.Stassun K.G.Villasenor J.,Ricker G.R.Vanderspek R.Latham D.W.Seager S.Jenkins J.M.,Berta-Thompson Z.Colon K.Fausnaugh M.Glidden A.Guerrero N.,Rodriguez J.E.Twicken J.D.Wohler B.2019-09-13T13:23:02Z2019-09-13T14:18:51ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsThe Transiting Exoplanet Survey Satellite (TESS) recently observed 18 transits of the hot Jupiter WASP-4b. The sequence of transits occurred 81.6+/-11.7 s earlier than had been predicted, based on data stretching back to 2007. This is unlikely to be the result of a clock error, because TESS observations of other hot Jupiters (WASP-6b, 18b, and 46b) are compatible with a constant period, ruling out an 81.6 s offset at the 6.4{sigma} level. The 1.3 day orbital period of WASP-4b appears to be decreasing at a rate of P=-12.6+/-1.2 ms per year. The apparent period change might be caused by tidal orbital decay or apsidal precession, although both interpretations have shortcomings. The gravitational influence of a third body is another possibility, though at present there is minimal evidence for such a body. Further observations are needed to confirm and understand the timing variation.2019AJ....157..217Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/157/217CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/501/785 : Discovery and characterization of WASP-6b (Gillon+, 2009)J/AJ/137/3826 : Two transits of the giant planet WASP-4b (Winn+, 2009)J/ApJ/707/167 : Transiting planetary system WASP-18 (Southworth+, 2009)J/MNRAS/396/1023 : Transiting planetary system WASP-5 (Southworth+, 2009)J/MNRAS/399/287 : Transiting planetary system WASP-4 (Southworth+, 2009)J/ApJ/733/127 : Four transits of WASP-4b (Sanchis-Ojeda+, 2011)J/A+A/539/A159 : WASP-4b transit griz light curves (Nikolov+, 2012)J/MNRAS/422/1988 : Three short-period, transiting exoplanets (Anderson+, 2012)J/ApJ/809/77 : Transiting Exoplanet Survey Satellite (TESS)J/MNRAS/450/1760 : Transiting planet WASP-6b (Tregloan-Reed+, 2015)J/AJ/156/102 : The TESS Input Catalog and Candidate Target Listhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/157/217https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/157/217http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/157/217https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/157/217https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/157/217http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/157/217GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/AJ/157/217/transitsWASP-4b (table 2) , WASP-5b (table 5) , WASP-6b (table 6) , WASP-18b (table 7) and WASP-46b (table 8) transit times, uncertainties and referencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPlanetPlanet namemeta.id;meta.maincharTtraMeasured transit midtime (BJD_TDB_) (1)dtime.epochdoublee_Ttra[5e-05/0.00184] 1{sigma} uncertainty in Ttra (2)dstat.errordoubleEpoch[-4037/1925] Epochtime.epochintH13[0/1]? The midtime value was taken from Hoyer et al. (2013MNRAS.434...46H) (=1) or from Ref (=0) (only in Table 2)meta.codeintnullableRefReference describing the original observations (3)meta.ref;pos.frame;obscharBibcodeBibcode of the referencemeta.bib.bibcodecharComComment on Refmeta.ref;pos.framechar