J/A+A/553/A44ivo://CDS.VizieR/J/A+A/553/A44doi:10.26093/cds/vizier.35530044CDSKovacs G.Kovacs T.Hartman J.D.Bakos G.A.Bieryla A.Latham D.,Noyes R.W.Regaly Zs.Esquerdo G.A.2017-06-13T11:09:20Z2013-04-30T10:53:27ZCDS support team

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

cds-question@unistra.frmultiple-starssolar-system-planetsphotometryHD 15082 (WASP-33) is the hottest and fastest rotating star known to harbor a transiting extrasolar planet (WASP-33b) The lack of high precision radial velocity (RV) data stresses the need for precise light curve analysis and gathering further RV data. By using available photometric and RV data, we perform a blend analysis, compute more accurate system parameters, confine the planetary mass and attempt to cast light on the observed transit anomalies. We combine the original HATNet observations and various followup data to jointly analyze the signal content and extract the transit component and use our RV data to aid the global parameter determination. The blend analysis of the combination of multicolor light curves yields the first independent confirmation of the planetary nature of WASP-33b. We clearly identify three frequency components in the 15-21c/d regime with amplitudes 5-7mmag. These frequencies correspond to the delta Scuti-type pulsation of the host star. None of these pulsation frequencies or their low-order linear combinations are in close resonance with the orbital frequency. We show that these pulsation components explain some but not all of the observed transit anomalies. The grand-averaged transit light curve shows that there is a ~1.5mmag brightening shortly after the planet passes the mid-transit phase. Although the duration and amplitude of this brightening varies, it is visible even through the direct inspections of the individual transit events (some 40-60% of the followup light curves show this phenomenon). We suggest that the most likely explanation of this feature is the presence of a well-populated spot belt which is highly inclined to the orbital plane. This geometry is consistent with the inference from the spectroscopic anomalies. Finally, we constrain the planetary mass to M_p_=3.27+/-0.73M_J_ by using our RV data collected by the TRES spectrograph.2013A&A...553A..44Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/553/A44CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/MNRAS/408/1680 : Transiting planetary system WASP-2 (Southworth+, 2010)J/ApJ/715/421 : Relative photometry of WASP-3 (Tripathi+, 2010)J/MNRAS/399/287 : Transiting planetary system WASP-4 (Southworth+, 2009)J/AJ/137/3826 : Two transits of the giant planet WASP-4b (Winn+, 2009)J/A+A/530/A5 : WASP-4b thermal emission Ks-band detection (Caceres+, 2011)J/A+A/539/A159 : WASP-4b transit griz light curves (Nikolov+, 2012)J/MNRAS/396/1023 : Transiting planetary system WASP-5 (Southworth+, 2009)J/A+A/501/785 : Discovery and characterization of WASP-6b (Gillon+, 2009)J/A+A/527/A8 : Transiting planetary system WASP-7 (Southworth+, 2011)J/A+A/517/L1 : Radial velocities of WASP-8b planet (Queloz+, 2010)J/ApJ/692/L100 : Relative photometry of WASP-10 (Johnson+, 2009)J/A+A/535/A7 : Transit light curves of WASP-10 b (Maciejewski+, 2011)J/ApJ/720/872 : A spectropolarimetric analysis of WASP-12 (Fossati+, 2010)J/A+A/528/A65 : WASP-12b transits (Maciejewski+, 2011)J/AJ/141/179 : Transits of TrES-4b, HAT-P-3b and WASP-12b (Chan+, 2011)J/A+A/502/391 : WASP-13b photometry and radial velocities (Skillen+, 2009)J/ApJ/709/159 : Relative Ic photometry of WASP-17 (Anderson+, 2010)J/ApJ/707/167 : Transiting planetary system WASP-18 (Southworth+, 2009)J/A+A/513/L3 : WASP-19b H-band thermal emission (Anderson+, 2010)J/A+A/519/A98 : Transit of exoplanet WASP-21b (Bouchy+, 2010)J/A+A/534/A16 : WASP-22 & WASP-26 photometry & velocities (Anderson+, 2011)J/A+A/531/A24 : WASP-23 photometric and radial velocity data (Triaud+, 2011)J/A+A/520/A56 : WASP-26b RV and photometric data (Smalley+, 2010)J/ApJ/726/L19 : Gunn r photometry of WASP-30 (Anderson+, 2011)J/A+A/531/A60 : WASP-31b photometry and radial velocities (Anderson+, 2011)J/A+A/526/A130 : WASP-34b photometry and radial velocities (Smalley+, 2011)J/A+A/525/A54 : Transits of WASP-38b (Barros+, 2011)J/A+A/531/A40 : Transits of WASP-39b (Faedi+, 2011)J/A+A/542/A4 : WASP-43b thirty eclipses (Gillon+, 2012)J/A+A/544/A72 : WASP-42 and WASP-49 photometry and velocities (Lendl+, 2012)J/A+A/533/A88 : WASP-50b photometry and radial velocities (Gillon+, 2011)J/A+A/547/A61 : WASP78 and WASP79 RV and photometric data (Smalley+, 2012)J/A+A/526/L10 : Transits of WASP-33 (Herrero+, 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/553/A44https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/553/A44http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/553/A44https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/553/A44https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/553/A44http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/553/A44GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap2.367228618189496e-19 2.6706780932288093e-19OpticaldefaultJ/A+A/553/A44/averageAverage light curverecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPhasePhase relative to the transit center (1)time.phasedoubledmagReversed differential magnitudes of the grand-averaged/phased/binned LC with the out-of-transit level shifted to zeromagphot.mag;arith.diffdoublee_dmagStandard deviations of the bin averages (i.e., of Col. dmag)magstat.error;phot.magdoubleM-DData residual after subtracting the standard transit model (model-data)magstat.fit.residualdoubleJ/A+A/553/A44/table1Photometric datasets on WASP-33recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintplotShow the ligth curvesmeta.ref.urlcharLCLight curve numbermeta.idintn_LC[X] X for light curve not used in the analysis (1)meta.notecharDateUT starting date of observation (2)time.start;obscharNNumber of data pointsmeta.numberintFiltFilter used in the observation (3)instr.setup;obscharSourceObserver or observatory namemeta.bibcharJ/A+A/553/A44/hatnetHATNet light curverecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Date (HJD-2400000.0)dtime.epochdoubleIcmagApproximate Ic (Cousins) magnitudemagphot.mag;em.opt.Idouble