J/ApJ/754/136ivo://CDS.VizieR/J/ApJ/754/136doi:10.26093/cds/vizier.17540136CDSStevenson K.B.Harrington J.Fortney J.J.Loredo T.J.Hardy R.A.,Nymeyer S.Bowman W.C.Cubillos P.Bowman M.O.Hardin M.2014-04-20T18:01:01Z2014-04-08T07:15:05ZCDS support team

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

cds-question@unistra.frmultiple-starsinfrared-photometrysolar-system-planetsThe dayside of HD 149026b is near the edge of detectability by the Spitzer Space Telescope. We report on 11 secondary-eclipse events at 3.6, 4.5, 3x5.8, 4x8.0, and 2x16{mu}m plus three primary-transit events at 8.0{mu}m. The eclipse depths from jointly fit models at each wavelength are 0.040%+/-0.003% at 3.6{mu}m, 0.034%+/-0.006% at 4.5{mu}m, 0.044%+/-0.010% at 5.8{mu}m, 0.052%+/-0.006% at 8.0{mu}m, and 0.085%+/-0.032% at 16{mu}m. Multiple observations at the longer wavelengths improved eclipse-depth signal-to-noise ratios by up to a factor of two and improved estimates of the planet-to-star radius ratio (R_p_/R_{sstarf}_=0.0518+/-0.0006). We also identify no significant deviations from a circular orbit and, using this model, report an improved period of 2.8758916+/-0.0000014 days. Chemical-equilibrium models find no indication of a temperature inversion in the dayside atmosphere of HD 149026b. Our best-fit model favors large amounts of CO and CO_2_, moderate heat redistribution (f=0.5), and a strongly enhanced metallicity. These analyses use BiLinearly-Interpolated Subpixel Sensitivity (BLISS) mapping, a new technique to model two position-dependent systematics (intrapixel variability and pixelation) by mapping the pixel surface at high resolution. BLISS mapping outperforms previous methods in both speed and goodness of fit. We also present an orthogonalization technique for linearly correlated parameters that accelerates the convergence of Markov chains that employ the Metropolis random walk sampler.2012ApJ...754..136Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/754/136CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/552/A119 : Planet-star and moon-planet interaction (Saur+, 2013)J/A+A/527/A140 : Mass limits on substellar companions (Reffert+, 2011)J/MNRAS/414/1278 : Eccentricities of transiting planets (Pont+, 2011)J/MNRAS/411/L46 : Exoplanet magnetic fields (Vidotto+, 2011)J/AJ/141/11 : Spitzer obs. of planet-host stars (Dodson-Robinson+, 2011)J/ApJ/733/68 : Exoplanet masses derived from RVs (Brown+, 2011)J/ApJ/716/1336 : Stability analysis of single-planet (Kopparapu+, 2010)J/ApJ/705/1226 : Planet-bearing stars in Spitzer (Bryden+, 2009)J/ApJ/700/L73 : Photospheric fluxes at 24 and 70{mu}m (Kospal+, 2009)J/ApJ/692/L9 : Tidal evolution of transiting exoplanets (Levrard+, 2009)J/ApJ/675/1531 : Transits of super-Neptune HD 149026b (Winn+, 2008)J/ApJ/666/475 : Extrasolar planet taxonomy (Marchi+, 2007)J/ApJ/649/1010 : Habitability of known exoplanetary systems (Jones+, 2006)J/ApJ/646/505 : Catalog of nearby exoplanets (Butler+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/754/136https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/754/136http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/754/136https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/754/136https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/754/136http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/754/136GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfrareddefaultJ/ApJ/754/136/table1Observation informationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLabelObservation label (HD149b[p/s]NN) (1)meta.id;obscharDateObservation datetime.epoch;obsnullableDur[330/499] Durationmintime.durationintExp[0.4/14] Frame exposure timespos.frame;obs.field;obs.exposurefloatNfr[1050/70000] Total number of framesmeta.numberintPipelineSpitzer pipeline ("S18.7.0" or "S18.18.0")meta.softwarecharlambda[3.6/16] Observation wavelengthumem.wl;obsfloatRefPrevious publications (2)meta.ref;pos.framecharMJDMJD date of observation at start (JD-2400000.5) (3)dtime.epochdoubleLCSpitzer light curvesmeta.ref.urlcharfitsDownload the FITS tablemeta.ref.urlcharFileNameName of FITS file in subdirectory fits (3)meta.id;meta.fitschar