J/ApJ/770/36ivo://CDS.VizieR/J/ApJ/770/36doi:10.26093/cds/vizier.17700036CDSKundurthy P.Barnes R.Becker A.C.Agol E.Williams B.F.Gorelick N.,Rose A.2017-06-28T06:58:44Z2015-01-28T08:47:41ZCDS support team

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

cds-question@unistra.frmultiple-starssolar-system-planetsinfrared-photometryvisible-astronomyphotometryThe Apache Point Survey of Transit Lightcurves of Exoplanets (APOSTLE) observed 10 transits of XO-2b over a period of 3yr. We present measurements that confirm previous estimates of system parameters like the normalized semi-major axis (a/R_*_), stellar density ({rho}_*_), impact parameter (b), and orbital inclination (i_orb_). Our errors on system parameters like a/R_*_ and {rho}_*_ have improved by ~40% compared to previous best ground-based measurements. Our study of the transit times show no evidence for transit timing variations (TTVs) and we are able to rule out co-planar companions with masses >=0.20M_{Earth}_ in low order mean motion resonance with XO-2b. We also explored the stability of the XO-2 system given various orbital configurations of a hypothetical planet near the 2:1 mean motion resonance. We find that a wide range of orbits (including Earth-mass perturbers) are both dynamically stable and produce observable TTVs. We find that up to 51% of our stable simulations show TTVs that are smaller than the typical transit timing errors (~20s) measured for XO-2b, and hence remain undetectable.2013ApJ...770...36Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/770/36CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/552/A119 : Planet-star and moon-planet interaction (Saur+, 2013)J/ApJ/764/8 : APOSTLE transit lightcurves of TrES-3b (Kundurthy+, 2013)J/ApJ/757/161 : Spectroscopy of 56 exoplanet host stars (Torres+, 2012)J/MNRAS/426/1291 : Physical properties of 38 exoplanets (Southworth, 2012)J/MNRAS/422/2024 : X-ray-age relation & exoplanet evaporation (Jackson+, 2012)J/A+A/529/A75 : Limb-darkening coefficients (Claret+, 2011)J/PASP/123/412 : Exoplanet Orbit Database (Wright+, 2011)J/MNRAS/414/1278 : Eccentricities of transiting planets (Pont+, 2011)J/MNRAS/411/L46 : Exoplanet magnetic fields (Vidotto+, 2011)J/ApJ/731/123 : APOSTLE light curve of GJ 1214b (Kundurthy+, 2011)J/ApJ/716/1336 : Stability analysis of single-planet (Kopparapu+, 2010)J/AJ/137/4911 : Six transits of the exoplanet XO-2b (Fernandez+, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/770/36https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/770/36http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/770/36https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/770/36https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/770/36http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/770/36GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/ApJ/770/36/table10Data on the stability simulations of the XO-2 systemeEccentricity (2)src.orbital.eccentricityfloatECons[0/2.7] Energy conservation (3)phys.energydoubleSimID[0/3599999] Simulation identifier (1)meta.idintprimaryMpMass of perturber; Earth masses (2)(5.97236x10+24kg)phys.massfloataSemi-major axis (2)AUphys.size.smajAxisfloatiOrbital inclination (2)degsrc.orbital.inclinationintOmegaArgument of pericenter (2)degsrc.orbitalfloatomegaLongitude of ascending node (2)degsrc.orbital.nodeintMMean anomaly (2)degsrc.orbital.meanAnomalyintStab[0/1] Stability outcome (1=stable) (3)meta.codeintstdTTV[0/370800]? Standard deviation of transit timing variations (3)sstat.stdevdoublenullablestdTDV[0/0.01]? Standard deviation of transit depth variations (3)stat.stdevdoublenullablestdTBV[0/0.07]? Standard deviation of transit impact parameter (b) variations (3)stat.stdevdoublenullableJ/ApJ/770/36/table3APOSTLE lightcurve data for XO-2TNum[1/10] Transit Numbermeta.idintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintT-T0[-0.16/0.14] Time - Mid Transit Time; BJD (1)dstat.fit.residualdoubleNFlux[0.98/1.01] Normalized flux ratiophot.flux;arith.ratiodoublee_NFluxError in NFluxstat.errordoubleMFlux[0.98/1] Transit Modelphot.flux;meta.modelleddouble