J/AJ/166/223ivo://CDS.VizieR/J/AJ/166/223doi:10.26093/cds/vizier.51660223CDSA-thano N.Awiphan S.Jiang I.-G.Kerins E.Priyadarshi A.,McDonald I.Joshi Y.C.Chulikorn T.Hayes J.J.C.Charles S.,Huang C.-K.Rattanamala R.Yeh L.-C.Dhillon V.S.2024-11-06T20:18:16Z2024-04-25T08:39:38ZCDS support team

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

cds-question@unistra.frexoplanetsphotometryvisible-astronomyWe present a transit-timing variation (TTV) and planetary atmosphere analysis of the Neptune-mass planet HAT-P-26 b. We present a new set of 13 transit light curves from optical ground-based observations and combine them with light curves from the Wide Field Camera 3 on the Hubble Space Telescope, the Transiting Exoplanet Survey Satellite, and previously published ground-based data. We refine the planetary parameters of HAT-P-26 b and undertake a TTV analysis using 33 transits obtained over seven years. The TTV analysis shows an amplitude signal of 1.98{+/-}0.05minutes, which could result from the presence of an additional ~0.02MJup planet at a 1:2 mean-motion resonance orbit. Using a combination of transit depths spanning optical to near-infrared wavelengths, we find that the atmosphere of HAT-P-26b contains 2.4_-1.6}^+2.9^% H2O with a derived temperature of 590_-50_^+60^K.2023AJ....166..223Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/166/223CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/363/1081 : Non-linear limb-darkening law for LTE models (Claret 2000)J/A+A/428/1001 : Non-linear limb-dark law for LTE models. III. (Claret, 2004)J/AJ/142/84 : 10 new transit light curves of HAT-P-13b (Fulton+, 2011)J/ApJ/728/138 : Follow-up photometry of HAT-P-26 (Hartman+, 2011)J/MNRAS/427/343 : Infrared excesses of Hipparcos stars (McDonald+, 2012)J/MNRAS/463/771 : ExoMol XVIII. VO high-temp spectrum (McKemmish+, 2016)J/MNRAS/471/770 : Parameters & IR excesses of Gaia DR1 stars (McDonald+, 2017)J/MNRAS/480/3397 : ExoMol line lists XXXI C_2_ (Yurchenko+, 2018)J/MNRAS/488/2836 : ExoMol Molecular linelists. XXXIII. TiO (McKemmish+, 2019)J/A+A/628/A116 : HAT-P-26 differential transit photometry (von Essen+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/166/223https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/166/223http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/166/223https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/166/223https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/166/223http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/166/223GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AJ/166/223/table4The detrended and normalised photometry for HAT-P-26 b using the telescopes within SPEARNETrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEpoch[421/1045] Epoch identifiermeta.id;time.epochintFiltFilter usedinstr.setup;instr.filtercharBJD[2457087/2459730] Barycentric Julian Date; TDB baseddtime.epochdoubleindexedNFlux[0.96/1.04] Normalized flux in Filterphot.flux;instr.filterfloate_NFlux[0.002/0.03] Uncertainty in NFluxstat.errorfloat