J/A+A/668/A93ivo://CDS.VizieR/J/A+A/668/A93doi:10.26093/cds/vizier.36680093CDSParviainen H.Wilson T.G.Lendl M.Kitzmann D.Palle E.Serrano L.M.,Meier Valdes E.Benz W.Deline A.Ehrenreich D.Guterman P.Heng K.,Demangeon O.D.S.Bonfanti A.Salmon S.Singh V.Santos N.C.,Sousa S.G.Alibert Y.Alonso R.Anglada G.Barczy T.,Barrado Y Navascues D.Barros S.C.C.Baumjohann W.Beck M.Beck T.,Billot N.Bonfils X.Brandeker A.Broeg C.Cabrera J.Charnoz S.,Collier Cameron A.Corral Van Damme C.Csizmadia Sz.Davies M.B.,Deleuil M.Delrez L.Demory B.-O.Erikson A.Farinato J.Fortier A.,Fossati L.Fridlund M.Gandolfi D.Gillon M.Gudel M.Hoyer S.,Isaak K.G.Kiss L.L.Kopp E.Laskar J.Lecavelier des Etangs A.,Lovis C.Magrin D.Maxted P.F.L.Mecina M.Nascimbeni V.Olofsson G.,Ottensamer R.Pagano I.Peter G.Piazza D.Piotto G.Pollacco D.,Queloz D.Ragazzoni R.Rando N.Rauer H.Ribas I.Scandariato G.,Segransan D.Simon A.E.Smith A.M.S.Steller M.Szabo G.M.Thomas N.,Udry S.Van Grootel V.Walton N.A.2023-10-09T13:54:09Z2023-04-21T06:27:44ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsphotometryvisible-astronomyRecent studies based on photometry from the Transiting Exoplanet Survey Satellite (TESS) have suggested that the dayside of KELT-1b, a strongly irradiated brown dwarf, is significantly brighter in visible light than what would be expected based on Spitzer observations in the infrared. We observed eight eclipses of KELT-1b with CHaracterising ExOPlanet Satellite (CHEOPS) to measure its dayside brightness temperature in the bluest passband observed so far, and we jointly modelled the CHEOPS photometry with the existing optical and near-infrared photometry from TESS, LBT, CFHT, and Spitzer. Our modelling has led to a self-consistent dayside spectrum for KELT-1b covering the CHEOPS, TESS, H, Ks, and Spitzer IRAC 3.6 and 4.5um bands, where our TESS, H, Ks, and Spitzer band estimates largely agree with the previous studies. However, we discovered a strong discrepancy between the CHEOPS and TESS bands. The CHEOPS observations yield a higher photometric precision than the TESS observations, but they do not show a significant eclipse signal, while a deep eclipse is detected in the TESS band. The derived TESS geometric albedo of 0.36_-0.13_^+0.12^ is difficult to reconcile with a CHEOPS geometric albedo that is consistent with zero because the two passbands have considerable overlap. Variability in cloud cover caused by the transport of transient nightside clouds to the dayside could provide an explanation for reconciling the TESS and CHEOPS geometric albedos, but this hypothesis needs to be tested by future observations.2022A&A...668A..93Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/668/A93CatalogResearchIsServedByTAP VizieR generic servicerelated-tohttps://github.com/hpparvi/cheops_kelt_1 : Paper GitHub repository.https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/668/A93https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/668/A93http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/668/A93https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/668/A93https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/668/A93http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/668/A93GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/668/A93/visit1Photometry for CHEOPS visit 1 (11 components)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDTime of mid-exposure (BJD)time.epochdoubleFlux[0.99/1.01] Normalized fluxphot.flux;arith.ratiodoublee_Flux[0.0/0.01] Normalized flux uncertaintystat.error;phot.fluxdoubletheta0PSF component 0stat.fit.paramdoubletheta1PSF component 1stat.fit.paramdoubletheta2PSF component 2stat.fit.paramdoubletheta3PSF component 3stat.fit.paramdoubletheta4PSF component 4stat.fit.paramdoubletheta5PSF component 5stat.fit.paramdoubletheta6PSF component 6stat.fit.paramdoubletheta7PSF component 7stat.fit.paramdoubletheta8PSF component 8stat.fit.paramdoubletheta9PSF component 9stat.fit.paramdoubletheta10PSF component 10stat.fit.paramdoubletheta11PSF component 11stat.fit.paramdoubleJ/A+A/668/A93/visit2Photometry for CHEOPS visit 2 (20 components)theta7PSF component 7stat.fit.paramdoubletheta6PSF component 6stat.fit.paramdoubletheta8PSF component 8stat.fit.paramdoubletheta9PSF component 9stat.fit.paramdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDTime of mid-exposure (BJD)time.epochdoubleFlux[0.99/1.01] Normalized fluxphot.flux;arith.ratiodoublee_Flux[0.0/0.01] Normalized flux uncertaintystat.error;phot.fluxdoubletheta0PSF component 0stat.fit.paramdoubletheta1PSF component 1stat.fit.paramdoubletheta2PSF component 2stat.fit.paramdoubletheta3PSF component 3stat.fit.paramdoubletheta4PSF component 4stat.fit.paramdoubletheta5PSF component 5stat.fit.paramdoubletheta10PSF component 10stat.fit.paramdoubletheta11PSF component 11stat.fit.paramdoubletheta12? PSF component 12stat.fit.paramdoublenullabletheta13? PSF component 13stat.fit.paramdoublenullabletheta14? PSF component 14stat.fit.paramdoublenullabletheta15? PSF component 15stat.fit.paramdoublenullabletheta16? PSF component 16stat.fit.paramdoublenullabletheta17? PSF component 17stat.fit.paramdoublenullabletheta18? PSF component 18stat.fit.paramdoublenullabletheta19? PSF component 19stat.fit.paramdoublenullabletheta20? PSF component 20stat.fit.paramdoublenullableJ/A+A/668/A93/visit3Photometry for CHEOPS visit 3 (23 components)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDTime of mid-exposure (BJD)time.epochdoubleFlux[0.99/1.01] Normalized fluxphot.flux;arith.ratiodoublee_Flux[0.0/0.01] Normalized flux uncertaintystat.error;phot.fluxdoubletheta0PSF component 0stat.fit.paramdoubletheta1PSF component 1stat.fit.paramdoubletheta2PSF component 2stat.fit.paramdoubletheta3PSF component 3stat.fit.paramdoubletheta4PSF component 4stat.fit.paramdoubletheta5PSF component 5stat.fit.paramdoubletheta6PSF component 6stat.fit.paramdoubletheta7PSF component 7stat.fit.paramdoubletheta8PSF component 8stat.fit.paramdoubletheta9PSF component 9stat.fit.paramdoubletheta10PSF component 10stat.fit.paramdoubletheta11PSF component 11stat.fit.paramdoubletheta12? PSF component 12stat.fit.paramdoublenullabletheta13? PSF component 13stat.fit.paramdoublenullabletheta14? PSF component 14stat.fit.paramdoublenullabletheta15? PSF component 15stat.fit.paramdoublenullabletheta16? PSF component 16stat.fit.paramdoublenullabletheta17? PSF component 17stat.fit.paramdoublenullabletheta18? PSF component 18stat.fit.paramdoublenullabletheta19? PSF component 19stat.fit.paramdoublenullabletheta20? PSF component 20stat.fit.paramdoublenullabletheta21? PSF component 21stat.fit.paramdoublenullabletheta22? PSF component 22stat.fit.paramdoublenullabletheta23? PSF component 23stat.fit.paramdoublenullableJ/A+A/668/A93/visit4Photometry for CHEOPS visit 4 (19 components)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDTime of mid-exposure (BJD)time.epochdoubleFlux[0.99/1.01] Normalized fluxphot.flux;arith.ratiodoublee_Flux[0.0/0.01] Normalized flux uncertaintystat.error;phot.fluxdoubletheta0PSF component 0stat.fit.paramdoubletheta1PSF component 1stat.fit.paramdoubletheta2PSF component 2stat.fit.paramdoubletheta3PSF component 3stat.fit.paramdoubletheta4PSF component 4stat.fit.paramdoubletheta5PSF component 5stat.fit.paramdoubletheta6PSF component 6stat.fit.paramdoubletheta7PSF component 7stat.fit.paramdoubletheta8PSF component 8stat.fit.paramdoubletheta9PSF component 9stat.fit.paramdoubletheta10PSF component 10stat.fit.paramdoubletheta11PSF component 11stat.fit.paramdoubletheta12? PSF component 12stat.fit.paramdoublenullabletheta13? PSF component 13stat.fit.paramdoublenullabletheta14? PSF component 14stat.fit.paramdoublenullabletheta15? PSF component 15stat.fit.paramdoublenullabletheta16? PSF component 16stat.fit.paramdoublenullabletheta17? PSF component 17stat.fit.paramdoublenullabletheta18? PSF component 18stat.fit.paramdoublenullabletheta19? PSF component 19stat.fit.paramdoublenullableJ/A+A/668/A93/visit5Photometry for CHEOPS visit 5 (22 components)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDTime of mid-exposure (BJD)time.epochdoubleFlux[0.99/1.01] Normalized fluxphot.flux;arith.ratiodoublee_Flux[0.0/0.01] Normalized flux uncertaintystat.error;phot.fluxdoubletheta0PSF component 0stat.fit.paramdoubletheta1PSF component 1stat.fit.paramdoubletheta2PSF component 2stat.fit.paramdoubletheta3PSF component 3stat.fit.paramdoubletheta4PSF component 4stat.fit.paramdoubletheta5PSF component 5stat.fit.paramdoubletheta6PSF component 6stat.fit.paramdoubletheta7PSF component 7stat.fit.paramdoubletheta8PSF component 8stat.fit.paramdoubletheta9PSF component 9stat.fit.paramdoubletheta10PSF component 10stat.fit.paramdoubletheta11PSF component 11stat.fit.paramdoubletheta12? PSF component 12stat.fit.paramdoublenullabletheta13? PSF component 13stat.fit.paramdoublenullabletheta14? PSF component 14stat.fit.paramdoublenullabletheta15? PSF component 15stat.fit.paramdoublenullabletheta16? PSF component 16stat.fit.paramdoublenullabletheta17? PSF component 17stat.fit.paramdoublenullabletheta18? PSF component 18stat.fit.paramdoublenullabletheta19? PSF component 19stat.fit.paramdoublenullabletheta20? PSF component 20stat.fit.paramdoublenullabletheta21? PSF component 21stat.fit.paramdoublenullabletheta22? PSF component 22stat.fit.paramdoublenullabletheta23? PSF component 23stat.fit.paramdoublenullabletheta24? PSF component 24stat.fit.paramdoublenullabletheta25? PSF component 25stat.fit.paramdoublenullabletheta26? PSF component 26stat.fit.paramdoublenullabletheta27? PSF component 27stat.fit.paramdoublenullableJ/A+A/668/A93/visit6Photometry for CHEOPS visit 6 (11 components)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDTime of mid-exposure (BJD)time.epochdoubleFlux[0.99/1.01] Normalized fluxphot.flux;arith.ratiodoublee_Flux[0.0/0.01] Normalized flux uncertaintystat.error;phot.fluxdoubletheta0PSF component 0stat.fit.paramdoubletheta1PSF component 1stat.fit.paramdoubletheta2PSF component 2stat.fit.paramdoubletheta3PSF component 3stat.fit.paramdoubletheta4PSF component 4stat.fit.paramdoubletheta5PSF component 5stat.fit.paramdoubletheta6PSF component 6stat.fit.paramdoubletheta7PSF component 7stat.fit.paramdoubletheta8PSF component 8stat.fit.paramdoubletheta9PSF component 9stat.fit.paramdoubletheta10PSF component 10stat.fit.paramdoubletheta11PSF component 11stat.fit.paramdoubleJ/A+A/668/A93/visit7Photometry for CHEOPS visit 7 (15 components)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDTime of mid-exposure (BJD)time.epochdoubleFlux[0.99/1.01] Normalized fluxphot.flux;arith.ratiodoublee_Flux[0.0/0.01] Normalized flux uncertaintystat.error;phot.fluxdoubletheta0PSF component 0stat.fit.paramdoubletheta1PSF component 1stat.fit.paramdoubletheta2PSF component 2stat.fit.paramdoubletheta3PSF component 3stat.fit.paramdoubletheta4PSF component 4stat.fit.paramdoubletheta5PSF component 5stat.fit.paramdoubletheta6PSF component 6stat.fit.paramdoubletheta7PSF component 7stat.fit.paramdoubletheta8PSF component 8stat.fit.paramdoubletheta9PSF component 9stat.fit.paramdoubletheta10PSF component 10stat.fit.paramdoubletheta11PSF component 11stat.fit.paramdoubletheta12? PSF component 12stat.fit.paramdoublenullabletheta13? PSF component 13stat.fit.paramdoublenullabletheta14? PSF component 14stat.fit.paramdoublenullabletheta15? PSF component 15stat.fit.paramdoublenullableJ/A+A/668/A93/visit8Photometry for CHEOPS visit 8 (27 components)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDTime of mid-exposure (BJD)time.epochdoubleFlux[0.99/1.01] Normalized fluxphot.flux;arith.ratiodoublee_Flux[0.0/0.01] Normalized flux uncertaintystat.error;phot.fluxdoubletheta0PSF component 0stat.fit.paramdoubletheta1PSF component 1stat.fit.paramdoubletheta2PSF component 2stat.fit.paramdoubletheta25? PSF component 25stat.fit.paramdoublenullabletheta26? PSF component 26stat.fit.paramdoublenullabletheta27? PSF component 27stat.fit.paramdoublenullabletheta3PSF component 3stat.fit.paramdoubletheta4PSF component 4stat.fit.paramdoubletheta5PSF component 5stat.fit.paramdoubletheta6PSF component 6stat.fit.paramdoubletheta7PSF component 7stat.fit.paramdoubletheta8PSF component 8stat.fit.paramdoubletheta9PSF component 9stat.fit.paramdoubletheta10PSF component 10stat.fit.paramdoubletheta11PSF component 11stat.fit.paramdoubletheta12? PSF component 12stat.fit.paramdoublenullabletheta13? PSF component 13stat.fit.paramdoublenullabletheta14? PSF component 14stat.fit.paramdoublenullabletheta15? PSF component 15stat.fit.paramdoublenullabletheta16? PSF component 16stat.fit.paramdoublenullabletheta17? PSF component 17stat.fit.paramdoublenullabletheta18? PSF component 18stat.fit.paramdoublenullabletheta19? PSF component 19stat.fit.paramdoublenullabletheta20? PSF component 20stat.fit.paramdoublenullabletheta21? PSF component 21stat.fit.paramdoublenullabletheta22? PSF component 22stat.fit.paramdoublenullabletheta23? PSF component 23stat.fit.paramdoublenullabletheta24? PSF component 24stat.fit.paramdoublenullable