J/A+A/669/A64ivo://CDS.VizieR/J/A+A/669/A64doi:10.26093/cds/vizier.36690064CDSDemory B.-O.Sulis S.Meier Valdes E.Delrez L.Brandeker A.Billot N.,Fortier A.Hoyer S.Sousa S.G.Heng K.Lendl M.Krenn A.Morris B.M.,Patel J.A.Alibert Y.Alonso R.Anglada G.Barczy T.Barrado D.,Barros S.C.C.Baumjohann W.Beck M.Beck T.Benz W.Bonfils X.,Broeg C.Buder M.Cabrera J.Charnoz S.Collier Cameron A.Cottard H.,Csizmadia Sz.Davies M.B.Deleuil M.Demangeon O.D.S.Ehrenreich D.,Erikson A.Fossati L.Fridlund M.Gandolfi D.Gillon M.Guedel M.,Isaak K.G.Kiss L.L.Laskar J.Lecavelier des Etangs A.Lovis C.,Luntzer A.Magrin D.Marafatto L.Maxted P.F.L.Nascimbeni V.,Olofsson G.Ottensamer R.Pagano I.Palle E.Peter G.Piotto G.,Pollacco D.Queloz D.Ragazzoni R.Rando N.Ratti F.Rauer H.,Ribas I.Santos N.C.Scandariato G.Segransan D.Simon A.E.,Smith A.M.S.Steller M.Szabo Gy.M.Thomas N.Udry S.Van Grootel V.,Walton N.A.2024-11-28T20:01:53Z2023-01-11T07:41:31ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsphotometryvisible-astronomyPast occultation and phase-curve observations of the ultra-short period super-Earth 55 Cnc e obtained at visible and infrared wavelengths have been challenging to reconcile with a planetary reflection and emission model. In this study, we analyse a set of 41 occultations obtained over a two-year timespan with the CHEOPS satellite. We report the detection of 55 Cnc e's occultation with an average depth of 12+/-3 ppm. We derive a corresponding 2-sigma upper limit on the geometric albedo of A_g_<0.55 once decontaminated from the thermal emission measured by Spitzer at 4.5 microns. CHEOPS's photometric performance enables for the first time the detection of individual occultations of this super-Earth in the visible and identifies short-timescale photometric corrugations likely induced by stellar granulation. We also find a clear 47.3-day sinusoidal pattern in the time-dependent occultation depths that we are unable to relate to stellar noise, nor instrumental systematics but whose planetary origin could be tested with upcoming JWST occultation observations of this iconic super-Earth.2023A&A...669A..64Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/669/A64CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/669/A64https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/669/A64http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/669/A64https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/669/A64https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/669/A64http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/669/A64GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/669/A64/raw55 Cancri CHEOPS raw photometric time-series with detrending variablesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeTime (BJD-2450000) (TDB)dtime.epochdoubleindexedFluxNormalised raw fluxphot.flux;arith.ratiodoublee_Flux1-sigma uncertainty in normalised fluxstat.error;phot.fluxdoublexposNormalised x-centroid positionpos.cartesian.x;instr.detdoubleyposNormalised y-centroid positionpos.cartesian.y;instr.detdoublerollRoll angleradpos.posAngdoublebkgNormalised Backgroundinstr.backgrounddoubleJ/A+A/669/A64/detrend55 Cancri CHEOPS detrended photometric time-seriesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintdTTime from eclipse centerdtime.epochdoubleTimeTime (BJD-2450000) (TDB)dtime.epochdoubleindexedFluxNormalised detrended fluxphot.flux;arith.ratiodoublee_Flux1-sigma uncertainty in normalised detrended fluxstat.error;phot.fluxdouble