J/MNRAS/521/5636ivo://CDS.VizieR/J/MNRAS/521/5636doi:10.26093/cds/vizier.75215636CDSAhrer E.Wheatley P.J.Gandhi S.Kirk J.King G.W.Louden T.,Welbanks L.2024-08-22T20:17:10Z2023-04-27T09:12:38ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsvisible-astronomyspectroscopyWe have performed low-resolution ground-based spectroscopy of HATS-46 b in transmission, using the EFOSC2 instrument on the ESO New Technology Telescope (NTT). HATS-46 b is a highly inflated exoplanet that is a prime target for transmission spectroscopy, having a Jupiter-like radius (0.95R_Jup_) but a much lower mass (0.16M_Jup_). It orbits a G-type star with a 4.7d period, giving an equilibrium temperature of 1100K. We observed one transit of HATS-46 b with the NTT, with the time-series spectra covering a wavelength range of 3900-9000{AA} at a resolution (R) of ~380. We achieved a remarkably precise transmission spectrum of 1.03 x photon noise, with a median uncertainty of 357ppm for ~200{AA}-wide bins, despite the relative faintness of the host star with Vmag=13.6. The transmission spectrum does not show strong absorption features and retrievals favour a cloudy model, ruling out a clear atmosphere with 3.0{sigma} confidence. We also place a conservative upper limit on the sodium abundance under the alternative scenario of a clear atmosphere. This is the eighth planet in the LRG-BEASTS (Low-Resolution Ground-Based Exoplanet Atmosphere Survey using Transmission Spectroscopy) survey, which uses 4 m-class telescopes such as the NTT to obtain low-resolution transmission spectra of hot Jupiters with precisions of around one atmospheric scale height.2023MNRAS.521.5636Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/521/5636CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/AJ/155/112 : Radial velocities + light curves for HATS-43 - HATS-46https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/521/5636https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/521/5636http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/521/5636https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/521/5636https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/521/5636http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/521/5636GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/MNRAS/521/5636/lcWavelength binned and white-light light curves of the transit of HATS-46brecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeTime in MJDdtime.epochdoubleFWLNormalised white-light flux (3900-9000{AA})phot.flux;arith.ratiodoublee_FWLError in white-light flux (3900-9000{AA})stat.errordoubleFWB01Normalised flux in 300{AA}-wide bin centred on 4050{AA}phot.flux;arith.ratiodoublee_FWB01Error in flux in 300{AA}-wide bin centred on 4050{AA}stat.errordoubleFWB02Normalised flux in 240{AA}-wide bin centred on 4320{AA}phot.flux;arith.ratiodoublee_FWB02Error in flux in 240{AA}-wide bin centred on 4320{AA}stat.errordoubleFWB03Normalised flux in 240{AA}-wide bin centred on 4560{AA}phot.flux;arith.ratiodoublee_FWB03Error in flux in 240{AA}-wide bin centred on 4560{AA}stat.errordoubleFWB04Normalised flux in 230{AA}-wide bin centred on 4795{AA}phot.flux;arith.ratiodoublee_FWB04Error in flux in 230{AA}-wide bin centred on 4795{AA}stat.errordoubleFWB05Normalised flux in 210{AA}-wide bin centred on 5015{AA}phot.flux;arith.ratiodoublee_FWB05Error in flux in 210{AA}-wide bin centred on 5015{AA}stat.errordoubleFWB06Normalised flux in 230{AA}-wide bin centred on 5235{AA}phot.flux;arith.ratiodoublee_FWB16Error in flux in 220{AA}-wide bin centred on 6930{AA}stat.errordoubleFWB17Normalised flux in 200{AA}-wide bin centred on 7140{AA}phot.flux;arith.ratiodoublee_FWB17Error in flux in 200{AA}-wide bin centred on 7140{AA}stat.errordoubleFWB18Normalised flux in 200{AA}-wide bin centred on 7340{AA}phot.flux;arith.ratiodoublee_FWB18Error in flux in 200{AA}-wide bin centred on 7340{AA}stat.errordoubleFWB19Normalised flux in 209{AA}-wide bin centred on 7544{AA}phot.flux;arith.ratiodoublee_FWB19Error in flux in 209{AA}-wide bin centred on 7544{AA}stat.errordoubleFWB20Normalised flux in 100{AA}-wide bin centred on 7699{AA}phot.flux;arith.ratiodoublee_FWB20Error in flux in 100{AA}-wide bin centred on 7699{AA}stat.errordoubleFWB21Normalised flux in 201{AA}-wide bin centred on 7849{AA}phot.flux;arith.ratiodoublee_FWB21Error in flux in 201{AA}-wide bin centred on 7849{AA}stat.errordoubleFWB22Normalised flux in 200{AA}-wide bin centred on 8050{AA}phot.flux;arith.ratiodoublee_FWB22Error in flux in 200{AA}-wide bin centred on 8050{AA}stat.errordoubleFWB23Normalised flux in 200{AA}-wide bin centred on 8250{AA}phot.flux;arith.ratiodoublee_FWB23Error in flux in 200{AA}-wide bin centred on 8250{AA}stat.errordoubleFWB24Normalised flux in 200{AA}-wide bin centred on 8450{AA}phot.flux;arith.ratiodoublee_FWB24Error in flux in 200{AA}-wide bin centred on 8450{AA}stat.errordoubleFWB25Normalised flux in 220{AA}-wide bin centred on 8660{AA}phot.flux;arith.ratiodoublee_FWB25Error in flux in 220{AA}-wide bin centred on 8660{AA}stat.errordoubleFWB26Normalised flux in 230{AA}-wide bin centred on 8885{AA}phot.flux;arith.ratiodoublee_FWB26Error in flux in 230{AA}-wide bin centred on 8885{AA}stat.errordoublee_FWB06Error in flux in 230{AA}-wide bin centred on 5235{AA}stat.errordoubleFWB07Normalised flux in 220{AA}-wide bin centred on 5460{AA}phot.flux;arith.ratiodoublee_FWB07Error in flux in 220{AA}-wide bin centred on 5460{AA}stat.errordoubleFWB08Normalised flux in 248{AA}-wide bin centred on 5694{AA}phot.flux;arith.ratiodoublee_FWB08Error in flux in 248{AA}-wide bin centred on 5694{AA}stat.errordoubleFWB09Normalised flux in 50{AA}-wide bin centred on 5843{AA}phot.flux;arith.ratiodoublee_FWB09Error in flux in 50{AA}-wide bin centred on 5843{AA}stat.errordoubleFWB10Normalised flux in 50{AA}-wide bin centred on 5893{AA}phot.flux;arith.ratiodoublee_FWB10Error in flux in 50{AA}-wide bin centred on 5893{AA}stat.errordoubleFWB11Normalised flux in 50{AA}-wide bin centred on 5943{AA}phot.flux;arith.ratiodoublee_FWB11Error in flux in 50{AA}-wide bin centred on 5943{AA}stat.errordoubleFWB12Normalised flux in 222{AA}-wide bin centred on 6079{AA}phot.flux;arith.ratiodoublee_FWB12Error in flux in 222{AA}-wide bin centred on 6079{AA}stat.errordoubleFWB13Normalised flux in 210{AA}-wide bin centred on 6295{AA}phot.flux;arith.ratiodoublee_FWB13Error in flux in 210{AA}-wide bin centred on 6295{AA}stat.errordoubleFWB14Normalised flux in 210{AA}-wide bin centred on 6505{AA}phot.flux;arith.ratiodoublee_FWB14Error in flux in 210{AA}-wide bin centred on 6505{AA}stat.errordoubleFWB15Normalised flux in 210{AA}-wide bin centred on 6715{AA}phot.flux;arith.ratiodoublee_FWB15Error in flux in 210{AA}-wide bin centred on 6715{AA}stat.errordoubleFWB16Normalised flux in 220{AA}-wide bin centred on 6930{AA}phot.flux;arith.ratiodouble