J/A+A/594/A65ivo://CDS.VizieR/J/A+A/594/A65doi:10.26093/cds/vizier.35940065CDSNortmann L.Palle E.Murgas F.Dreizler S.Iro N.Cabrera-Lavers A.2017-06-21T08:22:07Z2016-10-14T08:42:01ZCDS support team

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

cds-question@unistra.frmultiple-starssolar-system-planetsspectroscopyWe observed the hot Jupiter HAT-P-32b (also known as HAT-P-32Ab) to determine its optical transmission spectrum by measuring the wavelength-dependent, planet-to-star radius ratios in the region between 518-918nm. We used the OSIRIS instrument at the Gran Telescopio CANARIAS (GTC) in long-slit spectroscopy mode, placing HAT-P-32 and a reference star in the same slit and obtaining a time series of spectra covering two transit events. Using the best quality data set, we were able to yield 20 narrowband transit light curves, with each passband spanning a 20nm wide interval. After removal of all systematic noise signals and light curve modeling, the uncertainties for the resulting radius ratios lie between 337 and 972ppm. The radius ratios show little variation with wavelength, suggesting a high altitude cloud layer masking any atmospheric features. Alternatively, a strong depletion in alkali metals or a much smaller than expected planetary atmospheric scale height could be responsible for the lack of atmospheric features. Our result of a flat transmission spectrum is consistent with a previous ground-based study of the optical spectrum of this planet. This agreement between independent results demonstrates that ground-based measurements of exoplanet atmospheres can give reliable and reproducible results despite the fact that the data often is heavily affected by systematic noise as long as the noise source is well understood and properly corrected.2016A&A...594A..65Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/594/A65CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/563/A41 : WASP-43 OSIRIS transmission spectroscopy (Murgas+, 2014)J/A+A/589/A62 : GTC transit light curves of CoRoT-29b (Palle+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/594/A65https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/594/A65http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/594/A65https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/594/A65https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/594/A65http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/594/A65GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/594/A65/wlc_run1HAT-P-32 GTC transit white light curve Run 1 and auxiliary parameters (2012/09/15)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian Date (TDB standard)dtime.epochdoubleFluxRelative fluxphot.flux;arith.ratiodoublee_FluxRelative flux standard deviationstat.error;phot.fluxdoublecnDilution by optical companionarith.factor;phot.fluxdoublee_cnError of dilution by optical companionstat.errordoubleYposDrift of star on CCD chip in dispersion directionpos.cartesian.y;instr.detdoubleXposDrift of star on CCD chip in spatial directionpos.cartesian.x;instr.detdoubleAirmAirmass during observationobs.airMassdoubleFWHMFull width at half maximum of the stellar spatial profilespect.line.widthdoubleJ/A+A/594/A65/ch14HAT-P-32 GTC narrowband channel (778-798nm) light curves of Run 2 (2012/09/30)recnoRecord number assigned by the VizieR team. 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Should Not be used for identification.meta.recordintb_wlLower wavelength limit of the narrowband channelnmem.wl;stat.minintB_wlUpper wavelength limit of the narrowband channelnmem.wl;stat.maxintBJDBarycentric Julian Date (TDB standard)dtime.epochdoubleFluxRelative fluxphot.flux;arith.ratiodoublee_FluxRelative flux standard deviationstat.error;phot.fluxdoublecnDilution by optical companionarith.factor;phot.fluxdoublee_cnError of dilution by optical companionstat.errordoubleJ/A+A/594/A65/ch11HAT-P-32 GTC narrowband channel (718-738nm) light curves of Run 2 (2012/09/30)recnoRecord number assigned by the VizieR team. 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Should Not be used for identification.meta.recordintb_wlLower wavelength limit of the narrowband channelnmem.wl;stat.minintB_wlUpper wavelength limit of the narrowband channelnmem.wl;stat.maxintBJDBarycentric Julian Date (TDB standard)dtime.epochdoubleFluxRelative fluxphot.flux;arith.ratiodoublee_FluxRelative flux standard deviationstat.error;phot.fluxdoublecnDilution by optical companionarith.factor;phot.fluxdoublee_cnError of dilution by optical companionstat.errordoubleJ/A+A/594/A65/ch18HAT-P-32 GTC narrowband channel (858-878nm) light curves of Run 2 (2012/09/30)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintb_wlLower wavelength limit of the narrowband channelnmem.wl;stat.minintB_wlUpper wavelength limit of the narrowband channelnmem.wl;stat.maxintBJDBarycentric Julian Date (TDB standard)dtime.epochdoubleFluxRelative fluxphot.flux;arith.ratiodoublee_FluxRelative flux standard deviationstat.error;phot.fluxdoublecnDilution by optical companionarith.factor;phot.fluxdoublee_cnError of dilution by optical companionstat.errordoubleJ/A+A/594/A65/ch16HAT-P-32 GTC narrowband channel (818-838nm) light curves of Run 2 (2012/09/30)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintb_wlLower wavelength limit of the narrowband channelnmem.wl;stat.minintB_wlUpper wavelength limit of the narrowband channelnmem.wl;stat.maxintBJDBarycentric Julian Date (TDB standard)dtime.epochdoubleFluxRelative fluxphot.flux;arith.ratiodoublee_FluxRelative flux standard deviationstat.error;phot.fluxdoublecnDilution by optical companionarith.factor;phot.fluxdoublee_cnError of dilution by optical companionstat.errordoubleJ/A+A/594/A65/ch15HAT-P-32 GTC narrowband channel (798-818nm) light curves of Run 2 (2012/09/30)recnoRecord number assigned by the VizieR team. 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Should Not be used for identification.meta.recordintb_wlLower wavelength limit of the narrowband channelnmem.wl;stat.minintB_wlUpper wavelength limit of the narrowband channelnmem.wl;stat.maxintBJDBarycentric Julian Date (TDB standard)dtime.epochdoublee_FluxRelative flux standard deviationstat.error;phot.fluxdoublecnDilution by optical companionarith.factor;phot.fluxdoublee_cnError of dilution by optical companionstat.errordoubleJ/A+A/594/A65/ch05HAT-P-32 GTC narrowband channel (598-618nm) light curves of Run 2 (2012/09/30)e_FluxRelative flux standard deviationstat.error;phot.fluxdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintb_wlLower wavelength limit of the narrowband channelnmem.wl;stat.minintB_wlUpper wavelength limit of the narrowband channelnmem.wl;stat.maxintBJDBarycentric Julian Date (TDB standard)dtime.epochdoubleFluxRelative fluxphot.flux;arith.ratiodoublecnDilution by optical companionarith.factor;phot.fluxdoublee_cnError of dilution by optical companionstat.errordoubleJ/A+A/594/A65/ch04HAT-P-32 GTC narrowband channel (578-598nm) light curves of Run 2 (2012/09/30)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintb_wlLower wavelength limit of the narrowband channelnmem.wl;stat.minintB_wlUpper wavelength limit of the narrowband channelnmem.wl;stat.maxintBJDBarycentric Julian Date (TDB standard)dtime.epochdoubleFluxRelative fluxphot.flux;arith.ratiodoublee_FluxRelative flux standard deviationstat.error;phot.fluxdoublecnDilution by optical companionarith.factor;phot.fluxdoublee_cnError of dilution by optical companionstat.errordoubleJ/A+A/594/A65/ch19HAT-P-32 GTC narrowband channel (878-898nm) light curves of Run 2 (2012/09/30)FluxRelative fluxphot.flux;arith.ratiodoublerecnoRecord number assigned by the VizieR team. 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Should Not be used for identification.meta.recordintb_wlLower wavelength limit of the narrowband channelnmem.wl;stat.minintB_wlUpper wavelength limit of the narrowband channelnmem.wl;stat.maxintBJDBarycentric Julian Date (TDB standard)dtime.epochdoubleFluxRelative fluxphot.flux;arith.ratiodoublee_FluxRelative flux standard deviationstat.error;phot.fluxdoublecnDilution by optical companionarith.factor;phot.fluxdoublee_cnError of dilution by optical companionstat.errordoubleJ/A+A/594/A65/ch09HAT-P-32 GTC narrowband channel (678-698nm) light curves of Run 2 (2012/09/30)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintb_wlLower wavelength limit of the narrowband channelnmem.wl;stat.minintB_wlUpper wavelength limit of the narrowband channelnmem.wl;stat.maxintBJDBarycentric Julian Date (TDB standard)dtime.epochdoubleFluxRelative fluxphot.flux;arith.ratiodoublee_FluxRelative flux standard deviationstat.error;phot.fluxdoublecnDilution by optical companionarith.factor;phot.fluxdoublee_cnError of dilution by optical companionstat.errordoubleJ/A+A/594/A65/ch06HAT-P-32 GTC narrowband channel (618-638nm) light curves of Run 2 (2012/09/30)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintb_wlLower wavelength limit of the narrowband channelnmem.wl;stat.minintB_wlUpper wavelength limit of the narrowband channelnmem.wl;stat.maxintBJDBarycentric Julian Date (TDB standard)dtime.epochdoubleFluxRelative fluxphot.flux;arith.ratiodoublee_FluxRelative flux standard deviationstat.error;phot.fluxdoublecnDilution by optical companionarith.factor;phot.fluxdoublee_cnError of dilution by optical companionstat.errordoubleJ/A+A/594/A65/ch10HAT-P-32 GTC narrowband channel (698-718mn) light curves of Run 2 (2012/09/30)FluxRelative fluxphot.flux;arith.ratiodoublerecnoRecord number assigned by the VizieR team. 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Should Not be used for identification.meta.recordintb_wlLower wavelength limit of the narrowband channelnmem.wl;stat.minintB_wlUpper wavelength limit of the narrowband channelnmem.wl;stat.maxintBJDBarycentric Julian Date (TDB standard)dtime.epochdoubleFluxRelative fluxphot.flux;arith.ratiodoublee_FluxRelative flux standard deviationstat.error;phot.fluxdoublecnDilution by optical companionarith.factor;phot.fluxdoublee_cnError of dilution by optical companionstat.errordoubleJ/A+A/594/A65/ch13HAT-P-32 GTC narrowband channel (758-778nm) light curves of Run 2 (2012/09/30)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintb_wlLower wavelength limit of the narrowband channelnmem.wl;stat.minintB_wlUpper wavelength limit of the narrowband channelnmem.wl;stat.maxintBJDBarycentric Julian Date (TDB standard)dtime.epochdoubleFluxRelative fluxphot.flux;arith.ratiodoublee_FluxRelative flux standard deviationstat.error;phot.fluxdoublecnDilution by optical companionarith.factor;phot.fluxdoublee_cnError of dilution by optical companionstat.errordoubleJ/A+A/594/A65/ch02HAT-P-32 GTC narrowband channel (538-558nm) light curves of Run 2 (2012/09/30)FluxRelative fluxphot.flux;arith.ratiodoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintb_wlLower wavelength limit of the narrowband channelnmem.wl;stat.minintB_wlUpper wavelength limit of the narrowband channelnmem.wl;stat.maxintBJDBarycentric Julian Date (TDB standard)dtime.epochdoublee_FluxRelative flux standard deviationstat.error;phot.fluxdoublecnDilution by optical companionarith.factor;phot.fluxdoublee_cnError of dilution by optical companionstat.errordouble