J/A+A/617/A138ivo://CDS.VizieR/J/A+A/617/A138doi:10.26093/cds/vizier.36170138CDSWeiler M.2018-11-22T07:35:58Z2018-10-02T09:08:21ZCDS support team

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

cds-question@unistra.frphotometryThe European Space Agency mission Gaia has published with its second data release (DR2, Cat. I/345) a catalogue of photometric measurements for more than 1.3 billion astronomical objects in three passbands. The precision of the measurements in these passbands, denoted G, G_BP_, and G_RP_, reaches down to the milli-magnitude level. The scientific exploitation of this data set requires precise knowledge on the response curves of the three passbands. This work aims for improving the exploitation of the photometric data by deriving an improved set of response curves for the three passbands, allowing for an accurate computation of synthetic Gaia photometry. This is achieved by formulating the problem of passband determination in a functional analytic formalism, and linking the photometric measurements with four observational, one empirical and one theoretical spectral library. We present response curves for G, G_BP_, and G_RP_ that differ from the previously published curves, and which provide a better agreement between synthetic Gaia photometry and Gaia observations.2018A&A...617A.138Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/617/A138CatalogResearchIsServedByTAP VizieR generic servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)J/A+A/619/A180 : Gaia DR2 photometric sensitivity curves (Maiz Apellaniz+ 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/617/A138https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/617/A138http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/617/A138https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/617/A138https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/617/A138http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/617/A138GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/617/A138/table2G, BP (bright), BP (faint), and RP passbands, separated into the parallel and orthogonal componentsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in nmnmem.wlfloatGparParallel component of G passbandphys.transmission;instr.filterdoubleGortOrthogonal component of G passbandphys.transmission;instr.filterdoubleGBPbparParallel component of G_BP_ (bright) passbandphys.transmission;instr.filterdoubleGBPbortOrthogonal component of G_BP_ (bright) passbandphys.transmission;instr.filterdoubleGBPfparParallel component of G_BP_ (faint) passbandphys.transmission;instr.filterdoubleGBPfortOrthogonal component of G_BP_ (faint) passbandphys.transmission;instr.filterdoubleGRPparParallel component of G_RP_ passbandphys.transmission;instr.filterdoubleGRPortOrthogonal component of G_RP_ passbandphys.transmission;instr.filterdouble