J/A+A/608/L8ivo://CDS.VizieR/J/A+A/608/L8doi:10.26093/cds/vizier.36089008CDSMaiz Apellaniz J.2017-12-15T18:20:32Z2017-12-15T09:18:36ZCDS support team

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

cds-question@unistra.frsurveysvisible-astronomynarrow-band-photometryOn September 2016 the first data from Gaia were released (DR1). The first release included photometry for over 109 sources in the very broad G system. To test the correspondence between G magnitudes in DR1 and the synthetic equivalents derived using spectral energy distributions from observed and model spectrophotometry. To correct the G passband curve and to measure the zero point in the Vega system. Methods. I have computed the synthetic G and Tycho-2 BTVT photometry for a sample of stars using the Next Generation Spectral Library (NGSL) and the Hubble Space Telescope (HST) CALSPEC spectroscopic standards. I have found that the nominal G passband curve is too blue for the DR1 photometry, as shown by the presence of a color with an exponent of 0.783 eliminates the color term. The corrected passband has a Vega zero point of 0.070+/-0.004 magnitudes.2017A&A...608L...8Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/608/L8CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/337 : Gaia DR1 (Gaia Collaboration, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/608/L8https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/608/L8http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/608/L8https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/608/L8https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/608/L8http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/608/L8GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/608/L8/table2 (Stars used for the correction)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/608/L8/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/608/L8/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/608/L8/table2?GETtext/xml+votable180.050000true7.97404167-5.261919440.0055555555555555566/2678 3266 4298 4322 4512 4820 6601 7240 7710 8009 10194 10197 10202 11017 11197 12644 12934 13148 14875 15097 16016 17955 18028 18425 18990 19099 19192 19448 19924 20532 20716 20804 21269 21389 22184 22205 22211 22558 22868 23592 24472 24839 24866 25607 26110 26304 27143 28252 29769 30064 30175 30188 30304 30315 30330 30374 30404 30411 30434 30450 30456 30659 30970 31101 31752 31757 31760 31769 31795 31805 33018 34171 35813 36221 37843 39413 39745 40337 44499 44771 45837 47337 49142https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/608/L8?format=asciiOpticaldefaultJ/A+A/608/L8/table1Nominal and corrected total-system passbandsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelengthnmem.wlintNominalNominal total-system passbandinstr.bandpassdoubleCorrectedCorrected total-system passbandinstr.bandpassdoubleJ/A+A/608/L8/table2Stars used for the correctionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar namemeta.id;meta.maincharIDGaia DR1 identification (source_id)meta.idRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainFlag[NC] SED source (N: NGSL, C: CALSPEC) (1)meta.code.errorcharSimbadSimbad column added by the CDSmeta.ref.urlchar