J/ApJ/872/199ivo://CDS.VizieR/J/ApJ/872/199doi:10.26093/cds/vizier.18720199CDSCalamida A.Matheson T.Saha A.Olszewski E.Narayan G.Claver J.,Shanahan C.Holberg J.Axelrod T.Bohlin R.Stubbs C.W.Deustua S.,Hubeny I.Mackenty J.Points S.Rest A.Sabbi E.2021-09-10T13:47:06Z2020-08-31T07:25:06ZCDS support team

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

cds-question@unistra.frwhite-dwarf-starshst-photometryvisible-astronomyspectroscopystellar-spectral-typesstellar-distanceinfrared-photometrybroad-band-photometryultraviolet-astronomyWe present precise photometry and spectroscopy for 23 candidate spectrophotometric standard white dwarfs. The selected stars are distributed in the Northern hemisphere and around the celestial equator, and are all fainter than r~16.5mag. This network of stars, when established as standards and together with the three Hubble Space Telescope primary CALSPEC white dwarfs, will provide a set of spectrophotometric standards to directly calibrate data products to better than 1%. In future deep photometric surveys and facilities, these new faint standard white dwarfs will have enough signal-to-noise ratio to be measured accurately while still avoiding saturation. They will also fall within the dynamic range of large telescopes and their instruments for the foreseeable future. This paper discusses the provenance of the observational data for our candidate standard stars.2019ApJ...872..199Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/872/199CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/hst : HST Archived Exposures Catalog (STScI, 2007)B/wd : Spectroscopically identified white dwarfs (McCook+, 2014)III/116 : Spectrophotometric Standards (Massey+ 1988)III/235 : Spectroscopically Identified White Dwarfs (McCook+, 2008)V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)I/345 : Gaia DR2 (Gaia Collaboration, 2018)J/AJ/132/1221 : VJHK and SDSS photometry of DA white dwarfs (Holberg+, 2006)J/AJ/135/1239 : Spectral distances to DA white dwarfs (Holberg+, 2008)J/AJ/135/1598 : Optical spectroscopy of type Ia supernovae (Matheson+, 2008)J/A+A/505/441 : UVES/VLT spectra of white dwarfs (Koester+, 2009)J/ApJ/743/138 : Spectroscopic survey of bright white dwarfs (Gianninas+, 2011)J/MNRAS/417/1210 : DA-white dwarfs from SDSS and UKIDSS (Girven+, 2011)J/ApJS/204/5 : SDSS DR7 white dwarf catalog (Kleinman+, 2013)J/A+A/560/A106 : NLTE spectral analysis of white dwarf G191-B2B (Rauch+, 2013)J/A+A/568/A22 : Joint analysis of the SDSS-II and SNLS SNe Ia (Betoule+, 2014)J/ApJS/231/1 : Hot DA WDs grid of synthetic spectra (Levenhagen+, 2017)J/MNRAS/469/2102 : White dwarf population from the SDSS DR12 (Anguiano+, 2017)J/AJ/155/162 : Comparison of IUE and CALSPEC SEDs for 6 WDs (Bohlin+, 2018)J/AJ/157/229 : CALSPEC: WFC3 infrared grism spectrophotometry (Bohlin+, 2019)http://www.stsci.edu/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/calspec :https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/872/199https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/872/199http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/872/199https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/872/199https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/872/199http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/872/199GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/872/199/table4 (Log of the observations collected with the Wide Field Camera 3 (WFC3) on board the Hubble Space Telescope (HST) during cycles 20 and 22)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/872/199/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/872/199/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/872/199/table4?GETtext/xml+votable180.050000true15.8420830.3465830.005555555555555556Cone search capability for table J/ApJ/872/199/candidates (properties of the three HST primary CALSPEC standards and the 23 candidate spectrophotometric standard DA WDs (Table 1), Pan-STARRS1 photometry (Table 2) and GAIA DR2 photometry (Table 3))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/872/199/candidates?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/872/199/candidates?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/872/199/candidates?GETtext/xml+votable180.050000true76.3775541752.831098890.0055555555555555566/992 1890 5438 6339 10935 11522 16299 18020 18023 18790 20472 21257 22012 22711 23789 25289 26180 26535 27220 27223 27652 28026 31150 31405 32680 36781 49087 491011.1796835550914393e-19 7.886974166154988e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/872/199?format=asciiUVOpticalInfrareddefaultJ/ApJ/872/199/table4Log of the observations collected with the Wide Field Camera 3 (WFC3) on board the Hubble Space Telescope (HST) during cycles 20 and 22recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCycle[20/22] HST Cycle numbermeta.id;obsintNameStellar identifiermeta.id;meta.maincharPID[12967/13711] Program identifier (1)meta.id;obsintImageImage nameobs.imagecharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainFilterFiltermeta.id;instr.filtercharTexp[15/680] Exposure timestime.duration;obs.exposureintobsObservation datestime.epoch;obsnullableAperWFC3 aperturephys.angSize;instr.fovcharJ/ApJ/872/199/table5Log of the spectroscopic observationsTelTelescope name (2)meta.id;instr.telcharlaml[3400/3520] Lower range of wavelength in {AA}0.1nmem.wl;stat.minintlamu[6360/8400] Upper range of wavelength in {AA}0.1nmem.wl;stat.maxintRes[7/12] Resolution in {AA} (3)0.1nmspect.resolutionintPA[-153/1000] Position angle (4)degpos.posAngfloatAirmass[1/2.1] Airmassobs.airMassfloatStdFlux standard (5)meta.idcharSlit[1/1.5] Slitarcsecinstr.setupfloatExpExposure timestime.duration;obs.exposurecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharDateUT date of observationtime.epoch;obsnullablef_Date[e] Flag on Date (1)meta.codecharJ/ApJ/872/199/table9Photometry in the WFC3 UVIS and IR filters for the 3 HST primary CALSPEC standards and the 23 candidate standard DAWDs in the AB photometric systemVersionPhotometry software packagephot;meta.softwarecharNameStellar identifier (1)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintF275W[10.4/20.4]? HST/WFC3 F275W band AB magnitudemagphot.mag;em.UV.200-300nmfloatnullablee_F275W[0.001/0.04]? Uncertainty in F275Wmagstat.errorfloatnullableF336W[-0.04/20.1] HST/WFC3 F336W band AB magnitudemagphot.mag;em.opt.Ufloate_F336W[0.001/0.04] Uncertainty in F336Wmagstat.errorfloatF475W[-0.009/19.9] HST/WFC3 F475W band AB magnitudemagphot.mag;em.opt.Bfloate_F475W[0.001/0.007] Uncertainty in F475Wmagstat.errorfloatF625W[-0.02/20.2] HST/WFC3 F625W band AB magnitudemagphot.mag;em.opt.Rfloate_F625W[0.001/0.02] Uncertainty in F625Wmagstat.errorfloatF775W[0.009/20.6] HST/WFC3 F775W band AB magnitudemagphot.mag;em.opt.Ifloate_F775W[0.001/0.01] Uncertainty in F775Wmagstat.errorfloatF160W[-0.02/22] HST/WFC3 F160W band AB magnitudemagphot.mag;em.IR.Hfloate_F160W[0.001/0.03] Uncertainty in F160Wmagstat.errorfloatJ/ApJ/872/199/candidatesproperties of the three HST primary CALSPEC standards and the 23 candidate spectrophotometric standard DA WDs (Table 1), Pan-STARRS1 photometry (Table 2) and GAIA DR2 photometry (Table 3)SimbadNameSimbad column added by the CDSmeta.idchare_zmag[0.002/0.2]? zmag uncertaintymagstat.error;phot.magfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNspNumber of spectroscopic observations for this star (link to Table 5)meta.numberintnullableNameStar namemeta.id;meta.maincharprimaryNhstNumber of HST observations for this star (link to Table 4)meta.numberintnullableANameAlternative namemeta.idcharRAJ2000Hour of right ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000) (1)pos.eq.dec;meta.mainpmRA[-38.5/77] Proper motion in RA (1)mas/yrpos.pm;pos.eq.rafloate_pmRA[0.1/1.5]? pmRA uncertaintymas/yrstat.error;pos.pm;pos.eq.rafloatnullablepmDE[-203/14] Proper motion in DEC (1)mas/yrpos.pm;pos.eq.decdoublee_pmDE[0.1/1]? pmDE uncertaintymas/yrstat.error;pos.pm;pos.eq.decfloatnullableSpTWhite dwarf spectral type (1)src.spTypecharDist[51.9/1833]? Distance (1)pcpos.distance;pos.heliocentricfloatnullablee_Dist[0.2/1248]? Dist uncertaintypcstat.errorfloatnullableTeff[9261/75000]? Effective temperature (2)Kphys.temperature.effectiveintnullablelogg[6.8/8.4]? Log of surface gravity (2)log(cm.s**-2)phys.gravityfloatnullablegmag[12.8/19.9]? PS1 g-band (AB) magnitudemagphot.mag;em.opt.Bfloatnullablee_gmag[0.002/0.04]? gmag uncertaintymagstat.error;phot.magfloatnullablermag[13.2/20.4]? PS1 r-band (AB) magnitudemagphot.mag;em.opt.Rfloatnullablee_rmag[0.001/0.06]? rmag uncertaintymagstat.error;phot.magfloatnullableimag[13.6/20.7]? PS1 i-band (AB) magnitudemagphot.mag;em.opt.Ifloatnullablee_imag[0.002/0.1]? imag uncertaintymagstat.error;phot.magfloatnullablezmag[13.9/20.9]? PS1 z-band (AB) magnitudemagphot.mag;em.opt.IfloatnullableGmag[11.7/20.1] Gaia G-band magnitudemagphot.mag;em.opt.Vfloate_Gmag[0/0.01] Gmag uncertaintymagstat.error;phot.magfloatRPmag[12/20.3] Gaia Rp-band magnitudemagphot.mag;em.opt.Rfloate_RPmag[0.001/0.2] RPmag uncertaintymagstat.error;phot.magfloatBPmag[11.4/19.9] Gaia Rp-band magnitudemagphot.mag;em.opt.Bfloate_BPmag[0.005/0.2] BPmag uncertaintymagstat.error;phot.magfloatGaiaDisplay the Gaia DR2 data (I/345) within 3.5"meta.ref.urlcharPS1Display the PS1 data (II/349) within 0.5"meta.ref.urlcharSloanDisplay the online SDSS DR14 data for the nearest objectmeta.ref.urlchar