J/ApJS/230/16ivo://CDS.VizieR/J/ApJS/230/16doi:10.26093/cds/vizier.22300016CDSKesseli A.Y.West A.A.Veyette M.Harrison B.Feldman D.,Bochanski J.J.2026-03-03T20:03:01Z2017-09-05T07:25:59ZCDS support team

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

cds-question@unistra.frstellar-spectral-typesspectroscopysurveysvisible-astronomysloan-photometryWe present a library of empirical stellar spectra created using spectra from the Sloan Digital Sky Survey's Baryon Oscillation Spectroscopic Survey. The templates cover spectral types O5 through L3, are binned by metallicity from -2.0dex through +1.0dex, and are separated into main-sequence (dwarf) stars and giant stars. With recently developed M dwarf metallicity indicators, we are able to extend the metallicity bins down through the spectral subtype M8, making this the first empirical library with this degree of temperature and metallicity coverage. The wavelength coverage for the templates is from 3650 to 10200{AA} at a resolution of better than R~2000. Using the templates, we identify trends in color space with metallicity and surface gravity, which will be useful for analyzing large data sets from upcoming missions like the Large Synoptic Survey Telescope. Along with the templates, we are releasing a code for automatically (and/or visually) identifying the spectral type and metallicity of a star.2017ApJS..230...16Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/230/16CatalogResearchIsServedByTAP VizieR generic servicerelated-toVI/39 : Model Atmospheres (Kurucz, 1979)III/218 : ELODIE archive (Prugniel+, 2001)II/282 : The SDSS Photometric Catalog, Release 6 (Adelman-McCarthy+, 2007)V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)J/PASP/110/863 : A Stellar Spectral Flux Library: 1150 - 25000 A (Pickles 1998)J/AJ/117/981 : Estimation of stellar metal abundance. II. (Beers+, 1999)J/AJ/117/2308 : Spectroscopy of hot stars in the halo (Wilhelm+, 1999)J/AJ/123/3409 : SDSS M, L, and T dwarfs (Hawley+, 2002)J/AJ/125/2502 : Spectral indices of Galactic halo (Morrison+, 2003)J/AJ/134/2398 : Stellar SEDs in SDSS and 2MASS filters (Covey+, 2007)J/AJ/136/2050 : SEGUE stellar parameter pipeline. II. (Lee+, 2008)J/AJ/141/105 : NIR-matched quasar catalog (Peth+, 2011)J/AJ/141/97 : SDSS DR7 M dwarfs (West+, 2011)J/ApJS/204/5 : SDSS DR7 white dwarf catalog (Kleinman+, 2013)J/AJ/145/52 : Abundances of late K & M dwarfs in bin. systems (Mann+, 2013)J/AJ/147/76 : Photometry of M giant candidates in MW (Bochanski+, 2014)J/AJ/147/20 : Spectroscopy of 447 nearby M dwarfs (Newton+, 2014)J/ApJ/794/146 : M dwarfs with IR excess (Theissen+, 2014)J/ApJ/811/30 : Machine learning metallicity predictions (Miller, 2015)J/AJ/149/158 : The BUD sample. I. L dwarf activity sample (Schmidt+, 2015)http://www.sdss.org/ : SDSS home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/230/16https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/230/16http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/230/16https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/230/16https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/230/16http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/230/16GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJS/230/16/table2The template spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFileNameName of the template file in subdirectory fitsmeta.id;meta.filecharNsp[1/590] Number of coadded spectrameta.numberintVO7912Spectral index, flux in 7900.0-7980.0{AA} divided by 8100.0-8150.0{AA}spect.indexfloatNaDSpectral index, flux in 5880.0-5905.0{AA} divided by 5910.0-5935.0{AA}spect.indexfloatCaH2Spectral index, flux in 6814.0-6845.0{AA} divided by 7042.0-7046.0{AA}spect.indexfloatMgISpectral index, flux in 5152.7-5192.7{AA} divided by 5100.0-5150.0{AA}spect.indexfloatGbandSpectral index, flux in 4285.0-4315.0{AA} divided by 4260.0-4285.0{AA}spect.indexfloatHgamSpectral index, flux in 4332.5-4347.5{AA} divided by 4355.0-4370.0{AA}spect.indexfloatFeHSpectral index, flux in 9880.0-10000.0{AA} divided by 9820.0-9860.0{AA}spect.indexfloatRb-BSpectral index, flux in 7922.6-7932.6 and 7962.6-7972.6{AA} divided by 7942.6-7952.6{AA}spect.indexfloatFeI8689Spectral index, flux in 8684.0-8694.0{AA} divided by 8664.0-8674.0{AA}spect.indexfloatVO7434Spectral index, flux in 7430.0-7470.0{AA} divided by 7550.0-7570.0{AA}spect.indexfloatHbetaSpectral index, flux in 4847.0-4877.0{AA} divided by 4817.0-4847.0{AA}spect.indexfloatFeI4383Spectral index, flux in 4378.6-4388.6{AA} divided by 4355.0-4370.0{AA}spect.indexfloatTiO5Spectral index, flux in 7126.0-7135.0{AA} divided by 7042.0-7046.0{AA}spect.indexfloatCrH-ASpectral index, flux in 8580.0-8600.0{AA} divided by 8621.0-8641.0{AA}spect.indexfloatHalphaSpectral index, flux in 6548.0-6578.0{AA} divided by 6583.0-6613.0{AA}spect.indexfloatVO-BSpectral index, flux in 7860.0-7880.0 and 8080.0-8100.0{AA} divided by 7960.0-8000.0{AA}spect.indexfloatCaII8662Spectral index, flux in 8650.0-8675.0{AA} divided by 8625.0-8650.0{AA}spect.indexfloatCaH3Spectral index, flux in 6960.0-6990.0{AA} divided by 7042.0-7046.0{AA}spect.indexfloatCaI6162Spectral index, flux in 6150.0-6175.0{AA} divided by 6120.0-6145.0{AA}spect.indexfloatTiO8440Spectral index, flux in 8440.0-8470.0{AA} divided by 8400.0-8420.0{AA}spect.indexfloatCaII8498Spectral index, flux in 8483.0-8513.0{AA} divided by 8513.0-8543.0{AA}spect.indexfloatHdelSpectral index, flux in 4086.7-4116.7{AA} divided by 4136.7-4176.7{AA}spect.indexfloatVO7445Spectral index, flux in 7350.0-7400.0 and 7510.0-7560.0{AA} divided by 7420.0-7470.0{AA}spect.indexfloatNaISpectral index, flux in 8177.0-8201.0{AA} divided by 8151.0-8175.0{AA}spect.indexfloatCaKSpectral index, flux in 3923.7-3943.7{AA} divided by 3943.7-3953.7{AA}spect.indexfloatCaI4227Spectral index, flux in 4216.7-4236.7{AA} divided by 4236.7-4256.7{AA}spect.indexfloatFeI4404Spectral index, flux in 4399.8-4409.8{AA} divided by 4414.8-4424.8{AA}spect.indexfloatCs-ASpectral index, flux in 8496.1-8506.1 and 8536.1-8546.1, 0.5{AA} divided by 8516.1-8526.1{AA}spect.indexfloatTiO8Spectral index, flux in 8400.0-8415.0{AA} divided by 8455.0-8470.0{AA}spect.indexfloatJ/ApJS/230/16/table3Photometry of templates[Fe/H][-2/1]? Metallicity bin (1)phys.abundfloatnullableLumLuminosity class (III or V)src.class.luminositycharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpTMK spectral type (O5 through L6)src.spTypecharu-g[-0.5/3]? template u-g color indexmagphot.color;em.opt.U;em.opt.Bfloatnullableu-grms[0/0.3]? RMS scatter in u-g template color indexmagstat.errorfloatnullablee_u-g[0/0.2]? Uncertainty in u-gmagstat.errorfloatnullableg-r[-0.6/1.7]? template g-r color indexmagphot.color;em.opt.B;em.opt.Rfloatnullableg-rrms[0/0.3]? RMS scatter in g-r template color indexmagstat.errorfloatnullablee_g-r[0/0.05]? Uncertainty in g-rmagstat.error;phot.color;em.opt.Bfloatnullabler-i[-0.4/2.7]? template r-i color indexmagphot.color;em.opt.R;em.opt.Ifloatnullabler-irms[0/0.2]? RMS scatter in r-i template color indexmagstat.errorfloatnullablee_r-i[0/0.06]? Uncertainty in r-imagstat.error;phot.color;em.opt.Rfloatnullablei-z[-0.4/2.3]? template i-z color indexmagphot.color;em.opt.I;em.opt.Ifloatnullablei-zrms[0/0.08]? RMS scatter in i-z template color indexmagstat.errorfloatnullablee_i-z[0/0.09]? Uncertainty in i-zmagstat.errorfloatnullable