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J/ApJS/230/16 05 through L3 empirical stellar spectra from SDSS (Kesseli+, 2017)

An empirical template library of stellar spectra for a wide range of spectral classes, luminosity classes, and metallicities using SDSS BOSS spectra. Kesseli A.Y., West A.A., Veyette M., Harrison B., Feldman D., Bochanski J.J. <Astrophys. J. Suppl. Ser., 230, 16-16 (2017)> =2017ApJS..230...16K (SIMBAD/NED BibCode)
ADC_Keywords: Spectral types ; Spectroscopy ; Surveys ; Photometry, SDSS Keywords: catalogs; stars: abundances; stars: fundamental parameters; stars: general; techniques: spectroscopic Abstract: We 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 10200Å 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. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 198 323 The template spectra table3.dat 99 329 Photometry of templates fits/* 0 324 Individual template spectra in FITS format
See also: VI/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) : SDSS home page Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 18 A18 --- FileName Name of the template file in subdirectory fits 20- 22 I3 --- Nsp [1/590] Number of coadded spectra 24- 28 F5.3 --- VO7912 Spectral index, flux in 7900.0-7980.0Å divided by 8100.0-8150.0Å 30- 34 F5.3 --- NaD Spectral index, flux in 5880.0-5905.0Å divided by 5910.0-5935.0Å 36- 40 F5.3 --- CaH2 Spectral index, flux in 6814.0-6845.0Å divided by 7042.0-7046.0Å 42- 46 F5.3 --- MgI Spectral index, flux in 5152.7-5192.7Å divided by 5100.0-5150.0Å 48- 52 F5.3 --- Gband Spectral index, flux in 4285.0-4315.0Å divided by 4260.0-4285.0Å 54- 58 F5.3 --- Hgam Spectral index, flux in 4332.5-4347.5Å divided by 4355.0-4370.0Å 60- 64 F5.3 --- FeH Spectral index, flux in 9880.0-10000.0Å divided by 9820.0-9860.0Å 66- 70 F5.3 --- Rb-B Spectral index, flux in 7922.6-7932.6 and 7962.6-7972.6Å divided by 7942.6-7952.6Å 72- 76 F5.3 --- FeI8689 Spectral index, flux in 8684.0-8694.0Å divided by 8664.0-8674.0Å 78- 82 F5.3 --- VO7434 Spectral index, flux in 7430.0-7470.0Å divided by 7550.0-7570.0Å 84- 88 F5.3 --- Hbeta Spectral index, flux in 4847.0-4877.0Å divided by 4817.0-4847.0Å 90- 95 F6.3 --- FeI4383 Spectral index, flux in 4378.6-4388.6Å divided by 4355.0-4370.0Å 97-101 F5.3 --- TiO5 Spectral index, flux in 7126.0-7135.0Å divided by 7042.0-7046.0Å 103-107 F5.3 --- CrH-A Spectral index, flux in 8580.0-8600.0Å divided by 8621.0-8641.0Å 109-113 F5.3 --- Halpha Spectral index, flux in 6548.0-6578.0Å divided by 6583.0-6613.0Å 115-119 F5.3 --- VO-B Spectral index, flux in 7860.0-7880.0 and 8080.0-8100.0Å divided by 7960.0-8000.0Å 121-125 F5.3 --- CaII8662 Spectral index, flux in 8650.0-8675.0Å divided by 8625.0-8650.0Å 127-131 F5.3 --- CaH3 Spectral index, flux in 6960.0-6990.0Å divided by 7042.0-7046.0Å 133-137 F5.3 --- CaI6162 Spectral index, flux in 6150.0-6175.0Å divided by 6120.0-6145.0Å 139-143 F5.3 --- TiO8440 Spectral index, flux in 8440.0-8470.0Å divided by 8400.0-8420.0Å 145-149 F5.3 --- CaII8498 Spectral index, flux in 8483.0-8513.0Å divided by 8513.0-8543.0Å 151-156 F6.3 --- Hdel Spectral index, flux in 4086.7-4116.7Å divided by 4136.7-4176.7Å 158-162 F5.3 --- VO7445 Spectral index, flux in 7350.0-7400.0 and 7510.0-7560.0Å divided by 7420.0-7470.0Å 164-168 F5.3 --- NaI Spectral index, flux in 8177.0-8201.0Å divided by 8151.0-8175.0Å 170-174 F5.3 --- CaK Spectral index, flux in 3923.7-3943.7Å divided by 3943.7-3953.7Å 176-180 F5.3 --- CaI4227 Spectral index, flux in 4216.7-4236.7Å divided by 4236.7-4256.7Å 182-186 F5.3 --- FeI4404 Spectral index, flux in 4399.8-4409.8Å divided by 4414.8-4424.8Å 188-192 F5.3 --- Cs-A Spectral index, flux in 8496.1-8506.1 and 8536.1-8546.1, 0.5Å divided by 8516.1-8526.1Å 194-198 F5.3 --- TiO8 Spectral index, flux in 8400.0-8415.0Å divided by 8455.0-8470.0Å
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 2 A2 --- SpT MK spectral type (O5 through L6) 4- 7 F4.1 --- [Fe/H] [-2/1]? Metallicity bin (1) 9- 11 A3 --- Lum Luminosity class (III or V) 13- 17 F5.2 mag u-g [-0.5/3]? template u-g color index 19- 25 F7.2 mag u-grms [0/0.3]?=-999 RMS scatter in u-g template color index 27- 33 F7.2 mag e_u-g [0/0.2]?=-999 Uncertainty in u-g 35- 39 F5.2 mag g-r [-0.6/1.7]? template g-r color index 41- 47 F7.2 mag g-rrms [0/0.3]?=-999 RMS scatter in g-r template color index 49- 55 F7.2 mag e_g-r [0/0.05]?=-999 Uncertainty in g-r 57- 61 F5.2 mag r-i [-0.4/2.7]? template r-i color index 63- 69 F7.2 mag r-irms [0/0.2]?=-999 RMS scatter in r-i template color index 71- 77 F7.2 mag e_r-i [0/0.06]?=-999 Uncertainty in r-i 79- 83 F5.2 mag i-z [-0.4/2.3]? template i-z color index 85- 91 F7.2 mag i-zrms [0/0.08]?=-999 RMS scatter in i-z template color index 93- 99 F7.2 mag e_i-z [0/0.09]?=-999 Uncertainty in i-z
Note (1): All bins are 0.5dex with the number reported denoting the highest value in the bin (e.g., 0.0 means the metallicity is between -0.5 and 0.0dex compared to solar metallicity).
History: From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 07-Aug-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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