TABLE  sppParams

Contains outputs from the Spectro Parameter Pipeline (spp).

Spectra for over 250,000 Galactic stars of all common spectral types are available with DR6. These Spectra were processed with a pipeline called the 'Spectro Parameter Pipeline' (spp) that computes standard stellar atmospheric parameters such as [Fe/H], log g and Teff for each star by a variety of methods. These outputs are stored in this table, and indexed on the 'specObjID' key index parameter for queries joining to other tables such as specobjall and photoobjall. See the Sample Queries in SkyServer for examples of such queries.

nametypelengthunitucddescription
specobjidbigint8  64 bit unique spectrum id f(p,mjd,fiber)
plateint4  plate number
mjdint4  Modified Julian Date of (last) observation
fiberidint4  Fiber number (1-640) 1-320 on spec#1
seguetargetclassvarchar64  SEGUE or SDSS target type abbrev. (see targettype below)
hammersptypevarchar64  Stellar Type Classification -- UW
sptypeavarchar64  Stellar Type Classification -- SSPP
flagvarchar64  SSPP flags BCdDEgGhHlnNSV, n=normal
fehareal4dex adopted [Fe/H] value, combination of good estimates
fehanint4  number of estimators combined into feha
fehaerrreal4  error/sigma on the [Fe/H] value, or -9.999
feh1real4  YSL1 Kurucz NGS grid [Fe/H]
feh1nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
feh1errreal4  error/sigma on the [Fe/H] value
feh2real4  YSL2 Kurucz NGS grid [Fe/H] --U/ dex
feh2nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
feh2errreal4  error/sigma on the [Fe/H] value
feh3real4  ANNSR [Fe/H] neural network SR method
feh3nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
feh3errreal4  error/sigma on the [Fe/H] value
feh4real4  ANNRR [Fe/H] neural network RR method
feh4nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
feh4errreal4  error/sigma on the [Fe/H] value
feh5real4  CaK_Y [Fe/H] from neural network method
feh5nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
feh5errreal4  error/sigma on the [Fe/H] value
feh6real4  CaK_T1 [Fe/H] from neural network method
feh6nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
feh6errreal4  error/sigma on the [Fe/H] value
feh7real4  CaK_T2 [Fe/H] from neural network method
feh7nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
feh7errreal4  error/sigma on the [Fe/H] value
feh8real4  AUTOcorrelation [Fe/H] method
feh8nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
feh8errreal4  error/sigma on the [Fe/H] value
feh9real4  Ca triplet method [Fe/H]
feh9nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
feh9errreal4  error/sigma on the [Fe/H] value
feh10real4  Wilhelm, Beers and Gray method (1999) [Fe/H]
feh10nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
feh10errreal4  error/sigma on the [Fe/H] value
feh11real4  [Fe/H] from Carlos K24 grid method
feh11nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
feh11errreal4  error/sigma on the [Fe/H] value
feh12real4  [Fe/H] from Carlos K13 grid method
feh12nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
feh12errreal4  error/sigma on the [Fe/H] value
teffareal4Kelvins Adopted Teff -- weighted mean
teffanint4  number of methods averaged
teffaerrreal4  error/sigma on the Teff
teff1real4  Teff from H alpha line (24A EW)
teff1nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
teff1errreal4  erorr/sigma on the Teff
teff2real4  Teff from H delta line (24A EW)
teff2nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
teff2errreal4  error/sigma on the Teff
teff3real4  Teff from Kurucz models, based on colors
teff3nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
teff3errreal4  error/sigma on the Teff
teff4real4  Teff from Girardi isochrones (2004)
teff4nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
teff4errreal4  error/sigma on the Teff
teff5real4  Teff from Ivezic et al. (2007) (colors)
teff5nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
teff5errreal4  error/sigma on the Teff
teff6real4  Teff from YSL method
teff6nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
teff6errreal4  error/sigma on the Teff
teff7real4  Teff from neural network method ANNSR
teff7nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
teff7errreal4  error/sigma on the Teff
teff8real4  Teff from neural network method ANNRR
teff8nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
teff8errreal4  error/sigma on the Teff
teff9real4  Teff from Wilhelm, Beers, and Gray (1999)
teff9nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
teff9errreal4  error/sigma on the Teff
teff10real4  Teff from Carlos k24 grid
teff10nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
teff10errreal4  error/sigma on the Teff
teff11real4  Teff from Carlos ki13 grid
teff11nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
teff11errreal4  error/sigma on the Teff
loggareal4cgs Adopted log g -- weighted mean
logganint4  number of methods used
loggaerrreal4  error/sigma on log g
logg1real4  log g from YSL1 Kurucz grid
logg1nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
logg1errreal4  error/sigma on log g
logg2real4  log g from YSL2 Kurucz grid
logg2nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
logg2errreal4  error/sigma on log g
logg3real4  log g from neural netork method ANNSR
logg3nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
logg3errreal4  error/sigma on log g
logg4real4  log g from neural network method ANNRR
logg4nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
logg4errreal4  error/sigma on log g
logg5real4  log g from CaK_Y method
logg5nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
logg5errreal4  error/sigma on log g
logg6real4  log g from from Ca I (4226 A) line index
logg6nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
logg6errreal4  error/sigma on log g
logg7real4  log g from MgH features (around 5170 A)
logg7nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
logg7errreal4  error/sigma on log g
logg8real4  log g from Wilhelm, Beers, and Gray (1999)
logg8nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
logg8errreal4  error/sigma on log g
logg9real4  log g from Carlos k24 grid
logg9nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
logg9errreal4  error/sigma on log g
logg10real4  log g from Carlos ki13 grid
logg10nint4  0 = no value, 1 = low S/N value, 2 = good, included in feha average
logg10errreal4  error/sigma on log g
alphafereal4dex [alpha/Fe] from YoungSun's Kurucz grid 2
alphafenint4  0 =no value, 1 = ok
alphafeerrreal4dex error on [alpha/Fe]
elodiervreal4km/s ELODIE template match RV (offset)
elodierverrreal4km/s ELODIE RV error
g0real4mag Dereddened psf magnitude in the g band (before ubercal corr)
gmr0real4mag Dereddened target psf color (g-r)_0 (before ubercal corr)
grhbaareal4mag Adopted predicted (g-r)_0 from Balmer lines
grbhareal4mag predicted (g-r)_0 from H alpha
grbhdreal4mag predicted (g-r)_0 from H delta
grhpreal4mag predicted (g-r)_0 from half power point
umg0real4mag Dereddened target psf color (u-g)_0 (before ubercal corr)
rmi0real4mag Dereddened target psf color (r-i)_0 (before ubercal corr)
imz0real4mag Dereddened target psf color (i-z)_0 (before ubercal corr)
uerrreal4mag Error in psf magnitude u band
gerrreal4mag Error in psf magnitude g band
rerrreal4mag Error in psf magnitude r band
ierrreal4mag Error in psf magnitude i band
zerrreal4mag Error in psf magnitude z band
ebvreal4mag E(B-V) at this (l,b) from SFD98
snareal4  Avg S/N per pixel over 3950-6000 A
qualitycheckint4  Quality check (=0)
rafloat8degrees RA (J2000)
decfloat8degrees DEC (J2000)
lfloat8degrees Galactic Longitude
bfloat8degrees Galactic Latitude
chiHKreal4  chi-square/dof region of Ca H+K
chiGbandreal4  chi-square/dof region of the G band
targ_pmepochfloat8years PM epoch (targ version, use propermotions table join)
targ_pmmatchreal4  Proper motion match to USNO-B catalog 1=match
targ_pmdeltareal4arcsec distance the star has moved
targ_pmlreal4mas/yr propermotion in the Gal. l
targ_pmbreal4mas/yr proper motion in the Gal. b
targ_pmrareal4mas/yr proper motion in ra
targ_pmdecreal4mas/yr proper motion in dec
targ_pmraerrreal4mas/yr error in pmra
targ_pmdecerrreal4mas/yr error in pmdec
targ_pmsigrareal4  sigma in ra ppm
targ_pmsigdecreal4  sigma in dec ppm
targ_pmnfitint4  number of fits to the ppm
targ_usnomag_ureal4  USNO-B mag of the star in derived u band
targ_usnomag_greal4  USNO-B mag of the star in derived g band
targ_usnomag_rreal4  USNO-B mag of the star in derived r band
targ_usnomag_ireal4  USNO-B mag of the star in derived i band
targ_usnomag_zreal4  USNO-B mag of the star in derived z band
targ_pmdist20real4arcs dist to nearest star g less than 20
targ_pmdist22real4arcs dist to nearest star g less than 22
targ_raErrreal4mas error in ra
targ_decErrreal4mas error in dec
targ_raDecErrreal4  ra dec cross correlation term
brunint4  SDSS Run number (best version of sky)
brerunint4  SDSS Rerun number (best version of sky)
bcamcolint4  SDSS Camcol number (best version of sky)
bfieldint4  SDSS Field number (best version of sky)
bobjint4  SDSS object number (best version of sky)
lparreal4mag Newberg-Lenz "l" color, perp. locus
sparreal4mag Ivezic (modified) s color, prn. cmp.
wparreal4mag Ivezic (modified) w color, prn. cmp.
p1sparreal4mag Ivezic color, perp to s color
bszreal4  SpecBS pipeline redshift
bszerrreal4  SpecBS pipeline redshift error
targettypevarchar64  SEGUE or Legacy Target type string, see primtarget in specobjall table
zbclassvarchar64  SpecBS class (STAR, GALAXY, QSO)
zbsubclassvarchar64  SpecBS subclass (type of star)
zbelodiesptypevarchar64  SpecBS ELODIE spectral type (type of best match template star)
zbrchi2real4  SpecBS rchi2 reduced chi-square per dof
zbdofreal4  SpecBS degrees of freedom measure for best fit template
zbvdispreal4km/s SpecBS Velocity dispersion (for galaxies)
zbvdisperrreal4km/s SpecBS error in Velocity disp
zbzwarningreal4  SpecBS warning flag
spec_clnint4  Spectro1d(Chicago) class 1= star, 2 = Galaxy, 3,4 = QSO, 6= redstar
spzreal4  Spectro1d(Chicago) redshift (Legacy primary objects hand inspected)
spzerrreal4  Spectro1d(Chicago) redhisft error
vel_disreal4km/s Spectro1d(Chicago) Velocity dispersion (for galaxies)
vel_disperrreal4km/s Spectro1d(Chicago) Vel disp error
spz_confreal4  Spectro1d(Chicago) redshift confidence
spz_statusint4  Spectro1d(Chicago) redshift status
spz_warningint4  Spectro1d(Chicago) redshift warning
eclassreal4  Spectro1d(Chicago) galaxy Principal component class
ecoeff1real4  Galaxy Prin. comp. 1 (for galaxies)
ecoeff2real4  Galaxy Prin. comp. 2 (for galaxies)
ecoeff3real4  Galaxy Prin. comp. 3 (for galaxies)
ecoeff4real4  Galaxy Prin. comp. 4 (for galaxies)
ecoeff5real4  Galaxy Prin. comp. 5 (for galaxies)
tsvervarchar64  Version of SEGUE target selection version used (or Legacy)
amnhtypevarchar64  AMNH Red Star Spectral Type (sdM, esdM, usdM)
amnhsubtypereal4  AMNH Red Star Spectral Sub-type classification (0-9)
amnhmindexreal4  AMNH Red Star pixels shifted for best fit parameter
amnhmvaluereal4  AMNH Red Star least squares chi-sq estimate parameter
inspectint4  Identically 0