SPARCL - SPARCL Field Catalog (SFC)

SPARCL Field Catalog

List of Fields available via Retrieve

CORE fields (common to all Data Sets)

Name Storage Units Description Default All
extra_files CORE Additional files read for ingest
updated CORE Date and time when the record was created/updated
file CORE File used for this record
dateobs_center CORE Central value of the dateobs range
site CORE [Categorical] Site of observations
datasetgroup CORE [Categorical] Common name for a coherent set of spectra published as a single release (e.g., SDSS_BOSS)
specid CORE Dataset-specific spectrum identifier (may not be unique)
instrument CORE [Categorical] Instrument used for observation
redshift CORE Measured redshift, or radial velocity in units of redshift
targetid CORE Dataset-specific photometric target identifier
ra CORE deg Right Ascension in degrees
data_release CORE [Categorical] Data release of a given record (with a common data structure, e.g., SDSS-DR16, BOSS-DR16)
wavemin CORE AA Minimum value of wavelength coverage in Angstroms
spectype CORE [Categorical] Spectral type of the object (STAR, GALAXY, QSO)
dec CORE deg Declination in degrees
telescope CORE [Categorical] Telescope used for the observation
redshift_err CORE Uncertainty on the measured redshift, or radial velocity in units of redshift
wavemax CORE AA Maximum value of wavelength coverage in Angstroms
sparcl_id CORE Universally Unique Identifier for spectrum in SPARCL
exptime CORE second Exposure time in seconds
specprimary CORE Whether an entry is the primary spectrum for a given target object
dateobs CORE Range of observational dates for a given spectrum (single value for a single date)
redshift_warning CORE Bitmask with warning on redshift result
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AUX and SPECTRA fields (unique to each Data Set)

Data Set: BOSS-DR16, AUX fields

Name Storage Units Description Default All
nspecobs AUX Number of spectroscopic observations of this source
nturnoff AUX Number of stars used for SNTURNOFF determination
objid AUX SDSS photometric object identification numbers (RUN, RERUN, CAMCOL, FIELD, ID)
plate AUX Plate number (each plate corresponds to an actual plug plate)
plateid AUX Unique database ID of plate based on PLATE, MJD, RUN2D (same as SkyServer version)
platequality AUX Final quality of plate this spectrum came from (good, marginal, or bad)
platerun AUX Drilling run that this plate was drilled in
platesn2 AUX Overall signal-to-noise-squared measure for plate (only for SDSS spectrograph plates)
primtarget AUX Target selection information at plate design, primary science selection (for backwards compatibility)
programname AUX Program within each survey that the plate was part of
rchi2 AUX Reduced chi-squared of best fit
rchi2diff AUX Difference in reduced chi-squared between best and second best fit
rchi2diff_noqso AUX Difference in reduced chi-squared between best and second best fit for Z_NOQSO redshift
run1d AUX Spectroscopic 1D reduction (redshift and classification) name
run2d AUX Spectroscopic 2D reduction (extraction of spectra) name
sectarget AUX Deprecated version of secondary (calibration) target flags (meanings highly overloaded)
segue1_target1 AUX Primary (science) target flags for SEGUE-1 targets
segue1_target2 AUX Secondary (calibration) target flags for SEGUE-1 targets
segue2_target1 AUX Primary (science) target flags for SEGUE-2 targets
segue2_target2 AUX Secondary (calibration) target flags for SEGUE-2 targets
sn_median AUX Median signal-to-noise per pixel within each of the ugriz bandpasses
sn_median_all AUX Median signal-to-noise per pixel across full spectrum
snturnoff AUX Signal to noise measure for MS turnoff stars on plate (-9999 if not appropriate)
sourcetype AUX String expressing type of source (similar to OBJTYPE in DR8 and earlier)
spec1_g AUX Signal-to-noise squared for spectrograph #1, at g=20.20 for SDSS spectrograph spectra, g=21.20 for BOSS spectrograph spectra

Data Set: BOSS-DR16, SPECTRA fields

Name Storage Units Description Default All
sky SPECTRA 1e-17 erg cm-2 s-1 AA-1 Subtracted sky flux
flux SPECTRA 1e-17 erg cm-2 s-1 AA-1 Coadded calibrated flux
model SPECTRA 1e-17 erg cm-2 s-1 AA-1 Pipeline best model fit used for classification and redshift
ivar SPECTRA 1e+34 cm4 s2 AA2 erg-2 Inverse variance of flux
wavelength SPECTRA AA Wavelength in units of Angstroms
wave_sigma SPECTRA pixel Line-spread function width (sigma of approximating Gaussian) in units of number of pixel
mask SPECTRA and_mask

Data Set: SDSS-DR16, AUX fields

Name Storage Units Description Default All
lambda_eff AUX AA Effective wavelength drilling position was optimized for
mjd AUX days Modified Julian Day of observation
elodie_teff AUX Kelvin Effective temperature of ELODIE star
vdisp AUX km s-1 Velocity dispersion
vdisp_err AUX km s-1 Error in velocity dispersion
elodie_bv AUX mag (B-V) color index for ELODIE star
zoffset AUX micron Washer thickness used for backstopping BOSS quasar targets, so they are closer to 4000 Angstrom focal plan
yfocal AUX mm Hole position on plate (+Y = +DEC)
xfocal AUX mm Hole position on plate (+X = +RA)
calibflux AUX nanomaggy ugriz fluxes used for calibrations
spectroflux AUX nanomaggy Spectrum projected onto ugriz filters
spectrosynflux AUX nanomaggy Best-fit template spectrum projected onto ugriz filters
spectroskyflux AUX nanomaggy Sky flux in each of the ugriz imaging filters
spectroflux_ivar AUX nanomaggy-2 Inverse variance of spectrum projected onto ugriz filters
spectrosynflux_ivar AUX nanomaggy-2 Inverse variance of best-fit template spectrum projected onto ugriz filters
calibflux_ivar AUX nanomaggy-2 Inverse variances of ugriz fluxes used for calibrations
cz AUX z of Normal unit vector in J2000
special_target2 AUX Secondary (calibration) target flags for SDSS-I and SDSS-II special program targets
eboss_target_id AUX EBOSS unique target identifier for every spectroscopic target
thing_id AUX Resolve THING_ID in SDSS imaging for best positional match
run1d AUX Spectroscopic 1D reduction (redshift and classification) name
targetobjid AUX Unique database ID of targeting object based on RUN, RERUN, CAMCOl, FIELD, ID (same as SkyServer version)
targettype AUX General type of target (SCIENCE, STANDARD, or SKY)
legacy_target2 AUX Secondary (calibration) target flags for SDSS-I and SDSS-II Legacy survey
spectrographid AUX Which spectrograph (1 or 2)

Data Set: SDSS-DR16, SPECTRA fields

Name Storage Units Description Default All
flux SPECTRA 1e-17 erg cm-2 s-1 AA-1 Coadded calibrated flux
ivar SPECTRA 1e+34 cm4 s2 AA2 erg-2 Inverse variance of flux
mask SPECTRA and_mask
model SPECTRA 1e-17 erg cm-2 s-1 AA-1 Pipeline best model fit used for classification and redshift
sky SPECTRA 1e-17 erg cm-2 s-1 AA-1 Subtracted sky flux
wavelength SPECTRA AA Wavelength in units of Angstroms
wave_sigma SPECTRA pixel Line-spread function width (sigma of approximating Gaussian) in units of number of pixel

Data Set: SDSS-DR17-test, AUX fields

Name Storage Units Description Default All
vdisp AUX km s-1 Velocity dispersion
fracnsighi AUX Fraction of pixels high by more than N sigma relative to best-fit (for 1,2,..,10 sigma)
z_noqso AUX Best redshift when ignoring QSO fits, recommended for BOSS CMASS and LOWZ targets; calculated only for survey=boss spectra, not for any SDSS spectrograph data
deredsn2 AUX Dereddened overall signal-to-noise-squared measure for plate (only for BOSS spectrograph plates)
elodie_z AUX Redshift fit to ELODIE star
vdisp_err AUX km s-1 Error in velocity dispersion
elodie_sptype AUX ELODIE star spectral type
sectarget AUX Deprecated version of secondary (calibration) target flags (meanings highly overloaded)
specsegue2 AUX Set to 1 for primary SDSS SEGUE-2 program observation of object, 0 otherwise
subclass_noqso AUX Spectroscopic subclassification for Z_NOQSO redshift
calibflux_ivar AUX nanomaggy-2 Inverse variances of ugriz fluxes used for calibrations
nturnoff AUX Number of stars used for SNTURNOFF determination
fracnsigma AUX Fraction of pixels deviant by more than N sigma relative to best-fit (for 1,2,..,10 sigma)
spectroskyflux AUX nanomaggy Sky flux in each of the ugriz imaging filters
chunk AUX Name of tiling chunk that this spectrum was tiled in (boss1, boss2, etc), important for tracking large-scale structure samples
cx AUX x of Normal unit vector in J2000
theta AUX Template coefficients of best fit
zwarning_noqso AUX Warnings in z_noqso redshift (BOSS spectra only)
primtarget AUX Target selection information at plate design, primary science selection (for backwards compatibility)
survey AUX Survey name

Data Set: SDSS-DR17-test, SPECTRA fields

Name Storage Units Description Default All
flux SPECTRA 1e-17 erg cm-2 s-1 AA-1 Coadded calibrated flux
ivar SPECTRA 1e+34 cm4 s2 AA2 erg-2 Inverse variance of flux
mask SPECTRA and_mask
model SPECTRA 1e-17 erg cm-2 s-1 AA-1 Pipeline best model fit used for classification and redshift
sky SPECTRA 1e-17 erg cm-2 s-1 AA-1 Subtracted sky flux
wavelength SPECTRA AA Wavelength in units of Angstroms
wave_sigma SPECTRA pixel Line-spread function width (sigma of approximating Gaussian) in units of number of pixel

Data Set: DESI-EDR, AUX fields

Name Storage Units Description Default All
mean_delta_x AUX mm Mean (over exposures) fiber difference between measured and requested CS5 X location on focal plane
lastnight AUX Last calendar date of the exposures used in the coadded spectrum as YYYYMMDD of the beginning of the observing night
healpix AUX HEALPixel containing this location at NSIDE=64 in the NESTED scheme
firstnight AUX First calendar date of the exposures used in the coadded spectrum as YYYYMMDD of the beginning of the observing night
fa_type AUX Fiberassign internal target type (science, standard, sky, safe, suppsky)
fa_target AUX Targeting bit internally used by fiberassign (linked with FA_TYPE)
desi_target AUX DESI (dark time program) target selection bitmask
deltachi2 AUX Delta-chi-squared for template fit from Redrock
coeff AUX Redrock template coefficients
coadd_numtile AUX Number of different tiles included in the coadd for this target
coadd_numnight AUX Number of different nights included in the coadd for this target
coadd_numexp AUX Number of exposures included in the coadd for this target
coadd_fiberstatus AUX Bitwise AND of the FIBERSTATUS values of the spectra used in the coadd
cmx_target AUX Target selection bitmask for commissioning
chi2 AUX Best fit chi-squared
bgs_target AUX BGS (Bright Galaxy Survey) target selection bitmask

Data Set: DESI-EDR, SPECTRA fields

Name Storage Units Description Default All
flux SPECTRA 1e-17 erg cm-2 s-1 AA-1 Coadded calibrated flux
ivar SPECTRA 1e+34 cm4 s2 AA2 erg-2 Inverse variance of flux
mask SPECTRA Mask value
model SPECTRA 1e-17 erg cm-2 s-1 AA-1 Pipeline best model fit
wavelength SPECTRA AA Wavelength in units of Angstroms
wave_sigma SPECTRA AA Line-spread function width (sigma of approximating Gaussian) in units of Angstroms
SPARCL Field Cat(alog)