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

Data Set: SDSS-DR16, AUX fields

Name Storage Units Description Default All
tfile AUX File that best fit template comes from in idlspec2d product
theta AUX Template coefficients of best fit
thing_id AUX Resolve THING_ID in SDSS imaging for best positional match
thing_id_targeting AUX Resolve THING_ID in SDSS imaging for targeted object
tile AUX Tile number (each tile can have several plates drilled for it)
vdisp AUX km s-1 Velocity dispersion
vdispchi2 AUX Chi-squared for best-fit velocity dispersion
vdispdof AUX Number of degrees of freedom in velocity dispersion fit
vdisp_err AUX km s-1 Error in velocity dispersion
vdispnpix AUX Number of pixels overlapping the templates used in the velocity dispersion fit
vdispz AUX Redshift associated with best-fit velocity dispersion
vdispz_err AUX Error in redshift associated with best-fit velocity dispersion
wcoverage AUX Coverage in wavelength, in units of log10 wavelength
xfocal AUX mm Hole position on plate (+X = +RA)
yfocal AUX mm Hole position on plate (+Y = +DEC)
z_conf_person AUX Visual-inspection confidence (0=not inspected or no confidence, 1,2=low confidence, 3,4=high confidence)
z_err_noqso AUX Error in Z_NOQSO redshift
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
zoffset AUX micron Washer thickness used for backstopping BOSS quasar targets, so they are closer to 4000 Angstrom focal plan
z_person AUX Visual-inspection redshift
zwarning_noqso AUX Warnings in z_noqso redshift (BOSS spectra only)

Data Set: SDSS-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: BOSS-DR16, AUX fields

Name Storage Units Description Default All
snturnoff AUX Signal to noise measure for MS turnoff stars on plate (-9999 if not appropriate)
thing_id AUX Resolve THING_ID in SDSS imaging for best positional match
sn_median AUX Median signal-to-noise per pixel within each of the ugriz bandpasses
zoffset AUX micron Washer thickness used for backstopping BOSS quasar targets, so they are closer to 4000 Angstrom focal plan
elodie_logg AUX log10(gravity) of ELODIE star
fiberid AUX Fiber number
spec2_r AUX Signal-to-noise squared for spectrograph #2, at r=20.25 for SDSS spectrograph spectra, r=20.20 for BOSS spectrograph spectra
vdisp_err AUX km s-1 Error in velocity dispersion
run2d AUX Spectroscopic 2D reduction (extraction of spectra) name
designid AUX Design identification number for plate
spec2_g AUX Signal-to-noise squared for spectrograph #2, at g=20.20 for SDSS spectrograph spectra, g=21.20 for BOSS spectrograph spectra
wcoverage AUX Coverage in wavelength, in units of log10 wavelength
fracnsigma AUX Fraction of pixels deviant by more than N sigma relative to best-fit (for 1,2,..,10 sigma)
elodie_dof AUX Degrees of freedom in fit to best ELODIE star
specsegue1 AUX Set to 1 for primary SDSS SEGUE-1 program observation of object, 0 otherwise
special_target2 AUX Secondary (calibration) target flags for SDSS-I and SDSS-II special program targets
z_err_noqso AUX Error in Z_NOQSO redshift
spec1_r AUX Signal-to-noise squared for spectrograph #1, at r=20.25 for SDSS spectrograph spectra, r=20.20 for BOSS spectrograph spectra
nturnoff AUX Number of stars used for SNTURNOFF determination
elodie_z_modelerr AUX Standard deviation in Elodie redshift among the 12 best-fit stars
survey AUX Survey name

Data Set: BOSS-DR16, SPECTRA fields

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

Data Set: DESI-DR1, AUX fields

Name Storage Units Description Default All
sv1_bgs_target AUX BGS (bright time program) target selection bitmask for SV1
cmx_target AUX Target selection bitmask for commissioning
pmra AUX mas year-1 Reference catalog proper motion in the RA direction
ncoeff AUX Number of Redrock template coefficients
sv3_bgs_target AUX BGS (bright time program) target selection bitmask for SV3
chi2 AUX Best fit chi-squared
sv1_scnd_target AUX Secondary target selection bitmask for SV1
sv2_desi_target AUX DESI (dark time program) target selection bitmask for SV2
sv_primary AUX Boolean flag (True/False) for the primary coadded spectrum in SV (SV1+2+3)
mean_delta_y AUX mm Mean (over exposures) fiber difference requested - actual CS5 Y location on focal plane
fa_type AUX Fiberassign internal target type (science, standard, sky, safe, suppsky)
std_fiber_dec AUX arcsec Standard deviation (over exposures) of DEC of actual fiber position
tsnr2_lrg AUX LRG template (S/N)^2 summed over B,R,Z
numobs_init AUX Initial number of observations for target calculated across target selection bitmasks and OBSCONDITIONS
subtype AUX Spectral subtype
priority_init AUX Target initial priority from target selection bitmasks and OBSCONDITIONS
mws_target AUX Milky Way Survey targeting bits

Data Set: DESI-DR1, 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

Data Set: DESI-EDR, AUX fields

Name Storage Units Description Default All
std_fiber_dec AUX arcsec Standard deviation (over exposures) of DEC of actual fiber position
std_fiber_ra AUX arcsec Standard deviation (over exposures) of RA of actual fiber position
mean_mjd AUX days Mean (over exposures) of the Modified Julian Date (MJD) when the shutter was opened
plate_dec AUX deg Declination to be used by PlateMaker
mean_fiber_ra AUX deg Mean (over exposures) RA of actual fiber position
plate_ra AUX deg Right Ascension to be used by PlateMaker
mean_fiber_dec AUX deg Mean (over exposures) DEC of actual fiber position
pmdec AUX mas year-1 Reference catalog proper motion in the Dec direction
pmra AUX mas year-1 Reference catalog proper motion in the RA direction
mean_delta_x AUX mm Mean (over exposures) fiber difference between measured and requested CS5 X location on focal plane
rms_delta_y AUX mm RMS (over exposures) of the fiber difference between measured and requested CS5 Y location on focal plane
rms_delta_x AUX mm RMS (over exposures) of the fiber difference between measured and requested CS5 X location on focal plane
mean_delta_y AUX mm Mean (over exposures) fiber difference requested - actual CS5 Y location on focal plane
ref_epoch AUX year Reference epoch for Gaia/Tycho astrometry. Typically 2015.5 for Gaia
coadd_numnight AUX Number of different nights included in the coadd for this target
coeff AUX Redrock template coefficients
program AUX DESI program type - BRIGHT, DARK, BACKUP, OTHER
coadd_numtile AUX Number of different tiles included in the coadd for this target
cmx_target AUX Target selection bitmask for commissioning
deltachi2 AUX Delta-chi-squared for template fit from Redrock
sv1_scnd_target AUX Secondary target selection bitmask for SV1
sv3_bgs_target AUX BGS (bright time program) target selection bitmask for SV3
subtype AUX Spectral subtype
sv3_scnd_target AUX Secondary target selection bitmask for SV3
numobs_init AUX Initial number of observations for target calculated across target selection bitmasks and OBSCONDITIONS

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

Data Set: SDSS-DR17-test, AUX fields

Name Storage Units Description Default All
theta AUX Template coefficients of best fit
thing_id AUX Resolve THING_ID in SDSS imaging for best positional match
thing_id_targeting AUX Resolve THING_ID in SDSS imaging for targeted object
tile AUX Tile number (each tile can have several plates drilled for it)
vdisp AUX km s-1 Velocity dispersion
vdispchi2 AUX Chi-squared for best-fit velocity dispersion
vdispdof AUX Number of degrees of freedom in velocity dispersion fit
vdisp_err AUX km s-1 Error in velocity dispersion
vdispnpix AUX Number of pixels overlapping the templates used in the velocity dispersion fit
vdispz AUX Redshift associated with best-fit velocity dispersion
vdispz_err AUX Error in redshift associated with best-fit velocity dispersion
wcoverage AUX Coverage in wavelength, in units of log10 wavelength
xfocal AUX mm Hole position on plate (+X = +RA)
yfocal AUX mm Hole position on plate (+Y = +DEC)
z_conf_person AUX Visual-inspection confidence (0=not inspected or no confidence, 1,2=low confidence, 3,4=high confidence)
z_err_noqso AUX Error in Z_NOQSO redshift
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
zoffset AUX micron Washer thickness used for backstopping BOSS quasar targets, so they are closer to 4000 Angstrom focal plan
z_person AUX Visual-inspection redshift
zwarning_noqso AUX Warnings in z_noqso redshift (BOSS spectra only)

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
SPARCL Field Cat(alog)