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
data_release CORE [Categorical] Data release of a given record (with a common data structure, e.g., SDSS-DR16, BOSS-DR16)
datasetgroup CORE [Categorical] Common name for a coherent set of spectra published as a single release (e.g., SDSS_BOSS)
dateobs CORE Range of observational dates for a given spectrum (single value for a single date)
dateobs_center CORE Central value of the dateobs range
dec CORE deg Declination in degrees
exptime CORE second Exposure time in seconds
extra_files CORE Additional files read for ingest
file CORE File used for this record
instrument CORE [Categorical] Instrument used for observation
ra CORE deg Right Ascension in degrees
redshift CORE Measured redshift, or radial velocity in units of redshift
redshift_err CORE Uncertainty on the measured redshift, or radial velocity in units of redshift
redshift_warning CORE Bitmask with warning on redshift result
site CORE [Categorical] Site of observations
sparcl_id CORE Universally Unique Identifier for spectrum in SPARCL
specid CORE Dataset-specific spectrum identifier (may not be unique)
specprimary CORE Whether an entry is the primary spectrum for a given target object
spectype CORE [Categorical] Spectral type of the object (STAR, GALAXY, QSO)
targetid CORE Dataset-specific photometric target identifier
telescope CORE [Categorical] Telescope used for the observation
updated CORE Date and time when the record was created/updated
wavemax CORE AA Maximum value of wavelength coverage in Angstroms
wavemin CORE AA Minimum value of wavelength coverage in Angstroms
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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
boss_specobj_id AUX Identification number internal to BOSS for SPECBOSS=1 objects
special_target1 AUX Primary (science) target flags for SDSS-I and SDSS-II special program targets
objid AUX SDSS photometric object identification numbers (RUN, RERUN, CAMCOL, FIELD, ID)
dof AUX Number of degrees of freedom in best fit
calibflux AUX nanomaggy ugriz fluxes used for calibrations
lambda_eff AUX AA Effective wavelength drilling position was optimized for
vdispnpix AUX Number of pixels overlapping the templates used in the velocity dispersion fit
z_person AUX Visual-inspection redshift
spectroflux AUX nanomaggy Spectrum projected onto ugriz filters
xfocal AUX mm Hole position on plate (+X = +RA)
fracnsiglo AUX Fraction of pixels low by more than N sigma relative to best-fit (for 1,2,..,10 sigma)
sn_median AUX Median signal-to-noise per pixel within each of the ugriz bandpasses
anyandmask AUX For each bit, records whether any pixel in the spectrum has that bit set in its ANDMASK
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
elodie_object AUX Star name for ELODIE star
segue1_target2 AUX Primary (science) target flags for SEGUE-1 targets
speclegacy AUX Set to 1 for primary SDSS Legacy program observation of object, 0 otherwise
spectrosynflux_ivar AUX nanomaggy-2 Inverse variance of best-fit template spectrum projected onto ugriz filters
legacy_target1 AUX Primary (science) target flags for SDSS-I and SDSS-II Legacy survey
designid AUX Design identification number for plate
ancillary_target2 AUX BOSS ancillary target selection information at plate design
elodie_rchi2 AUX Reduced chi-squared of fit to best ELODIE star
eboss_target2 AUX eBOSS, TDSS and SPIDERS target selection flags for main eBOSS survey
platequality AUX Final quality of plate this spectrum came from (good, marginal, or bad)
platesn2 AUX Overall signal-to-noise-squared measure for plate (only for SDSS spectrograph plates)

Data Set: SDSS-DR16, SPECTRA fields

Name Storage Units Description Default All
mask SPECTRA and_mask
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
wave_sigma SPECTRA pixel Line-spread function width (sigma of approximating Gaussian) in units of number of pixel
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

Data Set: BOSS-DR16, AUX fields

Name Storage Units Description Default All
elodie_bv AUX mag (B-V) color index for ELODIE star
elodie_dof AUX Degrees of freedom in fit to best ELODIE star
elodie_feh AUX Metallicity [Fe/H] of ELODIE star
elodie_filename AUX File name for best-fit ELODIE star
elodie_logg AUX log10(gravity) of ELODIE star
elodie_object AUX Star name for ELODIE star
elodie_rchi2 AUX Reduced chi-squared of fit to best ELODIE star
elodie_sptype AUX ELODIE star spectral type
elodie_teff AUX Kelvin Effective temperature of ELODIE star
elodie_z AUX Redshift fit to ELODIE star
elodie_z_err AUX Error in redshift fit to ELODIE star
elodie_z_modelerr AUX Standard deviation in Elodie redshift among the 12 best-fit stars
fiberid AUX Fiber number
firstrelease AUX Name of first release this PLATE, MJD, FIBERID, RUN2D was associated with
fluxobjid AUX Unique database ID of flux-based photometric match based on RUN, RERUN, CAMCOl, FIELD, ID (same as SkyServer version)
fracnsighi AUX Fraction of pixels high by more than N sigma relative to best-fit (for 1,2,..,10 sigma)
fracnsiglo AUX Fraction of pixels low by more than N sigma relative to best-fit (for 1,2,..,10 sigma)
fracnsigma AUX Fraction of pixels deviant by more than N sigma relative to best-fit (for 1,2,..,10 sigma)
lambda_eff AUX AA Effective wavelength drilling position was optimized for
legacy_target1 AUX Primary (science) target flags for SDSS-I and SDSS-II Legacy survey
legacy_target2 AUX Secondary (calibration) target flags for SDSS-I and SDSS-II Legacy survey
marvels_target1 AUX Primary (science) target flags for MARVELS targets
marvels_target2 AUX Secondary (calibration) target flags for MARVELS targets
mjd AUX days Modified Julian Day of observation
npoly AUX Number of polynomial terms in fit

Data Set: BOSS-DR16, SPECTRA fields

Name Storage Units Description Default All
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
sky SPECTRA 1e-17 erg cm-2 s-1 AA-1 Subtracted sky flux
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: DESI-DR1, AUX fields

Name Storage Units Description Default All
bgs_target AUX BGS (Bright Galaxy Survey) target selection bitmask
chi2 AUX Best fit chi-squared
cmx_target AUX Target selection bitmask for commissioning
coadd_fiberstatus AUX Bitwise AND of the FIBERSTATUS values of the spectra used in the coadd
coadd_numexp AUX Number of exposures included in the coadd for this target
coadd_numnight AUX Number of different nights included in the coadd for this target
coadd_numtile AUX Number of different tiles included in the coadd for this target
coeff AUX Redrock template coefficients
deltachi2 AUX Delta-chi-squared for template fit from Redrock
desiname AUX DESI JXXX.XXXX[+/-]YY.YYYY where X, Y are TARGET_{RA, DEC} truncated to 4 decimals
desi_target AUX DESI (dark time program) target selection bitmask
fa_target AUX Targeting bit internally used by fiberassign (linked with FA_TYPE)
fa_type AUX Fiberassign internal target type (science, standard, sky, safe, suppsky)
healpix AUX HEALPixel containing this location at NSIDE=64 in the NESTED scheme
main_nspec AUX Number of coadded spectra for this TARGETID in Main survey
main_primary AUX Boolean flag (True/False) for the primary coadded spectrum in Main survey
mean_delta_x AUX mm Mean (over exposures) 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
mean_fiber_dec AUX deg Mean (over exposures) DEC of actual fiber position
mean_fiber_ra AUX deg Mean (over exposures) RA of actual fiber position
mean_mjd AUX days Mean (over exposures) of the Modified Julian Date (MJD) when the shutter was opened
mean_psf_to_fiber_specflux AUX Mean of input exposures fraction of light from point-like source captured by 1.5 arcsec diameter fiber given atmospheric seeing
mws_target AUX Milky Way Survey targeting bits
ncoeff AUX Number of Redrock template coefficients
npixels AUX Number of unmasked wavelengths that contributed to the redshift fit

Data Set: DESI-DR1, SPECTRA fields

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

Data Set: DESI-EDR, AUX fields

Name Storage Units Description Default All
subpriority AUX Random subpriority [0-1] to break assignment ties
std_fiber_ra AUX arcsec Standard deviation (over exposures) of RA of actual fiber position
std_fiber_dec AUX arcsec Standard deviation (over exposures) of DEC of actual fiber position
spgrpval AUX Value corresponding to the grouping type indicated in the spgrp column. This is the same as the healpix column
scnd_target AUX Target selection bitmask for secondary programs
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
ref_epoch AUX year Reference epoch for Gaia/Tycho astrometry. Typically 2015.5 for Gaia
program AUX DESI program type - BRIGHT, DARK, BACKUP, OTHER
priority_init AUX Target initial priority from target selection bitmasks and OBSCONDITIONS
pmra AUX mas year-1 Reference catalog proper motion in the RA direction
pmdec AUX mas year-1 Reference catalog proper motion in the Dec direction
plate_ra AUX deg Right Ascension to be used by PlateMaker
plate_dec AUX deg Declination to be used by PlateMaker
obsconditions AUX Bit-coded of allowed observing conditions
objtype AUX Object type: TGT, SKY, NON, BAD
numobs_init AUX Initial number of observations for target calculated across target selection bitmasks and OBSCONDITIONS
npixels AUX Number of unmasked wavelengths that contributed to the redshift fit
ncoeff AUX Number of Redrock template coefficients
mws_target AUX Milky Way Survey targeting bits
mean_psf_to_fiber_specflux AUX Mean of input exposures fraction of light from point-like source captured by 1.5 arcsec diameter fiber given atmospheric seeing
mean_mjd AUX days Mean (over exposures) of the Modified Julian Date (MJD) when the shutter was opened
mean_fiber_ra AUX deg Mean (over exposures) RA of actual fiber position
mean_fiber_dec AUX deg Mean (over exposures) DEC of actual fiber position
mean_delta_y AUX mm Mean (over exposures) fiber difference requested - actual CS5 Y location on focal plane

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
ancillary_target1 AUX BOSS ancillary science target selection information at plate design
ancillary_target2 AUX BOSS ancillary target selection information at plate design
anyandmask AUX For each bit, records whether any pixel in the spectrum has that bit set in its ANDMASK
anyormask AUX For each bit, records whether any pixel in the spectrum has that bit set in its ORMASK
bluefiber AUX Set to 1 if this hole was designated a blue fiber, 0 if designated a red fiber (high redshift LRGs are preferentially in red fibers)
boss_specobj_id AUX Identification number internal to BOSS for SPECBOSS=1 objects
boss_target1 AUX Primary (science) target flags for BOSS targets
boss_target2 AUX Always set to zero (placeholder for BOSS target flags never used)
calibflux AUX nanomaggy ugriz fluxes used for calibrations
calibflux_ivar AUX nanomaggy-2 Inverse variances of ugriz fluxes used for calibrations
chi68p AUX 68-th percentile value of abs(chi) of the best-fit synthetic spectrum to the actual spectrum (around 1.0 for a good fit)
chunk AUX Name of tiling chunk that this spectrum was tiled in (boss1, boss2, etc), important for tracking large-scale structure samples
class_noqso AUX Spectroscopic classification for Z_NOQSO redshift
class_person AUX Visual-inspection classification (0=not inspected or unknown, 1=star, 2=narrow emission-line galaxy, 3=QSO, 4=galaxy)
comments_person AUX Visual-inspection comments
cx AUX x of Normal unit vector in J2000
cy AUX y of Normal unit vector in J2000
cz AUX z of Normal unit vector in J2000
deredsn2 AUX Dereddened overall signal-to-noise-squared measure for plate (only for BOSS spectrograph plates)
designid AUX Design identification number for plate
dof AUX Number of degrees of freedom in best fit
eboss_target1 AUX eBOSS, TDSS and SPIDERS target selection flags for main eBOSS survey
eboss_target2 AUX eBOSS, TDSS and SPIDERS target selection flags for main eBOSS survey
eboss_target_id AUX EBOSS unique target identifier for every spectroscopic target
elodie_bv AUX mag (B-V) color index for ELODIE star

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)