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
ra CORE deg Right Ascension in degrees
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
dateobs_center CORE Central value of the dateobs range
updated CORE Date and time when the record was created/updated
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
specprimary CORE Whether an entry is the primary spectrum for a given target object
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
extra_files CORE Additional files read for ingest
exptime CORE second Exposure time in seconds
file CORE File used for this record
Download .csv Download .json

AUX and SPECTRA fields (unique to each Data Set)

Data Set: SDSS-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 Primary (science) 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: 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: BOSS-DR16, AUX fields

Name Storage Units Description Default All
fracnsighi AUX Fraction of pixels high by more than N sigma relative to best-fit (for 1,2,..,10 sigma)
targetobjid AUX Unique database ID of targeting object based on RUN, RERUN, CAMCOl, FIELD, ID (same as SkyServer version)
class_person AUX Visual-inspection classification (0=not inspected or unknown, 1=star, 2=narrow emission-line galaxy, 3=QSO, 4=galaxy)
platerun AUX Drilling run that this plate was drilled in
fracnsiglo AUX Fraction of pixels low by more than N sigma relative to best-fit (for 1,2,..,10 sigma)
spectrographid AUX Which spectrograph (1 or 2)
eboss_target0 AUX SEQUELS, TDSS and SPIDERS target selection flags
elodie_teff AUX Kelvin Effective temperature of ELODIE star
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)
plate AUX Plate number (each plate corresponds to an actual plug plate)
vdispnpix AUX Number of pixels overlapping the templates used in the velocity dispersion fit
chunk AUX Name of tiling chunk that this spectrum was tiled in (boss1, boss2, etc), important for tracking large-scale structure samples
sectarget AUX Deprecated version of secondary (calibration) target flags (meanings highly overloaded)
speclegacy AUX Set to 1 for primary SDSS Legacy program observation of object, 0 otherwise
firstrelease AUX Name of first release this PLATE, MJD, FIBERID, RUN2D was associated with
eboss_target2 AUX eBOSS, TDSS and SPIDERS target selection flags for main eBOSS survey
rchi2 AUX Reduced chi-squared of best fit
vdispdof AUX Number of degrees of freedom in velocity dispersion fit
deredsn2 AUX Dereddened overall signal-to-noise-squared measure for plate (only for BOSS spectrograph plates)
segue1_target1 AUX Primary (science) target flags for SEGUE-1 targets
mjd AUX days Modified Julian Day of observation
platequality AUX Final quality of plate this spectrum came from (good, marginal, or bad)
class_noqso AUX Spectroscopic classification for Z_NOQSO redshift
calibflux_ivar AUX nanomaggy-2 Inverse variances of ugriz fluxes used for calibrations
spectroflux_ivar AUX nanomaggy-2 Inverse variance of spectrum projected onto ugriz filters

Data Set: BOSS-DR16, SPECTRA fields

Name Storage Units Description Default All
mask SPECTRA and_mask
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
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
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

Data Set: DESI-DR1, AUX fields

Name Storage Units Description Default All
tsnr2_lya AUX LYA template (S/N)^2 summed over B,R,Z
deltachi2 AUX Delta-chi-squared for template fit from Redrock
scnd_target AUX Target selection bitmask for secondary programs
coadd_numtile AUX Number of different tiles included in the coadd for this target
coeff AUX Redrock template coefficients
coadd_numnight AUX Number of different nights included in the coadd for this target
tsnr2_gpbdark AUX GPBDARK template (S/N)^2 summed over BRZ
main_primary AUX Boolean flag (True/False) for the primary coadded spectrum in Main survey
subpriority AUX Random subpriority [0-1] to break assignment ties
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
desiname AUX DESI JXXX.XXXX[+/-]YY.YYYY where X, Y are TARGET_{RA, DEC} truncated to 4 decimals
spgrpval AUX Value corresponding to the grouping type indicated in the spgrp column. This is the same as the healpix column
npixels AUX Number of unmasked wavelengths that contributed to the redshift fit
obsconditions AUX Bit-coded of allowed observing conditions
sv1_bgs_target AUX BGS (bright time program) target selection bitmask for SV1
cmx_target AUX Target selection bitmask for commissioning
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)
fa_type AUX Fiberassign internal target type (science, standard, sky, safe, suppsky)
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

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
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
wavelength SPECTRA AA Wavelength in units of Angstroms
wave_sigma SPECTRA AA Line-spread function width (sigma of approximating Gaussian) in units of Angstroms
mask SPECTRA Mask value

Data Set: DESI-EDR, AUX fields

Name Storage Units Description Default All
objtype AUX Object type: TGT, SKY, NON, BAD
obsconditions AUX Bit-coded of allowed observing conditions
plate_dec AUX deg Declination to be used by PlateMaker
plate_ra AUX deg Right Ascension to be used by PlateMaker
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
priority_init AUX Target initial priority from target selection bitmasks and OBSCONDITIONS
program AUX DESI program type - BRIGHT, DARK, BACKUP, OTHER
ref_epoch AUX year Reference epoch for Gaia/Tycho astrometry. Typically 2015.5 for Gaia
rms_delta_x AUX mm RMS (over exposures) of the 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
scnd_target AUX Target selection bitmask for secondary programs
spgrpval AUX Value corresponding to the grouping type indicated in the spgrp column. This is the same as the healpix column
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
subpriority AUX Random subpriority [0-1] to break assignment ties
subtype AUX Spectral subtype
survey AUX Survey name
sv1_bgs_target AUX BGS (bright time program) target selection bitmask for SV1
sv1_desi_target AUX DESI (dark time program) target selection bitmask for SV1
sv1_mws_target AUX MWS (bright time program) target selection bitmask for SV1
sv1_scnd_target AUX Secondary target selection bitmask for SV1
sv2_bgs_target AUX BGS (bright time program) target selection bitmask for SV2
sv2_desi_target AUX DESI (dark time program) target selection bitmask for SV2
sv2_mws_target AUX MWS (bright time program) target selection bitmask for SV2

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)