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
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
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 ✘ ✔
flux SPECTRA 1e-17 erg cm-2 s-1 AA-1 Coadded calibrated flux ✔ ✔
wave_sigma SPECTRA pixel Line-spread function width (sigma of approximating Gaussian) in units of number of pixel ✘ ✔
ivar SPECTRA 1e+34 cm4 s2 AA2 erg-2 Inverse variance of flux ✘ ✔
wavelength SPECTRA AA Wavelength in units of Angstroms ✔ ✔
mask SPECTRA — and_mask ✘ ✔

Data Set: BOSS-DR16, AUX fields

Name Storage Units Description Default All
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 ✘ ✔
fracnsighi AUX — Fraction of pixels high by more than N sigma relative to best-fit (for 1,2,..,10 sigma) ✘ ✔

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 ✔ ✔
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-DR1, AUX fields

Name Storage Units Description Default All
chi2 AUX — Best fit chi-squared ✘ ✔
bgs_target AUX — BGS (Bright Galaxy Survey) target selection bitmask ✘ ✔
sv1_bgs_target AUX — BGS (bright time program) target selection bitmask for SV1 ✘ ✔
sv2_bgs_target AUX — BGS (bright time program) target selection bitmask for SV2 ✘ ✔
sv3_bgs_target AUX — BGS (bright time program) target selection bitmask for SV3 ✘ ✔
tsnr2_bgs AUX — BGS template (S/N)^2 summed over B,R,Z ✘ ✔
obsconditions AUX — Bit-coded of allowed observing conditions ✘ ✔
coadd_fiberstatus AUX — Bitwise AND of the FIBERSTATUS values of the spectra used in the coadd ✘ ✔
main_primary AUX — Boolean flag (True/False) for the primary coadded spectrum in Main survey ✘ ✔
sv_primary AUX — Boolean flag (True/False) for the primary coadded spectrum in SV (SV1+2+3) ✘ ✔
plate_dec AUX deg Declination to be used by PlateMaker ✘ ✔
deltachi2 AUX — Delta-chi-squared for template fit from Redrock ✘ ✔
desi_target AUX — DESI (dark time program) target selection bitmask ✘ ✔
sv1_desi_target AUX — DESI (dark time program) target selection bitmask for SV1 ✘ ✔
sv2_desi_target AUX — DESI (dark time program) target selection bitmask for SV2 ✘ ✔
sv3_desi_target AUX — DESI (dark time program) target selection bitmask for SV3 ✘ ✔
desiname AUX — DESI JXXX.XXXX[+/-]YY.YYYY where X, Y are TARGET_{RA, DEC} truncated to 4 decimals ✘ ✔
program AUX — DESI program type - BRIGHT, DARK, BACKUP, OTHER ✘ ✔
tsnr2_elg AUX — ELG template (S/N)^2 summed over B,R,Z ✘ ✔
fa_type AUX — Fiberassign internal target type (science, standard, sky, safe, suppsky) ✘ ✔
tsnr2_gpbbackup AUX — GPBBACKUP template (S/N)^2 summed over BRZ ✘ ✔
tsnr2_gpbbright AUX — GPBBRIGHT template (S/N)^2 summed over B,R,Z ✘ ✔
tsnr2_gpbdark AUX — GPBDARK template (S/N)^2 summed over BRZ ✘ ✔
healpix AUX — HEALPixel containing this location at NSIDE=64 in the NESTED scheme ✘ ✔
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
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
chi2 AUX — Best fit chi-squared ✘ ✔
bgs_target AUX — BGS (Bright Galaxy Survey) target selection bitmask ✘ ✔
sv1_bgs_target AUX — BGS (bright time program) target selection bitmask for SV1 ✘ ✔
sv2_bgs_target AUX — BGS (bright time program) target selection bitmask for SV2 ✘ ✔
sv3_bgs_target AUX — BGS (bright time program) target selection bitmask for SV3 ✘ ✔
tsnr2_bgs AUX — BGS template (S/N)^2 summed over B,R,Z ✘ ✔
obsconditions AUX — Bit-coded of allowed observing conditions ✘ ✔
coadd_fiberstatus AUX — Bitwise AND of the FIBERSTATUS values of the spectra used in the coadd ✘ ✔
sv_primary AUX — Boolean flag (True/False) for the primary coadded spectrum in SV (SV1+2+3) ✘ ✔
plate_dec AUX deg Declination to be used by PlateMaker ✘ ✔
deltachi2 AUX — Delta-chi-squared for template fit from Redrock ✘ ✔
desi_target AUX — DESI (dark time program) target selection bitmask ✘ ✔
sv1_desi_target AUX — DESI (dark time program) target selection bitmask for SV1 ✘ ✔
sv2_desi_target AUX — DESI (dark time program) target selection bitmask for SV2 ✘ ✔
sv3_desi_target AUX — DESI (dark time program) target selection bitmask for SV3 ✘ ✔
program AUX — DESI program type - BRIGHT, DARK, BACKUP, OTHER ✘ ✔
tsnr2_elg AUX — ELG template (S/N)^2 summed over B,R,Z ✘ ✔
fa_type AUX — Fiberassign internal target type (science, standard, sky, safe, suppsky) ✘ ✔
firstnight AUX — First calendar date of the exposures used in the coadded spectrum as YYYYMMDD of the beginning of the observing night ✘ ✔
tsnr2_gpbbackup AUX — GPBBACKUP template (S/N)^2 summed over BRZ ✘ ✔
tsnr2_gpbbright AUX — GPBBRIGHT template (S/N)^2 summed over B,R,Z ✘ ✔
tsnr2_gpbdark AUX — GPBDARK template (S/N)^2 summed over BRZ ✘ ✔
healpix AUX — HEALPixel containing this location at NSIDE=64 in the NESTED scheme ✘ ✔
numobs_init AUX — Initial number of observations for target calculated across target selection bitmasks and OBSCONDITIONS ✘ ✔
lastnight AUX — Last calendar date of the exposures used in the coadded spectrum as YYYYMMDD of the beginning of the observing night ✘ ✔

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)

NSF NOIRLab

AURA CSDC


For further information, contact:
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