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
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_target0 AUX — SEQUELS, TDSS and SPIDERS target selection flags ✘ ✔
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 ✘ ✔

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
eboss_target_id AUX — EBOSS unique target identifier for every spectroscopic target ✘ ✔
anyandmask AUX — For each bit, records whether any pixel in the spectrum has that bit set in its ANDMASK ✘ ✔
boss_specobj_id AUX — Identification number internal to BOSS for SPECBOSS=1 objects ✘ ✔
marvels_target2 AUX — Secondary (calibration) target flags for MARVELS targets ✘ ✔
sourcetype AUX — String expressing type of source (similar to OBJTYPE in DR8 and earlier) ✘ ✔
boss_target2 AUX — Always set to zero (placeholder for BOSS target flags never used) ✘ ✔
ancillary_target1 AUX — BOSS ancillary science target selection information at plate design ✘ ✔
cz AUX — z of Normal unit vector in J2000 ✘ ✔
primtarget AUX — Target selection information at plate design, primary science selection (for backwards compatibility) ✘ ✔
targettype AUX — General type of target (SCIENCE, STANDARD, or SKY) ✘ ✔
vdispdof AUX — Number of degrees of freedom in velocity dispersion fit ✘ ✔
comments_person AUX — Visual-inspection comments ✘ ✔
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 ✘ ✔
segue2_target1 AUX — Primary (science) target flags for SEGUE-2 targets ✘ ✔
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 ✘ ✔
specsegue2 AUX — Set to 1 for primary SDSS SEGUE-2 program observation of object, 0 otherwise ✘ ✔
ancillary_target2 AUX — BOSS ancillary target selection information at plate design ✘ ✔
cy AUX — y of Normal unit vector in J2000 ✘ ✔
legacy_target2 AUX — Secondary (calibration) target flags for SDSS-I and SDSS-II Legacy survey ✘ ✔
specsegue AUX — Set to 1 for primary SDSS SEGUE program observation of object (including SEGUE-1 and SEGUE-2), 0 otherwise ✘ ✔
plateid AUX — Unique database ID of plate based on PLATE, MJD, RUN2D (same as SkyServer version) ✘ ✔
spec1_i AUX — Signal-to-noise squared for spectrograph #1, at i=19.90 for SDSS spectrograph spectra, i=20.20 for BOSS spectrograph spectra ✘ ✔
specboss AUX — Set to 1 for primary BOSS spectrograph observation of object, 0 otherwise ✘ ✔
elodie_rchi2 AUX — Reduced chi-squared of fit to best ELODIE star ✘ ✔

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
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
wavelength SPECTRA AA Wavelength in units of Angstroms ✔ ✔
model SPECTRA 1e-17 erg cm-2 s-1 AA-1 Pipeline best model fit ✘ ✔
mask SPECTRA — Mask value ✘ ✔
wave_sigma SPECTRA AA Line-spread function width (sigma of approximating Gaussian) 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 ✔ ✔

Data Set: DESI-EDR, 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 ✘ ✔
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) ✘ ✔
firstnight AUX — First 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 ✘ ✔
lastnight AUX — Last calendar date of the exposures used in the coadded spectrum as YYYYMMDD of the beginning of the observing night ✘ ✔
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 ✘ ✔
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
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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