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
special_target2 AUX Secondary (calibration) target flags for SDSS-I and SDSS-II special program targets
eboss_target_id AUX EBOSS unique target identifier for every spectroscopic target
thing_id AUX Resolve THING_ID in SDSS imaging for best positional match
run1d AUX Spectroscopic 1D reduction (redshift and classification) name
targetobjid AUX Unique database ID of targeting object based on RUN, RERUN, CAMCOl, FIELD, ID (same as SkyServer version)
targettype AUX General type of target (SCIENCE, STANDARD, or SKY)
legacy_target2 AUX Secondary (calibration) target flags for SDSS-I and SDSS-II Legacy survey
spectrographid AUX Which spectrograph (1 or 2)
vdispz_err AUX Error in redshift associated with best-fit velocity dispersion
zoffset AUX micron Washer thickness used for backstopping BOSS quasar targets, so they are closer to 4000 Angstrom focal plan
eboss_target1 AUX eBOSS, TDSS and SPIDERS target selection flags for main eBOSS survey
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)
segue2_target1 AUX Primary (science) target flags for SEGUE-2 targets
firstrelease AUX Name of first release this PLATE, MJD, FIBERID, RUN2D was associated with
eboss_target0 AUX SEQUELS, TDSS and SPIDERS target selection flags
fiberid AUX Fiber number
specboss AUX Set to 1 for primary BOSS spectrograph observation of object, 0 otherwise
z_conf_person AUX Visual-inspection confidence (0=not inspected or no confidence, 1,2=low confidence, 3,4=high confidence)
programname AUX Program within each survey that the plate was part of
marvels_target2 AUX Secondary (calibration) target flags for MARVELS targets
yfocal AUX mm Hole position on plate (+Y = +DEC)
elodie_feh AUX Metallicity [Fe/H] of ELODIE star
segue1_target1 AUX Primary (science) target flags for SEGUE-1 targets
elodie_z_modelerr AUX Standard deviation in redshift among the 12 best-fit ELODIE stars
cz AUX z of Normal unit vector in J2000

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
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
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
tsnr2_qso AUX QSO template (S/N)^2 summed over B,R,Z
tsnr2_elg AUX ELG template (S/N)^2 summed over B,R,Z
mean_fiber_ra AUX deg Mean (over exposures) RA of actual fiber position
sv1_desi_target AUX DESI (dark time program) target selection bitmask for SV1
mean_delta_x AUX mm Mean (over exposures) fiber difference between measured and requested CS5 X location on focal plane
healpix AUX HEALPixel containing this location at NSIDE=64 in the NESTED scheme
fa_target AUX Targeting bit internally used by fiberassign (linked with FA_TYPE)
tsnr2_bgs AUX BGS template (S/N)^2 summed over B,R,Z
mean_mjd AUX days Mean (over exposures) of the Modified Julian Date (MJD) when the shutter was opened
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
plate_dec AUX deg Declination to be used by PlateMaker
main_primary AUX Boolean flag (True/False) for the primary coadded spectrum in Main survey
mean_fiber_dec AUX deg Mean (over exposures) DEC of actual fiber position
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

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
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)