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
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
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
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
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 Secondary (calibration) 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: BOSS-DR16, SPECTRA fields

Name Storage Units Description Default All
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
sky SPECTRA 1e-17 erg cm-2 s-1 AA-1 Subtracted sky flux
model SPECTRA 1e-17 erg cm-2 s-1 AA-1 Pipeline best model fit used for classification and redshift
mask SPECTRA and_mask
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-DR1, AUX fields

Name Storage Units Description Default All
tsnr2_lrg AUX LRG template (S/N)^2 summed over B,R,Z
tsnr2_lya AUX LYA template (S/N)^2 summed over B,R,Z
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_fiber_dec AUX deg Mean (over exposures) DEC of actual fiber position
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_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
mws_target AUX Milky Way Survey targeting bits
sv1_mws_target AUX MWS (bright time program) target selection bitmask for SV1
sv2_mws_target AUX MWS (bright time program) target selection bitmask for SV2
sv3_mws_target AUX MWS (bright time program) target selection bitmask for SV3
main_nspec AUX Number of coadded spectra for this TARGETID in Main survey
sv_nspec AUX Number of coadded spectra for this TARGETID in SV (SV1+2+3)
zcat_nspec AUX Number of coadded spectra for this TARGETID in this zcatalog
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
coadd_numexp AUX Number of exposures included in the coadd for this target
ncoeff AUX Number of Redrock template coefficients
npixels AUX Number of unmasked wavelengths that contributed to the redshift fit
objtype AUX Object type: TGT, SKY, NON, BAD
tsnr2_qso AUX QSO template (S/N)^2 summed over B,R,Z
subpriority AUX Random subpriority [0-1] to break assignment ties
coeff AUX Redrock template coefficients
pmdec AUX mas year-1 Reference catalog proper motion in the Dec direction

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
wavelength SPECTRA AA Wavelength in units of Angstroms
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
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
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
flux SPECTRA 1e-17 erg cm-2 s-1 AA-1 Coadded calibrated flux
wavelength SPECTRA AA Wavelength 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)