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
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
comments_person AUX Visual-inspection comments
tcolumn AUX Columns of template files that correspond to each template
z_err_noqso AUX Error in Z_NOQSO redshift
platerun AUX Drilling run that this plate was drilled in
run2d AUX Spectroscopic 2D reduction (extraction of spectra) name
subclass AUX Best spectroscopic subclassification
plateid AUX Unique database ID of plate based on PLATE, MJD, RUN2D (same as SkyServer version)
vdispz AUX Redshift associated with best-fit velocity dispersion
mjd AUX days Modified Julian Day of observation
tfile AUX File that best fit template comes from in idlspec2d product
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
cy AUX y of Normal unit vector in J2000
sn_median_all AUX Median signal-to-noise per pixel across full spectrum
vdispdof AUX Number of degrees of freedom in velocity dispersion fit
nspecobs AUX Number of spectroscopic observations of this source
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)
sourcetype AUX String expressing type of source (similar to OBJTYPE in DR8 and earlier)
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
elodie_z_err AUX Error in redshift fit to ELODIE star
ancillary_target1 AUX BOSS ancillary science target selection information at plate design
specsdss AUX Set to 1 for primary SDSS spectrograph observation of object, 0 otherwise
wcoverage AUX Coverage in wavelength, in units of log10 wavelength
spectrosynflux AUX nanomaggy Best-fit template spectrum projected onto ugriz filters
rchi2 AUX Reduced chi-squared of best fit

Data Set: SDSS-DR16, SPECTRA fields

Name Storage Units Description Default All
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
model SPECTRA 1e-17 erg cm-2 s-1 AA-1 Pipeline best model fit used for classification and redshift
ivar SPECTRA 1e+34 cm4 s2 AA2 erg-2 Inverse variance of 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
mask SPECTRA and_mask

Data Set: BOSS-DR16, AUX fields

Name Storage Units Description Default All
run1d AUX Spectroscopic 1D reduction (redshift and classification) name
subclass AUX Best spectroscopic subclassification
rchi2diff_noqso AUX Difference in reduced chi-squared between best and second best fit for Z_NOQSO redshift
elodie_z_err AUX Error in redshift fit to ELODIE star
tfile AUX File that best fit template comes from in idlspec2d product
anyormask AUX For each bit, records whether any pixel in the spectrum has that bit set in its ORMASK
elodie_feh AUX Metallicity [Fe/H] of ELODIE star
elodie_bv AUX mag (B-V) color index for ELODIE star
lambda_eff AUX AA Effective wavelength drilling position was optimized for
boss_target1 AUX Primary (science) target flags for BOSS targets
dof AUX Number of degrees of freedom in best fit
platesn2 AUX Overall signal-to-noise-squared measure for plate (only for SDSS spectrograph plates)
vdispchi2 AUX Chi-squared for best-fit velocity dispersion
special_target1 AUX Primary (science) target flags for SDSS-I and SDSS-II special program targets
programname AUX Program within each survey that the plate was part of
calibflux AUX nanomaggy ugriz fluxes used for calibrations
zwarning_noqso AUX Warnings in z_noqso redshift (BOSS spectra only); 0 means everything is OK
theta AUX Template coefficients of best fit
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
objid AUX SDSS photometric object identification numbers (RUN, RERUN, CAMCOL, FIELD, ID)
segue1_target2 AUX Secondary (calibration) target flags for SEGUE-1 targets
segue2_target2 AUX Secondary (calibration) target flags for SEGUE-2 targets
spectroskyflux AUX nanomaggy Sky flux in each of the ugriz imaging filters
tcolumn AUX Columns of template files that correspond to each template
spectroflux AUX nanomaggy Spectrum projected onto ugriz filters

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
mean_delta_x AUX mm Mean (over exposures) fiber difference between measured and requested CS5 X location on focal plane
main_primary AUX Boolean flag (True/False) for the primary coadded spectrum in Main survey
main_nspec AUX Number of coadded spectra for this TARGETID in Main survey
healpix AUX HEALPixel containing this location at NSIDE=64 in the NESTED scheme
fa_type AUX Fiberassign internal target type (science, standard, sky, safe, suppsky)
fa_target AUX Targeting bit internally used by fiberassign (linked with FA_TYPE)
desi_target AUX DESI (dark time program) target selection bitmask
desiname AUX DESI JXXX.XXXX[+/-]YY.YYYY where X, Y are TARGET_{RA, DEC} truncated to 4 decimals
deltachi2 AUX Delta-chi-squared for template fit from Redrock
coeff AUX Redrock template coefficients
coadd_numtile AUX Number of different tiles included in the coadd for this target
coadd_numnight AUX Number of different nights included in the coadd for this target
coadd_numexp AUX Number of exposures included in the coadd for this target
coadd_fiberstatus AUX Bitwise AND of the FIBERSTATUS values of the spectra used in the coadd
cmx_target AUX Target selection bitmask for commissioning
chi2 AUX Best fit chi-squared
bgs_target AUX BGS (Bright Galaxy Survey) target selection bitmask

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
sv1_mws_target AUX MWS (bright time program) target selection bitmask for SV1
ref_epoch AUX year Reference epoch for Gaia/Tycho astrometry. Typically 2015.5 for Gaia
priority_init AUX Target initial priority from target selection bitmasks and OBSCONDITIONS
scnd_target AUX Target selection bitmask for secondary programs
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
sv_nspec AUX Number of coadded spectra for this TARGETID in SV (SV1+2+3)
pmra AUX mas year-1 Reference catalog proper motion in the RA direction
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
tsnr2_lya AUX LYA template (S/N)^2 summed over B,R,Z
plate_ra AUX deg Right Ascension to be used by PlateMaker
plate_dec AUX deg Declination to be used by PlateMaker
coadd_numexp AUX Number of exposures included in the coadd for this target
obsconditions AUX Bit-coded of allowed observing conditions
tsnr2_qso AUX QSO template (S/N)^2 summed over B,R,Z
pmdec AUX mas year-1 Reference catalog proper motion in the Dec direction
tsnr2_bgs AUX BGS template (S/N)^2 summed over B,R,Z
tsnr2_elg AUX ELG template (S/N)^2 summed over B,R,Z
sv1_bgs_target AUX BGS (bright time program) target selection bitmask for SV1
sv2_mws_target AUX MWS (bright time program) target selection bitmask for SV2
std_fiber_dec AUX arcsec Standard deviation (over exposures) of DEC of actual fiber position
sv2_scnd_target AUX Secondary target selection bitmask for SV2
sv1_desi_target AUX DESI (dark time program) target selection bitmask for SV1
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

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)