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
extra_files CORE Additional files read for ingest
redshift_warning CORE Bitmask with warning on redshift result
datasetgroup CORE [Categorical] Common name for a coherent set of spectra published as a single release (e.g., SDSS_BOSS)
data_release CORE [Categorical] Data release of a given record (with a common data structure, e.g., SDSS-DR16, BOSS-DR16)
instrument CORE [Categorical] Instrument used for observation
site CORE [Categorical] Site of observations
spectype CORE [Categorical] Spectral type of the object (STAR, GALAXY, QSO)
telescope CORE [Categorical] Telescope used for the observation
dateobs_center CORE Central value of the dateobs range
targetid CORE Dataset-specific photometric target identifier
specid CORE Dataset-specific spectrum identifier (may not be unique)
updated CORE Date and time when the record was created/updated
dec CORE deg Declination in degrees
exptime CORE second Exposure time in seconds
file CORE File used for this record
wavemax CORE AA Maximum value of wavelength coverage in Angstroms
redshift CORE Measured redshift, or radial velocity in units of redshift
wavemin CORE AA Minimum value of wavelength coverage in Angstroms
dateobs CORE Range of observational dates for a given spectrum (single value for a single date)
ra CORE deg Right Ascension in degrees
redshift_err CORE Uncertainty on the measured redshift, or radial velocity in units of redshift
sparcl_id CORE Universally Unique Identifier for spectrum in SPARCL
specprimary CORE Whether an entry is the primary spectrum for a given target object
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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
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
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); 0 means everything is OK

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_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
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)
subpriority AUX Random subpriority [0-1] to break assignment ties
tsnr2_lya AUX LYA template (S/N)^2 summed over B,R,Z
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
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
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
tsnr2_gpbdark AUX GPBDARK template (S/N)^2 summed over BRZ
sv_primary AUX Boolean flag (True/False) for the primary coadded spectrum in SV (SV1+2+3)
sv3_desi_target AUX DESI (dark time program) target selection bitmask for SV3
tsnr2_gpbbackup AUX GPBBACKUP template (S/N)^2 summed over BRZ
survey AUX Survey name
sv3_mws_target AUX MWS (bright time program) target selection bitmask for SV3
zcat_nspec AUX Number of coadded spectra for this TARGETID in this zcatalog
objtype AUX Object type: TGT, SKY, NON, BAD
ncoeff AUX Number of Redrock template coefficients
npixels AUX Number of unmasked wavelengths that contributed to the redshift fit

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
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)
boss_target2 AUX Always set to zero (placeholder for BOSS target flags never used)
spectrosynflux AUX nanomaggy Best-fit template spectrum projected onto ugriz filters
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
subclass AUX Best spectroscopic subclassification
ancillary_target1 AUX BOSS ancillary science target selection information at plate design
ancillary_target2 AUX BOSS ancillary target selection information at plate design
elodie_bv AUX mag (B-V) color index for ELODIE star
vdispchi2 AUX Chi-squared for best-fit velocity dispersion
tcolumn AUX Columns of template files that correspond to each template
wcoverage AUX Coverage in wavelength, in units of log10 wavelength
elodie_dof AUX Degrees of freedom in fit to best ELODIE star
sectarget AUX Deprecated version of secondary (calibration) target flags (meanings highly overloaded)
deredsn2 AUX Dereddened overall signal-to-noise-squared measure for plate (only for BOSS spectrograph plates)
designid AUX Design identification number for plate
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
platerun AUX Drilling run that this plate was drilled in
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_teff AUX Kelvin Effective temperature of ELODIE star
lambda_eff AUX AA Effective wavelength drilling position was optimized for
elodie_sptype AUX ELODIE star spectral type
vdispz_err AUX Error in redshift associated with best-fit velocity dispersion

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)