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
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
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
flux SPECTRA 1e-17 erg cm-2 s-1 AA-1 Coadded calibrated flux
wave_sigma SPECTRA pixel Line-spread function width (sigma of approximating Gaussian) in units of number of pixel
ivar SPECTRA 1e+34 cm4 s2 AA2 erg-2 Inverse variance of flux
wavelength SPECTRA AA Wavelength in units of Angstroms
mask SPECTRA and_mask

Data Set: BOSS-DR16, AUX fields

Name Storage Units Description Default All
npoly AUX Number of polynomial terms in fit
bluefiber AUX Set to 1 if this was requested to be a blue fiber target, 0 if it was a red fiber (in BOSS high redshift LRGs are requested to be on red fibers)
subclass_noqso AUX Spectroscopic subclassification for Z_NOQSO redshift
nspecobs AUX Number of spectroscopic observations of this source
elodie_filename AUX File name for best-fit ELODIE star
fluxobjid AUX Unique database ID of flux-based photometric match based on RUN, RERUN, CAMCOl, FIELD, ID (same as SkyServer version)
elodie_rchi2 AUX Reduced chi-squared of fit to best ELODIE star
xfocal AUX mm Hole position on plate (+X = +RA)
elodie_z AUX Redshift fit to ELODIE star
elodie_object AUX Star name for ELODIE star
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)
marvels_target1 AUX Primary (science) target flags for MARVELS targets
z_person AUX Visual-inspection redshift
spec2_i AUX Signal-to-noise squared for spectrograph #2, at i=19.90 for SDSS spectrograph spectra, i=20.20 for BOSS spectrograph spectra
sn_median_all AUX Median signal-to-noise per pixel across full spectrum
vdisp AUX km s-1 Velocity dispersion
legacy_target1 AUX Primary (science) target flags for SDSS-I and SDSS-II Legacy survey
eboss_target1 AUX eBOSS, TDSS and SPIDERS target selection flags for main eBOSS survey
specsdss AUX Set to 1 for primary SDSS spectrograph observation of object, 0 otherwise
cx AUX x of Normal unit vector in J2000
vdispz AUX Redshift associated with best-fit velocity dispersion
elodie_sptype AUX ELODIE star spectral type
rchi2diff AUX Difference in reduced chi-squared between best and second best fit
vdispz_err AUX Error in redshift associated with best-fit velocity dispersion

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
sv2_mws_target AUX MWS (bright time program) target selection bitmask for SV2
sv2_scnd_target AUX Secondary target selection bitmask for SV2
sv3_bgs_target AUX BGS (bright time program) target selection bitmask for SV3
sv3_desi_target AUX DESI (dark time program) target selection bitmask for SV3
sv3_mws_target AUX MWS (bright time program) target selection bitmask for SV3
sv3_scnd_target AUX Secondary target selection bitmask for SV3
sv_nspec AUX Number of coadded spectra for this TARGETID in SV (SV1+2+3)
sv_primary AUX Boolean flag (True/False) for the primary coadded spectrum in SV (SV1+2+3)
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
tsnr2_gpbbackup AUX GPBBACKUP template (S/N)^2 summed over BRZ
tsnr2_gpbbright AUX GPBBRIGHT template (S/N)^2 summed over B,R,Z
tsnr2_gpbdark AUX GPBDARK template (S/N)^2 summed over BRZ
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
tsnr2_qso AUX QSO template (S/N)^2 summed over B,R,Z
zcat_nspec AUX Number of coadded spectra for this TARGETID in this zcatalog

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
spgrpval AUX Value corresponding to the grouping type indicated in the spgrp column. This is the same as the healpix column
deltachi2 AUX Delta-chi-squared for template fit from Redrock
mws_target AUX Milky Way Survey targeting bits
tsnr2_gpbbright AUX GPBBRIGHT template (S/N)^2 summed over B,R,Z
rms_delta_y AUX mm RMS (over exposures) of the fiber difference between measured and requested CS5 Y location on focal plane
coeff AUX Redrock template coefficients
sv2_desi_target AUX DESI (dark time program) target selection bitmask for SV2
coadd_fiberstatus AUX Bitwise AND of the FIBERSTATUS values of the spectra used in the coadd
chi2 AUX Best fit chi-squared
subtype AUX Spectral subtype
cmx_target AUX Target selection bitmask for commissioning
program AUX DESI program type - BRIGHT, DARK, BACKUP, OTHER
mean_delta_x AUX mm Mean (over exposures) fiber difference between measured and requested CS5 X location on focal plane
coadd_numnight AUX Number of different nights included in the coadd for this target
tsnr2_lrg AUX LRG template (S/N)^2 summed over B,R,Z
sv2_bgs_target AUX BGS (bright time program) target selection bitmask for SV2
bgs_target AUX BGS (Bright Galaxy Survey) target selection bitmask
fa_target AUX Targeting bit internally used by fiberassign (linked with FA_TYPE)
numobs_init AUX Initial number of observations for target calculated across target selection bitmasks and OBSCONDITIONS
rms_delta_x AUX mm RMS (over exposures) of the fiber difference between measured and requested CS5 X location on focal plane
sv3_bgs_target AUX BGS (bright time program) target selection bitmask for SV3
sv1_scnd_target AUX Secondary target selection bitmask for SV1
coadd_numtile AUX Number of different tiles included in the coadd for this target
sv3_scnd_target AUX Secondary target selection bitmask for SV3
objtype AUX Object type: TGT, SKY, NON, BAD

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)