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

Data Set: BOSS-DR16, 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: 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: SDSS-DR16, 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-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: SDSS-DR17, AUX fields

Name Storage Units Description Default All
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 ✘ ✔
rchi2 AUX — Reduced chi-squared of best fit ✘ ✔
elodie_filename AUX — File name for best-fit ELODIE star ✘ ✔
fracnsighi AUX — Fraction of pixels high by more than N sigma relative to best-fit (for 1,2,..,10 sigma) ✘ ✔
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 ✘ ✔
deredsn2 AUX — Dereddened overall signal-to-noise-squared measure for plate (only for BOSS spectrograph plates) ✘ ✔
elodie_z AUX — Redshift fit to ELODIE star ✘ ✔
elodie_sptype AUX — ELODIE star spectral type ✘ ✔
sectarget AUX — Deprecated version of secondary (calibration) target flags (meanings highly overloaded) ✘ ✔
specsegue2 AUX — Set to 1 for primary SDSS SEGUE-2 program observation of object, 0 otherwise ✘ ✔
subclass_noqso AUX — Spectroscopic subclassification for Z_NOQSO redshift ✘ ✔
nturnoff AUX — Number of stars used for SNTURNOFF determination ✘ ✔
fracnsigma AUX — Fraction of pixels deviant by more than N sigma relative to best-fit (for 1,2,..,10 sigma) ✘ ✔

Data Set: SDSS-DR17, 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-EDR, AUX fields

Name Storage Units Description Default All
objtype AUX — Object type: TGT, SKY, NON, BAD ✘ ✔
obsconditions AUX — Bit-coded of allowed observing conditions ✘ ✔
plate_dec AUX deg Declination to be used by PlateMaker ✘ ✔
plate_ra AUX deg Right Ascension to be used by PlateMaker ✘ ✔
pmdec AUX mas year-1 Reference catalog proper motion in the Dec direction ✘ ✔
pmra AUX mas year-1 Reference catalog proper motion in the RA direction ✘ ✔
priority_init AUX — Target initial priority from target selection bitmasks and OBSCONDITIONS ✘ ✔
program AUX — DESI program type - BRIGHT, DARK, BACKUP, OTHER ✘ ✔
ref_epoch AUX year Reference epoch for Gaia/Tycho astrometry. Typically 2015.5 for Gaia ✘ ✔
rms_delta_x AUX mm RMS (over exposures) of the fiber difference between measured and requested CS5 X location on focal plane ✘ ✔
rms_delta_y AUX mm RMS (over exposures) of the fiber difference between measured and requested CS5 Y location on focal plane ✘ ✔
scnd_target AUX — Target selection bitmask for secondary programs ✘ ✔
spgrpval AUX — Value corresponding to the grouping type indicated in the spgrp column. This is the same as the healpix column ✘ ✔
std_fiber_dec AUX arcsec Standard deviation (over exposures) of DEC of actual fiber position ✘ ✔
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 ✘ ✔
subtype AUX — Spectral subtype ✘ ✔
survey AUX — Survey name ✘ ✔
sv1_bgs_target AUX — BGS (bright time program) target selection bitmask for SV1 ✘ ✔
sv1_desi_target AUX — DESI (dark time program) target selection bitmask for SV1 ✘ ✔
sv1_mws_target AUX — MWS (bright time program) target selection bitmask for SV1 ✘ ✔
sv1_scnd_target AUX — Secondary target selection bitmask for SV1 ✘ ✔
sv2_bgs_target AUX — BGS (bright time program) target selection bitmask for SV2 ✘ ✔
sv2_desi_target AUX — DESI (dark time program) target selection bitmask for SV2 ✘ ✔
sv2_mws_target AUX — MWS (bright time program) target selection bitmask for SV2 ✘ ✔

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 ✘ ✔
SPARCL Field Cat(alog)

NSF NOIRLab

AURA CSDC


For further information, contact:
datalab-spectro@noirlab.edu
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