SPARCL - Field Names

Field Names

(SDSS-DR16)

Storage Field Units Description Default All
A cz z of Normal unit vector in J2000 False True
A special_target2 Secondary (calibration) target flags for SDSS-I and SDSS-II special program targets False True
A eboss_target_id EBOSS unique target identifier for every spectroscopic target False True
A thing_id Resolve THING_ID in SDSS imaging for best positional match False True
A run1d Spectroscopic 1D reduction (redshift and classification) name False True
A targetobjid Unique database ID of targeting object based on RUN, RERUN, CAMCOl, FIELD, ID (same as SkyServer version) False True
A targettype General type of target (SCIENCE, STANDARD, or SKY) False True
A legacy_target2 Secondary (calibration) target flags for SDSS-I and SDSS-II Legacy survey False True
A spectrographid Which spectrograph (1 or 2) False True
A vdispz_err Error in redshift associated with best-fit velocity dispersion False True
A zoffset microns Washer thickness used (for backstopping BOSS quasar targets, so they are closer to 4000 Angstrom focal plan False True
A eboss_target1 eBOSS, TDSS and SPIDERS target selection flags for main eBOSS survey False True
A chi68p 68-th percentile value of abs(chi) of the best-fit synthetic spectrum to the actual spectrum (around 1.0 for a good fit) False True
A segue2_target1 Primary (science) target flags for SEGUE-2 targets False True
A firstrelease Name of first release this PLATE, MJD, FIBERID, RUN2D was associated with False True
A eboss_target0 SEQUELS, TDSS and SPIDERS target selection flags False True
A fiberid Fiber number False True
A specboss Set to 1 for primary BOSS spectrograph observation of object, 0 otherwise False True
A z_conf_person Visual-inspection confidence (0=not inspected or no confidence, 1,2=low confidence, 3,4=high confidence) False True
A programname Program within each survey that the plate was part of False True
A marvels_target2 Secondary (calibration) target flags for MARVELS targets False True
A yfocal mm Hole position on plate (+Y = +DEC) False True
A elodie_feh Metallicity [Fe/H] of ELODIE star False True
A segue1_target1 Primary (science) target flags for SEGUE-1 targets False True
A elodie_z_modelerr Standard deviation in redshift among the 12 best-fit ELODIE stars False True
A specsegue Set to 1 for primary SDSS SEGUE program observation of object (including SEGUE-1 and SEGUE-2), 0 otherwise False True
A boss_target1 Primary (science) target flags for BOSS targets False True
A elodie_dof Degrees of freedom in fit to best ELODIE star False True
A specsegue1 Set to 1 for primary SDSS SEGUE-1 program observation of object, 0 otherwise False True
A spec2_i Signal-to-noise squared for spectrograph #2, at i=19.90 for SDSS spectrograph spectra, i=20.20 for BOSS spectrograph spectra False True
A tile Tile number (each tile can have several plates drilled for it) False True
A rchi2diff_noqso Difference in reduced chi-squared between best and second best fit for Z_NOQSO redshift False True
A boss_target2 Always set to zero (placeholder for BOSS target flags never used) False True
A class_noqso Spectroscopic classification for Z_NOQSO redshift False True
A rchi2diff Difference in reduced chi-squared between best and second best fit False True
A elodie_logg log10(gravity) of ELODIE star False True
A elodie_bv mag (B-V) color index for ELODIE star False True
A segue2_target2 Secondary (calibration) target flags for SEGUE-2 targets False True
A snturnoff Signal to noise measure for MS turnoff stars on plate (-9999 if not appropriate) False True
A class_person Visual-inspection classification (0=not inspected or unknown, 1=star, 2=narrow emission-line galaxy, 3=QSO, 4=galaxy) False True
A thing_id_targeting Resolve THING_ID in SDSS imaging for targeted object False True
A npoly Number of polynomial terms in fit False True
A elodie_teff Kelvin Effective temperature of ELODIE star False True
A spec2_g Signal-to-noise squared for spectrograph #2, at g=20.20 for SDSS spectrograph spectra, g=21.20 for BOSS spectrograph spectra False True
A fluxobjid Unique database ID of flux-based photometric match based on RUN, RERUN, CAMCOl, FIELD, ID (same as SkyServer version) False True
A vdispchi2 Chi-squared for best-fit velocity dispersion False True
A anyormask For each bit, records whether any pixel in the spectrum has that bit set in its ORMASK False True
A spectroflux_ivar nanomaggies^-2 Inverse variance of spectrum projected onto ugriz filters False True
A plate Plate number (each plate corresponds to an actual plug plate) False True
A marvels_target1 Primary (science) target flags for MARVELS targets False True
A boss_specobj_id Identification number internal to BOSS for SPECBOSS=1 objects False True
A special_target1 Primary (science) target flags for SDSS-I and SDSS-II special program targets False True
A objid SDSS photometric object identification numbers (RUN, RERUN, CAMCOL, FIELD, ID) False True
A dof Number of degrees of freedom in best fit False True
A calibflux nanomaggies ugriz fluxes used for calibrations False True
A lambda_eff Angstroms Effective wavelength drilling position was optimized for False True
A vdispnpix Number of pixels overlapping the templates used in the velocity dispersion fit False True
A z_person Visual-inspection redshift False True
A spectroflux nanomaggies Spectrum projected onto ugriz filters False True
A xfocal mm Hole position on plate (+X = +RA) False True
A fracnsiglo Fraction of pixels low by more than N sigma relative to best-fit (for 1,2,..,10 sigma) False True
A sn_median Median signal-to-noise per pixel within each of the ugriz bandpasses False True
A anyandmask For each bit, records whether any pixel in the spectrum has that bit set in its ANDMASK False True
A spec1_r Signal-to-noise squared for spectrograph #1, at r=20.25 for SDSS spectrograph spectra, r=20.20 for BOSS spectrograph spectra False True
A elodie_object Star name for ELODIE star False True
A segue1_target2 Primary (science) target flags for SEGUE-1 targets False True
A speclegacy Set to 1 for primary SDSS Legacy program observation of object, 0 otherwise False True
A spectrosynflux_ivar nanomaggies^-2 Inverse variance of best-fit template spectrum projected onto ugriz filters False True
A legacy_target1 Primary (science) target flags for SDSS-I and SDSS-II Legacy survey False True
A designid Design identification number for plate False True
A ancillary_target2 BOSS ancillary target selection information at plate design False True
A elodie_rchi2 Reduced chi-squared of fit to best ELODIE star False True
A eboss_target2 eBOSS, TDSS and SPIDERS target selection flags for main eBOSS survey False True
A platequality Final quality of plate this spectrum came from (good, marginal, or bad) False True
A platesn2 Overall signal-to-noise-squared measure for plate (only for SDSS spectrograph plates) False True
A spec1_i Signal-to-noise squared for spectrograph #1, at i=19.90 for SDSS spectrograph spectra, i=20.20 for BOSS spectrograph spectra False True
A comments_person Visual-inspection comments False True
A tcolumn Columns of template files that correspond to each template False True
A z_err_noqso Error in Z_NOQSO redshift False True
A platerun Drilling run that this plate was drilled in False True
A run2d Spectroscopic 2D reduction (extraction of spectra) name False True
A subclass Best spectroscopic subclassification False True
A plateid Unique database ID of plate based on PLATE, MJD, RUN2D (same as SkyServer version) False True
A vdispz Redshift associated with best-fit velocity dispersion False True
A mjd Modified Julian Day of observation False True
A tfile File that best fit template comes from in idlspec2d product False True
A spec1_g Signal-to-noise squared for spectrograph #1, at g=20.20 for SDSS spectrograph spectra, g=21.20 for BOSS spectrograph spectra False True
A cy y of Normal unit vector in J2000 False True
A sn_median_all Median signal-to-noise per pixel across full spectrum False True
A vdispdof Number of degrees of freedom in velocity dispersion fit False True
A nspecobs Number of spectroscopic observations of this source False True
A bluefiber 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) False True
A sourcetype String expressing type of source (similar to OBJTYPE in DR8 and earlier) False True
A spec2_r Signal-to-noise squared for spectrograph #2, at r=20.25 for SDSS spectrograph spectra, r=20.20 for BOSS spectrograph spectra False True
A elodie_z_err Error in redshift fit to ELODIE star False True
A ancillary_target1 BOSS ancillary science target selection information at plate design False True
A specsdss Set to 1 for primary SDSS spectrograph observation of object, 0 otherwise False True
A wcoverage Coverage in wavelength, in units of log10 wavelength False True
A spectrosynflux nanomaggies Best-fit template spectrum projected onto ugriz filters False True
A rchi2 Reduced chi-squared of best fit False True
A elodie_filename File name for best-fit ELODIE star False True
A vdisp km/s Velocity dispersion False True
A fracnsighi Fraction of pixels high by more than N sigma relative to best-fit (for 1,2,..,10 sigma) False True
A z_noqso 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 False True
A deredsn2 Dereddened overall signal-to-noise-squared measure for plate (only for BOSS spectrograph plates) False True
A elodie_z Redshift fit to ELODIE star False True
A vdisp_err km/s Error in velocity dispersion False True
A elodie_sptype ELODIE star spectral type False True
A sectarget Deprecated version of secondary (calibration) target flags (meanings highly overloaded) False True
A specsegue2 Set to 1 for primary SDSS SEGUE-2 program observation of object, 0 otherwise False True
A subclass_noqso Spectroscopic subclassification for Z_NOQSO redshift False True
A calibflux_ivar nanomaggies^-2 Inverse variances of ugriz fluxes used for calibrations False True
A nturnoff Number of stars used for SNTURNOFF determination False True
A fracnsigma Fraction of pixels deviant by more than N sigma relative to best-fit (for 1,2,..,10 sigma) False True
A spectroskyflux nanomaggies Sky flux in each of the ugriz imaging filters False True
A chunk Name of tiling chunk that this spectrum was tiled in (boss1, boss2, etc), important for tracking large-scale structure samples False True
A cx x of Normal unit vector in J2000 False True
A theta Template coefficients of best fit False True
A zwarning_noqso Warnings in z_noqso redshift (BOSS spectra only) False True
A primtarget Target selection information at plate design, primary science selection (for backwards compatibility) False True
A survey Survey name False True
C ra deg Right Ascension in degrees True True
C dateobs Range of observational dates for a given spectrum (single value for a single date) False True
C redshift_warning Bitmask with warning on redshift result False True
C dateobs_center Central value of the dateobs range False True
C updated Date and time when the record was created/updated False False
C site Site of observations False True
C datasetgroup Common name for a coherent set of spectra published as a single release (e.g., SDSS_BOSS-DR16) False True
C specid Dataset-specific spectrum identifier (may not be unique) True True
C instrument Instrument used for observation False True
C redshift Measured redshift, or radial velocity in units of redshift False True
C filename Basename of ingested file. Prepend with "dirpath" for full absolute path False False
C targetid Dataset-specific photometric target identifier False True
C specprimary Whether an entry is the primary spectrum for a given target object False True
C dirpath Full path of ingested file directory (mostly for internal use) False False
C data_release Data release of a given record (with a common data structure, e.g., SDSS-DR16, BOSS-DR16) False True
C wavemin Å Minimum value of wavelength coverage in Angstroms False True
C spectype Spectral type of the object (STAR, GALAXY, QSO) False True
C filesize bytes Size of the file False False
C dec deg Declination in degrees True True
C telescope Telescope used for the observation False True
C redshift_err Uncertainty on the measured redshift, or radial velocity in units of redshift False True
C wavemax Å Maximum value of wavelength coverage in Angstroms False True
C sparcl_id Universally Unique Identifier for spectrum in SPARCL True True
C extra_files Additional files read for ingest False False
C exptime sec Exposure time in seconds False True
S model 10^-17 ergs/s/cm^2/Å Pipeline best model fit used for classification and redshift False True
S sky 10^-17 ergs/s/cm^2/Å Subtracted sky flux False True
S flux 10^-17 ergs/s/cm^2/Å Coadded calibrated flux True True
S wave_sigma pixels Line-spread function width (sigma of approximating Gaussian) in units of number of pixel False True
S ivar flux^-2 Inverse variance of flux False True
S wavelength Å Wavelength in units of Angstroms True True
S mask and_mask False True

Legend

CCORE field
SSPECTRA field
AAUX field

NSF NOIRLab

AURA CSDC


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datalab-spectro@noirlab.edu
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