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Table: sdss_dr16.dr16q_superset

(The bold columns are indexed columns)

Column Name	Description	Datatype
ai_civ	Absorption index for C IV Lambda1549 region	DOUBLE
ai_siiv	Absorption index for Si IV Lambda1396 region	DOUBLE
ancillary_target1	BOSS target selection flag for ancillary programs	BIGINT
ancillary_target2	BOSS target selection flag for ancillary programs	BIGINT
autoclass_dr14q	Object classification based only on the DR14Q algorithm	CHAR
autoclass_pqn	Object classification post-QuasarNET	CHAR
bal_prob	BAL probability	DOUBLE
bi_civ	BALnicity index for C IV Lambda1549 region	DOUBLE
bi_siiv	BALnicity index for Si IV Lambda1396 region	DOUBLE
boss_target1	BOSS target selection for main survey	BIGINT
chunk	Name of tiling chunk (from platelist product)	CHAR
class_person	Object classification from visual inspection	INTEGER
conf_dla_1	Confidence of detection for damped LyAlpha features	DOUBLE
conf_dla_2	Confidence of detection for damped LyAlpha features	DOUBLE
conf_dla_3	Confidence of detection for damped LyAlpha features	DOUBLE
conf_dla_4	Confidence of detection for damped LyAlpha features	DOUBLE
conf_dla_5	Confidence of detection for damped LyAlpha features	DOUBLE
dec	Declination in decimal degrees (J2000)	DOUBLE
deltachi2_ciii	Delta Chi^2 for C III] Lambda1908 line redshift vs. cubic continuum fit	DOUBLE
deltachi2_civ	Delta Chi^2 for C IV Lambda1549 line redshift vs. cubic continuum fit	DOUBLE
deltachi2_halpha	Delta Chi^2 for HAlpha line redshift vs. cubic continuum fit	DOUBLE
deltachi2_hbeta	Delta Chi^2 for HBetha line redshift vs. cubic continuum fit	DOUBLE
deltachi2_lya	Delta Chi^2 for LyAlpha line redshift vs. cubic continuum fit	DOUBLE
deltachi2_mgii	Delta Chi^2 for Mg II Lambda2799 line redshift vs. cubic continuum fit	DOUBLE
deltachi2_pca	Delta Chi^2 for PCA redshift vs. cubic continuum fit	DOUBLE
disk_only	TRUE if the object is not listed in specobjall	CHAR
eboss_target0	Target selection flag for the eBOSS pilot survey (SEQUELS)	BIGINT
eboss_target1	eBOSS target selection flag	BIGINT
eboss_target2	eBOSS target selection flag	BIGINT
elat	Ecliptic Latitude	DOUBLE
elon	Ecliptic Longitude	DOUBLE
err_ai_civ	Uncertainty of absorption index for C IV Lambda1549 region	DOUBLE
err_ai_siiv	Uncertainty of absorption index for Si IV Lambda1396 region	DOUBLE
err_bi_civ	Uncertainty of BI for C IV Lambda1549 region	DOUBLE
err_bi_siiv	Uncertainty of BI for Si IV Lambda1396 region	DOUBLE
extinction_g	Galactic extinction in u, g, r, i, z bands	DOUBLE
extinction_i	Galactic extinction in u, g, r, i, z bands	DOUBLE
extinction_r	Galactic extinction in u, g, r, i, z bands	DOUBLE
extinction_u	Galactic extinction in u, g, r, i, z bands	DOUBLE
extinction_z	Galactic extinction in u, g, r, i, z bands	DOUBLE
fiberid	Fiber ID number	SMALLINT
glat	Galactic Latitude	DOUBLE
glon	Galactic Longitude	DOUBLE
htm9	HTM index (order 9 => ~10 arcmin size)	INTEGER
is_qso_10k	Binary flag for random set quasar identification	INTEGER
is_qso_dr12q	Flag indicating if an object was a quasar in DR12Q	INTEGER
is_qso_dr7q	Flag indicating if an object was a quasar in DR7Q	INTEGER
is_qso_final	Flag indicating quasars to be included in final catalog	INTEGER
is_qso_qn	Binary flag for QuasarNET quasar identification	INTEGER
lambda_eff	Wavelength to optimize hold location for, in Angstroms	DOUBLE
mjd	Modified Julian day of the spectroscopic observation	INTEGER
nest4096	HEALPIX index (Nsides 4096, Nest scheme => ~52 arcsec size	INTEGER
nhi_dla_1	Absorber column density for damped LyAlpha features	DOUBLE
nhi_dla_2	Absorber column density for damped LyAlpha features	DOUBLE
nhi_dla_3	Absorber column density for damped LyAlpha features	DOUBLE
nhi_dla_4	Absorber column density for damped LyAlpha features	DOUBLE
nhi_dla_5	Absorber column density for damped LyAlpha features	DOUBLE
nspec	Total number of additional observations	INTEGER
nspec_boss	Number of additional observations from BOSS/eBOSS	INTEGER
nspec_sdss	Number of additional observations from SDSS-I/II	INTEGER
objid	SDSS object identification number	CHAR
pipe_corr_10k	Binary flag indicating if the automated pipeline classification and redshift were correct in the random set	INTEGER
plate	Spectroscopic plate number	SMALLINT
platesn2	Overall (S/N)2 measure for plate, minimum of all 4 cameras	DOUBLE
prim_rec	Flag to indicate if observation is primary observation appearing in DR16Q or a duplicate	INTEGER
psfflux_g	Flux in u, g, r, i, z bands	DOUBLE
psfflux_i	Flux in u, g, r, i, z bands	DOUBLE
psfflux_ivar_g	Inverse variance of u, g, r, i, z fluxes	DOUBLE
psfflux_ivar_i	Inverse variance of u, g, r, i, z fluxes	DOUBLE
psfflux_ivar_r	Inverse variance of u, g, r, i, z fluxes	DOUBLE
psfflux_ivar_u	Inverse variance of u, g, r, i, z fluxes	DOUBLE
psfflux_ivar_z	Inverse variance of u, g, r, i, z fluxes	DOUBLE
psfflux_r	Flux in u, g, r, i, z bands	DOUBLE
psfflux_u	Flux in u, g, r, i, z bands	DOUBLE
psfflux_z	Flux in u, g, r, i, z bands	DOUBLE
psfmag_g	PSF magnitudes in u, g, r, i, z bands	DOUBLE
psfmag_i	PSF magnitudes in u, g, r, i, z bands	DOUBLE
psfmag_r	PSF magnitudes in u, g, r, i, z bands	DOUBLE
psfmag_u	PSF magnitudes in u, g, r, i, z bands	DOUBLE
psfmag_z	PSF magnitudes in u, g, r, i, z bands	DOUBLE
psfmagerr_g	Error of PSF magnitudes in u, g, r, i, z bands	DOUBLE
psfmagerr_i	Error of PSF magnitudes in u, g, r, i, z bands	DOUBLE
psfmagerr_r	Error of PSF magnitudes in u, g, r, i, z bands	DOUBLE
psfmagerr_u	Error of PSF magnitudes in u, g, r, i, z bands	DOUBLE
psfmagerr_z	Error of PSF magnitudes in u, g, r, i, z bands	DOUBLE
ra	Right ascension in decimal degrees (J2000)	DOUBLE
random_id	Random ID in the range 0.0 => 100.0	REAL
random_select	Binary flag indicating objects selected for random visual inspection	INTEGER
ring256	HEALPIX index (Nsides 256, Ring scheme => ~14 arcmin size)	INTEGER
run2d	Spectroscopic reduction version	CHAR
sdss_joinid	Unique ID based on PLATE, MJD, FIBERID for joining across data releases	BIGINT
sdss_name	SDSS-DR16 designation (hhmmss.ss+/-ddmmss.s, J2000)	CHAR
sn_median_all	Median S/N value of all good spectroscopic pixels	DOUBLE
specobjid	Unique database ID based on PLATE, MJD, FIBERID, RUN2D	BIGINT
thing_id	SDSS identifier	BIGINT
tile	Tile number	INTEGER
xfocal	Hole x-axis position in focal plane, in mm	DOUBLE
yfocal	Hole y-axis position in focal plane, in mm	DOUBLE
z	Best available redshift taken from Z_VI, Z_PIPE, Z_DR12Q, Z_DR7Q_SCH, Z_DR6Q_HW, and Z_10K	DOUBLE
z_10k	Redshift from visual inspection in random set	DOUBLE
z_ciii	PCA line redshift for C III] Lambda1908 from redvsblue	DOUBLE
z_civ	PCA line redshift for C IV Lambda1549 from redvsblue	DOUBLE
z_conf	Confidence rating for visual inspection redshift	INTEGER
z_conf_10k	Confidence rating for visual inspection redshift in random set	INTEGER
z_dla_1	Redshift for damped LyAlpha features	DOUBLE
z_dla_2	Redshift for damped LyAlpha features	DOUBLE
z_dla_3	Redshift for damped LyAlpha features	DOUBLE
z_dla_4	Redshift for damped LyAlpha features	DOUBLE
z_dla_5	Redshift for damped LyAlpha features	DOUBLE
z_dr12q	Redshift taken from DR12Q visual inspection	DOUBLE
z_dr6q_hw	Redshift taken from DR6 Hewett and Wild (2010) catalog	DOUBLE
z_dr7q_hw	Redshift using Hewett and Wild (2010) updates for DR7Q sources from the Shen et al. (2011) catalog	DOUBLE
z_dr7q_sch	Redshift taken from DR7Q Schneider et al (2010) catalog	DOUBLE
z_halpha	PCA line redshift for HAlpha from redvsblue	DOUBLE
z_hbeta	PCA line redshift for HBetha from redvsblue	DOUBLE
z_lya	PCA line redshift for LyAlpha from redvsblue	DOUBLE
z_mgii	PCA line redshift for Mg II Lambda2799 from redvsblue	DOUBLE
z_pca	PCA-derived systemic redshift from redvsblue	DOUBLE
z_pipe	SDSS automated pipeline redshift	DOUBLE
z_qn	Systemic redshift from QuasarNET	DOUBLE
z_vi	Visual inspection redshift	DOUBLE
zoffset	Backstopping offset distance, in microm	DOUBLE
zsource	Origin of the reported redshift in Z	CHAR
zwarn_ciii	Warning flag for C III] Lambda1908 redshift	BIGINT
zwarn_civ	Warning flag for C IV Lambda1549 redshift	BIGINT
zwarn_halpha	Warning flag for HAlpha redshift	BIGINT
zwarn_hbeta	Warning flag for HBetha redshift	BIGINT
zwarn_lya	Warning flag for LyAlpha redshift	BIGINT
zwarn_mgii	Warning flag for Mg II Lambda2799 redshift	BIGINT
zwarn_pca	Warning flag for redvsblue redshift	BIGINT
zwarning	Quality flag on the pipeline redshift estimate	INTEGER

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