Standard Column Descriptions

This file is an auto-generated version of column_descriptions.csv, which contains the descriptions of table column names regardless of what file(s) they appear in.

Name	Type	Units	Description	FullDescription
ABSMAG01_SDSS_G	float32	mag	g-corrected (to z=0.1) absolute magnitude in the SDSS g band from fastspecfit	g-corrected (to z=0.1) absolute magnitude in the SDSS g band from fastspecfit
ABSMAG01_SDSS_R	float32	mag	r-corrected (to z=0.1) absolute magnitude in the SDSS r band from fastspecfit	r-corrected (to z=0.1) absolute magnitude in the SDSS r band from fastspecfit
ABSMAG_R	float64	mag	Absolute r-band magnitude after k-correction	Absolute magnitude in the r-band after k-correction
AIRMASS	float32		Average airmass during this exposure	Average airmass during this exposure
AIRMASS_GFA	float64		Average airmass during this exposure from GFA	Average airmass during this exposure as measured by GFA
APFLUX_G	float32	nanomaggy	Total g-band flux within a 0.75 arcsec radius	Total flux in nanomaggies extracted in a 0.75 arcsec radius in the g band at this location
APFLUX_IVAR_G	float32	nanomaggy^-2	Inverse variance of APFLUX_G	Inverse variance of APFLUX_G
APFLUX_IVAR_R	float32	nanomaggy^-2	Inverse variance of APFLUX_R	Inverse variance of APFLUX_R
APFLUX_IVAR_Z	float32	nanomaggy^-2	Inverse variance of APFLUX_Z	Inverse variance of APFLUX_Z
APFLUX_R	float32	nanomaggy	Total r-band flux within a 0.75 arcsec radius	Total flux in nanomaggies extracted in a 0.75 arcsec radius in the r band at this location
APFLUX_Z	float32	nanomaggy	Total z-band flux within a 0.75 arcsec radius	Total flux in nanomaggies extracted in a 0.75 arcsec radius in the z band at this location
A_MGII	float32		Fitted parameter A (amplitude) by MgII fitter	Fitted parameter A (amplitude) by MgII fitter
BETA_MEAN	float32		Mean value of the dust emissivity index posterior from Planck	Mean value of the dust emissivity index posterior from Planck (Planck Collaboration - A&ampA 594 2016 - A10)
BETA_ML	float32		Maximum value of the dust emissivity index posterior from Planck	Maximum value of the dust emissivity index posterior from Planck (Planck Collaboration - A&A 594 2016 - A10)
BETA_RMS	float32		Root mean square value of the dust emissivity index posterior from Planck	Root mean square value of the dust emissivity index posterior from Planck (Planck Collaboration - A&A 594 – 2016 - A10)
BGS_TARGET	int64		BGS (Bright Galaxy Survey) target sel bitmask	BGS (Bright Galaxy Survey) target selection bitmask
BITWEIGHTS	int64[2]		Bitmask pair for alternative target assignment	A size of two 64 bit masks that encodes which of the alternative assignment histories that the target was assigned in
BLOBDIST	float32	pix	Max distance from a detected LS source	Maximum distance from a detected Legacy Surveys source
BRICKID	int32		Brick ID from tractor input	Brick ID from tractor input
BRICKNAME	char[8]		Brick name from tractor input	Brick name from tractor input
BRICK_OBJID	int32		Imaging Surveys OBJID on that brick	Imaging Surveys OBJID on that brick
B_MGII	float32		Fitted parameter B (constant) by MgII fitter	Fitted parameter B (constant) by MgII fitter
CALIB_G	float32		g-band systematic magnitude calibration residuals constructed by comparing LS stars to stars from Pan-STARRS1	g-band systematic magnitude calibration residuals constructed by comparing LS stars to stars from Pan-STARRS1 (details in Appendix A from DESI 2024 II paper)
CALIB_R	float32		r-band systematic magnitude calibration residuals constructed by comparing LS stars to stars from Pan-STARRS1	r-band systematic magnitude calibration residuals constructed by comparing LS stars to stars from Pan-STARRS1 (details in Appendix A from DESI 2024 II paper)
CALIB_Z	float32		z-band systematic magnitude calibration residuals constructed by comparing LS stars to stars from Pan-STARRS1	z-band systematic magnitude calibration residuals constructed by comparing LS stars to stars from Pan-STARRS1 (details in Appendix A from DESI 2024 II paper)
CAMERA	char[2]		Camera identifier [brz][0-9]	Camera identifier. Passband and SPECGRPH ([brz][0-9]).
CHECKER	char[5]		Initials of researcher who vetted the target	Initials of researcher who vetted the target
CHI2	float64		Best fit chi squared	Best fit chi squared
CMX_TARGET	int64		Target selection bitmask for commissioning	Target selection bitmask for commissioning
COADD_EXPTIME	float32	s	Summed exposure time for coadd	Summed exposure time for coadd
COADD_FIBERSTATUS	int32		bitwise-AND of input FIBERSTATUS	bitwise-AND of input FIBERSTATUS
COADD_NUMEXP	int16		Number of exposures in coadd	Number of exposures in coadd
COADD_NUMNIGHT	int16		Number of nights in coadd	Number of nights in coadd
COADD_NUMTILE	int16		Number of tiles in coadd	Number of tiles in coadd
COEFF	float64[10]		Redrock template coefficients	Redrock template coefficients
COLLISION	bool		Boolean for whether given potential assignment had a fiber collision with any keep-out zone	Boolean for whether given potential assignment had a fiber collision with any keep-out zone
COMP_TILE	float64		Assignment completeness given the target class	Assignment completeness for all targets of this type with the same value for TILES
C_CIII	float32		Confidence for CIII line	Confidence for CIII line
C_CIV	float32		Confidence for CIV line	Confidence for CIV line
C_Halpha	float32		Confidence for Halpha line	Confidence for Halpha line
C_Hbeta	float32		Confidence for Hbeta line	Confidence for Hbeta line
C_LYA	float32		Confidence that LyA line (probability for QSO)	Confidence for LyA line, i.e. ~probability to be a QSO
C_MgII	float32		Confidence for MgII line	Confidence for MgII line
DCHISQ	float32[5]		Difference in chi-squared between Tractor fits	Difference in chi-squared between Tractor model fits
DEC	float64	deg	Barycentric declination in ICRS	Barycentric declination in ICRS
DEC_IVAR	float32	deg^-2	Inverse variance of DEC, excl astrom calib err	Inverse variance of DEC, excluding astrometric calibration errors
DELTACHI2	float64		chi2 diff b/w 1st and 2nd-best Redrock fits	chi2 difference between first- and second-best redrock template fits
DELTA_CHI2	float32		chi2 diff b/w Redrock fit and MgII fitter	Difference of chi2 between redrock fit and MgII fitter over the lambda interval considered during the fit
DELTA_CHI2_MGII	float32		chi2 diff b/w Redrock fit and MgII fitter	Difference of chi2 between redrock fit and MgII fitter over the lambda interval considered during the fit
DELTA_X	float64	mm	CS5 X requested minus actual position	CS5 X requested minus actual position
DELTA_Y	float64	mm	CS5 Y requested minus actual position	CS5 Y requested minus actual position
DESINAME	char[22]		Name with truncated decimal TARGET_{RA,DEC}	Human readable identifier of a sky location DESI JXXX.XXXX[+/-]YY.YYYY, where X,Y=truncated decimal TARGET_RA, TARGET_DEC, precise to 0.36 arcsec. Multiple objects can map to a single DESINAME if very close on the sky.
DESI_TARGET	int64		DESI (dark program) target selection bitmask	DESI (dark time program) target selection bitmask
DEVICE_LOC	int32		Device location on focal plane [0-523]	Device location on focal plane [0-523]
DEVICE_TYPE	char[3]		Device type	Device type
EBV	float32	mag	Galactic extinction E(B-V) from SFD98	Galactic extinction E(B-V) reddening from SFD98
EBV_CHIANG_SFDcorr	float32		EBV dust reddening SFD correction	EBV dust reddening SFD correction (from Chiang - ApJ 958 – 2023 - 118)
EBV_MPF_Mean_FW15	float32		Mean EBV dust reddening generated from a combination of stellar reddening derived from PS1 and 2MASS photometry and Gaia EDR3 parallaxes with a FWHM of 15’	Mean EBV dust reddening generated from a combination of stellar reddening derived from PS1 and 2MASS photometry and Gaia EDR3 parallaxes with a FWHM of 15’ (more details in Mudur Park & Finkbeiner - ApJ 949 – 2023)
EBV_MPF_Mean_FW6P1	float32		Mean EBV dust reddening generated from a combination of stellar reddening derived from PS1 and 2MASS photometry and Gaia EDR3 parallaxes with a FWHM of 6.1’	Mean EBV dust reddening generated from a combination of stellar reddening derived from PS1 and 2MASS photometry and Gaia EDR3 parallaxes with a FWHM of 6.1’ (more details in Mudur Park & Finkbeiner - ApJ 949 – 2023)
EBV_MPF_Mean_ZptCorr_FW15	float32		Zero point correction in EBV dust reddening generated from a combination of stellar reddening derived from PS1 and 2MASS photometry and Gaia EDR3 parallaxes with a FWHM of 15’	Zero point correction in EBV dust reddening generated from a combination of stellar reddening derived from PS1 and 2MASS photometry and Gaia EDR3 parallaxes with a FWHM of 15’ (more details in Mudur Park & Finkbeiner - ApJ 949 – 2023)
EBV_MPF_Mean_ZptCorr_FW6P1	float32		Zero point correction in EBV dust reddening generated from a combination of stellar reddening derived from PS1 and 2MASS photometry and Gaia EDR3 parallaxes with a FWHM of 6.1’	Zero point correction in EBV dust reddening generated from a combination of stellar reddening derived from PS1 and 2MASS photometry and Gaia EDR3 parallaxes with a FWHM of 6.1’ (more details in Mudur Park & Finkbeiner - ApJ 949 – 2023)
EBV_MPF_VarCorr_FW15	float32		Uncertainty corrections in EBV dust reddening generated from a combination of stellar reddening derived from PS1 and 2MASS photometry and Gaia EDR3 parallaxes with a FWHM of 15’	Uncertainty corrections in EBV dust reddening generated from a combination of stellar reddening derived from PS1 and 2MASS photometry and Gaia EDR3 parallaxes with a FWHM of 15’ (more details in Mudur Park & Finkbeiner - ApJ 949 - 2023)
EBV_MPF_VarCorr_FW6P1	float32		Uncertainty corrections in EBV dust reddening generated from a combination of stellar reddening derived from PS1 and 2MASS photometry and Gaia EDR3 parallaxes with a FWHM of 6.1’	Uncertainty corrections in EBV dust reddening generated from a combination of stellar reddening derived from PS1 and 2MASS photometry and Gaia EDR3 parallaxes with a FWHM of 6.1’ (more details in Mudur Park & Finkbeiner - ApJ 949 - 2023)
EBV_MPF_Var_FW15	float32		Variance in EBV dust reddening generated from a combination of stellar reddening derived from PS1 and 2MASS photometry and Gaia EDR3 parallaxes with a FWHM of 15’	Variance in EBV dust reddening generated from a combination of stellar reddening derived from PS1 and 2MASS photometry and Gaia EDR3 parallaxes with a FWHM of 15’ (more details in Mudur Park & Finkbeiner - ApJ 949 - 2023)
EBV_MPF_Var_FW6P1	float32		Variance in EBV dust reddening generated from a combination of stellar reddening derived from PS1 and 2MASS photometry and Gaia EDR3 parallaxes with a FWHM of 6.1’	Variance in EBV dust reddening generated from a combination of stellar reddening derived from PS1 and 2MASS photometry and Gaia EDR3 parallaxes with a FWHM of 6.1’ (more details in Mudur Park & Finkbeiner - ApJ 949 - 2023)
EBV_SGF14	float32		EBV dust reddening from Schlafly Green & Finkbeiner map from PanSTARRS1	EBV dust reddening from Schlafly Green & Finkbeiner map from PanSTARRS1 (details in Appendix A from DESI 2024 II paper)
EFFECTIVE_BIAS	float64		Effective bias used to weight the galaxy	Effective bias used to weight the galaxy
EFFTIME_ETC	float64	s	Effective exp time (nominal conditions; ETC)	Effective exposure time for nominal conditions inferred from ETC data
EFFTIME_SPEC	float64	s	Effective exp time (nominal conditions; TSNR2)	Effective exposure time for nominal conditions derived from the TSNR2 fits to the spectroscopy
EQ_ALL_0P0	float64		e-correction at redshift=0.0	e-correction at redshift=0.0
EQ_ALL_0P1	float64		e-correction at redshift=0.1	e-correction at redshift=0.1
EXPID	int32		DESI Exposure ID number	DESI Exposure ID number
EXPTIME	float64	s	Length of time shutter was open	Length of time shutter was open
FAFLAVOR	char[*]		Fiberassign flavor name	Fiberassign flavor name
FAPRGRM	char[*]		Fiberassign program name	Fiberassign program name
FA_TARGET	int64		Internal targeting bit for fiberassign	Targeting bit internally used by fiberassign (linked with FA_TYPE)
FA_TYPE	binary		Internal target type for fiberassign	Fiberassign internal target type (science, standard, sky, safe, suppsky)
FIBER	int32		Fiber ID on the CCDs [0-4999]	Fiber ID on the CCDs [0-4999]
FIBERASSIGN_X	float32	mm	Fiberassign expected CS5 X loc on focal plane	Fiberassign expected CS5 X location on focal plane
FIBERASSIGN_Y	float32	mm	Fiberassign expected CS5 Y loc on focal plane	Fiberassign expected CS5 Y location on focal plane
FIBERFLUX_G	float32	nanomaggy	Predicted object g flux within diam 1.5 arcsec	Predicted g-band flux within a fiber of diameter 1.5 arcsec from this object in 1 arcsec Gaussian seeing
FIBERFLUX_IVAR_G	float32	nanomaggy^-2	Inverse variance of FIBERFLUX_G	Inverse variance of FIBERFLUX_G
FIBERFLUX_IVAR_R	float32	nanomaggy^-2	Inverse variance of FIBERFLUX_R	Inverse variance of FIBERFLUX_R
FIBERFLUX_IVAR_Z	float32	nanomaggy^-2	Inverse variance of FIBERFLUX_Z	Inverse variance of FIBERFLUX_Z
FIBERFLUX_R	float32	nanomaggy	Predicted object r flux within diam 1.5 arcsec	Predicted r-band flux within a fiber of diameter 1.5 arcsec from this object in 1 arcsec Gaussian seeing
FIBERFLUX_Z	float32	nanomaggy	Predicted object z flux within diam 1.5 arcsec	Predicted z-band flux within a fiber of diameter 1.5 arcsec from this object in 1 arcsec Gaussian seeing
FIBERSTATUS	int32		Fiber status mask. 0=good	Fiber status mask. 0=good
FIBERTOTFLUX_G	float32	nanomaggy	Predicted total g flux within diam 1.5 arcsec	Predicted g-band flux within a fiber of diameter 1.5 arcsec from all sources at this location in 1 arcsec Gaussian seeing
FIBERTOTFLUX_R	float32	nanomaggy	Predicted total r flux within diam 1.5 arcsec	Predicted r-band flux within a fiber of diameter 1.5 arcsec from all sources at this location in 1 arcsec Gaussian seeing
FIBERTOTFLUX_W1	float32	nanomaggy	Predicted total W1 flux within diam 1.5 arcsec	Predicted WISE W1-band flux within a fiber of diameter 1.5 arcsec from all sources at this location in 1 arcsec Gaussian seeing
FIBERTOTFLUX_W2	float32	nanomaggy	Predicted total W2 flux within diam 1.5 arcsec	Predicted WISE W2-band flux within a fiber of diameter 1.5 arcsec from all sources at this location in 1 arcsec Gaussian seeing
FIBERTOTFLUX_Z	float32	nanomaggy	Predicted total z flux within diam 1.5 arcsec	Predicted z-band flux within a fiber of diameter 1.5 arcsec from all sources at this location in 1 arcsec Gaussian seeing
FIBER_DEC	float64	deg	DEC of actual fiber position	DEC of actual fiber position
FIBER_RA	float64	deg	RA of actual fiber position	RA of actual fiber position
FIBER_X	float64	mm	CS5 X location requested by PlateMaker	CS5 X location requested by PlateMaker
FIBER_Y	float64	mm	CS5 Y location requested by PlateMaker	CS5 Y location requested by PlateMaker
FIRSTNIGHT	int32		Calendar Date of the first exposure	KPNO Calendar Date when the first exposure was obtained (regardless of data quality)
FLUX_G	float32	nanomaggy	Flux in the Legacy Survey g-band (AB)	Flux in the Legacy Survey g-band (AB)
FLUX_G_DERED	float32	nanomaggy	FLUX_G corrected for Galactic extinction (AB)	Flux in the g-band after correcting for Galactic extinction (AB system)
FLUX_IVAR_G	float32	nanomaggy^-2	Inverse variance of FLUX_G (AB)	Inverse variance of FLUX_G (AB)
FLUX_IVAR_R	float32	nanomaggy^-2	Inverse variance of FLUX_R (AB)	Inverse variance of FLUX_R (AB)
FLUX_IVAR_W1	float32	nanomaggy^-2	Inverse variance of FLUX_W1 (AB)	Inverse variance of FLUX_W1 (AB)
FLUX_IVAR_W2	float32	nanomaggy^-2	Inverse variance of FLUX_W2 (AB)	Inverse variance of FLUX_W2 (AB)
FLUX_IVAR_Z	float32	nanomaggy^-2	Inverse variance of FLUX_Z (AB)	Inverse variance of FLUX_Z (AB)
FLUX_R	float32	nanomaggy	Flux in the Legacy Survey r-band (AB)	Flux in the Legacy Survey r-band (AB)
FLUX_R_DERED	float32	nanomaggy	FLUX_R corrected for Galactic extinction (AB)	Flux in the r-band after correcting for Galactic extinction (AB system)
FLUX_W1	float32	nanomaggy	WISE flux in W1 (AB)	WISE flux in W1 (AB)
FLUX_W1_DERED	float32	nanomaggy	FLUX_W1 corrected for Galactic extinction (AB)	Flux in the WISE W1-band after correcting for Galactic extinction (AB system)
FLUX_W2	float32	nanomaggy	WISE flux in W2 (AB)	WISE flux in W2 (AB)
FLUX_W2_DERED	float32	nanomaggy	FLUX_W2 corrected for Galactic extinction (AB)	Flux in the WISE W2-band after correcting for Galactic extinction (AB system)
FLUX_Z	float32	nanomaggy	Flux in the Legacy Survey z-band (AB)	Flux in the Legacy Survey z-band (AB)
FLUX_Z_DERED	float32	nanomaggy	FLUX_Z corrected for Galactic extinction (AB)	Flux in the z-band after correcting for Galactic extinction (AB system)
FRACZ_TILELOCID	float64		Frac of targets obs at TILELOCID given class	The fraction of targets of this type at this TILELOCID that received an observation (after forcing each target to a unique TILELOCID)
FRAC_TLOBS_TILES	float64		Fraction of targets with the same TILES value that contribute to FRACZ_TILELOCID	Fraction of targets with the same TILES value that contribute to FRACZ_TILELOCID
GAIA_ASTROMETRIC_EXCESS_NOISE	float32		Gaia astrometric excess noise	Gaia astrometric excess noise
GAIA_ASTROMETRIC_PARAMS_SOLVED	int64		Astrometric params estimated for a Gaia source	which astrometric parameters were estimated for a Gaia source
GAIA_ASTROMETRIC_SIGMA5D_MAX	float32	mas	Gaia semi-major axis of 5-d error ellipsoid	Gaia longest semi-major axis of the 5-d error ellipsoid
GAIA_DEC	float64	deg	Gaia ICRS declination	Gaia ICRS declination
GAIA_DUPLICATED_SOURCE	bool		Gaia duplicated source flag	Gaia duplicated source flag
GAIA_PHOT_BP_MEAN_FLUX_OVER_ERROR	float32		Gaia BP band signal-to-noise	Gaia BP band signal-to-noise
GAIA_PHOT_BP_MEAN_MAG	float32	mag	Gaia BP band magnitude	Gaia BP band magnitude
GAIA_PHOT_BP_N_OBS	int32		Gaia BP band number of observations	Gaia BP band number of observations
GAIA_PHOT_BP_RP_EXCESS_FACTOR	float32		Gaia BP/RP excess factor	Gaia BP/RP excess factor
GAIA_PHOT_G_MEAN_FLUX_OVER_ERROR	float32		Gaia G band signal-to-noise	Gaia G band signal-to-noise
GAIA_PHOT_G_MEAN_MAG	float32	mag	Gaia G band magnitude	Gaia G band magnitude
GAIA_PHOT_G_N_OBS	int32		Gaia G band number of observations	Gaia G band number of observations
GAIA_PHOT_RP_MEAN_FLUX_OVER_ERROR	float32		Gaia RP band signal-to-noise	Gaia RP band signal-to-noise
GAIA_PHOT_RP_MEAN_MAG	float32	mag	Gaia RP band magnitude	Gaia RP band magnitude
GAIA_PHOT_RP_N_OBS	int32		Gaia RP band number of observations	Gaia RP band number of observations
GAIA_RA	float64	deg	Gaia ICRS right ascension	Gaia ICRS right ascension
GALDEPTH_G	float32	nanomaggy^-2	Galaxy model-based depth in LS g-band	Galaxy model-based depth in LS g-band
GALDEPTH_R	float32	nanomaggy^-2	Galaxy model-based depth in LS r-band	Galaxy model-based depth in LS r-band
GALDEPTH_Z	float32	nanomaggy^-2	Galaxy model-based depth in LS z-band	Galaxy model-based depth in LS z-band
GOODHARDLOC	bool		True/False whether the fiber had good hardware	True/False whether the fiber had good hardware
GOODPRI	bool		True if assigned priority <= base priority	True/False whether the priority of what was assigned to the location was <= the base priority of the given target class
GOODTSNR	bool		True if TSNR_<class> above minimum threshold	True/False whether the TSNR_<class> value used was above the minimum threshold for the given target class
HALPHA	float32		Intensity of Halpha emission at FWHM of 6 minutes	Intensity of Halpha emission at FWHM of 6 minutes (from Finkbeiner - ApJS 146 2003 - 407)
HALPHA_CHI2	float32		Reduced chi2 of the fit for the HALPHA line	Reduced chi2 of the fit for the HALPHA line
HALPHA_CONT	float32	10**-17 erg/(s cm2 Angstrom)	Continuum for HALPHA line fitting (constant)	Continuum used for the fitting (fixed value) for the HALPHA line
HALPHA_CONT_IVAR	float32	10**+34 (s2 cm4 Angstrom2) / erg2	Inverse variance of HALPHA line continuum	Inverse variance of the continuum for the HALPHA line
HALPHA_ERROR	float32		Intensity error of Halpha emission at FWHM of 6’	Intensity error of Halpha emission at FWHM of 6’ (from Finkbeiner - ApJS 146 – 2003 - 407)
HALPHA_EW	float32	Angstrom	Fitted HALPHA line rest-frame equivalent width	Fitted rest-frame equivalent width for the HALPHA line
HALPHA_EW_IVAR	float32	Angstrom^-2	Inverse variance of fitted HALPHA_EW	Inverse variance of the fitted rest-frame equivalent width for the HALPHA line
HALPHA_FLUX	float32	10**-17 erg/(s cm2)	Fitted flux for the HALPHA line	Fitted flux for the HALPHA line
HALPHA_FLUX_IVAR	float32	10**+34 (s2 cm4) / erg2	Inverse variance of fitted HALPHA line flux	Inverse variance of the fitted flux for the HALPHA line
HALPHA_NDOF	int32		Number of deg of freedom for HALPHA line fit	Number of degrees of freedom of the fit for the HALPHA line
HALPHA_SHARE	float32		NaN (SHARE not relevant for HALPHA line)	NaN (SHARE not relevant for HALPHA line)
HALPHA_SHARE_IVAR	float32		NaN (SHARE not relevant for HALPHA line)	NaN (SHARE not relevant for HALPHA line)
HALPHA_SIGMA	float32	Angstrom	Fitted HALPHA line width in the observed frame	Fitted line width (in the observed frame) for the HALPHA line
HALPHA_SIGMA_IVAR	float32	Angstrom^-2	Inverse variance of HALPHA_SIGMA (obs frame)	Inverse variance of the fitted line width (in the observed frame) for the HALPHA line
HBETA_CHI2	float32		Reduced chi2 of the fit for the HBETA line	Reduced chi2 of the fit for the HBETA line
HBETA_CONT	float32	10**-17 erg/(s cm2 Angstrom)	Continuum for HBETA line fitting (constant)	Continuum used for the fitting (fixed value) for the HBETA line
HBETA_CONT_IVAR	float32	10**+34 (s2 cm4 Angstrom2) / erg2	Inverse variance of HBETA line continuum	Inverse variance of the continuum for the HBETA line
HBETA_EW	float32	Angstrom	Fitted HBETA line rest-frame equivalent width	Fitted rest-frame equivalent width for the HBETA line
HBETA_EW_IVAR	float32	Angstrom^-2	Inverse variance of HBETA_EW (rest frame)	Inverse variance of the fitted rest-frame equivalent width for the HBETA line
HBETA_FLUX	float32	10**-17 erg/(s cm2)	Fitted flux for the HBETA line	Fitted flux for the HBETA line
HBETA_FLUX_IVAR	float32	10**+34 (s2 cm4) / erg2	Inverse variance of fitted HBETA line flux	Inverse variance of the fitted flux for the HBETA line
HBETA_NDOF	int32		Number of deg of freedom for HBETA line fit	Number of degrees of freedom of the fit for the HBETA line
HBETA_SHARE	float32		NaN (SHARE not relevant for HBETA line)	NaN (SHARE not relevant for HBETA line)
HBETA_SHARE_IVAR	float32		NaN (SHARE not relevant for HBETA line)	NaN (SHARE not relevant for HBETA line)
HBETA_SIGMA	float32	Angstrom	Fitted HBETA line width in the observed frame	Fitted line width (in the observed frame) for the HBETA line
HBETA_SIGMA_IVAR	float32	Angstrom^-2	Inverse variance of HBETA_SIGMA (obs frame)	Inverse variance of the fitted line width (in the observed frame) for the HBETA line
HDELTA_CHI2	float32		Reduced chi2 of the fit for the HDELTA line	Reduced chi2 of the fit for the HDELTA line
HDELTA_CONT	float32	10**-17 erg/(s cm2 Angstrom)	Continuum for HDELTA line fitting (constant)	Continuum used for the fitting (fixed value) for the HDELTA line
HDELTA_CONT_IVAR	float32	10**+34 (s2 cm4 Angstrom2) / erg2	Inverse variance of the HDELTA line continuum	Inverse variance of the continuum for the HDELTA line
HDELTA_EW	float32	Angstrom	Fitted HDELTA line rest-frame equivalent width	Fitted rest-frame equivalent width for the HDELTA line
HDELTA_EW_IVAR	float32	Angstrom^-2	Inverse variance of HDELTA_EW (rest frame)	Inverse variance of the fitted rest-frame equivalent width for the HDELTA line
HDELTA_FLUX	float32	10**-17 erg/(s cm2)	Fitted flux for the HDELTA line	Fitted flux for the HDELTA line
HDELTA_FLUX_IVAR	float32	10**+34 (s2 cm4) / erg2	Inverse variance of fitted HDELTA line flux	Inverse variance of the fitted flux for the HDELTA line
HDELTA_NDOF	int32		Number of deg of freedom of HDELTA line fit	Number of degrees of freedom of the fit for the HDELTA line
HDELTA_SHARE	float32		NaN (SHARE not relevant for HDELTA line)	NaN (SHARE not relevant for HDELTA line)
HDELTA_SHARE_IVAR	float32		NaN (SHARE not relevant for HDELTA line)	NaN (SHARE not relevant for HDELTA line)
HDELTA_SIGMA	float32	Angstrom	Fitted HDELTA line width in the observed frame	Fitted line width (in the observed frame) for the HDELTA line
HDELTA_SIGMA_IVAR	float32	Angstrom^-2	Inverse variance of HDELTA_SIGMA (obs frame)	Inverse variance of the fitted line width (in the observed frame) for the HDELTA line
HEALPIX	int32		HEALPixel at this location (NSIDE=64; NESTED)	HEALPixel containing this location at NSIDE=64 in the NESTED scheme
HGAMMA_CHI2	float32		Reduced chi2 of the fit for the HGAMMA line	Reduced chi2 of the fit for the HGAMMA line
HGAMMA_CONT	float32	10**-17 erg/(s cm2 Angstrom)	Continuum for HGAMMA line fitting (constant)	Continuum used for the fitting (fixed value) for the HGAMMA line
HGAMMA_CONT_IVAR	float32	10**+34 (s2 cm4 Angstrom2) / erg2	Inverse variance of the HGAMMA line continuum	Inverse variance of the continuum for the HGAMMA line
HGAMMA_EW	float32	Angstrom	Fitted HGAMMA line rest-frame equivalent width	Fitted rest-frame equivalent width for the HGAMMA line
HGAMMA_EW_IVAR	float32	Angstrom^-2	Inverse variance of HGAMMA_EW (rest frame)	Inverse variance of the fitted rest-frame equivalent width for the HGAMMA line
HGAMMA_FLUX	float32	10**-17 erg/(s cm2)	Fitted flux for the HGAMMA line	Fitted flux for the HGAMMA line
HGAMMA_FLUX_IVAR	float32	10**+34 (s2 cm4) / erg2	Inverse variance of fitted HGAMMA line flux	Inverse variance of the fitted flux for the HGAMMA line
HGAMMA_NDOF	int32		Number of deg of freedom of HGAMMA line fit	Number of degrees of freedom of the fit for the HGAMMA line
HGAMMA_SHARE	float32		NaN (SHARE not relevant for HGAMMA line)	NaN (SHARE not relevant for HGAMMA line)
HGAMMA_SHARE_IVAR	float32		NaN (SHARE not relevant for HGAMMA line)	NaN (SHARE not relevant for HGAMMA line)
HGAMMA_SIGMA	float32	Angstrom	Fitted HGAMMA line width in the observed frame	Fitted line width (in the observed frame) for the HGAMMA line
HGAMMA_SIGMA_IVAR	float32	Angstrom^-2	Inverse variance of HGAMMA_SIGMA (obs frame)	Inverse variance of the fitted line width (in the observed frame) for the HGAMMA line
HI	float32		HI column density assembled by combining the Effelsberg-Bonn HI Survey and the third revision of the Galactic All-Sky Survey	HI column density assembled by combining the Effelsberg-Bonn HI Survey and the third revision of the Galactic All-Sky Survey (from HI4PI Collaboration - A&A 594 – 2016 - A116)
HPXPIXEL	int64		HEALPixel at this location (NSIDE=64; NESTED)	HEALPixel containing this location at NSIDE=64 in the NESTED scheme
IN_COADD_B	bool		Fiber/exp used in coadd of camera B	If True this fiber in this exposure was used in the coadd of camera B
IN_COADD_R	bool		Fiber/exp used in coadd of camera R	If True this fiber in this exposure was used in the coadd of camera R
IN_COADD_Z	bool		Fiber/exp used in coadd of camera Z	If True this fiber in this exposure was used in the coadd of camera Z
IN_DESI	int16		Used by fiberassign to create tile; set to 1	Used by fiberassign to make a tile in the DESI footprint; always set to 1
IN_RADIUS	float32	arcsec	Radius used to set the IN_BRIGHT_OBJECT bit	Radius used to set the IN_BRIGHT_OBJECT bit in the DESI_TARGET bitmask.
IS_QSO_MGII	bool		True if the object passes the MgII selection	Boolean: True if the object passes the MgII selection
IS_QSO_QN	int16		True if the object passes QuasarNET selection	Spectroscopic classification from QuasarNET (1 for a quasar)
KAPPA_PLANCK	float64		Map of lensing convergence from Planck where values are the mean-field-subtracted minimum-variance estimate from temperature and polarization	Map of lensing convergence from Planck where values are the mean-field-subtracted minimum-variance estimate from temperature and polarization (from Planck Collaboration -A&A 641 – 2020 - A8)
KCORR_G0P0	float64		g-band k-correction at redshift=0.0	g-band k-correction at redshift=0.0
KCORR_G0P1	float64		g-band k-correction at redshift=0.1	g-band k-correction at redshift=0.1
KCORR_R0P0	float64		r-band k-correction at redshift=0.0	r-band k-correction at redshift=0.0
KCORR_R0P1	float64		r-band k-correction at redshift=0.1	r-band k-correction at redshift=0.1
LAMBDA_REF	float32	Angstrom	Requested central wavelength for fiber	Requested wavelength at which targets should be centered on fibers
LASTNIGHT	int32		Final night of observation in series of coadds	Final night of observation included in a series of coadds
LC_FLUX_IVAR_W1	float32[15]	nanomaggy^-2	Inverse variance of LC_FLUX_W1 (AB; 0 if N/A)	Inverse variance of LC_FLUX_W1 (AB system; defaults to zero for unused entries)
LC_FLUX_IVAR_W2	float32[15]	nanomaggy^-2	Inverse variance of LC_FLUX_W2 (AB; 0 if N/A)	Inverse variance of LC_FLUX_W2 (AB system; defaults to zero for unused entries)
LC_FLUX_W1	float32[15]	nanomaggy	AB FLUX_W1 in up to 15 coadd epochs (0 if N/A)	FLUX_W1 in each of up to fifteen unWISE coadd epochs (AB system; defaults to zero for unused entries)
LC_FLUX_W2	float32[15]	nanomaggy	AB FLUX_W2 in up to 15 coadd epochs (0 if N/A)	FLUX_W2 in each of up to fifteen unWISE coadd epochs (AB system; defaults to zero for unused entries)
LC_MJD_W1	float64[15]		MJD_W1 in up to 15 coadd epochs (0 if N/A)	MJD_W1 in each of up to fifteen unWISE coadd epochs (defaults to zero for unused entries)
LC_MJD_W2	float64[15]		MJD_W2 in up to 15 coadd epochs (0 if N/A)	MJD_W2 in each of up to fifteen unWISE coadd epochs (defaults to zero for unused entries)
LC_NOBS_W1	int16[15]		NOBS_W1 in up to 15 unWISE coadd epochs	NOBS_W1 in each of up to fifteen unWISE coadd epochs
LC_NOBS_W2	int16[15]		NOBS_W2 in up to 15 unWISE coadd epochs	NOBS_W2 in each of up to fifteen unWISE coadd epochs
LOCATION	int64		Loc on focal plane PETAL_LOC*1000 + DEVICE_LOC	Location on the focal plane PETAL_LOC*1000 + DEVICE_LOC
LOCATION_ASSIGNED	bool		True if assigned for the target in question	True/False for assigned/unassigned for the target in question
LRG_MASK	binary		Imaging mask bits relevant to LRG targets	Imaging mask bits relevant to LRG targets
MAIN_NSPEC	int32		Nb of coadded spectra in Main survey for TID	Number of coadded spectra for this TARGETID in Main survey
MAIN_PRIMARY	bool		True if primary coadd spectrum in Main survey	Boolean flag (True/False) for the primary coadded spectrum in Main survey
MASKBITS	int16		Bitwise mask from imaging for potential issues	Bitwise mask from the imaging indicating potential issue or blending
MAX_MJD	float64	d	MJD of the last exposure in coadded spectrum	Maximum value of the Modified Julian Date (when the shutter was open for the last exposure used in the coadded spectrum)
MEAN_DELTA_X	float32	mm	Mean fiber diff (requested - actual CS5 X loc)	Mean (over exposures) fiber difference requested - actual CS5 X location on focal plane
MEAN_DELTA_Y	float32	mm	Mean fiber diff (requested - actual CS5 Y loc)	Mean (over exposures) fiber difference requested - actual CS5 Y location on focal plane
MEAN_FIBER_DEC	float64	deg	Mean (over exposures) DEC of fiber position	Mean (over exposures) DEC of actual fiber position
MEAN_FIBER_RA	float64	deg	Mean (over exposures) RA of fiber position	Mean (over exposures) RA of actual fiber position
MEAN_FIBER_X	float32	mm	Mean (over exposures) fiber CS5 X loc on FP	Mean (over exposures) fiber CS5 X location on focal plane
MEAN_FIBER_Y	float32	mm	Mean (over exposures) fiber CS5 Y loc on FP	Mean (over exposures) fiber CS5 Y location on focal plane
MEAN_MJD	float64	d	Mean of MJD of exposures in a coadded spectrum	Mean value of the Modified Julian Date (when the shutter was open for exposures used in the coadded spectrum)
MEAN_PSF_TO_FIBER_SPECFLUX	float32		Mean PSF light fraction within 1.5arcsec fiber	Mean of input exposures fraction of light from point-like source captured by 1.5 arcsec diameter fiber given atmospheric seeing
MEDIAN_CALIB_COUNT_B	float64		Median of calibrated flux in B camera	Median of calibrated flux in B camera
MEDIAN_CALIB_COUNT_R	float64		Median of calibrated flux in R camera	Median of calibrated flux in R camera
MEDIAN_CALIB_COUNT_Z	float64		Median of calibrated flux in Z camera	Median of calibrated flux in Z camera
MEDIAN_CALIB_SNR_B	float64		Median(S/N) of calibrated flux in B camera	Median(S/N) of calibrated flux in B camera
MEDIAN_CALIB_SNR_R	float64		Median(S/N) of calibrated flux in R camera	Median(S/N) of calibrated flux in R camera
MEDIAN_CALIB_SNR_Z	float64		Median(S/N) of calibrated flux in Z camera	Median(S/N) of calibrated flux in Z camera
MEDIAN_FFLAT_COUNT_B	float64		Median of fiber-flatfielded counts in B camera	Median of fiber-flatfielded counts in B camera
MEDIAN_FFLAT_COUNT_R	float64		Median of fiber-flatfielded counts in R camera	Median of fiber-flatfielded counts in R camera
MEDIAN_FFLAT_COUNT_Z	float64		Median of fiber-flatfielded counts in Z camera	Median of fiber-flatfielded counts in Z camera
MEDIAN_FFLAT_SNR_B	float64		Median(S/N) of B cam fiberflatfielded counts	Median(S/N) of fiberflatfielded counts in B camera
MEDIAN_FFLAT_SNR_R	float64		Median(S/N) of R cam fiberflatfielded counts	Median(S/N) of fiberflatfielded counts in R camera
MEDIAN_FFLAT_SNR_Z	float64		Median(S/N) of Z cam fiberflatfielded counts	Median(S/N) of fiberflatfielded counts in Z camera
MEDIAN_RAW_COUNT_B	float64		Median of raw counts in B camera	Median of raw counts in B camera
MEDIAN_RAW_COUNT_R	float64		Median of raw counts in R camera	Median of raw counts in R camera
MEDIAN_RAW_COUNT_Z	float64		Median of raw counts in Z camera	Median of raw counts in Z camera
MEDIAN_RAW_SNR_B	float64		Median(raw signal/noise) in B camera	Median(raw signal/noise) in B camera
MEDIAN_RAW_SNR_R	float64		Median(raw signal/noise) in R camera	Median(raw signal/noise) in R camera
MEDIAN_RAW_SNR_Z	float64		Median(raw signal/noise) in Z camera	Median(raw signal/noise) in Z camera
MEDIAN_SKYSUB_COUNT_B	float64		Median of sky-subtracted counts in B camera	Median of sky-subtracted counts in B camera
MEDIAN_SKYSUB_COUNT_R	float64		Median of sky-subtracted counts in R camera	Median of sky-subtracted counts in R camera
MEDIAN_SKYSUB_COUNT_Z	float64		Median of sky-subtracted counts in Z camera	Median of sky-subtracted counts in Z camera
MEDIAN_SKYSUB_SNR_B	float64		Median(S/N) of sky-subtracted counts in B cam	Median(S/N) of sky-subtracted counts in B camera
MEDIAN_SKYSUB_SNR_R	float64		Median(S/N) of sky-subtracted counts in R cam	Median(S/N) of sky-subtracted counts in R camera
MEDIAN_SKYSUB_SNR_Z	float64		Median(S/N) of sky-subtracted counts in Z cam	Median(S/N) of sky-subtracted counts in Z camera
MIN_MJD	float64	d	MJD of the first exposure in coadded spectrum	Minimum value of the Modified Julian Date (when the shutter was open for the first exposure used in the coadded spectrum)
MJD	float64	d	Modified Julian Date when shutter open for exp	Modified Julian Date when shutter was opened for this exposure
MJD_BEGIN	float64	d	Start of the allowed observing window (MJD)	Start of the allowed observing window for this target (Modified Julian Date)
MJD_END	float64	d	End of the allowed observing window (MJD)	End of the allowed observing window for this target (Modified Julian Date)
MORPHTYPE	char[4]		Imaging Survey morphological type from Tractor	Imaging Surveys morphological type from Tractor
MWS_TARGET	int64		Milky Way Survey targeting bits	Milky Way Survey targeting bits
MW_TRANSMISSION_G	float32		Milky Way dust transmission in LS g-band	Milky Way dust transmission in LS g-band
MW_TRANSMISSION_R	float32		Milky Way dust transmission in LS r-band	Milky Way dust transmission in LS r-band
MW_TRANSMISSION_W1	float32		Milky Way dust transmission in WISE W1	Milky Way dust transmission in WISE W1
MW_TRANSMISSION_W2	float32		Milky Way dust transmission in WISE W2	Milky Way dust transmission in WISE W2
MW_TRANSMISSION_W3	float32		Milky Way dust transmission in WISE W3	Milky Way dust transmission in WISE W3
MW_TRANSMISSION_W4	float32		Milky Way dust transmission in WISE W4	Milky Way dust transmission in WISE W4
MW_TRANSMISSION_Z	float32		Milky Way dust transmission in LS z-band	Milky Way dust transmission in LS z-band
NCOEFF	int64		Number of Redrock template coefficients	Number of Redrock template coefficients
NEAR_RADIUS	float32	arcsec	Radius used to set the NEAR_BRIGHT_OBJECT bit	Radius used to set the NEAR_BRIGHT_OBJECT bit in the DESI_TARGET bitmask.
NIGHT	int32		YYYYMMDD date at start of this observing night	Night of observation (YYYYMMDD) starting at local noon before observations start
NOBS_G	int16		Number of images for central pixel in g-band	Number of images for central pixel in g-band
NOBS_R	int16		Number of images for central pixel in r-band	Number of images for central pixel in r-band
NOBS_Z	int16		Number of images for central pixel in z-band	Number of images for central pixel in z-band
NPIXELS	int64		Number of unmasked pixels used in Redrock fit	Number of unmasked pixels contributing to the Redrock fit
NTILE	int64		Number of tiles target was available on	Number of tiles target was available on
NUMOBS	int64		Nb of spectro observations of this given tile	Number of spectroscopic observations (on this specific, single tile)
NUMOBS_INIT	int64		Initial number of observations for target	Initial number of observations for target calculated across target selection bitmasks and OBSCONDITIONS
NUMOBS_MORE	int64		Number of additional observations needed	Number of additional observations needed
NUMTARGET	int16		Total number of targets covered by positioner	Total number of targets that this positioner covered
NUM_ITER	int64		Number of positioner iterations	Number of positioner iterations
NX	float64		Estimated mean number density given the redshift and number of overlapping tiles (NTILE)	Estimated mean number density given the redshift and number of overlapping tiles (NTILE)
NZ	float64	h^3 Mpc^-3	Comoving number density of tracer at given z	The comoving number density of the tracer at the given redshift, assuming complete sample
O2C	float64		Criterion for strength of OII emission for ELG	The criteria for assessing strength of OII emission for ELG observations
OBJID	int32		Imaging Surveys OBJID on brick (BRICK_OBJID)	Imaging Surveys OBJID on that brick (renamed BRICK_OBJID)
OBJTYPE	char[3]		Object type: TGT, SKY, NON, BAD	Object type: TGT, SKY, NON, BAD
OBSCONDITIONS	int32		Bitmask of allowed observing conditions	Bitmask of allowed observing conditions
OCLAYER	char[6]		DARK for dark time or BRIGHT for any time	Either ‘DARK’ for dark-time or ‘BRIGHT’ to observe in either bright- or dark-time
OIII_CHI2	float32		Reduced chi2 of the fit for the [OIII] doublet	Reduced chi2 of the fit for the [OIII] doublet
OIII_CONT	float32	10**-17 erg/(s cm2 Angstrom)	Continuum for [OIII] doublet fit (constant)	Continuum used for the fitting (fixed value) for the [OIII] doublet
OIII_CONT_IVAR	float32	10**+34 (s2 cm4 Angstrom2) / erg2	Inverse variance of [OIII] doublet continuum	Inverse variance of the continuum for the [OIII] doublet
OIII_EW	float32	Angstrom	[OIII] doublet rest-frame equivalent width	Fitted rest-frame equivalent width for the [OIII] doublet
OIII_EW_IVAR	float32	Angstrom^-2	Inverse variance of fitted OIII_EW	Inverse variance of the fitted rest-frame equivalent width for the [OIII] doublet
OIII_FLUX	float32	10**-17 erg/(s cm2)	Fitted flux for the [OIII] doublet	Fitted flux for the [OIII] doublet
OIII_FLUX_IVAR	float32	10**+34 (s2 cm4) / erg2	Inverse variance of fitted [OIII] doublet flux	Inverse variance of the fitted flux for the [OIII] doublet
OIII_NDOF	int32		Nb of degrees of freedom of [OIII] doublet fit	Number of degrees of freedom of the fit for the [OIII] doublet
OIII_SHARE	float32		F1/(F0+F1) for [OIII] w/ F0, F1 each line flux	F1/(F0+F1) for the [OIII] doublet, where F0 and F1 are the individual line fluxes (SHARE value fixed during the fit)
OIII_SHARE_IVAR	float32		Infinity because SHARE is fixed during the fit	Infinite value, as SHARE is fixed during the fit
OIII_SIGMA	float32	Angstrom	Fitted [OIII] line width in the observed frame	Fitted line width (in the observed frame) for the [OIII] doublet
OIII_SIGMA_IVAR	float32	Angstrom^-2	Inverse variance of OIII_SIGMA (obs frame)	Inverse variance of the fitted line width (in the observed frame) for the [OIII] doublet
OII_CHI2	float32		Reduced chi2 of the fit for the [OII] doublet	Reduced chi2 of the fit for the [OII] doublet
OII_CONT	float32	10**-17 erg/(s cm2 Angstrom)	Continuum for [OII] doublet fit (constant)	Continuum used for the fitting (fixed value) for the [OII] doublet
OII_CONT_IVAR	float32	10**+34 (s2 cm4 Angstrom2) / erg2	Inverse variance of [OII] doublet continuum	Inverse variance of the continuum for the [OII] doublet
OII_EW	float32	Angstrom	[OII] doublet rest-frame equivalent width	Fitted rest-frame equivalent width for the [OII] doublet
OII_EW_IVAR	float32	Angstrom^-2	Inverse variance of fitted OII_EW	Inverse variance of the fitted rest-frame equivalent width for the [OII] doublet
OII_FLUX	float32	10**-17 erg/(s cm2)	Fitted flux for the [OII] doublet	Fitted flux for the [OII] doublet
OII_FLUX_IVAR	float32	10**+34 (s2 cm4) / erg2	Inverse variance of fitted [OII] doublet flux	Inverse variance of the fitted flux for the [OII] doublet
OII_NDOF	int32		Nb of degrees of freedom of [OII] doublet fit	Number of degrees of freedom of the fit for the [OII] doublet
OII_SHARE	float32		F1/(F0+F1) for [OII] w/ F0, F1 each line flux	Fitted F1/(F0+F1) for the [OII] doublet, where F0 and F1 are the individual line fluxes
OII_SHARE_IVAR	float32		Inverse variance of OII_SHARE value	Inverse variance of the fitted F1/(F0+F1) for the [OII] doublet
OII_SIGMA	float32	Angstrom	Fitted [OII] line width in the observed frame	Fitted line width (in the observed frame) for the [OII] doublet
OII_SIGMA_IVAR	float32	Angstrom^-2	Inverse variance of OII_SIGMA (obs frame)	Inverse variance of the fitted line width (in the observed frame) for the [OII] doublet
PARALLAX	float32	mas	Reference catalog parallax	Reference catalog parallax
PARALLAX_IVAR	float32	mas^-2	Inverse variance of PARALLAX	Inverse variance of PARALLAX
PETAL_LOC	int16		Petal location [0-9]	Petal location [0-9]
PHOTSYS	char[1]		Photom system: N for MzLS/BASS; S for DECaLS	‘N’ for the MzLS/BASS photometric system, ‘S’ for DECaLS
PLATE_DEC	float64	deg	Barycentric Declination for PlateMaker (ICRS)	Barycentric Declination in ICRS to be used by PlateMaker
PLATE_RA	float64	deg	Barycentric RA for PlateMaker (ICRS)	Barycentric Right Ascension in ICRS to be used by PlateMaker
PLATE_REF_EPOCH	float64	yr	Copy of REF_EPOCH for PlateMaker	Copy of REF_EPOCH to be used by PlateMaker
PMDEC	float32	mas yr^-1	Proper motion in the +Dec direction	Proper motion in the +Dec direction
PMDEC_IVAR	float32	yr^2 mas^-2	Inverse variance of PMDEC	Inverse variance of PMDEC
PMRA	float32	mas yr^-1	Proper motion in +RA direction, incl. cos(dec)	proper motion in the +RA direction (already including cos(dec))
PMRA_IVAR	float32	yr^2 mas^-2	Inverse variance of PMRA	Inverse variance of PMRA
PRIORITY	int32		Target current priority	Target current priority
PRIORITY_ASSIGNED	int32		(only for data) PRIORITY of the target that was assigned to the given FIBER and TILEID (redundant with PRIORITY in the random catalogs)	(only for data) PRIORITY of the target that was assigned to the given FIBER and TILEID (redundant with PRIORITY in the random catalogs)
PRIORITY_INIT	int64		Target initial priority from target selection	Target initial priority from target selection bitmasks and OBSCONDITIONS
PROBA_RF	float32		Probability of being a QSO from Random Forest	Probability of being a quasar generated by the quasar Random Forest targeting algorithm.
PROB_OBS	float64		Probability of assignment in alt histories	The number alternative assignment histories that the target was assigned in divided by 128
PROGRAM	char[6]		DESI program type: BRIGHT, DARK, BACKUP, OTHER	DESI program type - BRIGHT, DARK, BACKUP, OTHER
PSFDEPTH_G	float32	nanomaggy^-2	PSF-based depth in g-band	PSF-based depth in g-band
PSFDEPTH_R	float32	nanomaggy^-2	PSF-based depth in r-band	PSF-based depth in r-band
PSFDEPTH_W1	float32	nanomaggy^-2	PSF-based depth in WISE W1	PSF-based depth in WISE W1
PSFDEPTH_W2	float32	nanomaggy^-2	PSF-based depth in WISE W2	PSF-based depth in WISE W2
PSFDEPTH_Z	float32	nanomaggy^-2	PSF-based depth in z-band	PSF-based depth in z-band
PSFSIZE_G	float32	arcsec	Median g-band PSF size of BRICK_PRIMARY objs	Median PSF size evaluated at the BRICK_PRIMARY objects in this brick in g-band
PSFSIZE_R	float32	arcsec	Median r-band PSF size of BRICK_PRIMARY objs	Median PSF size evaluated at the BRICK_PRIMARY objects in this brick in r-band
PSFSIZE_Z	float32	arcsec	Median z-band PSF size of BRICK_PRIMARY objs	Median PSF size evaluated at the BRICK_PRIMARY objects in this brick in z-band
PSF_TO_FIBER_SPECFLUX	float64		PSF light fraction within fiber (given seeing)	fraction of light from point-like source captured by 1.5 arcsec diameter fiber given atmospheric seeing
QSO_MASKBITS	int32		QSO Bitwise mask from imaging for potential issues	QSO Bitwise mask from the imaging indicating potential issue or blending
RA	float64	deg	Barycentric Right Ascension in ICRS	Barycentric Right Ascension in ICRS
RA_IVAR	float32	deg^-2	Inv variance of RA; w/o cos(dec) or astrom err	Inverse variance of RA (no cosine term!), excluding astrometric calibration errors
REF_CAT	char[2]		Ref catalog (T2=Tycho-2, G2=Gaia DR2, L2=SGA)	Reference catalog source for star: ‘T2’ for Tycho-2, ‘G2’ for Gaia DR2, ‘L2’ for the SGA, empty otherwise
REF_EPOCH	float32	yr	Reference epoch for Gaia/Tycho astrometry	Reference epoch for Gaia/Tycho astrometry. Typically 2015.5 for Gaia
REF_ID	int64		Tyc1*1e6+Tyc2*10+Tyc3 (Tycho); sourceid (Gaia)	Tyc1*1,000,000+Tyc2*10+Tyc3 for Tycho-2; sourceid for Gaia DR2
REF_MAG	float32	mag	Mag for IN_RADIUS: G (Gaia); VT,HP,BT (Tycho)	Magnitude used to calculate IN_RADIUS; typically, in order of preference, G-band for Gaia or VT then HP then BT for Tycho.
RELEASE	int16		Imaging surveys release ID	Imaging surveys release ID
REST_GMR_0P0	float64		Rest-frame g-r colour at redshift=0.0	Rest-frame g-r colour at redshift=0.0
REST_GMR_0P1	float64		Rest-frame g-r colour at redshift=0.1	Rest-frame g-r colour at redshift=0.1
RMS_DELTA_X	float32	mm	RMS (over exposures) fiber CS5 X loc on FP	RMS (over exposures) of the fiber difference between measured and requested CS5 X location on focal plane
RMS_DELTA_Y	float32	mm	RMS (over exposures) fiber CS5 Y loc on FP	RMS (over exposures) of the fiber difference between measured and requested CS5 Y location on focal plane
ROSETTE_NUMBER	int32		Rosette number ID [0-19]	Rosette number ID [0-19]
ROSETTE_R	float64	deg	Radius from the rosette center to the target	Radius from the center of the rosette to the target
SCND_ORDER	int32		Nb of row for target entry in secondary file	Number of row for target entry in secondary file (placeholder; needed by fiberassign)
SCND_TARGET	int64		Target select. bitmask for secondary programs	Target selection bitmask for secondary programs
SEEING_ETC	float64	arcsec	Average FWHM atm seeing during exposure (ETC)	Average FWHM atmospheric seeing during this exposure as measured by ETC
SEEING_GFA	float64	arcsec	Average FWHM atm seeing during exposure (GFA)	Average FWHM atmospheric seeing during this exposure as measured by GFA
SERSIC	float32		Sersic profile power-law index (MORPHTYPE=SER)	Power-law index for the Sersic profile model (MORPHTYPE=’SER’)
SERSIC_IVAR	float32		Inverse variance of SERSIC	Inverse variance of SERSIC
SHAPEDEV_E1	float32		deVaucouleurs shape fit ellipticity param e1	deVaucouleurs shape fit ellipticity parameter e1
SHAPEDEV_E1_IVAR	float32		Inverse variance of SHAPEDEV_E1	Inverse variance of SHAPEDEV_E1
SHAPEDEV_E2	float32		deVaucouleurs shape fit ellipticity param e2	deVaucouleurs shape fit ellipticity parameter e2
SHAPEDEV_E2_IVAR	float32		Inverse variance of SHAPEDEV_E2	Inverse variance of SHAPEDEV_E2
SHAPEDEV_R	float32	arcsec	deVaucouleurs shape half-light radius	deVaucouleurs shape half-light radius
SHAPEDEV_R_IVAR	float32	arcsec^-2	Inverse variance of SHAPEDEV_R	Inverse variance of SHAPEDEV_R
SHAPEEXP_E1	float32		Exponential shape fit ellipticity param e1	Imaging exponential shape fit ellipticity parameter e1
SHAPEEXP_E1_IVAR	float32		Inverse variance of SHAPEEXP_E1	Inverse variance of SHAPEEXP_E1
SHAPEEXP_E2	float32		Exponential shape fit ellipticity param e2	Imaging exponential shape fit ellipticity parameter e2
SHAPEEXP_E2_IVAR	float32		Inverse variance of SHAPEEXP_E2	Inverse variance of SHAPEEXP_E2
SHAPEEXP_R	float32	arcsec	Imaging exponential shape half-light radius	Imaging exponential shape half-light radius
SHAPEEXP_R_IVAR	float32	arcsec^-2	Inverse variance of SHAPEEXP_R	Inverse variance of SHAPEEXP_R
SHAPE_E1	float32		Ellipticity param e1 of galaxy model MORPHTYPE	Ellipticity component 1 of galaxy model for galaxy type MORPHTYPE
SHAPE_E1_IVAR	float32		Inverse variance of SHAPE_E1	Inverse variance of SHAPE_E1
SHAPE_E2	float32		Ellipticity param e2 of galaxy model MORPHTYPE	Ellipticity component 2 of galaxy model for galaxy type MORPHTYPE
SHAPE_E2_IVAR	float32		Inverse variance of SHAPE_E2	Inverse variance of SHAPE_E2
SHAPE_R	float32	arcsec	Half-light radius of galaxy model (>0)	Half-light radius of galaxy model (>0)
SHAPE_R_IVAR	float32	arcsec^-2	Inverse variance of SHAPE_R	Inverse variance of SHAPE_R
SIGMA_MGII	float32	Angstrom	Fitted param SIGMA (linewidth) by MgII fitter	Fitted parameter SIGMA (linewidth) by MgII fitter (in angstrom?)
SKY_MAG_AB_GFA	float64	mag arcsec^-2	Sky background in GFA passband	Sky background in the GFA passband, measured from the GFA backgrounds.
SKY_MAG_G_GFA	float64	mag arcsec^-2	Sky background in g passband	Sky background measured in the spectroscopy integrated over the DECam g passband, AB mags.
SKY_MAG_R_GFA	float64	mag arcsec^-2	Sky background in r passband	Sky background measured in the spectroscopy integrated over the DECam r passband, AB mags.
SKY_MAG_Z_GFA	float64	mag arcsec^-2	Sky background in z passband	Sky background measured in the spectroscopy integrated over the DECam z passband, AB mags.
SPECTRO	int16		Spectrograph number [0-9]	Spectrograph number [0-9]
SPECTROID	int32		Hardware ID of spectrograph (not used)	Hardware ID of spectrograph (not used)
SPECTYPE	char[6]		Best-fit spectral type: GALAXY, QSO, STAR	Spectral type of Redrock best fit template (e.g. GALAXY, QSO, STAR)
SPGRPVAL	int32		Value by which spectra are grouped for a coadd	Value by which spectra are grouped for a coadd (e.g. a YEARMMDD night)
STARDENS	float32		Density (deg-2) of stars in the position from Gaia limited to point-like sources in the range 12 < G < 17	Density (deg-2) of stars in the position from Gaia limited to point-like sources in the range 12 < G < 17 calculated using the desitarget randoms.stellar_density function
STD_FIBER_DEC	float32	arcsec	Std deviation (over exposures) of fiber DEC	Standard deviation (over exposures) of DEC of actual fiber position
STD_FIBER_RA	float32	arcsec	Std deviation (over exposures) of fiber RA	Standard deviation (over exposures) of RA of actual fiber position
SUBPRIORITY	float64		Random subpriority [0-1) to break assign ties	Random subpriority [0-1) to break assignment ties
SUBTYPE	char[20]		Spectral subtype	Spectral subtype
SUM_CALIB_COUNT_B	float64		Sum of calibrated flux in B camera	Sum of calibrated flux in B camera
SUM_CALIB_COUNT_R	float64		Sum of calibrated flux in R camera	Sum of calibrated flux in R camera
SUM_CALIB_COUNT_Z	float64		Sum of calibrated flux in Z camera	Sum of calibrated flux in Z camera
SUM_FFLAT_COUNT_B	float64		Sum of fiber-flatfielded counts B camera	Sum of fiber-flatfielded counts B camera
SUM_FFLAT_COUNT_R	float64		Sum of fiber-flatfielded counts R camera	Sum of fiber-flatfielded counts R camera
SUM_FFLAT_COUNT_Z	float64		Sum of fiber-flatfielded counts Z camera	Sum of fiber-flatfielded counts Z camera
SUM_RAW_COUNT_B	float64		Sum of raw counts in B camera	Sum of raw counts in B camera
SUM_RAW_COUNT_R	float64		Sum of raw counts in R camera	Sum of raw counts in R camera
SUM_RAW_COUNT_Z	float64		Sum of raw counts in Z camera	Sum of raw counts in Z camera
SUM_SKYSUB_COUNT_B	float64		Sum of sky-subtracted counts in B camera	Sum of sky-subtracted counts in B camera
SUM_SKYSUB_COUNT_R	float64		Sum of sky-subtracted counts in R camera	Sum of sky-subtracted counts in R camera
SUM_SKYSUB_COUNT_Z	float64		Sum of sky-subtracted counts in Z camera	Sum of sky-subtracted counts in Z camera
SURVEY	char[7]		Survey name	Survey name: cmx, sv1, sv2, sv3, main
SV1_BGS_TARGET	int64		BGS (bright time) target sel bitmask for SV1	BGS (bright time program) target selection bitmask for SV1
SV1_DESI_TARGET	int64		DESI (dark time) target sel bitmask for SV1	DESI (dark time program) target selection bitmask for SV1
SV1_MWS_TARGET	int64		MWS (bright time) target sel bitmask for SV1	MWS (bright time program) target selection bitmask for SV1
SV1_SCND_TARGET	int64		Secondary target selection bitmask for SV1	Secondary target selection bitmask for SV1
SV2_BGS_TARGET	int64		BGS (bright time) target sel bitmask for SV2	BGS (bright time program) target selection bitmask for SV2
SV2_DESI_TARGET	int64		DESI (dark time) target sel bitmask for SV2	DESI (dark time program) target selection bitmask for SV2
SV2_MWS_TARGET	int64		MWS (bright time) target sel bitmask for SV2	MWS (bright time program) target selection bitmask for SV2
SV2_SCND_TARGET	int64		Secondary target selection bitmask for SV2	Secondary target selection bitmask for SV2
SV3_BGS_TARGET	int64		BGS (bright time) target sel bitmask for SV3	BGS (bright time program) target selection bitmask for SV3
SV3_DESI_TARGET	int64		DESI (dark time) target sel bitmask for SV3	DESI (dark time program) target selection bitmask for SV3
SV3_MWS_TARGET	int64		MWS (bright time) target sel bitmask for SV3	MWS (bright time program) target selection bitmask for SV3
SV3_SCND_TARGET	int64		Secondary target selection bitmask for SV3	Secondary target selection bitmask for SV3
SV_NSPEC	int32		Number of coadded spectra in SV (SV1+2+3)	Number of coadded spectra for this TARGETID in SV (SV1+2+3)
SV_PRIMARY	bool		True if primary coadded spectrum in SV(1+2+3)	Boolean flag (True/False) for the primary coadded spectrum in SV (SV1+2+3)
TARGETID	int64		Unique DESI target ID	Unique DESI target ID
TARGETID_DATA	int64		For randoms and mocks: Unique DESI target ID of associated TILELOCID	For randoms and mocks: Unique DESI target ID of associated TILELOCID
TARGET_DEC	float64	deg	Barycentric declination in ICRS	Barycentric declination in ICRS
TARGET_RA	float64	deg	Barycentric right ascension in ICRS	Barycentric right ascension in ICRS
TARGET_STATE	char[*]		Combination of target class+current obs state	Combination of target class and its current observational state
TILEDEC	float64	deg	Barycentric declination of tile center in ICRS	Barycentric declination of tile center in ICRS
TILEID	int32		Unique DESI tile ID	Unique DESI tile ID
TILELOCID	int64		Is 10000*TILEID+LOCATION	Is 10000*TILEID+LOCATION
TILELOCIDS	char[*]		Available TILELOCIDs for a target joint by ‘-’	TILELOCIDs that the target was available for, separated by ‘-’
TILELOCID_ASSIGNED	int64		1 if the TILELOCID is assigned (0=unassigned)	0/1 for unassigned/assigned for TILELOCID in question (it could have been assigned to a different target)
TILERA	float64	deg	Barycentric R.A. of tile center in ICRS	Barycentric Right Ascension of tile center in ICRS
TILES	char[*]		Available TILEIDs for a target joined by ‘-’	TILEIDs of those tile, in string form separated by ‘-’
TIMESTAMP	str	s	UTC/ISO time when the target state was updated	UTC/ISO time at which the target state was updated
TOOID	int64		ID for this target assigned by the CHECKER	ID for this target assigned by the CHECKER
TOO_PRIO	char[2]		High-priority (HI) or low-priority (LO) target	Either ‘HI’ for a very-high-priority target or ‘LO’ for a very-low-priority target
TOO_TYPE	char[5]		Type: TILE=special tile; FIBER=fiber-override	Either ‘TILE’ for a special tile or ‘FIBER’ for a fiber-override ToO
TSNR2_BGS	float32		BGS template (S/N)^2 summed over B,R,Z	BGS template (S/N)^2 summed over B,R,Z
TSNR2_BGS_B	float32		BGS B template (S/N)^2	BGS B template (S/N)^2
TSNR2_BGS_R	float32		BGS R template (S/N)^2	BGS R template (S/N)^2
TSNR2_BGS_Z	float32		BGS Z template (S/N)^2	BGS Z template (S/N)^2
TSNR2_ELG	float32		ELG template (S/N)^2 summed over B,R,Z	ELG template (S/N)^2 summed over B,R,Z
TSNR2_ELG_B	float32		ELG B template (S/N)^2	ELG B template (S/N)^2
TSNR2_ELG_R	float32		ELG R template (S/N)^2	ELG R template (S/N)^2
TSNR2_ELG_Z	float32		ELG Z template (S/N)^2	ELG Z template (S/N)^2
TSNR2_GPBBACKUP	float64		Template (S/N)^2 for backup targets in BPB	template (S/N)^2 for backup targets in guider pass band
TSNR2_GPBBACKUP_B	float64		Template (S/N)^2 for backup targets in GPB (B)	template (S/N)^2 for backup targets in guider pass band on B
TSNR2_GPBBACKUP_R	float64		Template (S/N)^2 for backup targets in GPB (R)	template (S/N)^2 for backup targets in guider pass band on R
TSNR2_GPBBACKUP_Z	float64		Template (S/N)^2 for backup targets in GPB (Z)	template (S/N)^2 for backup targets in guider pass band on Z
TSNR2_GPBBRIGHT	float64		Template (S/N)^2 for bright targets in BPB	template (S/N)^2 for bright targets in guider pass band
TSNR2_GPBBRIGHT_B	float64		Template (S/N)^2 for bright targets in BPB (B)	template (S/N)^2 for bright targets in guider pass band on B
TSNR2_GPBBRIGHT_R	float64		Template (S/N)^2 for bright targets in BPB (R)	template (S/N)^2 for bright targets in guider pass band on R
TSNR2_GPBBRIGHT_Z	float64		Template (S/N)^2 for bright targets in BPB (Z)	template (S/N)^2 for bright targets in guider pass band on Z
TSNR2_GPBDARK	float64		Template (S/N)^2 for dark targets in BPB	template (S/N)^2 for dark targets in guider pass band
TSNR2_GPBDARK_B	float64		Template (S/N)^2 for dark targets in BPB (B)	template (S/N)^2 for dark targets in guider pass band on B
TSNR2_GPBDARK_R	float64		Template (S/N)^2 for dark targets in BPB (R)	template (S/N)^2 for dark targets in guider pass band on R
TSNR2_GPBDARK_Z	float64		Template (S/N)^2 for dark targets in BPB (Z)	template (S/N)^2 for dark targets in guider pass band on Z
TSNR2_LRG	float32		LRG template (S/N)^2 summed over B,R,Z	LRG template (S/N)^2 summed over B,R,Z
TSNR2_LRG_B	float32		LRG B template (S/N)^2	LRG B template (S/N)^2
TSNR2_LRG_R	float32		LRG R template (S/N)^2	LRG R template (S/N)^2
TSNR2_LRG_Z	float32		LRG Z template (S/N)^2	LRG Z template (S/N)^2
TSNR2_LYA	float32		LYA template (S/N)^2 summed over B,R,Z	LYA template (S/N)^2 summed over B,R,Z
TSNR2_LYA_B	float32		LYA B template (S/N)^2	LYA B template (S/N)^2
TSNR2_LYA_R	float32		LYA R template (S/N)^2	LYA R template (S/N)^2
TSNR2_LYA_Z	float32		LYA Z template (S/N)^2	LYA Z template (S/N)^2
TSNR2_QSO	float32		QSO template (S/N)^2 summed over B,R,Z	QSO template (S/N)^2 summed over B,R,Z
TSNR2_QSO_B	float32		QSO B template (S/N)^2	QSO B template (S/N)^2
TSNR2_QSO_R	float32		QSO R template (S/N)^2	QSO R template (S/N)^2
TSNR2_QSO_Z	float32		QSO Z template (S/N)^2	QSO Z template (S/N)^2
TYPE	char[4]		Tractor morphological model type (MORPHTYPE)	Morphological Model type from Tractor; renamed MORPHTYPE in most files
URAT_ID	int64		ID in URAT catalog if applicable (ex: no Gaia)	ID in the URAT catalog for sources where URAT supplemented missing Gaia astrometric information
URAT_SEP	float32	arcsec	Separation b/w URAT and Gaia sources, if appl.	Separation between URAT and Gaia sources where URAT supplemented missing Gaia astrometric information
VAR_A_MGII	float32		Variance of MgII fit amplitude parameter A	Variance of MgII fit amplitude parameter A
VAR_B_MGII	float32		Variance of MgII fit offset parameter B	Variance of MgII fit offset parameter B
VAR_SIGMA_MGII	float32		Variance of MgII fit width parameter sigma	Variance of MgII fit width parameter sigma
VERSION	char[14]		Tag of desitarget used to make target catalog	Tag of desitarget used to create the target catalog
WEIGHT	float64		The combination of all weights to use	The combination of all weights to use
WEIGHT_COMP	float64		1/FRACZ_TILELOCID	1/FRACZ_TILELOCID
WEIGHT_FKP	float64		1/(1+NZ*P0), with P0 different for each tracer	1/(1+NZ*P0), with P0 different for each tracer
WEIGHT_FKP_NTILE	float64		Mean FKP weights as a function of the number of overlapping tiles in the PIP version LSS catalogs	Mean FKP weights as a function of the number of overlapping tiles in the PIP version LSS catalogs (to be used in the angular pair-counts used for angular up-weighting)
WEIGHT_IMLIN	float64		Imaging systematics weights derived with the eBOSS linear regression method	Imaging systematics weights derived with the eBOSS linear regression method
WEIGHT_NTILE	float64		Effective weight as a function of the number of overlapping tiles in the PIP version LSS catalogs	Effective weight as a function of the number of overlapping tiles in the PIP version LSS catalogs (to be used in the angular pair-counts used for angular up-weighting)
WEIGHT_RF	float64		Imaging systematics weights derived with the regressis random forest regression method	Imaging systematics weights derived with the regressis random forest regression method
WEIGHT_SN	float64		Imaging systematics weights derived with the sysnet NN regression method	Imaging systematics weights derived with the sysnet NN regression method
WEIGHT_SYS	float64		Correction for imaging conditions; RF method	Correction for fluctuations in projected density with imaging conditions, from random forrest method
WEIGHT_SYSEB	float64		Corr for imaging conditions; eBOSS lin regress	Correction for fluctuations in projected density with imaging conditions, from linear regression method applied to eBOSS
WEIGHT_ZFAIL	float64		Should be all 1 at this point for main survey	Should be all 1 at this point for main survey
WISEMASK_W1	byte		Bitwise mask for WISE W1 data	Bitwise mask for WISE W1 data
WISEMASK_W2	byte		Bitwise mask for WISE W2 data	Bitwise mask for WISE W2 data
Z	float64		Redshift measured by Redrock	Redshift measured by Redrock
ZCAT_NSPEC	int32		Nb of coadded spectra for TARGETID in catalog	Number of times this TARGETID appears in this catalog
ZCAT_PRIMARY	bool		True if primary coadded spectrum in catalog	Boolean flag (True/False) for the primary coadded spectrum in this zcatalog
ZERR	float64		Redshift error from redrock	Redshift error from redrock
ZPOSSLOC	bool		Whether location is possible for target class	True/False whether the location could have been assigned to the given target class
ZTILEID	int32		ID of latest tile that updated target state	ID of tile that most recently updated target’s state
ZWARN	int64		Redshift warning bitmask from Redrock	Redshift warning bitmask from Redrock
ZWARN_MTL	int64		ZWARN from the zmtl file (contains extra bits)	The ZWARN from the zmtl file (contains extra bits)
Z_CIII	float64		Redshift estimated by QuasarNET with CIII line	Redshift estimated by QuasarNET with CIII line
Z_CIV	float64		Redshift estimated by QuasarNET with CIV line	Redshift estimated by QuasarNET with CIV line
Z_HP	float64		Redshift from Healpix coadd	Redshift from Healpix coadd
Z_Halpha	float64		Redshift estimated by QuasarNET wHalpha line	Redshift estimated by QuasarNET with Halpha line
Z_Hbeta	float64		Redshift estimated by QuasarNET wHbeta line	Redshift estimated by QuasarNET with Hbeta line
Z_LYA	float64		Redshift estimated by QuasarNET with LyA line	Redshift estimated by QuasarNET with LyA line
Z_MgII	float64		Redshift estimated by QuasarNET with MgII line	Redshift estimated by QuasarNET with MgII line
Z_QN	float64		Redshift by QuasarNET; highest confidence line	Redshift measured by QuasarNET using line with highest confidence
Z_QN_CONF	float64		Redshift confidence from QuasarNET	Redshift confidence from QuasarNET
Z_RR	float64		Redshift collected from redrock file	Redshift collected from redrock file
Z_not4clus	float64		Redshift that eventually gets propagated as Z to the clustering catalogs (the ‘_not4clus’ aids in the blinding process)	Redshift that eventually gets propagated as Z to the clustering catalogs (the ‘_not4clus’ aids in the blinding process)
mod_success_rate	float64		Expected spectroscopic success rate given the target and observation properties	Expected spectroscopic success rate given the target and observation properties