The “full” LSS catalogs for data

Summary:

LSS catalogs containing information on all targets identified as reachable by DESI fiberassign, with one entry for each. The files are split by target type and whether of not vetos for angular positions have been applied.

Naming Convention:

{TARGET}_full{VETO}.dat.fits, where {TARGET} is the target type: QSO, ELG, ELGnotqso, ELG_HIP, ELG_HIPnotqso, LRG, LRG_main, for dark or BGS_ANY, BGS_BRIGHT for bright. {VETO} is _noveto if vetos have not been applied and blank otherwise

Regex:

[a-zA-Z_]+\_full[a-z_]{0,7}.dat.fits

File Type:

FITS, 1 GB (size varies considerably depending on target type)

Contents

Number	EXTNAME	Type	Contents
HDU0		IMAGE	Empty HDU
HDU1	LSS	BINTABLE	Catalog data

FITS Header Units

HDU0

This HDU has no non-standard required keywords.

Empty HDU.

HDU1

EXTNAME = LSS

Catalog data for the given target type; one entry per unique TARGETID

Required Header Keywords

Required Header Keywords Table

KEY	Example Value	Type	Comment
NAXIS1	712	int	width of table in bytes
NAXIS2	1781907	int	number of rows in table
DESIDR	edr	str	DESI Data Release

Required Data Table Columns

Name	Type	Units	Description
RA	float64	deg	Target Right Ascension
DEC	float64	deg	Target declination
TARGETID	int64		Unique DESI target ID
SV3_DESI_TARGET	int64		DESI (dark time program) target selection bitmask for SV3
SV3_BGS_TARGET	int64		BGS (bright time program) target selection bitmask for SV3
SV3_MWS_TARGET	int64		MWS (bright time program) target selection bitmask for SV3
PRIORITY_INIT	int64		Target initial priority from target selection bitmasks and OBSCONDITIONS
TARGET_STATE	char[30]		Combination of target class and its current observational state
TIMESTAMP	char[25]	s	UTC/ISO time at which the target state was updated
ZWARN_MTL	int64		The ZWARN from the zmtl file (contains extra bits)
PRIORITY	int64		Target current priority
LOCATION	int64		Location on the focal plane PETAL_LOC*1000 + DEVICE_LOC
TILEID	int64		Unique DESI tile ID
TILELOCID	int64		Is 10000*TILEID+LOCATION
Z	float64		Redshift measured by Redrock
Z_HP	float64		Redshift from Healpix coadd
ZERR	float64		Redshift error from redrock
ZWARN	int64		Redshift warning bitmask from Redrock
CHI2	float64		Best fit chi squared
COEFF	float64[10]		Redrock template coefficients
NPIXELS	int64		Number of unmasked pixels contributing to the Redrock fit
SPECTYPE	char[6]		Spectral type of Redrock best fit template (e.g. GALAXY, QSO, STAR)
SUBTYPE	char[20]		Spectral subtype
NCOEFF	int64		Number of Redrock template coefficients
DELTACHI2	float64		chi2 difference between first- and second-best redrock template fits
FIBER	int32		Fiber ID on the CCDs [0-4999]
COADD_FIBERSTATUS	int32		bitwise-AND of input FIBERSTATUS
FIBERASSIGN_X	float32	mm	Fiberassign expected CS5 X location on focal plane
FIBERASSIGN_Y	float32	mm	Fiberassign expected CS5 Y location on focal plane
COADD_NUMEXP	int16		Number of exposures in coadd
COADD_EXPTIME	float32	s	Summed exposure time for coadd
COADD_NUMNIGHT	int16		Number of nights in coadd
MEAN_DELTA_X	float32	mm	Mean (over exposures) fiber difference requested - actual CS5 X location on focal plane
RMS_DELTA_X	float32	mm	RMS (over exposures) of the fiber difference between measured and requested CS5 X location on focal plane
MEAN_DELTA_Y	float32	mm	Mean (over exposures) fiber difference requested - actual CS5 Y location on focal plane
RMS_DELTA_Y	float32	mm	RMS (over exposures) of the fiber difference between measured and requested CS5 Y location on focal plane
MEAN_PSF_TO_FIBER_SPECFLUX	float32		Mean of input exposures fraction of light from point-like source captured by 1.5 arcsec diameter fiber given atmospheric seeing
TSNR2_ELG_B	float32		ELG B template (S/N)^2
TSNR2_LYA_B	float32		LYA B template (S/N)^2
TSNR2_BGS_B	float32		BGS B template (S/N)^2
TSNR2_QSO_B	float32		QSO B template (S/N)^2
TSNR2_LRG_B	float32		LRG B template (S/N)^2
TSNR2_ELG_R	float32		ELG R template (S/N)^2
TSNR2_LYA_R	float32		LYA R template (S/N)^2
TSNR2_BGS_R	float32		BGS R template (S/N)^2
TSNR2_QSO_R	float32		QSO R template (S/N)^2
TSNR2_LRG_R	float32		LRG R template (S/N)^2
TSNR2_ELG_Z	float32		ELG Z template (S/N)^2
TSNR2_LYA_Z	float32		LYA Z template (S/N)^2
TSNR2_BGS_Z	float32		BGS Z template (S/N)^2
TSNR2_QSO_Z	float32		QSO Z template (S/N)^2
TSNR2_LRG_Z	float32		LRG Z template (S/N)^2
TSNR2_ELG	float32		ELG template (S/N)^2 summed over B,R,Z
TSNR2_LYA	float32		LYA template (S/N)^2 summed over B,R,Z
TSNR2_BGS	float32		BGS template (S/N)^2 summed over B,R,Z
TSNR2_QSO	float32		QSO template (S/N)^2 summed over B,R,Z
TSNR2_LRG	float32		LRG template (S/N)^2 summed over B,R,Z
GOODHARDLOC	logical		True/False whether the fiber had good hardware
RELEASE	int16		Imaging surveys release ID
BRICKID	int32		Brick ID from tractor input
BRICKNAME	char[8]		Brick name from tractor input
BRICK_OBJID	int32		Imaging Surveys OBJID on that brick
MORPHTYPE	char[4]		Imaging Surveys morphological type from Tractor
EBV	float32	mag	Galactic extinction E(B-V) reddening from SFD98
FLUX_G	float32	nanomaggy	Flux in the Legacy Survey g-band (AB)
FLUX_R	float32	nanomaggy	Flux in the Legacy Survey r-band (AB)
FLUX_Z	float32	nanomaggy	Flux in the Legacy Survey z-band (AB)
FLUX_IVAR_G	float32	nanomaggy^-2	Inverse variance of FLUX_G (AB)
FLUX_IVAR_R	float32	nanomaggy^-2	Inverse variance of FLUX_R (AB)
FLUX_IVAR_Z	float32	nanomaggy^-2	Inverse variance of FLUX_Z (AB)
MW_TRANSMISSION_G	float32		Milky Way dust transmission in LS g-band
MW_TRANSMISSION_R	float32		Milky Way dust transmission in LS r-band
MW_TRANSMISSION_Z	float32		Milky Way dust transmission in LS z-band
NOBS_G	int16		Number of images for central pixel in g-band
NOBS_R	int16		Number of images for central pixel in r-band
NOBS_Z	int16		Number of images for central pixel in z-band
PSFDEPTH_G	float32	nanomaggy^-2	PSF-based depth in g-band
PSFDEPTH_R	float32	nanomaggy^-2	PSF-based depth in r-band
PSFDEPTH_Z	float32	nanomaggy^-2	PSF-based depth in z-band
GALDEPTH_G	float32	nanomaggy^-2	Galaxy model-based depth in g-band
GALDEPTH_R	float32	nanomaggy^-2	Galaxy model-based depth in r-band
GALDEPTH_Z	float32	nanomaggy^-2	Galaxy model-based depth in z-band
FLUX_W1	float32	nanomaggy	WISE flux in W1 (AB)
FLUX_W2	float32	nanomaggy	WISE flux in W2 (AB)
FLUX_IVAR_W1	float32	nanomaggy^-2	Inverse variance of FLUX_W1 (AB)
FLUX_IVAR_W2	float32	nanomaggy^-2	Inverse variance of FLUX_W2 (AB)
MW_TRANSMISSION_W1	float32		Milky Way dust transmission in WISE W1
MW_TRANSMISSION_W2	float32		Milky Way dust transmission in WISE W2
FIBERFLUX_G	float32	nanomaggy	Predicted g-band flux within a fiber of diameter 1.5 arcsec from this object in 1 arcsec Gaussian seeing
FIBERFLUX_R	float32	nanomaggy	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 z-band flux within a fiber of diameter 1.5 arcsec from this object in 1 arcsec Gaussian seeing
FIBERTOTFLUX_G	float32	nanomaggy	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 r-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 z-band flux within a fiber of diameter 1.5 arcsec from all sources at this location in 1 arcsec Gaussian seeing
WISEMASK_W1	binary		Bitwise mask for WISE W1 data
WISEMASK_W2	binary		Bitwise mask for WISE W2 data
MASKBITS	int16		Bitwise mask from the imaging indicating potential issue or blending
SHAPE_R	float32	arcsec	Half-light radius of galaxy model (>0)
PHOTSYS	char[1]		‘N’ for the MzLS/BASS photometric system, ‘S’ for DECaLS
NTILE	int64		Number of tiles target was available on
TILES	char[51]		TILEIDs of those tile, in string form separated by ‘-’
TILELOCIDS	char[151]		TILELOCIDs that the target was available for, separated by ‘-’
LOCATION_ASSIGNED	logical		True/False for assigned/unassigned for the target in question
TILELOCID_ASSIGNED	int64		0/1 for unassigned/assigned for TILELOCID in question (it could have been assigned to a different target)
GOODTSNR	logical		True/False whether the TSNR_<class> value used was above the minimum threshold for the given target class
COMP_TILE	float64		Assignment completeness for all targets of this type with the same value for TILES
ROSETTE_NUMBER	int32		Rosette number ID [0-19]
ROSETTE_R	float64	deg	Radius from the center of the rosette to the target
FRACZ_TILELOCID	float64		The fraction of targets of this type at this TILELOCID that received an observation (after forcing each target to a unique TILELOCID)
BITWEIGHTS	int64[2]		A size of two 64 bit masks that encodes which of the alternative assignment histories that the target was assigned in
PROB_OBS	float64		The number alternative assignment histories that the target was assigned in divided by 128
LRG_MASK [1]	binary		Imaging mask bits relevant to LRG targets
OII_FLUX [1]	float32		Fitted flux for the [OII] doublet
OII_FLUX_IVAR [1]	float32		Inverse variance of the fitted flux for the [OII] doublet
O2C [1]	float64		The criteria for assessing strength of OII emission for ELG observations
Z_RR [1]	float64		Redshift collected from redrock file

[1] (1,2,3,4,5)

Optional. LRG_MASK only available for LRG samples. OII_FLUX, OII_FLUX_IVAR and O2C only present in ELG samples. Z_RR only present in QSO samples