The ‘full’ LSS catalogs for randoms

Summary:

LSS catalogs containing information on all of the random targets identified as reachable by DESI fiberassign, for one of the input randoms. The files are split by target type, random file number, and whether of not vetos for angular positions have been applied.

Naming Convention:

{TARGET}_{RANN}_full{VETO}.ran.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. {RANN} is the number between 0 and 17 designating the given random file, and {VETO} is _noveto if vetos have not been applied and blank otherwise.

Regex:

[a-zA-Z_]+\_[0-9]+\_full[a-z_]{0,7}.ran.fits

File Type:

FITS, 1 GB

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 of randoms

Required Header Keywords

Required Header Keywords Table

KEY	Example Value	Type	Comment
NAXIS1	259	int	width of table in bytes
NAXIS2	4469949	int	number of rows in table
DESIDR	edr	str	DESI Data Release

Required Data Table Columns

Name	Type	Units	Description
LOCATION	int64		Location on the focal plane PETAL_LOC*1000 + DEVICE_LOC
FIBER	int32		Fiber ID on the CCDs [0-4999]
TARGETID	int64		Unique DESI target ID
RA	float64	deg	Target Right Ascension
DEC	float64	deg	Target declination
TILEID	int64		Unique DESI tile ID
ZWARN	int64		Redshift warning bitmask from Redrock
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
PRIORITY	int32		Target current priority
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
TILELOCID	int64		Is 10000*TILEID+LOCATION
GOODHARDLOC	logical		True/False whether the fiber had good hardware
ZPOSSLOC	logical		True/False whether the location could have been assigned to the given target class
NTILE	int64		Number of tiles target was available on
TILES	char[51]		TILEIDs of those tile, in string form separated by -
TILELOCIDS	char[159]		TILELOCIDs that the target was available for, separated by -
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
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
PSFDEPTH_W1	float32	nanomaggy^-2	PSF-based depth in WISE W1
PSFDEPTH_W2	float32	nanomaggy^-2	PSF-based depth in WISE W2
PSFSIZE_G	float32	arcsec	Median PSF size evaluated at the BRICK_PRIMARY objects in this brick in g-band
PSFSIZE_R	float32	arcsec	Median PSF size evaluated at the BRICK_PRIMARY objects in this brick in r-band
PSFSIZE_Z	float32	arcsec	Median PSF size evaluated at the BRICK_PRIMARY objects in this brick in z-band
APFLUX_G	float32	nanomaggy	Total flux in nanomaggies extracted in a 0.75 arcsec radius in the g band at this location
APFLUX_R	float32	nanomaggy	Total flux in nanomaggies extracted in a 0.75 arcsec radius in the r band at this location
APFLUX_Z	float32	nanomaggy	Total flux in nanomaggies extracted in a 0.75 arcsec radius in the z band at this location
APFLUX_IVAR_G	float32	nanomaggy^-2	Inverse variance of APFLUX_G
APFLUX_IVAR_R	float32	nanomaggy^-2	Inverse variance of APFLUX_R
APFLUX_IVAR_Z	float32	nanomaggy^-2	Inverse variance of APFLUX_Z
MASKBITS	int16		Bitwise mask from the imaging indicating potential issue or blending
WISEMASK_W1	binary		Bitwise mask for WISE W1 data
WISEMASK_W2	binary		Bitwise mask for WISE W2 data
EBV	float32	mag	Galactic extinction E(B-V) reddening from SFD98
PHOTSYS	char[1]		N for the MzLS/BASS photometric system, S for DECaLS
HPXPIXEL	int64		HEALPixel containing this location at NSIDE=64 in the NESTED scheme
GOODPRI	logical		True/False whether the priority of what was assigned to the location was less or equals to the base priority of the given target class
GOODTSNR	logical		True/False whether the TSNR (class) value used was above the minimum threshold for the given target class
ROSETTE_NUMBER	int32		Rosette number ID [0-19] (only present in EDR)
ROSETTE_R	float64	deg	Radius from the center of the rosette to the target (only present in EDR)
COMP_TILE	float64		Assignment completeness for all targets of this type with the same value for TILES
LRG_MASK [1]	binary		(lower or uppercase) Imaging mask bits relevant to LRG targets

[1]

Only present in LRG samples