Clustering LSS catalogs for randoms

Summary:

For each target type, LSS catalogs for the randoms, ready to be used for clustering measurements, are provided.

Naming Convention:

{TARGET}_{PHOTSYS}_{RANN}_clustering.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. {PHOTSYS} is the photometric region N or S and {RANN} is the number for the random file (18 total, numbered 0 through 17). Each are random with respect to each other.

Regex:

[a-zA-Z_]+\_[NS]_[0-9]+\_clustering.ran.fits

File Type:

FITS, 193 MB

Contents

Number

EXTNAME

Type

Contents

HDU0

IMAGE

Empty

HDU1

LSS

BINTABLE

Catalog data

FITS Header Units

HDU0

This HDU has no non-standard required keywords.

Empty HDU.

HDU1

EXTNAME = LSS

Random catalog for clustering statistics

Required Header Keywords

Required Header Keywords Table

KEY

Example Value

Type

Comment

NAXIS1

115

int

width of table in bytes

NAXIS2

1763774

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

NTILE

int64

Number of tiles target was available on

TILES

char[*]

TILEIDs of those tile, in string form separated by -

Z

float64

Redshift measured by Redrock

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] (Only present in EDR)

ROSETTE_R

float64

deg

Radius from the center of the rosette to the target (Only present in EDR)

WEIGHT

float64

The combination of all weights to use

FLUX_G_DERED [1]

float32

nanomaggy

(lower or uppercase) Flux in the g-band after correcting for Galactic extinction (AB system)

FLUX_R_DERED [1]

float32

nanomaggy

(lower or uppercase) Flux in the r-band after correcting for Galactic extinction (AB system)

FLUX_Z_DERED [1]

float32

nanomaggy

(lower or uppercase) Flux in the z-band after correcting for Galactic extinction (AB system)

FLUX_W1_DERED [1]

float32

nanomaggy

(lower or uppercase) Flux in the WISE W1-band after correcting for Galactic extinction (AB system)

FLUX_W2_DERED [1]

float32

nanomaggy

(lower or uppercase) Flux in the WISE W2-band after correcting for Galactic extinction (AB system)

REST_GMR_0P1 [1]

float64

Rest-frame g-r colour at redshift=0.1

KCORR_R0P1 [1]

float64

r-band k-correction at redshift=0.1

KCORR_G0P1 [1]

float64

g-band k-correction at redshift=0.1

KCORR_R0P0 [1]

float64

r-band k-correction at redshift=0.0

KCORR_G0P0 [1]

float64

g-band k-correction at redshift=0.0

REST_GMR_0P0 [1]

float64

Rest-frame g-r colour at redshift=0.0

EQ_ALL_0P0 [1]

float64

e-correction at redshift=0.0

EQ_ALL_0P1 [1]

float64

e-correction at redshift=0.1

ABSMAG_R [1]

float64

Absolute magnitude in the r-band after k-correction

NZ

float64

h^3 Mpc^-3

The comoving number density of the tracer at the given redshift, assuming complete sample

WEIGHT_FKP

float64

1/(1+NZ*P0), with P0 different for each tracer