Clustering LSS catalogs for data
- Summary:
For each target type, LSS catalogs for the data, ready to be used for clustering measurements, are provided.
- Naming Convention:
{TARGET}_{PHOTSYS}_clustering.dat.fits, where{TARGET}is the target:QSO,ELG,ELGnotqso,ELG_HIP,ELG_HIPnotqso,LRG,LRG_main, for dark orBGS_ANY,BGS_BRIGHTfor bright.{PHOTSYS}is the photometric regionNorS.- Regex:
[a-zA-Z_]+_[NS]_clustering.dat.fits- File Type:
FITS, 8 MB
Contents
Number |
EXTNAME |
Type |
Contents |
|---|---|---|---|
IMAGE |
Empty |
||
LSS |
BINTABLE |
Catalog data |
FITS Header Units
HDU0
This HDU has no non-standard required keywords.
Empty HDU.
HDU1
EXTNAME = LSS
LSS catalogs for clustering measurements
Required Header Keywords
Required Header Keywords Table
KEY |
Example Value |
Type |
Comment |
|---|---|---|---|
NAXIS1 |
123 |
int |
width of table in bytes |
NAXIS2 |
71051 |
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) |
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 |
|
WEIGHT_ZFAIL |
float64 |
Should be all 1 at this point for main survey |
|
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 |