Y6 CLUSTER WAZP (des_y6_gold.y6_cluster_wazp)
The table has -1 rows, 22 columns.
Description
In Benoist et al. (2025), we present and characterize the galaxy cluster catalog detected by the WaZP cluster finder on the full six years of DES-Y6 observations. WaZP is not based on red-sequence identification. The full catalog contains over 400,000 detected clusters with richnesses Ngals above 5 and reaching redshifts up to z = 1.3. We also provide a cosmology version in which observation depth and richness are homogenized, containing 33,000 rich clusters (Ngals > 25), flagged by in_cosmo. Compared with the DES-Y1 WaZP catalog, essentially all clusters within the common footprint and depth limit are recovered. Deeper DES-Y6 observations and a more complete spectroscopic redshift sample improve cluster redshifts, with average scatter of 1.4% and offset of 0.2%. Optical clusters are cross-matched with SZE samples from the South Pole Telescope (SPT) and the Atacama Cosmology Telescope (ACT): essentially all SZE clusters with reasonable overlapping footprint have a WaZP counterpart; conversely, 90% of optical detections with Ngals > 150 have a counterpart in the deeper SZE survey regions. About 15–20% of SZE-matched systems have more than one possible WaZP counterpart at the same redshift within the SZE R500c, suggesting interacting or unrelaxed systems. WaZP and SZE centerings are consistent given the optical and SZE beams.
Attribution
Benoist et al. (2025). WaZP galaxy cluster catalog on DES-Y6.
Columns
| Name | Type | UCD | Unit | Description |
|---|---|---|---|---|
| name | char |
meta.id meta.main |
Cluster name in the format WAZP DESY6 JHHMM.m+DDMM |
|
| id | long |
meta.id meta.main |
Cluster ranked by SNR, linked to members catalog |
|
| ra | double |
pos.eq.ra meta.main |
deg |
Right Ascension in degrees |
| dec | double |
pos.eq.dec meta.main |
deg |
Declination in degrees |
| zphot | double | src.redshift.phot |
Cluster photometric redshift |
|
| zspec | double | src.redshift |
Cluster spectroscopic redshift, when available |
|
| zspec_unc | double |
stat.error src.redshift |
Uncertainty on cluster spectroscopic redshift |
|
| zspec_type | char |
meta.code src.redshift |
Type of cluster spectroscopic redshift |
|
| snr | double | stat.snr |
Signal to Noise Ratio |
|
| ngals | double | meta.number |
Richness, sum of Pmem's down to m*+1.5 and within RADIUS_MPC |
|
| ngals_unc | double |
stat.error meta.number |
Uncertainty on NGALS |
|
| radius_mpc | double | phys.size.radius | Mpc |
radius in Mpc |
| radius_amin | double |
phys.angSize phys.size.radius |
arcmin |
same as RADIUS_MPC in arcmin at cluster redshift |
| cover_frac_1mpc | double |
instr.det phys.angArea obs.field |
Area fraction covered with a 1.0 Mpc radius disk centered on cluster |
|
| cover_frac_1mpc_weighted | double |
instr.det phys.angArea obs.field stat.weight |
Area fraction covered with a 1.0 Mpc radius disk centered on cluster weighted with a 2D NFW profile |
|
| id_cg | long |
meta.id meta.main |
ID of the central galaxy (-1 when unavailable) |
|
| ra_cg | double | pos.eq.ra | deg |
RA of the CG |
| dec_cg | double | pos.eq.dec | deg |
DEC of the CG |
| in_cosmo | boolean |
meta.code src |
Is cluster part of the cosmology sample |
|
| sze_act_id | char |
meta.id meta.main |
ID of ACT detection used in section 4.3 |
|
| sze_spt_id | char |
meta.id meta.main |
ID of SPT detection used in section 4.3 |
|
| sze_spt_source | char |
meta.bib meta.reference |
Reference of SPT source catalog for SZE_SPT_ID |