Cluster catalog
We present a catalog of 1543 candidate galaxy clusters found in the DR2 release
of the Kilo-Degree Survey (KiDS), covering an area of 114 sq. degrees, in the
redshift range 0 ≤ z ≤ 0.7. Based on simulated data, we derived a completeness
of ~ 85% and a purity of at least 80%.
The catalog also includes the positions and magnitudes of the galaxies identified as
the BCG in each cluster, as well as an estimate of the cluster masses, computed using the number
of candidate cluster member galaxies as a proxy. Due to the limited area available
in KiDS DR2, the calibration of the richness-mass relation is still preliminary,
and will be improved in the next releases.
Catalog download
The link to the catalog, in ASCII format, is provided below. The catalog is also available on CDS.
- KDR2_clusters.asc (181 KB)
Acknowledgements
Users of these data should cite Radovich et al. (2017, A&A, 598, A107) and include the KiDS DR2 acknowledgements.
Catalog description
The table below provides brief descriptions for the catalog columns. We refer to Radovich et al. (2017, A&A, 598, A107) for details on how the catalog was obtained and a more detailed description of its content and characteristics.
| Label | Description |
|---|---|
| ID | Cluster name (KDR2_JHHMMSS.s+DDMMSS) |
| RA | Cluster Right Ascension in decimal degrees (J2000) |
| DEC | Cluster Declination in decimal degrees (J2000) |
| z | Photometric redshift of cluster |
| snr | Signal to noise of cluster detection |
| RA_bcg | BCG Right Ascension in decimal degrees (J2000) |
| DEC_bcg | BCG Declination in decimal degrees (J2000) |
| rmag | BCG r band magnitude |
| N500 | Number of member galaxy candidates within R500 |
| R500 | Radius at Delta=500 (Mpc) |
| M500 | Cluster mass within R500 (1014 Msun) |
| errM500 | Uncertainty on M500 |
| N200 | Number of member galaxy candidates within R500 |
| R200 | Radius at Delta=200 (Mpc) |
| M200 | Cluster mass within R200 (1014 Msun) |
| errM200 | Uncertainty on M200 |