Planck Union Catalog of SZ Clusters (SZ Union)

About the SZ Union Catalog

These catalogs contain a list of galaxy clusters detected through the Sunyaev-Zel'dovich effect (SZ) and consist of candidate sources that were detected using multifrequency algorithms that use the distinct spectral signature of such clusters. This version of the SZ catalogs is a component of Planck Data Release 2.

Three pipelines are used to detect SZ clusters: two independent implementations of the Matched Multi-Filter (MMF1 and MMF3), and PowellSnakes (PwS). The main catalog is constructed as the union of the catalogs from the three detection methods. The individual catalogs are provided for the expert user in order to assess the consistency of the pipelines. The union catalogue contains the coordinates and the signal-to-noise ratio of the detections and a summary of the external validation information, including external identification of a cluster and its redshift if it is available.

Name Intype Units Description
INDX int None Index - Used to cross-reference with individual catalogs
NAME char None Source Name
GLON double degrees Galactic longitude
GLAT double degrees Galactic latitude
RA double degrees Right ascension (J2000) transformed from (GLON,GLAT)
DEC double degrees Declination (J2000) transformed from (GLON,GLAT)
POS_ERR double arcmin Position uncertainty (95% confidence interval)
SNR double None Signal-to-noise ratio of the detection
PIPELINE int None Source pipeline: 1=MMF1; 2=MMF3; 3=PwS
PIPE_DET int None Pipelines which detect this object: hundreds digit = MMF1, tens digit = MMF3, units = PwS
PCCS2 int None Indicates whether this detection matches any PCCS source
PSZ int None Index of matching detection in PSZ1, or -1 if new detection
IR_FLAG int None Flag denoting heavy infrared contamination
Q_NEURAL double None Neural network quality flag (1-Q_bad, following the definitions in Aghanim et al. 2014)
Y5R500 double 10^-3 arcmin^2 Mean marginal Y_5R500 as determined by reference pipeline
Y5R500_ERR double 10^-3 arcmin^2 Uncertainty on Y_5R500 as determined by reference pipeline
VALID int None External validation status
REDSHIFT_ID char None External identifier of cluster
REDSHIFT double None Redshift of cluster
MSZ double 10^14 Msol SZ mass proxy
MSZ_ERR_UP double 10^14 Msol Upper bound of 68% SZ mass proxy confidence interval
MSZ_ERR_LOW double 10^14 Msol Lower bound of 68% SZ mass proxy confidence interval
MCXC char None Identifier of X-ray counterpart in the MCXC
REDMAPPER char None Identifier of optical counterpart in the RedMAPPer catalogue
ACT char None Identifier of SZ counterpart in the ACT catalogues
SPT char None Identifier of SZ counterpart in the SPT catalogues
WISE_FLAG int None Confirmation flag of WISE overdensity
AMI_EVIDENCE double None Bayesian evidence for AMI counterpart detection
COSMO int None Detection is in the cosmology sample
CMNT char None Comments on this detection