PLANCKSZ2 ivo://nasa.heasarc/plancksz2 NASA/GSFC HEASARC Planck Collaboration 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source This table contains the all-sky Planck catalog of Sunyaev-Zeldovich (SZ) sources detected from the 29 month full Planck mission data. The catalog (PSZ2) is the largest SZ-selected sample of galaxy clusters yet produced and the deepest systematic all-sky survey of galaxy clusters. It contains 1,653 detections, of which 1,203 are confirmed clusters with identified counterparts in external data sets, and is the first SZ-selected cluster survey containing more than 10<sup>3</sup> confirmed clusters. In the reference paper, the authors present a detailed analysis of the survey selection function in terms of its completeness and statistical reliability, placing a lower limit of 83% on the purity. Using simulations, they find that the estimates of the SZ strength parameter Y<sub>5R500</sub> are robust to pressure-profile variation and beam systematics, but accurate conversion to Y<sub>500</sub> requires the use of prior information on the cluster extent. The authors also describe the multi-wavelength search for counterparts in ancillary data, which makes use of radio, microwave, infrared, optical, and X-ray data sets, and which places emphasis on the robustness of the counterpart match. They discuss the physical properties of the new sample and identify a population of low-redshift X-ray under-luminous clusters revealed by SZ selection. These objects appear in optical and SZ surveys with consistent properties for their mass, but they are almost absent from ROSAT X-ray selected samples. Three pipelines were used to detect SZ clusters: two independent implementations of the Matched Multi-Filter (MMF1 and MMF3) and PowellSnakes (PwS). The main catalog contained in this HEASARC table is constructed as the union of the catalogs from the three detection methods. The completeness and reliability of the catalogs have been assessed through internal and external validation as described in section 4 of the reference paper. The HEASARC has changed the names of many of the parameters from those given in the original table. In such cases we have listed the original names in parentheses at the end of the parameter descriptions given below. This table was created by the HEASARC in May 2017 based upon the <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/A+A/594/A27">CDS Catalog J/A+A/594/A27</a> file psz2.dat, the main (union of 3 pipelines) SZ source catalog. The source catalogs from the 3 individual pipelines are available at <a href="http://cdsarc.u-strasbg.fr/ftp/cats/J/A+A/594/A27/">http://cdsarc.u-strasbg.fr/ftp/cats/J/A+A/594/A27/</a> as the files pszmmf1.dat, pszmmf3.dat and pszpws.dat. This is a service provided by NASA HEASARC . 2016A&A...594A..27P https://heasarc.gsfc.nasa.gov/W3Browse/all/plancksz2.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=plancksz2& GET text/xml 180 99999 true 251.9190311 -86.8106899 0.166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=plancksz2 GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_plancksz2&Action=More+Options&Action=Parameter+Search&ConeAdd=1 PLANCK 0.166666666666667 Radio public plancksz2 Planck 2nd Sunyaev-Zeldovich Source Catalog source_number Sequential Identification Number for Each Source in the Catalog meta.id;src short nullable name Source Designation meta.id;meta.main char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable error_radius Position Uncertainty (95%-Confidence Interval) arcmin stat.error;pos double nullable snr Signal-to-Noise Ratio of the Detection stat.snr double nullable redshift Redshift of Cluster src.redshift double nullable redshift_source_name External Identifier of Cluster Associated with Redshift Measurement meta.id.cross char nullable pccs2_match Flag [01] Indicates Whether Detection Matches Any in PCCS2 Catalogs meta.code;src short nullable bii Galactic Latitude degree pos.galactic.lat double nullable spt_name Identifier of SZ Counterpart in the SPT Catalogs, If Present meta.id.cross char nullable y5r500_error Uncertainty on Y5R500 as Determined by Reference Pipeline arcmin^2 stat.error;phys double nullable source_note Comments on This Detection meta.note;src char nullable nn_quality_flag Neural Network Quality Flag meta.code.qual double nullable psz1_match Index of Matching Detection in PSZ1, or -1 If New Detection (PSZ) meta.code;src int nullable ir_contam_flag Flag Denoting Heavy Infrared Contamination meta.code.qual short nullable ami_det_significance Bayesian Evidence for AMI Counterpart Detection stat.likelihood double nullable redmapper_name Identifier of Optical Counterpart in the RedMAPPer Catalog, If Present meta.id.cross;em.opt char nullable mass_sz SZ Mass Proxy 10^14_Solar_Mass phys.mass double nullable act_name Identifier of SZ Counterpart in the ACT Catalogs, If Present meta.id.cross char nullable y5r500 Mean Marginal Y5R500 as Determined by Reference Pipeline arcmin^2 double nullable cosmology_sample_flag Flag [01] Indicates Whether Detection Is in the Cosmology Sample meta.code short nullable ref_pipeline_code Reference Code for the Pipeline from Which Information Is Taken meta.code;meta.software short nullable det_pipeline_codes Pipelines Which Detect This Object meta.code;meta.software short nullable validation_status Code Indicates External Validation Status meta.code short nullable mass_sz_neg_err Lower Bound of 68% SZ Mass Proxy Confidence Interval 10^14_Solar_Mass stat.error;phys.mass double nullable wise_flag Confirmation Flag of WISE Overdensity meta.code short nullable lii Galactic Longitude degree pos.galactic.lon double nullable mcxc_name Identifier of X-Ray Counterpart in the MCXC, If Present (MCXC JHHMM.m+DDMM) meta.id.cross;em.X-ray char nullable mass_sz_pos_err Upper Bound of 68% SZ Mass Proxy Confidence Interval 10^14_Solar_Mass stat.error;phys.mass double nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable