ACTSZCLUST ivo://nasa.heasarc/actszclust NASA/GSFC HEASARC Hilton et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source The catalog of 4195 optically confirmed Sunyaev-Zel'dovich (SZ) selected galaxy clusters were detected with signal-to-noise > 4 in 13,211 deg<sup>2</sup> of sky surveyed by the Atacama Cosmology Telescope (ACT). Cluster candidates were selected by applying a multi-frequency matched filter to 98- and 150-GHz maps constructed from ACT observations obtained from 2008-2018 and confirmed using deep, wide-area optical surveys. The clusters span the redshift range 0.04 < z < 1.91 (median z = 0.52). The catalog contains 222 z > 1 clusters, and a total of 868 systems are new discoveries. Assuming an SZ-signal vs. mass scaling relation calibrated from X-ray observations, the sample has a 90% completeness mass limit of M<sub>500c</sub> > 3.8 x 10<sup>14</sup>M<sub>sol</sub>, evaluated at z=0.5, for clusters detected at signal-to-noise ratio > 5 in maps filtered at an angular scale of 2.40. The survey has a large overlap with deep optical weak-lensing surveys that are being used to calibrate the SZ-signal mass-scaling relation, such as the Dark Energy Survey (4566 deg<sup>2</sup>), the Hyper Suprime-Cam Subaru Strategic Program (469 deg<sup>2</sup>), and the Kilo Degree Survey (825 deg<sup>2</sup>). This HEASARC database table was ingested in February 2021. It contains the ACT DR5 SZ cluster catalog obtained from the LAMDBA website (<a href="https://lambda.gsfc.nasa.gov/product/act/actpol_dr5_szcluster_catalog_info.cfm#catalog">https://lambda.gsfc.nasa.gov/product/act/actpol_dr5_szcluster_catalog_info.cfm#catalog</a>). This is a service provided by NASA HEASARC . 2020arXiv200911043H https://heasarc.gsfc.nasa.gov/W3Browse/all/actszclust.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=actszclust& GET text/xml 180 99999 true 338.138092876733 -59.9870483169773 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=actszclust GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_actszclust&Action=More+Options&Action=Parameter+Search&ConeAdd=1 GROUND-BASED 0.0166666666666667 Radio public actszclust Atacama Cosmology Telescope DR5 Sunyaev-Zeldovich Cluster Catalo 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 snr Signal-to-Noise Ratio, Optimized Over All Filter Scales stat.snr double nullable y_c Central Comptonization Parameter That Maximizes SNR double nullable y_c_error Error in Central Comptonization Parameter That Maximizes SNR stat.error;phys double nullable redshift Adopted Redshift for the Cluster src.redshift double nullable redshift_error Error in Adopted Redshift for the Cluster stat.error;src.redshift double nullable mass_500c Mass 500c Using the UPP and Arnaud Scaling Relation 10^14_Solar_Mass phys.mass double nullable mass_500c_pos_err Upper Error in Mass 500c 10^14_Solar_Mass stat.error;phys.mass double nullable mass_500c_neg_err Lower Error in Mass 500c 10^14_Solar_Mass stat.error;phys.mass double nullable mass_200m Mass 200 with Respect to the Mean Density, Converted Using c-M Relation 10^14_Solar_Mass phys.mass double nullable mass_200m_pos_err Upper Error in Mass 200m 10^14_Solar_Mass stat.error;phys.mass double nullable mass_200m_neg_err Lower Error in Mass 200m 10^14_Solar_Mass stat.error;phys.mass double nullable ref_known_lens Reference Code(s) for Known Strong Gravitational Lenses meta.note char nullable camira_n_mem Optical Richness Measurement for the CAMIRA Algorithm in HSCSSP S19A Footprint src.density;meta.modelled double nullable rm_desy3_lambda_error Error in Optical Richness Measurement for the redMaPPer Algorithm in DES Y3 stat.error;meta.modelled double nullable mass_500c_cal Mass 500c Rescaled Using the Richness-Based Weak-Lensing Mass Calibration Factor 10^14_Solar_Mass phys.mass double nullable mass_200m_uncorr_neg_err Lower Error in Mass 200m Uncorrected for Bias 10^14_Solar_Mass stat.error;phys.mass double nullable matched_template Name of the Matched Filter Template Resulting in the Highest SNR Detection meta.code char nullable desy3_flag Flag [TF] Indicates the Cluster Falls Within the DES Y3 Footprint meta.code.member char nullable notes Notes Regarding Cluster (e.g., AGN, Lensing, Merger, Star Formation) meta.note char nullable mass_500c_uncorr_pos_err Upper Error in Mass 500c Uncorrected for Bias 10^14_Solar_Mass stat.error;phys.mass double nullable ref_optical Reference Code for Source of Alternative Optically-Determined Cluster Position meta.ref;pos;em.opt char nullable bii Galactic Latitude degree pos.galactic.lat double nullable warning_message Warning Message Related to the Redshift Measurement for This Cluster meta.note char nullable known_lens Name(s) of Known Strong Gravitational Lenses Within 2 Mpc Projected Distance meta.note char nullable rm_desy3_flag Flag Indicates Cross-Match with a redMaPPer-Detected Cluster in DES Y3 Footprint meta.code char nullable rm_sdss_lambda_error Error in Optical Richness Measurement for the redMaPPer Algorithm in SDSS stat.error;meta.modelled double nullable optical_ra Alternative Optically-Determined Right Ascension pos.eq.ra;em.opt double nullable act_tile_name Name of the ACT Map Tile in Which the Cluster Was Found meta.id;obs.image char nullable rm_sdss_flag Flag Indicates Cross-Match with a redMaPPer-Detected Cluster in SDSS Footprint meta.code char nullable kidsdr4_flag Flag [TF] Indicates the Cluster Falls Within the KiDS DR4 Footprint meta.code.member char nullable rm_desy3_lambda Optical Richness Measurement for the redMaPPer Algorithm in the DES Y3 Footprint src.density;meta.modelled double nullable lii Galactic Longitude degree pos.galactic.lon double nullable rm_sdss_lambda Optical Richness Measurement for the redMaPPer Algorithm in the SDSS Footprint src.density;meta.modelled double nullable mass_200m_uncorr Mass 200m Uncorrected for Bias 10^14_Solar_Mass phys.mass double nullable mass_500c_cal_neg_err Lower Error in Mass 500c Rescaled Using Mass Calibration Factor 10^14_Solar_Mass stat.error;phys.mass double nullable y_c_fixed_error Error in Central Comptonization Parameter Measured at the Reference Filter Scale stat.error;phys double nullable camira_flag Flag Indicates Cross-Match with CAMIRA-Detected Cluster in HSCSSP S19A Footprint meta.code char nullable mass_500c_uncorr Mass 500c Uncorrected for Bias 10^14_Solar_Mass phys.mass double nullable zcluster_delta Density Contrast Statistic Measured at the Cluster Photometric Redshift src.density double nullable mass_500c_uncorr_neg_err Lower Error in Mass 500c Uncorrected for Bias 10^14_Solar_Mass stat.error;phys.mass double nullable hscs19a_flag Flag [TF] Indicates the Cluster Falls Within the HSC-SSP S19A Footprint meta.code.member char nullable ref_redshift Reference Source of the Adopted Redshift meta.ref;src.redshift char nullable redshift_type Value Indicates Type of Redshift (spec = Spectroscopic, phot = Photometric) meta.code;src.redshift char nullable snr_fixed Signal-to-Noise Ratio at the Reference Filter Scale stat.snr double nullable optical_dec Alternative Optically-Determined Declination pos.eq.dec;em.opt double nullable zcluster_delta_error Error in Density Contrast Statistic Measured at the Cluster Photometric Redshift stat.error;src.density double nullable mass_200m_uncorr_pos_err Upper Error in Mass 200m Uncorrected for Bias 10^14_Solar_Mass stat.error;phys.mass double nullable y_c_fixed Central Comptonization Parameter Measured at the Reference Filter Scale double nullable zcluster_source Photometry Used for zCluster Measurements: DECaLS (DR8), KiDS (DR4), SDSS (DR12) meta.code char nullable mass_500c_cal_pos_err Upper Error in Mass 500c Rescaled Using Mass Calibration Factor 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