Zwicky ivo://nasa.heasarc/zwclusters NASA/GSFC HEASARC Zwicky, Herzog, Wild 2026-05-08 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Cluster of Galaxies The ZWCLUSTERS database is based upon the Catalogue of Zwicky Clusters of Galaxies. The Zwicky clusters were identified by F. Zwicky in 560 POSS fields. They are rich clusters, each having at least 50 members within 3 magnitudes of the brightest member. This is a service provided by NASA HEASARC . 1961CGCG..C......0Z https://heasarc.gsfc.nasa.gov/W3Browse/all/zwclusters.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=zwclusters& GET text/xml 180 99999 true 72.944 -4.534 0.25 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=zwclusters GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_zwclusters&Action=More+Options&Action=Parameter+Search&ConeAdd=1 GALAXY CATALOG 0.25 Optical public zwclusters Zwicky Clusters name Object Designation meta.id;meta.main char nullable ra Right Ascension, J2000 degree pos.eq.ra;meta.main double nullable dec Declination, J2000 degree pos.eq.dec;meta.main double nullable cluster_pop Population of Cluster short nullable cluster_area Cluster Area degree^2 float nullable dist_group Distance Group short 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 mean_pop Mean Apparent Population short nullable diameter Diameter of Cluster cm float nullable class Browse Object Classification src.class short nullable lamb_distance Lambert Distance (RL) float nullable ra_1950 Right Ascension in 1950 Coordinates degree double nullable cluster_type Cluster Type char nullable bii Galactic Latitude degree pos.galactic.lat double nullable lamb_y Y Lambert Coordinate (YL) float nullable dec_1950 Declination in 1950 Coordinates degree double nullable lii Galactic Longitude degree pos.galactic.lon double nullable cluster_radius Cluster Radius degree float nullable sglat Super-Galactic Latitude degree double nullable cra Right Ascension, Sexagesimal, J2000 char nullable lamb_x X Lambert Coordinate (XL) float nullable sglon Super-Galactic Longitude degree double nullable cdec Declination, Sexagesimal, J2000 char nullable