WBL ivo://nasa.heasarc/wbl NASA/GSFC HEASARC White et al. 2026-05-08 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Cluster of Galaxies The Catalog of Nearby Poor Clusters of Galaxies of White et al. (1999), also known as the WBL Catalog, is a catalog of 732 optically selected, nearby poor clusters of galaxies covering the entire sky north of -3 degrees declination. The poor clusters, called WBL clusters, were identified as concentrations of three or more galaxies with photographic magnitudes brighter than 15.7, possessing a galaxy surface overdensity of 10^(4/3). These criteria are consistent with those used in the identification of the original Yerkes poor clusters, and this new catalog substantially increases the sample size of such objects. These poor clusters cover the entire range of galaxy associations up to and including Abell clusters, systematically including poor and rich galaxy systems spanning over 3 orders of magnitude in the cluster mass function. As a result, this new catalog contains a greater diversity of richness and structures than other group catalogs, such as the Hickson and Yerkes catalogs. This table contains the entries for the clusters (given in Table 2 of the published catalog) and includes redshift data (where available) and cross-references to other group and cluster catalogs. The WBLGALAXY table (q.v.) contains the entries for the individual galaxies in the clusters which ere given in Table 3 of the published catalog. The WBL table was created by the HEASARC in July 2002 based on &lt;a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/AJ/118/2014"&gt;CDS Catalog J/AJ/118/2014&lt;/a&gt; (the file table2.dat). This is a service provided by NASA HEASARC . 1999AJ....118.2014W https://heasarc.gsfc.nasa.gov/W3Browse/all/wbl.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=wbl& GET text/xml 180 99999 true 177.41480982 -3.5280454 0.0833333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=wbl GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_wbl&Action=More+Options&Action=Parameter+Search&ConeAdd=1 GALAXY CATALOG 0.0833333333333333 Optical public wbl WBL Poor Galaxy Clusters Catalog (White et al. 1999) name WBL Cluster Designation (WBL NNN) 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 richness Richness (Number of CGCG Galaxies in Each Poor Cluster) src.class.richness short nullable redshift Poor-cluster Redshift src.redshift double nullable zwicky_cluster Zwicky Cluster Containing the Given WBL Cluster within Its Contours meta.id.cross char nullable bii Galactic Latitude degree pos.galactic.lat double nullable subclustering Clustering at {sigma}_46_ meta.code char nullable hcg_group HCG (<VII/213>) Cross-Correlation meta.id.cross short nullable cfa_group CfA (<VII/193>) Group Cross-Correlation meta.id.cross short nullable lii Galactic Longitude degree pos.galactic.lon double nullable class Browse Object Classification src.class short nullable yerkes_cluster Yerkes Cluster Cross-Correlation meta.id.cross char nullable note_redshift Notes on Redshift meta.note;src.redshift char nullable abell_cluster Abell Cluster Cross-Correlation meta.id.cross short nullable rad_zwicky_cluster Radius of the Zwicky Cluster arcmin phys.size.radius short nullable wbl_zwicky_offset Distance between Centers of Zwicky & WBL Clusters (units: Zwicky Cluster Radius) pos.angDistance double nullable num_galaxy_redshifts Number of Galaxy Redshifts Available from NED meta.number;obs short nullable medium_distant_flag Flag Indicates Medium-Distant Cluster meta.code char 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