Shk.(Gal.) ivo://nasa.heasarc/shkgalaxy NASA/GSFC HEASARC Stoll et al. 2026-04-03 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Galaxy The largest survey of compact galaxy groups was published by Shakhbazian et al. (the <a href="https://cdsarc.cds.unistra.fr/ftp/cats/VII/89">CDS catalog VII/89</a>, implemented by the HEASARC as the SHK database table). This present catalog provides accurate positions of the individual galaxies in the groups; photometric properties of the Southern sky (delta not greater than +2.5 degrees) are evaluated on the basis of the COSMOS/UKST catalog of the Southern sky. This catalog contains 373 groups; this number differs from the number in Shakhbazian's list (377 groups) by the following: (i) there are no data for groups 001 (already published by other authors), 206 and 241 (could not be re-identified), 252 (this is identical with 214), 301 and 353 (could not be re-identified); (ii) Group 328 was published twice (in North and South); and (iii) Group 340 was divided in two parts (340 and 340a), according to Bettoni and Fasano ([BF95]=1995AJ....109...32B). This HEASARC version of the catalog contains a total of 3435 individual galaxies identified as members of the compact groups, 2574 from the northern part of this survey (taken from the ADS Catalog VII/196 file north.dat), and 861 from the southern part of this survey (extracted from the 10746 entries in the ADS Catalog VII/196 file south.dat by including only entries corresponding to bona fide group members). This database table was created by the HEASARC in June, 2000, based on the <a href="https://cdsarc.cds.unistra.fr/ftp/cats/VII/196">CDS Catalog VII/196</a> (files north.dat and south.dat). This is a service provided by NASA HEASARC . 1998yCat.7196....0S https://heasarc.gsfc.nasa.gov/W3Browse/all/shkgalaxy.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=shkgalaxy& GET text/xml 180 99999 true 203.6587 -15.7447 0.0833333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=shkgalaxy GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_shkgalaxy&Action=More+Options&Action=Parameter+Search&ConeAdd=1 GALAXY CATALOG 0.0833333333333333 Optical public shkgalaxy Shakhabazian (Shk) Compact Groups of Galaxies: Individual Galaxi class Browse Object Classification src.class short nullable note Comment or Reference to Note char nullable "__row" System index column char nullable shk Shakhbazian Compact Group Number short nullable rmag R Magnitude phot.mag;em.opt.R float nullable shk_galaxy_flag Multiplicity Index for Galaxy char nullable star_flag Flag S Means Object Probably a Star char nullable redshift Redshift src.redshift double nullable position_source Reference for Quoted Position char nullable bjg_mag Photographic b_j Magnitude if Galaxy float nullable radial_velocity Radial Velocity km/s spect.dopplerVeloc int nullable bjs_mag Photographic b_j Magnitude if Star float nullable ellipticity Ellipticity of Galaxy float nullable lii Galactic Longitude degree pos.galactic.lon double nullable dec Declination degree pos.eq.dec;meta.main double nullable semi_major_axis Semi-major Axis arcmin double nullable "__y_ra_dec" System unit vector column double nullable number_pixels Number of Pixels in Galaxy Image int nullable shk_galaxy Galaxy Number within SHK Group short nullable shk_flag Flag Used to Differentiate SHK 340 char nullable name Designation of the Galaxy meta.id;meta.main char nullable vmag V Magnitude phot.mag;em.opt.V float nullable bii Galactic Latitude degree pos.galactic.lat double nullable cosmos_type Automatic Image Class: S, G, F char nullable position_angle Position Angle degree pos.posAng short nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable "__z_ra_dec" System unit vector column double nullable "__x_ra_dec" System unit vector column double nullable