J/A+AS/100/47 J/A+AS/100/47 General study of group membership. II. A M Garcia Astron. Astrophys. Suppl. Ser. 100 47 1993 1993A&AS..100...47G catalogs galaxies: clusters: general methods: numerical We present a whole sky catalog of nearby groups of galaxies taken from the Lyon-Meudon Extragalactic Database. From the 78,000 objects in the database, we extracted a sample of 6392 galaxies, complete up to the limiting apparent magnitude B0 = 14.0. Moreover, in order to consider solely the galaxies of the local universe, all the selected galaxies have a known recession velocity smaller than 5500 km/s. Two methods were used in group construction: a Huchra-Geller (1982) derived percolation method and a Tully (1980) derived hierarchical method. Each method gave us one catalog. These were then compared and synthesized to obtain a single catalog containing the most reliable groups. There are 485 groups of a least three members in the final catalog.

LGG Group number in the Lyon Group of Galaxies (LGG) catalog --- PGC Identification with the PGC name (according to Paturel et al. 1989a,b) number=1 Paturel et al. 1989a, A&AS 80, 299 Paturel et al. 1989b, Extragalactic Data Base Monographs 1, Vol. 1, 2, 3 (PGC) --- Other Identification with an alternative name --- RAh Right ascension 1950 h RAm Right ascension 1950 min RAs Right ascension 1950 s DE- Declination sign --- DEd Declination 1950 d DEm Declination 1950 arcmin DEs Declination 1950 arcsec T Morphological type coded according to RC3, when it is known number=2 de Vaucouleurs et al. 1991, Third Reference Catalogue of Bright Galaxies (New York: Spinger Verlag) Vol. I, II, III (RC3) --- v Mean heliocentric radial velocity km/s N (3) --- Patricia Bauer CDS 1993Nov17 J_A+AS_100_47.xml