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J/ApJS/167/1/table3 Galaxy groups and clusters from SDSS (Berlind+, 2006)
Group and Cluster Catalogs for Samples Mr20, Mr19, and Mr18 (8148 rows)
  recno=5550
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ColumnValue  Explain   (UCD)
_RAJ200001 50 11.00567 "h:m:s" Right ascension (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEJ2000+13 10 29.6220 "d:m:s" Declination (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_RAB195001 47 30.16388 "h:m:s" Right ascension (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEB1950+12 55 38.5254 "d:m:s" Declination (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_Glon144.25717939 deg Galactic longitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lon)
_Glat-47.24983338 deg Galactic latitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lat)
5550recno 5550  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

SampMr19  The volume-limited sample (Note G1)   (src.sample)
Group 1210  (i) Group identification number (linked to galaxies of this group ) (Note 1)   (meta.id;meta.main)
RAJ2000027.545857 deg (i) Right Ascension (J2000) of group centroid (pos.eq.ra;meta.main)
DEJ2000+13.174895 deg (i) Declination (J2000) of group centroid (pos.eq.dec;meta.main)
z 0.01671  Mean redshift of the group (src.redshift)
Rich 4  Group richness (src.class.richness)
rMAG-21.623 mag Total group r band absolute magnitude (phys.magAbs)
g-r 0.943 mag Total group (g-r) color index (phot.color;em.opt.B;em.opt.R)
sigma 136.9 km/s Group velocity dispersion (phys.veloc.dispersion)
RPerp 0.245 Mpc Group projected rms radius (in h–1Mpc) (stat.stdev;phys.size.radius;pos.lg)
Redge 26.2 Mpc Perpendicular distance of group center from survey edge (in h–1Mpc) (pos.distance)
  
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