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J/ApJ/655/790/groups Groups of galaxies in 2MASS survey (Crook+, 2007)
Catalog of Groups in the 2MASS Redshift Survey (Low-density-contrast + High-density-contrast, tables 6 and 7 of paper) (2865 rows)
  Group=1253, n_Group=!=L
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ColumnValue  Explain   (UCD)
_RAJ200023 47 44.100 "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+29 30 54.00 "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)
_RAB195023 45 12.545 "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+29 14 13.85 "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)
_Glon106.697074 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-31.340569 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)
2857recno 2857  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
n_GroupH  L for Low-density-contrast group, or H for High-density-contrast group (meta.id.part;meta.main)

Group1253  Group number (Note 1)   (meta.id;meta.main)
RAJ200023 47 44.1 "h:m:s" (i) Hour of Right Ascension (J2000) (pos.eq.ra;meta.main)
DEJ2000+29 30 54 "d:m:s" (i) Degree of Declination (J2000) (pos.eq.dec;meta.main)
Nm 4  Number of members in Group (Note 2)   (meta.number)
NmS 0  Number of simulated members in Group (meta.number)
Dist 70.65 Mpc Mean (corrected) group distance, assuming h=0.73 (pos.distance;pos.heliocentric)
HV 5196 km/s Mean heliocentric group velocity (spect.dopplerVeloc;stat.mean)
sigma 98.3 km/s Line-of-sight velocity dispersion (phys.veloc.dispersion)
Rp 0.36 Mpc Projected virial radius (phys.size.radius)
logM12.586 [solMass] Log of the virial mass (phys.mass)
logMp12.989 [solMass] Log of the projected mass (phys.mass)
logM/L 1.186 [solMass/solLum]Log of projected mass-to-light ratio (phys.luminosity)
a 35 arcmin Semi-major axis of the ellipse fit (Note 3)   (phys.angSize.smajAxis;meta.modelled)
b/a    Axis ratio of group ellipse fit (phys.angSize;arith.ratio)
PA  deg Semi-major axis position angle (Note 4)   (phys.angSize.smajAxis)
LDC1597   LDC catalog group number that includes all members of this group (for table7.dat only) (meta.id)
  
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