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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=904, n_Group=!=L
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ColumnValue  Explain   (UCD)
_RAJ200015 19 22.000 "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)
_DEJ2000-24 02 22.00 "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)
_RAB195015 16 25.664 "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)
_DEB1950-23 51 30.80 "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)
_Glon341.249588 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+27.614939 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)
2508recno 2508  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)

Group 904  Group number (Note 1)   (meta.id;meta.main)
RAJ200015 19 22.0 "h:m:s" (i) Hour of Right Ascension (J2000) (pos.eq.ra;meta.main)
DEJ2000-24 02 22 "d:m:s" (i) Degree of Declination (J2000) (pos.eq.dec;meta.main)
Nm 6  Number of members in Group (Note 2)   (meta.number)
NmS 0  Number of simulated members in Group (meta.number)
Dist 35.10 Mpc Mean (corrected) group distance, assuming h=0.73 (pos.distance;pos.heliocentric)
HV 2461 km/s Mean heliocentric group velocity (spect.dopplerVeloc;stat.mean)
sigma 246.7 km/s Line-of-sight velocity dispersion (phys.veloc.dispersion)
Rp 0.28 Mpc Projected virial radius (phys.size.radius)
logM13.275 [solMass] Log of the virial mass (phys.mass)
logMp13.609 [solMass] Log of the projected mass (phys.mass)
logM/L 1.998 [solMass/solLum]Log of projected mass-to-light ratio (phys.luminosity)
a 13 arcmin Semi-major axis of the ellipse fit (Note 3)   (phys.angSize.smajAxis;meta.modelled)
b/a 0.91   Axis ratio of group ellipse fit (phys.angSize;arith.ratio)
PA 40 deg Semi-major axis position angle (Note 4)   (phys.angSize.smajAxis)
LDC1117   LDC catalog group number that includes all members of this group (for table7.dat only) (meta.id)
  
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