GRoups can be found here:

http://cosmo.nyu.edu/~tinker/GROUP_FINDER/PCA_CATALOGS

where the files have names like clf_groups_MXX.X.[groups/prob/galdata_corr]

where MXX.X is the stellar mass limit at the redshift defined by the
magnitude limit (ie, 9.7, 10.1, 10.5 correspond roughly to -17.5 -18.3
-19.0 in r-band). The exact details of the cuts are:

#     rlim       mlim       zcut       ngal       ngalx
#
-17.477 9.700 0.033363      16975      17302
-18.322 10.100 0.047320      30144      30312
-19.039 10.500 0.065454      41659      41707

(you should ignore ngalx)

These catalogs are based on the PCA stellar masses of Chen et al 2012,
in contrast to the Wetzel et al analyses which use kcorrect stellar
masses. These masses have h=0.7 (but all other units assume h=1).

The format of the files is totally kludgy-- I didn't really think
about having other people use them when I was first testing the code,
and when I got something that worked I didn't want to touch
it. Anyway,

*.groups is the group catalog itself; properties of each group. The
 format


1) foo
2) group id
3) gal id (for the central)
4) group mass 
5) group mass in the previous iteration of the finder (should be same). not relevant for you.
6) number of satellites
7) total group stellar mass
8) stellar mass of central
9) foo
10) ra (radians) of central 
11) dec of central
12) cz of central (km/s)
13) foo
14) foo

*.prob is the galaxy catalog with probability of being a satellite
 (official stats assume >0.5 is a satellite).


1) foo
2) gal id
3) group id
4) id of central galaxy
5) r-band magnitude h=1
6) P_sat (>0.5 means a satellite)
7) halo mass [Msol/h]
8) foo
9) foo
10) foo
11) projected separation of gal from central, in units of Rhalo
12) projected separation of gal in units of radians
13) angular radius of halo

*.galdata_corr are galaxy properties. This file is in the same order
 as the *.prob file

1) foo
2) gal id
3) M_r
4) M_g
5) cz [km/s]
6) Dn4000  (from MPA/JHU catalog)
7) H_delta EW (same source)
8) log sSFR (1/yr same source, but uses kcorrect stellar mass for "s")
9) stellar mass (Msol/h^2, from kcorrect)
10) ra
11) dec
12) velocity dispersion (from VAGC)
13) signal to noise of spectrum (from VAGC)
14) sersic index (from VAGC) 

Extra columns (if they exist)
15) concentration
16) K+A flag (1/0)
17) R_exp [kpc?]
18) surface density (Msol/kpc^2) at 1 kcp
19) surface density (Msol/kpc^2) at R_e
20) surface density (Msol/kpc^2) at R_e/2
21) error in velocity dispersion
22) Bulge-to-Total light ratio r-band (Simard et al)
23) B/T error
24) GM(<R_e)/R_e [km/s]
25) R_e [Mpc]

Unless I have said so, all units are h=1.