Cluster Mass-to-Light Ratios from Weak Lensing

Ours:

Cluster Z M/L reference
A1689 0.18 400h +/- 40 Kaiser et al 1996
A1146 0.14 200h +/- 50 Kaiser et al 1996
A2218 0.18 440h +/- 80 Squires et al 1996a
ms1224 0.35 800h +/- 200 Fahlman et al 1994
A2390 0.23 320h +/- 90 Squires et al 1996b
A2163 0.18 300h +/- 100 Squires et al 1996c
ms1054 0.83 > 360h Luppino and Kaiser 1996

Others:

Cluster Z M/L reference
1455+22 0.26 460h Smail etal 1994
cl0016+16 0.55 430h Smail etal 1994
cl0024+17 0.38 430h Bonnet etal 1994
cl0939 0.41 200h Seitz etal 1996
A1689 0.18 450h +/- 50 Tyson and Fisher 1995

Biggest discrepancy with virial mass