SpARCS J003550-431224 has been spectroscopically confirmed at z = 1.34.
Its mass is estimated to be about 5 x 10^14 solar masses (based on 10 members).
Further details may be found in Wilson et al, 2009
SpARCS J163435+402151 (left) has been spectroscopically confirmed at z = 1.18 (17 members) and has a mass of about 10^14 solar masses.
SpARCS J163852+403843 (right) has been spectroscopically confirmed at z = 1.20 (28 members)
and has a mass of
about 2.5 x 10^14 solar masses. Further details about both clusters may be found in Muzzin et al, 2009.
SpARCS J161315+564930 (left) has been spectroscopically confirmed at z = 0.87 (16 members) and has a mass of about 2 x 10^15 solar masses.
SpARCS J161641+554513 (right) has been spectroscopically confirmed at z = 1.16 (10 members) and has a mass of about 8 x 10^14 solar masses. Further details about both clusters may be found in Demarco et al, 2010.