List of Tables
Time delays, with 1- errors, from the literature. In some cases multiple delays have been measured in 4-image lens systems, and in this case each delay is given separately for the two components in brackets. An additional time delay for CLASS B1422+231  probably requires verification, and a published time delay for Q0142–100 [120, 146] has large errors. Time delays for the CLASS and PKS objects have been obtained using radio interferometers, and the remainder using optical telescopes.
Some recent measurements of using the S-Z effect. Model types are for the assumption of a -model and H for a hydrostatic equilibrium model. Some of the studies target the same clusters, with three objects being common to more than one of the four smaller studies, The larger study  contains four of the objects from  and two from .