Radio Monitoring Campaigns of Six Strongly Lensed Quasars
  We observed six strongly lensed, radio-loud quasars (MG 0414+0534, CLASS
B0712+472, JVAS B1030+074, CLASS B1127+385, CLASS B1152+199, and JVAS
B1938+666) in order to identify systems suitable for measuring cosmological
parameters using time delays between their multiple images. These systems are
in standard two and four image configurations, with B1938 having a faint
secondary pair of images. Two separate monitoring campaigns were carried out
using the VLA and upgraded JVLA. Lightcurves were extracted for each individual
lensed image and analyzed for signs of intrinsic variability. While it was not
possible to measure time delays from these data, $\chi^2$-based and structure
function tests found evidence for variability in a majority of the lightcurves.
B0712 and B1030 had particularly strong variations, exhibiting linear flux
trends. These results show that most of these systems should be targeted with
followup monitoring campaigns, especially B0712 and B1030.
