AAVSO light curves for IK Tau, RT Vir and W Hya, with the epochs of observation using MERLIN and Pushchino superimposed in red and blue, respectively. The optical data for these stars is sparse as they are Zodaical and/or heavily obscured and tentative, sinusoidal, variability curves are overlaid in green. We took the stellar periods from GCVS (Samus et al. 2011) and also the origin and amplitude for RT Vir and W Hya, adjusted by eye in the latter case to fit the current data. The origin and amplitude for IK Tau were taken from Matsumoto et al. (2008).