Fig. 10
Simulated light curves for SN Ia and IIP in the H band for the multiply-imaged system 1 at z = 3.04; images 1.1 and 1.2 are magnified 
and 
mag, respectively. The time delay between the images is 
days (Riehm et al. 2011). Also shown are the magnitude limits for the three main survey modes planned for WFIRST (Spergel et al. 2013). Without the magnification from A 1689, the SN IIP would hardly be observable.
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