Table 3: Lower limit magnitude of detectability of a putative lensing galaxy according to its position (Cols. 2, 3 and 4). Column 5 displays the minimal redshift for an $\mathcal{L}^*$ galaxy of this magnitude.
Position R J Ks  
(a) 0.8 $^{\prime \prime }$  East to A 25.5 24.0 22.5 z>1.9
(b) 0.4 $^{\prime \prime }$  West to B 26.5 24.5 24.5 z>3.2
(c) 7.0 $^{\prime \prime }$  South-West to A 27.0 24.5 24.5 z>4.5


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