fields containing extracted from the combined “$R$” images. The figures reveal the expected configuration of 4 point-like images of the core, A1, A2, B and C, as well as the lens galaxy G (Figure 1 labels these components). In addition, our data reveal an arc that we interpret (see §3) as lensed emission from the vicinity of the QSO. We detected a group of objects within $\sim 1''$ of one another, $\sim 4''$ to the SW of the lens system. Each of the objects in this group is faint and extended (see Figure 2). Hence, we assume it is a compact group of galaxies. Among the other objects in Figure 2 are 3 stars and other faint galaxies.

Astrometry and Photometry
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The components of  are easily discerned in Figures 2 and 4. Figures 1 and 3 show close-up views of the $R$ and $I$ images, respectively. The apparent “fuzz” surrounding the images of the core in the latter figure is the low-level structure of the PC1 point-spread function (PSF). Although the images of the core are separated by only $\sim 2''$, the lensing galaxy was detected by Schechter & Moore (SM93), under excellent observing conditions (FWHM=$0\farcs80$), and then confirmed 