Table 4: The best-fit parameters for the four-image models.
Model $\theta_{\rm E}$ x1l x2l $e/\gamma$a $\theta_{{\rm e}/\gamma}$a $\chi ^{2}$ d.o.f.c
  ( $^{\prime \prime }$) ( $^{\prime \prime }$) ( $^{\prime \prime }$)   ($^\circ$)    
SIEb 1.91     0.486 28.3 14.3 3
SIE 2.55 0.15 -0.17 0.699 28.1 1.77 1
SIS+ESb 1.22     0.198 29.1 6.70 3
SIS+ES 1.23 0.06 0.05 0.185 28.6 1.00 1
a Ellipticity or external shear values, depending on the model.
b The lens center is fixed to the galaxy center.
c Number of degrees of freedom.

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