Table 2: Relative astrometry, flux ratio (with respect to image A) and absolute photometry in filters F555W, F814W and F160W of the lensed QSO images A, B, C, D, as derived from PSF fitting (see Sect. 4.2). After the Einstein ring has been subtracted, relative astrometry and absolute photometry are derived for the lensing galaxy G from the best fit of the Sérsic model (see Sect. 4.3). After subtracting the lens, the astrometry of component X is derived from a Gaussian fitting and its magnitude from aperture photometry (corrected for infinite aperture). Theoretical magnification ratios  $M_{\rm A}/M_{i}$ and the (unobserved) AGN position are derived from our fiducial lens model (see Sect. 4.4). Magnitudes of the host are calculated in Sect. 4.5. Quoted errors are standard errors on the mean, computed from the results on the NExp individual frames, including the systematics estimated in Sects. 2.2 and 2.3. Boldface indicates the final, weighed average astrometry derived from all bands.
Object Filter $\Delta\alpha \cos \delta$ $\Delta \delta$ $I_{\rm A}/I_i$ m $M_{\rm A}/M_{i}$
Image A F555W $0.000 \pm 0.000$ $0.000 \pm 0.000$ $1.000 \pm 0.000$ $17.74\pm0.02$ 1.00
  F814W $0.000 \pm 0.000$ $0.000 \pm 0.000$ $1.000 \pm 0.000$ $ 17.43\pm0.02$ 1.00
  F160W $0.000 \pm 0.000$ $0.000 \pm 0.000$ $1.000 \pm 0.000$ $15.76\pm 0.04$ 1.00
B F555W $+0.035 \pm 0.003$ $+1.192 \pm 0.004$ $1.105 \pm0.020$ $17.85\pm0.02$ 1.74
  F814W $+0.029 \pm 0.005$ $+1.186\pm 0.004$ $1.085\pm0.018$ $17.52\pm 0.04 $ 1.74
  F160W $+0.030 \pm 0.004$ $+1.187\pm 0.004$ $1.30\pm 0.030$ $16.05\pm 0.03$ 1.74
  Mean $+0.032 \pm 0.002$ $+1.188 \pm 0.002$ - - 1.74
C F555W $-0.584 \pm 0.004$ $ -1.115\pm 0.004$ $2.941\pm 0.044$ $18.91\pm 0.02$ 2.10
  F814W $-0.591 \pm 0.005$ $-1.123\pm 0.004$ $2.764\pm0.086$ $18.50\pm0.02 $ 2.10
  F160W $-0.595 \pm 0.005$ $-1.122\pm 0.005$ $2.62\pm 0.06$ $16.80\pm0.04$ 2.10
  Mean $-0.590 \pm 0.003$ $-1.120 \pm 0.003$ - - 2.10
D F555W $-3.110 \pm 0.003 $ $ +0.885\pm 0.003$ $10.500 \pm0.248$ $20.27\pm 0.05$ 20.4
  F814W $-3.117 \pm 0.006$ $+0.879\pm 0.004$ $10.655\pm 0.348 $ $20.00\pm 0.04$ 20.4
  F160W $-3.123 \pm 0.009$ $+0.896\pm 0.009$ $11.12\pm 0.52$ $18.37\pm0.06$ 20.4
  Mean $-3.112 \pm 0.003$ $+0.884 \pm 0.002$ - - 20.4
Lens G F555W $-2.014 \pm 0.003$ $+0.612\pm 0.003$ - $19.58\pm0.12$ -
  F814W $-2.029 \pm 0.011$ $+0.607\pm 0.005$ - $17.61\pm0.06$ -
  F160W $-2.019\pm0.004$ $+0.606\pm0.005$ - $15.75\pm0.08$ -
  Mean $-2.016 \pm 0.002$ $+0.610 \pm 0.002$ - - -
X F555W $-1.931\pm 0.011$ $+1.145\pm 0.008$ - $25.30\pm 0.30$ -
  F814W $-1.930\pm 0.005$ $+1.140\pm 0.007$ - $23.29\pm0.06$ -
  F160W $-1.930\pm 0.005$ $+1.137\pm 0.005$ - $21.15\pm0.06$ -
  Mean $-1.930 \pm 0.003$ $+1.139 \pm 0.004$ - - -
Host H F555W - - - $21.53\pm0.63$ -
  F814W - - - $19.49\pm0.15$ -
  F160W - - - $17.27\pm0.03$ -
AGN Mean $-1.501 \pm 0.02$ $+0.427 \pm 0.02$ - - -

Source LaTeX | All tables | In the text