... reconstruction

Based on observations made with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. Present observations were made under HST-GO-9744 (P.I. C.S. Kochanek).

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...1,

Directeur de Recherches honoraire du FNRS (Belgium).

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... images

Observed flux ratios must be corrected for differential extinction, delayed intrinsic variability and/or microlensing before being used to constrain a lens model.

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... information

Saha & Williams (2001) have shown that the global shape of the Einstein ring is encoded into the point-like image time delay ratios.

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... a bulge

And the black hole mass correlates with the bulge luminosity, not with the total host luminosity (e.g. Magorrian et al. 1998).

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... zero)

Strictly speaking, the $\chi^2$ estimator cannot be applied since the computed pixel values are not independent from the observed ones. However, the obtained values for the $\chi^2$ being not acceptable from a pure statistical point of view, a more appropriate statistical test is not critical.

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... ACS/WFC zeropoints

STScI Web site: http://www.stsci.edu/hst/acs/analysis/zeropoints

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