Fig. 4
R-band light curves of the quasars images A and B in SDSS J1001+5027 from March 2005 to July 2011. The 1σ photometric error bars are also shown. For display purpose, the curve of quasar image B is shown shifted in time by the measured time delay (see text). The light curves are available in tabular form from the CDS and the COSMOGRAIL website.
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