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Fig. 3
Light curves of SBS0909+523: A is shifted by a time delay Δt = 47 days and a difference in magnitude Δm = −0.6656. The slope parameter α = 6.0587 × 10-5 corresponds to a model of slow linear microlensing. The encircled points are the 63rd and 64th observations that were omitted from later tests.
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