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Fig. 11
RC iv-L diagram combining reverberation mapping measurement of RC iv (“ × ” symbol, Peterson et al. 2005; Kaspi et al. 2007) and our microlensing-based size for QSO 2237 + 0305. The solid line is the analytical fit to the reverberation mapping data from Kaspi et al. (2007), which has a slope α = 0.52.
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