Fig. 7.
Scheme of the caustic crossing of the compact jet-like region (left) that emits a small contribution to the blue wing of the C IVλ1550 line of QSO J1004+4112 (right). The dimension scale on the left panel is given in arbitrary units, where the disk-like BLR is assumed to be several tens of light days (see text) and the jet-like region is assumed to more compact (< 9 light days) to be microlensed.
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