Fig. 2.
Relation between intensity ratios Al IIIλ1860/Si III
1892 and C III]
1909/Si III]
1892. Black, blue, green and red diamonds correspond to normal, BAL, mini–BAL and Radio–Loud quasars respectively for the present GTC-xA sample. Gray and cyan dots correspond to the FOS-A and FOS-xA sample respectively. Gray triangles correspond to S14-A sample. Yellow star marks the position of I Zw 1. Gray area represents the parameter space occupied by xA sources.
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