Fermi-LAT data for nine z≥3 FSRQs show no significant internal BLR absorption except a 1.7σ hint in 4FGL J0733.8+0455, whose gamma-ray emission region is constrained to d/R_BLR≥0.93.
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Searching for Internal Absorption Signatures in High-Redshift Blazars
Fermi-LAT data for nine z≥3 FSRQs show no significant internal BLR absorption except a 1.7σ hint in 4FGL J0733.8+0455, whose gamma-ray emission region is constrained to d/R_BLR≥0.93.