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Table 21

Contamination of the X-ray emission from a thermal component and ⟨αR−O(Thermal)⟩ estimated for FSRQs in the whole sample and for each sample independently, for various thresholds on the quality of the optical data.

ALL Fermi-LAT Swift-BAT ROSAT/RASS
Opt Data cont/ % αR−O(Thermal) cont/ % αR−O(Thermal) cont/ % αR−O(Thermal) cont/ % αR−O(Thermal)
quality total total total total

ALL 10/47 21  −0.69 ± 0.02 3/25 12  −0.72 ± 0.02 2/21 10  −0.70 ± 0.03 6/13 46  −0.65 ± 0.04
≥ 2 10/44 23  −0.69 ± 0.02 3/22 14  −0.73 ± 0.02 2/20 10  −0.70 ± 0.03 6/13 46  −0.65 ± 0.04
3 9/40 23  −0.69 ± 0.02 3/22 14  −0.73 ± 0.02 1/16 6  −0.69 ± 0.04 6/12 50  −0.64 ± 0.05

Notes. We have considered as contaminated sources all those with X-ray thermal contamination flag ≤ 2 (see the text for a description of the flags).

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