Fig. 5.
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Spectral index of PKS 1222+216 in the quiescent state. The black points represent the quiescent-state flux densities at 22, 43, and 86 GHz, with error bars indicating flux uncertainties. The orange slope corresponds to the quiescent spectral index between 22 and 43 GHz (αKQ = −0.81), while the green slope represents the quiescent spectral index between 43 and 86 GHz (αQW = −0.628).
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