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Fig. 5

image

From top to bottom: a) total flux density at 14.5 GHz (from the UMRAO database) and at 4.8 GHz (from the UMRAO and the IDV observations); b) flux ratio (fc) of the VLBA core or inner-jet component to total flux density of S4 0917+624; c) angular size of the VLBA core or inner-jet components at 15 GHz; d) size of the broad “core region” fitted with a single Gaussian model; e) rms flux density at 5 GHz versus time; f) IDV modulation index at 5 GHz versus time.

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