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Fig. 22

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Spectral energy distributions of 4C 38.41 from the radio to the γ-ray frequencies. Different colours correspond to different epochs, whose JD − 2   450   000 is indicated in the lower inset together with the γ and X-ray spectral indices. The near-IR to UV spectral band is enlarged in the upper inset. Filled (empty) circles display ground (space) data. Radio to optical ground data were collected in the framework of the GASP and collaborators; space optical, UV, and X-ray data are from Swift, γ-ray data from Fermi.

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