The SED of 4C38.41 (J1635+3808, top left), NRAO512 (J1640+3946, top right), 3C345 (J1642+3948, middle left), Mkn501 (J1653+3945, middle right), ARP102B (J1719+4858, bottom left), and 1ES1741+196 (J1743+1935, bottom right). Simultaneous data are shown in red; quasi-simultaneous data, i.e. Fermi data integrated over 2 months, Planck ERCSC and non-simultaneous ground based observations are shown in green; Fermi data integrated over 27 months are shown in blue; literature or archival data are shown in light gray.
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