Fermi Large Area Telescope observations of the active galaxy 4C+55.17: Steady, hard gamma-ray emission and its implications

McConville W.; Ostorero L.; Moderski R.; Stawarz L.; Cheung C.C.; Ajello M.; Bouvier A.; Bregeon J.; Donato D.; Finke J.; Furniss A.; McEnery J.E.; Monzani M.E.; Orienti M.; Reyes L.C.; Rossetti A.; Williams D.A.