arXiv:1405.3227 [astro-ph.HE]AbstractReferencesReviewsResources Classifications Subjects Themes Keywords active galactic nuclei, photon-alp mixing, photon-axion mixing, high energy gamma-ray observations, softer inferred intrinsic agn spectra Tags journal article Journal Information Publisher Journal Year Month Volume Number Pages DOI URL Miscellaneous Typesetting Pages Language License Submit Reset