galaxies: active
BL Lacertae objects: individual: PKS 2155-304
galaxies: jets
gamma-rays: theory
radiation mechanisms: nonthermal
[PHYS.ASTR.CO] Physics/Astrophysics/Cosmology and Extra-Galactic Astrophysics
[PHYS.HTHE] Physics/High Energy Physics - Theory
[SDU.ASTR] Sciences of the Universe/Astrophysics