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galaxies: active (6) |
galaxies: individual (m 87) (1) |
galaxies: jets (2) |
galaxies: nuclei (2) |
gamma rays: galaxies (6) |
gamma-ray emission (1) |
gamma-ray outburst (1) |
galaxies: active (6) |
galaxies: individual (m 87) (1) |
galaxies: jets (2) |
galaxies: nuclei (2) |
gamma rays: galaxies (6) |
gamma-ray emission (1) |
gamma-ray outburst (1) |