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Galaxies: active (3) |
Galaxies: Seyfert (3) |
BL lacertae objects: general (1) |
Galaxies: jets (1) |
Galaxies: nuclei (1) |
Techniques: imaging spectroscopy (1) |
Techniques: photometric (1) |
X-rays: galaxies (1) |
Now showing items 1-8 of 3