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- active galactic nuclei2
- astro-ph.co2
- astronomical and space sciences2
- astronomical observations2
- astrophysics - astrophysics of galaxies6
- astrophysics - cosmology and extragalactic astrophysics3
- astrophysics - cosmology and nongalactic astrophysics54
- astrophysics::cosmology and extragalactic astrophysics2
- baryons2