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Explores the classification and statistics of AGN, black holes, unified AGN model, variability, megamasers, orbital motion measurement, and time-delay cosmography.
Explores the importance of the perfect fluid in cosmology and its coupling to gravity, leading to a discussion on the Einstein universe and static gravity.
Explores multimessenger astrophysics, focusing on cosmic rays, neutrinos, and gamma rays, and discusses the detection of neutrinos from a BL Lac object.