Optical spectroscopy and imaging of blazars for the Cherenkov Telescope Array Observatory Blazars are the brightest persistent sources in the high-energy and very-high-energy (VHE) gamma-ray sky. Because their UV/optical radiation is often dominated by non-thermal, and, in the case of BL Lacs, featureless continuum radiation, the determination of their redshift...

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Probing the Finely-Resolved 100 TeV Gamma-Ray Sky for Ultra-Heavy Dark Matter - Dark100 abstract TBA