Multiwavelength View of the M87 Black Hole Captured by the Event Horizon
  Telescope
  In 2017, the first image of the center of the M87 galaxy was captured by the
Event Horizon Telescope (EHT). It revealed a ring morphology and a size
consistent with theoretical expectations for the light pattern around a weakly
accreting supermassive black hole of ~6.5 billion solar masses. In parallel to
the EHT measurements, an extensive multi-wavelength (MWL) campaign with ground-
and space-based facilities from radio all the way up to the TeV energy range
was organized. In this note we will give an overview of the results from this
campaign. M87 was found to be in a historically low state. At X-ray energies
the emission from the core dominates over HST-1. We present the most complete
simultaneous, MWL spectrum of the active nucleus to date.
