First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
This is the first paper in the Event Horizon Telescope (EHT) series presenting the first image of a supermassive black hole, located at the center of the galaxy M87. Using global very long baseline interferometry at 1.3 mm, the collaboration resolved a bright ring of emission surrounding a central dark region, the black hole shadow. The observations are consistent with a Kerr black hole of mass about 6.5 billion solar masses.