First Sagittarius A* Event Horizon Telescope Results. III. Imaging of the Galactic Center
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Abstract We present Event Horizon Telescope (EHT) 1.3 mm measurements of the radio
source located at the position of the supermassive black hole Sagittarius A*(Sgr A*) …

General relativity has been widely tested in weak gravitational fields but still stands largely
untested in the strong-field regime. According to the no-hair theorem, black holes in general …

The compact and, with ∼ 4.3 ± 0.3 * 10^ 6∼ 4.3±0.3× 10 6 M _ ⊙⊙, very massive object
located at the center of the Milky Way is currently the very best candidate for a supermassive …

First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole
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When surrounded by a transparent emission region, black holes are expected to reveal a
dark shadow caused by gravitational light bending and photon capture at the event horizon …

First M87 Event Horizon Telescope Results. III. Data Processing and Calibration - IOPscience
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We present Event Horizon Telescope (EHT) 1.3 mm measurements of the radio source
located at the position of the supermassive black hole Sagittarius A*(Sgr A*), collected …

We present the calibration and reduction of Event Horizon Telescope (EHT) 1.3 mm radio
wavelength observations of the supermassive black hole candidate at the center of the radio …

Interferometric imaging now achieves angular resolutions as fine as∼ 10 μas, probing
scales that are inaccessible to single telescopes. Traditional synthesis imaging methods …