The Event Horizon Telescope observes M87* and Sagittarius A*

Assembled from 60 blocks · 1 evidence · 24 related

1. Story
2. Over a handful of nights in April 2017 the array observed both targets at 1.3 millimetres, requiring simultaneously usable weather at sites in Chile, Hawaii, Mexico, Arizona, Spain and Antarctica. Petabytes of data were recorded to hard drives and shipped physically to correlators in Massachusetts and Bonn. The South Pole recordings could not be flown out until the austral winter ended, so correlation of the full campaign did not begin until late in the year - one reason the results appeared two years after the observations.
3. Knowledge
4. M87* - the supermassive black hole in Messier 87
5. Sagittarius A* - the black hole at the centre of the Milky Way
6. Very long baseline interferometry
7. Event Horizon Telescope
8. Atacama Large Millimeter/submillimeter Array
9. South Pole Telescope
10. The Event Horizon Telescope observes M87* and Sagittarius A*
11. The first image of a black hole shadow is published
12. Connections
13. Event Horizon Telescope
14. The first image of a black hole shadow is published
15. Event Horizon Telescope
16. Atacama Large Millimeter/submillimeter Array
17. South Pole Telescope
18. Very long baseline interferometry
19. M87* - the supermassive black hole in Messier 87
20. Sagittarius A* - the black hole at the centre of the Milky Way
21. The Event Horizon Telescope observes M87* and Sagittarius A*
22. M87* - the supermassive black hole in Messier 87
23. The photon sphere and the shadow
24. Event Horizon Telescope
25. Accretion disc
26. Very long baseline interferometry
27. The Event Horizon Telescope observes M87* and Sagittarius A*
28. Very long baseline interferometry
29. Atacama Large Millimeter/submillimeter Array
30. South Pole Telescope
31. The Event Horizon Telescope observes M87* and Sagittarius A*
32. The first image of a black hole shadow is published
33. The M87* ring is imaged in polarised light
34. The black hole at the centre of our own galaxy is imaged
35. A second epoch shows the ring persists and the bright spot moves
36. Event Horizon Telescope
37. The Event Horizon Telescope observes M87* and Sagittarius A*
38. Event Horizon Telescope
39. The Event Horizon Telescope observes M87* and Sagittarius A*
40. Event Horizon Telescope
41. The Event Horizon Telescope observes M87* and Sagittarius A*
42. The first image of a black hole shadow is published
43. Relativistic jet
44. Sagittarius A* - the black hole at the centre of the Milky Way
45. Heber Curtis records a curious straight ray in Messier 87
46. A mechanism for extracting energy from a spinning black hole
47. The Event Horizon Telescope observes M87* and Sagittarius A*
48. The first image of a black hole shadow is published
49. The M87* ring is imaged in polarised light
50. A second epoch shows the ring persists and the bright spot moves
51. M87* - the supermassive black hole in Messier 87
52. S2 - the star that measured the Galactic centre
53. A star is tracked through a complete close approach to the Galactic centre
54. The Event Horizon Telescope observes M87* and Sagittarius A*
55. S2 passes pericentre and its light is measurably redshifted
56. The orbit of S2 is shown to precess as general relativity predicts
57. The Nobel Prize in Physics recognises black holes twice over
58. The black hole at the centre of our own galaxy is imaged
59. Evidence
60. Reports the first image of a black hole shadow, an asymmetric ring about 42 microarcseconds across, together with the array, observing campaign and imaging methodology. V55 VERIFICATION BASIS: not consulted in session; WebFetch to iopscience.iop.org and eventhorizontelescope.org was refused by the egress proxy and no search could be issued. Volume and article number are from recall of a canonical citation.