In the Shadow of the Black Hole
summary
The Event Horizon Telescope generates a planet‑scale image of M87 by linking global dishes with 230 GHz VLBI, time‑stamping signals on atomic clocks and shipping roughly 736 hard drives of raw data to a correlator, then reducing petabytes to a kilobyte‑scale image via three independent calibration pipelines. Four blind imaging teams run tens of thousands of synthetic tests, compare results, and converge on a lopsided ring; fitting yields 6.5 billion solar masses for the black hole. Software (SMILI, EHTim, THEMIS, GENA) is open on GitHub.
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chapters (10)
- 0:00Welcome and introduction
- 1:52How the EHT works
- 6:44From data to images
- 11:38Imaging techniques explained
- 18:53Final image processing
- 20:42Measuring black hole mass
- 23:10Theoretical interpretation
- 31:08Testing Einstein’s theory
- 34:49Open science and collaboration
- 37:40Q&A session
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