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An international collaboration presents paradigm-shifting observations of the gargantuan black hole at the heart of distant galaxy Messier 87 The Event Horizon Telescope (EHT) — a planet-scale array of eight ground-based radio telescopes forged through...

EHT Data Product Code Title Author(s) Last Updated Access Link(s) Reference 2024-D02-01 EHT Sagittarius A* Polarized Data The EHT Collaboration et al. Mar. 27, 2024 CyVerse Data Commons (DOI: 10.25739/k39c-mh27) The Event Horizon Telescope Collaboration...

How does interferometry work? Black holes are so so tiny on the sky that any effort to image a black hole requires a team of telescopes, all working together, using a technique called interferometry. This graphic from the National Radio Astronomy...

EHT Memo Code Title Author(s) Last Updated 2023-L1-02 Absolute Flux Density Calibration of the Greenland TelescopeData for Event Horizon Telescope Observations Koay et al. 17 Jan 2024 2023-L1-01 Metadata for the Flux Density Calibration of the April 2018...

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News and documentation for the next proposal deadline: ALMA Cycle 11 (2024/2025) Pre-Announcement (20-Dec-2024) ALMA Cycle 11 (21 March 2024) Call for Proposals ALMA Cycle 11 Proposer's guide ALMA Cycle 11 Technical Handbook Special notes for Cycle 11...

To request speakers on EHT science, please contact the EHT Speakers Bureau at the e-mail address below: EHT Speakers Bureau members 2023-2024: Juan Carlos Algaba (co-chair), Yuzhu Cui, Michael Lindqvist, Alexandra Tetarenko, Efthalia Traianou (co-chair)...