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How much data is recorded during an observation and how it is transferred to the central processing facilities?
Depending on instrument setup, weather, position within the array, and other factors, a five-day observing campaign can produce about a Petabyte (PB) of raw data per observatory. The total amount of raw data recorded in April 2017 is about 3.5 PB. This...
Do you only use radio telescopes or are you also looking at higher-energy emission? What makes radio telescopes superior to, for example, X-ray telescopes?
Scientists of the EHT and their collaborators try to organize observations with a number of different telescopes so that they coincide with observations with EHT observations. The aim of this is to provide multi-wavelength coverage in order to...
How many telescopes are currently in the EHT network?
The EHT is an evolving network of telescopes. Observations in April 2017 were carried out with eight observatories in six geographical locations around the globe. For the observing campaign in 2018, one new telescope was added to the array, totalling...
How realistic are movie depictions of black holes, for example in the "Interstellar"?
The portrayal of the black hole "Gargantua" in the movie Interstellar is somewhat realistic, in that they show the general morphology of these cosmic structures accurately. However, for aesthetic reasons, the movie producers removed one important aspect...
Why is it important to study black holes? What is there to be learned from the EHT observations?
As a scientific collaboration, the aim of the EHT is not only to prove the existence of black holes, but also to understand the physics of black holes and their surrounding environments. There is ample indirect evidence from various astronomical studies...
Can we really photograph a black hole? Are they not entirely dark, since no light can escape them?
The first image of a black hole is not a classical photograph. It is a radiolight image the result of complex observational and computational interpretation (deconvolution). Further, it is not of the black hole itself, but of the "shadow"—the closest we...
How long did it take to make an image of a black hole?
Observational campaigns in both April 2017 and April 2018 were conducted over five observing nights. These data were recorded when the major target sources were optimally observable by night and when the weather was globally best for EHT observations...
How many researchers contributed to making of the first black hole image?
The Event Horizon Telescope (EHT) Collaboration is a team of two hundred individual researchers situated at a number of research institutions around the world. The EHT is subdivided into different expert teams to address the different challenges of the...
ADS Library of EHT Publications
https://ui.adsabs.harvard.edu/ public-libraries/ VFaebic8RGqFB9UuW9corg