Tutorial for closure phase problem. List of files in this repository:

• create_fits_images.ipynb: a Jupyter notebook for creating .fits files/ehtim images from image data
• generating_measurements.ipynb: a Jupyter notebook for reading in .fits files and generating visibility and closure phase measurements. It also shows how to make some useful plots
• arrays: a directory containing telescope array files that define the telescopes you wish to observe with
• data: a directory containing a sample image we use for the tutorial
• sample-run-pdfs: a directory containing pdfs showing expected sample output from running the 2 notebooks

If you use the data provided in the data directory, please make sure to cite the following papers and include the following acknowledgement:

Chael, Andrew, Ramesh Narayan, and Michael D. Johnson. "Two-temperature, Magnetically Arrested Disc simulations of the jet from the supermassive black hole in M87." Monthly Notices of the Royal Astronomical Society 486.2 (2019): 2873-2895.

Oliver Porth, Koushik Chatterjee, Ramesh Narayan, Charles F Gammie, Yosuke Mizuno, Peter Anninos, John G Baker, Matteo Bugli, Chi-kwan Chan, Jordy Davelaar, et al., “The event horizon general relativistic magnetohydrodynamic code comparison project,” The Astrophysical Journal Supplement Series, vol. 243, no. 2, pp. 26, 2019.?

The Event Horizon Telescope Collaboration. "First Sagittarius A* event horizon telescope results. V. Testing astrophysical models of the galactic center black hole." The Astrophysical Journal Letters 930.2 (2022): L16.

"We would like to thank Ben Prather, Abhishek Joshi, Vedant Dhruv, Chi-kwan Chan, and Charles Gammie for providing black hole simulations used in this work"