no code implementations • 22 Dec 2020 • Paul M. Chesler, Lindy Blackburn, Sheperd S. Doeleman, Michael D. Johnson, James M. Moran, Ramesh Narayan, Maciek Wielgus
We explore the coherent temporal autocorrelation function measured at a single telescope.
General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena
no code implementations • 5 Nov 2018 • Ziyan Zhu, Michael D. Johnson, Ramesh Narayan
This resolution may soon enable measurement of the black hole "shadow" size and asymmetry, predicted to be ${\approx}50\,\mu$as and ${\lesssim} 3\,\mu$as, respectively.
Instrumentation and Methods for Astrophysics Astrophysics of Galaxies
1 code implementation • 3 May 2018 • Dimitrios Psaltis, Michael Johnson, Ramesh Narayan, Lia Medeiros, Lindy Blackburn, Geoff Bower
For expected values of the inner scale, the scattering kernel for all models is markedly non-Gaussian at 1. 3 mm but is straightforward to calculate and depends only weakly on the assumed model for the wandering of the magnetic field direction.
High Energy Astrophysical Phenomena
1 code implementation • 19 Mar 2018 • Andrew A. Chael, Michael D. Johnson, Katherine L. Bouman, Lindy L. Blackburn, Kazunori Akiyama, Ramesh Narayan
Closure-only imaging provides results that are as non-committal as possible and allows for reconstructing an image independently from separate amplitude and phase self-calibration.
Instrumentation and Methods for Astrophysics High Energy Astrophysical Phenomena
1 code implementation • 19 May 2016 • Andrew A. Chael, Michael D. Johnson, Ramesh Narayan, Sheperd S. Doeleman, John F. C. Wardle, Katherine L. Bouman
Polarimetric MEM is thus an attractive choice for image reconstruction with the
Instrumentation and Methods for Astrophysics Astrophysics of Galaxies
