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Observing—and Imaging—Active Galactic Nuclei with the Event Horizon Telescope

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Massachusetts Institute of Technology, Haystack Observatory, Westford, MA 01886, USA
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Japan Society for the Promotion of Science, Chiyoda (Tokyo) 102-0083, Japan
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Massachusetts Institute of Technology, Computer Science and Artificial Intelligence Laboratory, Cambridge, MA 02139, USA
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Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA
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Physics Department, Brandeis University, Waltham, MA 02453, USA
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Google Inc., 1600 Amphitheatre Parkway, Mountain View, CA 94043, USA
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Author to whom correspondence should be addressed.
Academic Editors: Jose L. Gómez, Alan P. Marscher and Svetlana G. Jorstad
Galaxies 2016, 4(4), 54; https://doi.org/10.3390/galaxies4040054
Received: 11 July 2016 / Revised: 13 October 2016 / Accepted: 15 October 2016 / Published: 27 October 2016
(This article belongs to the Special Issue Blazars through Sharp Multi-wavelength Eyes)
Originally developed to image the shadow region of the central black hole in Sagittarius A* and in the nearby galaxy M87, the Event Horizon Telescope (EHT) provides deep, very high angular resolution data on other active galactic nucleus (AGN) sources too. The challenges of working with EHT data have spurred the development of new image reconstruction algorithms. This work briefly reviews the status of the EHT and its utility for observing AGN sources, with emphasis on novel imaging techniques that offer the promise of better reconstructions at 1.3 mm and other wavelengths. View Full-Text
Keywords: galaxies: jets; galaxy: center; techniques: high angular resolution; techniques: image processing; techniques: interferometric galaxies: jets; galaxy: center; techniques: high angular resolution; techniques: image processing; techniques: interferometric
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Fish, V.L.; Akiyama, K.; Bouman, K.L.; Chael, A.A.; Johnson, M.D.; Doeleman, S.S.; Blackburn, L.; Wardle, J.F.C.; Freeman, W.T.; The Event Horizon Telescope Collaboration. Observing—and Imaging—Active Galactic Nuclei with the Event Horizon Telescope. Galaxies 2016, 4, 54.

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