230 GHz VLBI Observations of M87: Event-horizon-scale Structure during an Enhanced Very-high-energy γ-Ray State in 2012

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By K. Akiyama, R.-S. Lu, V. L. Fish, S. S. Doeleman, A. E. Broderick, J. Dexter, K. Hada, M. Kino, H. Nagai, M. Honma, M. D. Johnson, J. C. Algaba, K. Asada, C. Brinkerink, R. Blundell, G. C. Bower, R. Cappallo, G. B. Crew, M. Dexter, S. A. Dzib, R. Freund, P. Friberg, M. Gurwell, P. T. P. Ho, M. Inoue, T. P. Krichbaum, L. Loinard, D. MacMahon, D. P. Marrone, J. M. Moran, M. Nakamura, N. M. Nagar, G. Ortiz-Leon, R. Plambeck, N. Pradel, R. A. Primiani, A. E. E. Rogers, A. L. Roy, J. SooHoo, J.-L. Tavares, R. P. J. Tilanus, M. Titus, J. Wagner, J. Weintroub, P. Yamaguchi, K. H. Young, A. Zensus, and L. M. Ziurys. 2015. “230 GHz VLBI Observations of M87: Event-Horizon-Scale Structure During an Enhanced Very-High-Energy γ-Ray State in 2012”. ApJ, 807, Pp. 150. doi:10.1088/0004-637X/807/2/150.