00639nas a2200253   4500000000100000000000100001008004100002100001500043700001700058700001300075700001600088700001400104700001300118700002000131700002100151700001400172700002100186700001800207700001700225700001400242245011500256300000600371490000800377       2017                            d1 aK. Akiyama1 aK. Kuramochi1 aS. Ikeda1 aV. L. Fish1 aF. Tazaki1 aM. Honma1 aS. S. Doeleman1 aA. E. Broderick1 aJ. Dexter1 aM. Mościbrodzka1 aK. L. Bouman1 aA. A. Chael1 aM. Zaizen00aImaging the Schwarzschild-radius-scale Structure of M87 with the Event Horizon Telescope Using Sparse Modeling  a10 v838