00404nas a2200169   4500000000100000000000100001008004100002100001500043700001200058700001100070700001200081700001300093700001400106245009800120300000800218490000800226       2015                            d1 aK. Niinuma1 aM. Kino1 aA. Doi1 aK. Hada1 aH. Nagai1 aS. Koyama00aDiscovery of a Wandering Radio Jet Base after a Large X-Ray Flare in the Blazar Markarian 421  aL140 v807