VERA monitoring of the radio jet 3C 84 during 2007--2013: detection of
  non-linear motion
  We present a kinematic study of the subparsec-scale radio jet of the radio
galaxy 3C 84/NGC 1275 with the VLBI Exploration of Radio Astrometry (VERA)
array at 22 GHz for 80 epochs from 2007 October to 2013 December. The averaged
radial velocity of the bright component "C3" with reference to the radio core
is found to be $0.27 pm 0.02c$ between 2007 October and 2013 December. This
constant velocity of C3 is naturally explained by the advancing motion of the
head of the mini-radio lobe. We also find a non-linear component in the motion
of C3 with respect to the radio core. We briefly discuss possible origins of
this non-linear motion.
