  The relationship between jet properties and the underlying geometry of the
medium produced in heavy ion collisions can be explored through a measurement
of the correlation between the axes of reconstructed jets and the reaction
plane, defined as "jet v2." Such a measurement provides information on the
pathlength dependence of medium-induced parton energy loss and may also be used
to assess biases in jet-finding methods. We present first measurements of jet
v2 in sqrt(sNN) = 200 GeV Au+Au collisions in the STAR experiment at RHIC. In
order to reduce the artificial jet - event plane bias, which results from jet
fragments being included in the event plane calculation, detectors at forward
pseudorapidity are used to determine the event plane when measuring the v2 of
reconstructed jets at mid-rapidity. These measurements demonstrate a non-zero
jet v2, which is indicative of pathlength-dependent parton energy loss.
