Elliptic Flow in Au-Au Collisions at RHIC Elliptic flow for charged particles in Au-Au collisions at RHIC has been measured using the Phobos detector. For the 200GeV Au-Au run, a new analysis was performed, using the Phobos Spectrometer. An overview of the method will be presented, together with its results on transverse momentum dependence of v_2, with p_T in the 0.04-4 GeV range, as well as centrality and pseudorapidity dependence within 0 < eta < 1.8.