We have measured ptβ-dependent two-particle number correlations on azimuth
and pseudorapidity for eleven centralities of sNNββ=62 and 200~GeV
Au-Au collisions at STAR. 2D fits to these angular correlations isolate the
azimuth quadrupole amplitude, denoted 2v22β{2D}(ptβ), from
localized same-side correlations. Event-plane v2β(ptβ) measurements within
the STAR TPC acceptance can be expressed as a sum of the azimuth quadrupole and
the quadrupole component of the same-side peak. v2β{2D}(ptβ) can be
transformed to reveal quadrupole ptβ spectra which are approximately
described by a fixed transverse boost and universal L\'evy form nearly
independent of centrality. A parametrization of v2β{2D}(ptβ) can be
factored into centrality and ptβ-dependent pieces with a simple ptβ
dependence above 0.75 GeV/c. Results from STAR are compared to published data
and model predictions.Comment: Conference proceedings for Hot Quarks 201