  Elliptic ($v_2$) and triangular ($v_3$) anisotropic flow coefficients for
inclusive and identified charged hadrons (~$\pi^\pm$, $K^\pm$, $p$, $\bar{p}$~)
at midrapidity in Au+Au collisions, measured by the STAR experiment in the Beam
Energy Scan (BES) at the Relativistic Heavy Ion Collider at $\sqrt{s_{NN}}$ =
$11.5$ - $62.4$ GeV, are presented. We observe that the triangular flow signal
($v_3$) of identified hadrons exhibits similar trends as first observed for
$v_2$ in Au+Au collisions, i.e. (i) mass ordering at low transverse momenta,
$p_T < 2$ GeV/c, (ii) meson/baryon splitting at intermediate $p_T$, $2< p_T <
4$ GeV/c, and (iii) difference in flow signal of protons and antiprotons. New
measurements of $v_3$ excitation function could serve as constraints to test
different models and to aid new information about the temperature dependence of
the transport properties of the strongly interacting matter.
