Title: Low regularity solutions of Chern-Simons-Schroedinger System Abstract: The nonrelativistic Chern-Simons model arise in the physics of high temperature superconductivity or second-quantized N-body anyone problem. Mathematically, it is a covariant NLS-type problem that is L2 critical. In this talk, I will introduce the so-called heat gauge which seems to be well-adapted to our problem. By exploring the null structure in the nonlinearity and applying bilinear estimates in finer scale, we obtain local wellposedness for initial data which is small in $H^s$, for s>0. This is joint work with Paul Smith and Daniel Tataru.