  The noncentrosymmetric superconductor TaOs has been characterized using x-ray
diffraction, resistivity, magnetization, and specific heat measurements.
Magnetization and specific heat measurements show a bulk superconducting
transition at 2.07 K. These measurements suggest that TaOs is a weakly coupled
type-II superconductor. The electronic specific heat in the superconducting
state can be explained by the single-gap BCS model, suggesting s-wave
superconductivity in TaOs.
