Killing gauge for the 0-brane on AdS2×S2 coset superspace

How to gauge fix κ-symmetry for the super 0-brane action on AdS2×S2 in Killing gauge properly is discussed in order to find the superconformal mechanics which describes super 0-brane probes moving on AdS2×S2. The dependence on the coordinate frame for the proper Killing gauge is considered and the subtleties of gauge-fixing κ-symmetry in Killing gauge are analysed explicitly. It is found that the Killing gauge works indeed without the incompatibility if the magnetic charge of the super 0-brane is nonzero.