  We consider supersymmetric gauge theories on round 3-sphere with a certain
background gauge field. The Lagrangians break the usual symmetry because the
background gauge field which we have turned on violates the isometry. In order
to maintain the supersymmetry, we choose unfamiliar charged Killing spinors as
N = 2 SUSY parameters. We perform localization calculous within this setup and
find the double sine function as we expected. We comment on more direct
relationship between theories on round sphere and squashed sphere via Weyl
transformation.
