ABSTRACT: Coulomb branch of a 3d gauge theory is defined (after Braverman-Finkelberg-N) as the spectrum of a certain commutative ring, defined as a convolution algebra of a certain infinite dimensional variety. A variant of its definition gives a (partial) resolution, when we have the so-called flavor symmetry in the theory. We identify the resolution with smooth Cherkis bow variety for a quiver gauge theory of an affine type A. (Joint work with Braverman and Finkelberg).