  A sample of 1.25x10^9 phi decays, collected with the KLOE detector at the
Frascati phi-factory DAFNE at center of mass energy ~ Mphi, has been used to
study the radiative decay phi to eta pi0 gamma. This decay is dominated by phi
to a0(980) gamma. Two decay chains, corresponding to eta to gamma gamma and eta
to pi+ pi- pi0, have been selected. We found respectively: Br(phi to eta pi0
gamma)=(6.92 +/- 0.10 (stat.) +/- 0.20 (syst.))x10^(-5) and (7.19 +/- 0.17
(stat.) +/- 0.24 (syst.))x 10 ^(-5). The eta pi0 invariant mass distributions
have been fitted to obtain the relevant a0(980) parameters.
