Radiative decay modes of the $D^0$ meson

In this paper we describe a search for four radiative decay modes of the $D^0$ meson: $D^0\to \phi \gamma ,$ $D^0\to \omega \gamma ,$ $D^0\to K^{*}\gamma ,$ and $D^0\to {\rho }^0\gamma .$ We obtain 90% C.L. upper limits on the branching ratios of these modes of $1.9\times {10}^{-4},$ $2.4\times {10}^{-4},$ $7.6\times {10}^{-4},$ and $2.4\times {10}^{-4},$ respectively.