Search for the rare decays $B\rightarrow \rho\gamma$ and $B^0\rightarrow\omega\gamma$

Rare $B$ decays that follow a $b\to d\gamma$ transition are sensitive to the ratio $|V_{td}/V_{ts}|$ and are a promising probe for new physics. Decays of this type are most easily accessible through the rare decays $B\to\rho\gamma$ and $B^0\to\omega\gamma$. We present preliminary results of a search for these decays in a sample of approximately 300 million $B\bar{B}$ pairs collected with the BaBar detector at the PEP-II asymmetric-energy $B$ Factory at SLAC.