Splitting a long equation while maintaining size of brackets

Question

Possible Duplicate:
How to make \left, \right pairs of delimiter work over multiple lines?

How can I have this equation:

\begin{eqnarray}\nonumber
\ln T &=& -\sum\limits_{i=1}^{N} \left\{\ln(N2\pi\sigma_x(i)\sigma_y(i))\, \right.\\
    && \left. -\,\ln\left(\sum\limits_{j=1}^{M}\exp\left[-\frac{1}{2}\left(\frac{x_j^2}{\sigma_x(i)}+\frac{y_j^2}{\sigma_y(i)}\right)\right] \right) \right\}
\end{eqnarray}

show the same size for the opening and closing brackets? Right now it looks like this:

Edit

This works:

\begin{equation}
  \begin{aligned}
  \ln T &= -\sum\limits_{i=1}^{N} \Bigg\{\ln(N2\pi\sigma_x(i)\sigma_y(i))\, \\
  & -\,\ln\left(\sum\limits_{j=1}^{M}\exp\left[-\frac{1}{2}\left(\frac{x_j^2}{\sigma_x(i)}+\frac{y_j^2}{\sigma_y(i)}\right)
 \right] \right) \Bigg\}
   \end{aligned}
 \end{equation}