\begin{figure}\hspace{0.cm}\epsfig{figure=lecs.ps,width=17cm,angle=0}\vspace{0.cm}\end{figure}
 

\begin{figure}\hspace{0.cm}\epsfig{figure=roll_mecs.ps,width=17cm,angle=0}\vspace{0.cm}\end{figure}
 
Figure 2: The differences in RA and Dec between LECS and MECS X-ray positions and optical positions plotted as a function of the spacecraft roll angle. The solid lines are best fits to the data and are discussed in the text.