\documentclass[12pt]{article}
\usepackage{graphicx}
\addtolength{\textheight}{3\baselineskip}
\setlength{\textwidth}{6.5in}
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\begin{document}
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\thispagestyle{empty}
\vspace*{.1in}
\begin{figure}
\begin{center}
  \centerline{\includegraphics[bb=150 270 450 620, width=580pt, angle=0]{plots/A1n_new2.ps}}
\end{center}
\end{figure}

\end{document}
