% GNUPLOT: LaTeX picture with Postscript
\begingroup
  \makeatletter
  \providecommand\color[2][]{%
    \GenericError{(gnuplot) \space\space\space\@spaces}{%
      Package color not loaded in conjunction with
      terminal option `colourtext'%
    }{See the gnuplot documentation for explanation.%
    }{Either use 'blacktext' in gnuplot or load the package
      color.sty in LaTeX.}%
    \renewcommand\color[2][]{}%
  }%
  \providecommand\includegraphics[2][]{%
    \GenericError{(gnuplot) \space\space\space\@spaces}{%
      Package graphicx or graphics not loaded%
    }{See the gnuplot documentation for explanation.%
    }{The gnuplot epslatex terminal needs graphicx.sty or graphics.sty.}%
    \renewcommand\includegraphics[2][]{}%
  }%
  \providecommand\rotatebox[2]{#2}%
  \@ifundefined{ifGPcolor}{%
    \newif\ifGPcolor
    \GPcolortrue
  }{}%
  \@ifundefined{ifGPblacktext}{%
    \newif\ifGPblacktext
    \GPblacktexttrue
  }{}%
  % define a \g@addto@macro without @ in the name:
  \let\gplgaddtomacro\g@addto@macro
  % define empty templates for all commands taking text:
  \gdef\gplbacktext{}%
  \gdef\gplfronttext{}%
  \makeatother
  \ifGPblacktext
    % no textcolor at all
    \def\colorrgb#1{}%
    \def\colorgray#1{}%
  \else
    % gray or color?
    \ifGPcolor
      \def\colorrgb#1{\color[rgb]{#1}}%
      \def\colorgray#1{\color[gray]{#1}}%
      \expandafter\def\csname LTw\endcsname{\color{white}}%
      \expandafter\def\csname LTb\endcsname{\color{black}}%
      \expandafter\def\csname LTa\endcsname{\color{black}}%
      \expandafter\def\csname LT0\endcsname{\color[rgb]{1,0,0}}%
      \expandafter\def\csname LT1\endcsname{\color[rgb]{0,1,0}}%
      \expandafter\def\csname LT2\endcsname{\color[rgb]{0,0,1}}%
      \expandafter\def\csname LT3\endcsname{\color[rgb]{1,0,1}}%
      \expandafter\def\csname LT4\endcsname{\color[rgb]{0,1,1}}%
      \expandafter\def\csname LT5\endcsname{\color[rgb]{1,1,0}}%
      \expandafter\def\csname LT6\endcsname{\color[rgb]{0,0,0}}%
      \expandafter\def\csname LT7\endcsname{\color[rgb]{1,0.3,0}}%
      \expandafter\def\csname LT8\endcsname{\color[rgb]{0.5,0.5,0.5}}%
    \else
      % gray
      \def\colorrgb#1{\color{black}}%
      \def\colorgray#1{\color[gray]{#1}}%
      \expandafter\def\csname LTw\endcsname{\color{white}}%
      \expandafter\def\csname LTb\endcsname{\color{black}}%
      \expandafter\def\csname LTa\endcsname{\color{black}}%
      \expandafter\def\csname LT0\endcsname{\color{black}}%
      \expandafter\def\csname LT1\endcsname{\color{black}}%
      \expandafter\def\csname LT2\endcsname{\color{black}}%
      \expandafter\def\csname LT3\endcsname{\color{black}}%
      \expandafter\def\csname LT4\endcsname{\color{black}}%
      \expandafter\def\csname LT5\endcsname{\color{black}}%
      \expandafter\def\csname LT6\endcsname{\color{black}}%
      \expandafter\def\csname LT7\endcsname{\color{black}}%
      \expandafter\def\csname LT8\endcsname{\color{black}}%
    \fi
  \fi
    \setlength{\unitlength}{0.0500bp}%
    \ifx\gptboxheight\undefined%
      \newlength{\gptboxheight}%
      \newlength{\gptboxwidth}%
      \newsavebox{\gptboxtext}%
    \fi%
    \setlength{\fboxrule}{0.5pt}%
    \setlength{\fboxsep}{1pt}%
\begin{picture}(8446.00,8502.00)%
    \gplgaddtomacro\gplbacktext{%
      \csname LTb\endcsname%%
      \put(1032,5219){\makebox(0,0)[r]{\strut{}0.75}}%
      \put(1032,6220){\makebox(0,0)[r]{\strut{}1.00}}%
      \put(1032,7220){\makebox(0,0)[r]{\strut{}1.25}}%
      \put(1032,8221){\makebox(0,0)[r]{\strut{}1.50}}%
      \put(1664,4779){\makebox(0,0){\strut{}$-600$}}%
      \put(2641,4779){\makebox(0,0){\strut{}$-400$}}%
      \put(3618,4779){\makebox(0,0){\strut{}$-200$}}%
      \put(4595,4779){\makebox(0,0){\strut{}$0$}}%
      \put(5571,4779){\makebox(0,0){\strut{}$200$}}%
      \put(6548,4779){\makebox(0,0){\strut{}$400$}}%
      \put(7525,4779){\makebox(0,0){\strut{}$600$}}%
      \put(1313,7937){\makebox(0,0)[l]{\strut{}(a)}}%
    }%
    \gplgaddtomacro\gplfronttext{%
      \csname LTb\endcsname%%
      \put(228,6640){\rotatebox{-270}{\makebox(0,0){\strut{}$g^{(2)}$}}}%
      \put(4594,4419){\makebox(0,0){\strut{}time difference between photoevents $\tau$ (ns)}}%
      \csname LTb\endcsname%%
      \put(6942,8078){\makebox(0,0)[r]{\strut{}$\alpha$=0.50}}%
      \csname LTb\endcsname%%
      \put(6942,7838){\makebox(0,0)[r]{\strut{}$\alpha$=0.15}}%
      \csname LTb\endcsname%%
      \put(6942,7598){\makebox(0,0)[r]{\strut{}$\alpha$=0.00}}%
    }%
    \gplgaddtomacro\gplbacktext{%
      \csname LTb\endcsname%%
      \put(1032,768){\makebox(0,0)[r]{\strut{}0.00}}%
      \put(1032,1358){\makebox(0,0)[r]{\strut{}0.10}}%
      \put(1032,1947){\makebox(0,0)[r]{\strut{}0.20}}%
      \put(1032,2537){\makebox(0,0)[r]{\strut{}0.30}}%
      \put(1032,3127){\makebox(0,0)[r]{\strut{}0.40}}%
      \put(1032,3716){\makebox(0,0)[r]{\strut{}0.50}}%
      \put(1176,528){\makebox(0,0){\strut{}$0$}}%
      \put(2517,528){\makebox(0,0){\strut{}$0.1$}}%
      \put(3857,528){\makebox(0,0){\strut{}$0.2$}}%
      \put(5198,528){\makebox(0,0){\strut{}$0.3$}}%
      \put(6538,528){\makebox(0,0){\strut{}$0.4$}}%
      \put(7879,528){\makebox(0,0){\strut{}$0.5$}}%
      \put(1313,3687){\makebox(0,0)[l]{\strut{}(b)}}%
    }%
    \gplgaddtomacro\gplfronttext{%
      \csname LTb\endcsname%%
      \put(228,2389){\rotatebox{-270}{\makebox(0,0){\strut{}$g^{(2)}(0)-1$}}}%
      \put(4594,168){\makebox(0,0){\strut{}power ratio $\alpha$}}%
    }%
    \gplbacktext
    \put(0,0){\includegraphics{g2_vs_alpha}}%
    \gplfronttext
  \end{picture}%
\endgroup