set terminal postscript eps color enhanced font "Helvetica,14" size 8.6cm,6cm
set output 'visibility.eps'

limit(x)=0.5;

set xlabel "Coincidence window width (ns)"
set ylabel "Visibility"
set xtics 50 nomirror
set ytics 0.1 nomirror

plot [0:400][0.2:1] 'visibility.dat' u 1:2:3 w yerrorbars pt 4 lt 1 notitle,\
limit(x) lt 3 lc rgb "black" notitle