set terminal postscript eps enhanced color size 8.6cm, 6cm dl 3\
font "Helvetica, 16pt"
set output 'g2_cw.eps'

# set termoption dashlength .9

unset key
unset bars
set xlabel 'Time difference {/Symbol D}t ({/Symbol m}s)'
set ylabel 'g^{(2)}' #offset 2,0
# set xrange [0:1]
set xrange [0:3]
set yrange [0:4.2]
set ytics 1
set xtics 1
plot'g2_data.dat' u ($1/1e3):2:3 with yerrorbar lw 3 pt 6 lc 'black' notitle, \
    1 notitle lc 'red' lw 3 #dashtype (3, 1)