set output 'spec_c.ps' 
set term postscript color enhanced 'Helvetica,18'  
set grid 
set key top right 
set ylabel 'Flux per unit wavelength (arb scale)' 
set xlabel 'Wavelength (nm) ' 
set title 'Tiny piece of solar spectrum '
plot [480:493][] './solar_smoothed.dat' using ($1):($2)       with lines lt 1 lc 3 lw 3 t ''  
set output 
quit 
