set terminal postscript eps enhanced color solid 'Times' 22 linewidth 2
# need to set encoding for the Angstrom symbol \305
set encoding iso_8859_1
set size ratio 0.5 
set output 'plot_spectra_ondrejov.eps'
set xlabel 'Wavelength ({\305})'
set ylabel 'Counts'
#set logscale y
plot [][2000:6000]\
'NovaCas2021_20210325.dat' u 1:2 w l title '2021-03-25', \
'NovaCas2021_20210404.dat' u 1:2 w l title '2021-04-04'
! convert -density 300  "plot_spectra_ondrejov.eps"  -background white -alpha remove  "plot_spectra_ondrejov.png"