If the spectrum is available as ASCII file, simply 2 columns of value pairs (wavelength and flux in float format) without heading, it can be plotted with the simple script 1d_txt_plot.py (download here).
If the spectrum is available as ASCII file, simply 2 columns of value pairs (wavelength and flux in float format) without heading, it can be plotted with the simple script 1d_txt_plot.py (download here).
Astrospectroscopy 