wavel.	cross sect.	error limit
-----------------------------------
184.950	4.18e-18	0.008e-18
202.548	6.49e-19	0.01e-19
206.200	5.87e-19	0.02e-19
213.857	3.52e-19	0.01e-19
228.802	4.85e-20	0.01e-20