wavel.	cross sect.	error limit
-----------------------------------
184.950	4.40e-18	0.01e-18
202.548	6.25e-19	0.03e-19
206.200	5.73e-19	0.04e-19
213.857	3.62e-19	0.01e-19
228.802	6.44e-20	0.02e-20